documentation/overview.md

@@ -15,11 +15,7 @@ Smack Key Advantages
     AbstractXMPPConnection connection = new XMPPTCPConnection("mtucker", "password", "jabber.org");
     connection.connect().login();
 
-    Message message = connection.getStanzaFactory()
-                      .buildMessageStanza()
-                      .to("jsmith@jivesoftware.com")
-                      .setBody("Howdy! How are you?")
-                      .build();
+    Message message = new Message("jsmith@jivesoftware.com", "Howdy! How are you?");
     connection.sendStanza(message);
     ```
 

resources/fix-a-javadoc.sh

@@ -28,17 +28,17 @@ SMACK_EXCEPTIONS[InterruptedException]="if the calling thread was interrupted."
 SMACK_EXCEPTIONS[XMPPErrorException]="if there was an XMPP error returned."
 SMACK_EXCEPTIONS[NoResponseException]="if there was no response from the remote entity."
 SMACK_EXCEPTIONS[NotLoggedInException]="if the XMPP connection is not authenticated."
-SMACK_EXCEPTIONS[BOSHException]="if an BOSH related error occurred."
-SMACK_EXCEPTIONS[IOException]="if an I/O error occurred."
+SMACK_EXCEPTIONS[BOSHException]="if an BOSH related error occured."
+SMACK_EXCEPTIONS[IOException]="if an I/O error occured."
 SMACK_EXCEPTIONS[SmackException]="if Smack detected an exceptional situation."
 SMACK_EXCEPTIONS[XMPPException]="if an XMPP protocol error was received."
-SMACK_EXCEPTIONS[SmackSaslException]="if a SASL specific error occurred."
+SMACK_EXCEPTIONS[SmackSaslException]="if a SASL specific error occured."
 SMACK_EXCEPTIONS[SASLErrorException]="if a SASL protocol error was returned."
 SMACK_EXCEPTIONS[NotAMucServiceException]="if the entity is not a MUC serivce."
 SMACK_EXCEPTIONS[NoSuchAlgorithmException]="if no such algorithm is available."
 SMACK_EXCEPTIONS[KeyManagementException]="if there was a key mangement error."
 SMACK_EXCEPTIONS[XmppStringprepException]="if the provided string is invalid."
-SMACK_EXCEPTIONS[XmlPullParserException]="if an error in the XML parser occurred."
+SMACK_EXCEPTIONS[XmlPullParserException]="if an error in the XML parser occured."
 SMACK_EXCEPTIONS[SmackParsingException]="if the Smack parser (provider) encountered invalid input."
 SMACK_EXCEPTIONS[MucNotJoinedException]="if not joined to the Multi-User Chat."
 SMACK_EXCEPTIONS[MucAlreadyJoinedException]="if already joined the Multi-User Chat."7y
@@ -54,7 +54,7 @@ SMACK_EXCEPTIONS[IllegalArgumentException]="if an illegal argument was given."
 SMACK_EXCEPTIONS[NotAPubSubNodeException]="if a involved node is not a PubSub node."
 SMACK_EXCEPTIONS[NoAcceptableTransferMechanisms]="if no acceptable transfer mechanisms are available"
 SMACK_EXCEPTIONS[NoSuchMethodException]="if no such method is declared"
-SMACK_EXCEPTIONS[Exception]="if an exception occurred."
+SMACK_EXCEPTIONS[Exception]="if an exception occured."
 SMACK_EXCEPTIONS[TestNotPossibleException]="if the test is not possible."
 SMACK_EXCEPTIONS[TimeoutException]="if there was a timeout."
 SMACK_EXCEPTIONS[IllegalStateException]="if an illegal state was encountered"

smack-bosh/src/main/java/org/jivesoftware/smack/bosh/XMPPBOSHConnection.java

@@ -517,8 +517,8 @@ public class XMPPBOSHConnection extends AbstractXMPPConnection {
                                 if ("urn:ietf:params:xml:ns:xmpp-streams".equals(parser.getNamespace(null))) {
                                     throw new StreamErrorException(PacketParserUtils.parseStreamError(parser));
                                 } else {
-                                    StanzaError stanzaError = PacketParserUtils.parseError(parser);
-                                    throw new XMPPException.XMPPErrorException(null, stanzaError);
+                                    StanzaError.Builder builder = PacketParserUtils.parseError(parser);
+                                    throw new XMPPException.XMPPErrorException(null, builder.build());
                                 }
                             default:
                                 parseAndProcessNonza(parser);

smack-core/src/main/java/org/jivesoftware/smack/AbstractXMPPConnection.java

@@ -100,22 +100,16 @@ import org.jivesoftware.smack.packet.FullyQualifiedElement;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Mechanisms;
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
-import org.jivesoftware.smack.packet.MessageOrPresence;
-import org.jivesoftware.smack.packet.MessageOrPresenceBuilder;
 import org.jivesoftware.smack.packet.Nonza;
 import org.jivesoftware.smack.packet.Presence;
-import org.jivesoftware.smack.packet.PresenceBuilder;
 import org.jivesoftware.smack.packet.Session;
 import org.jivesoftware.smack.packet.Stanza;
 import org.jivesoftware.smack.packet.StanzaError;
-import org.jivesoftware.smack.packet.StanzaFactory;
 import org.jivesoftware.smack.packet.StartTls;
 import org.jivesoftware.smack.packet.StreamError;
 import org.jivesoftware.smack.packet.StreamOpen;
 import org.jivesoftware.smack.packet.TopLevelStreamElement;
 import org.jivesoftware.smack.packet.XmlEnvironment;
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
 import org.jivesoftware.smack.parsing.ParsingExceptionCallback;
 import org.jivesoftware.smack.parsing.SmackParsingException;
 import org.jivesoftware.smack.provider.ExtensionElementProvider;
@@ -127,13 +121,11 @@ import org.jivesoftware.smack.sasl.core.SASLAnonymous;
 import org.jivesoftware.smack.sasl.packet.SaslNonza;
 import org.jivesoftware.smack.util.Async;
 import org.jivesoftware.smack.util.CollectionUtil;
-import org.jivesoftware.smack.util.Consumer;
 import org.jivesoftware.smack.util.DNSUtil;
 import org.jivesoftware.smack.util.MultiMap;
 import org.jivesoftware.smack.util.Objects;
 import org.jivesoftware.smack.util.PacketParserUtils;
 import org.jivesoftware.smack.util.ParserUtils;
-import org.jivesoftware.smack.util.Predicate;
 import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smack.util.dns.HostAddress;
 import org.jivesoftware.smack.util.dns.SmackDaneProvider;
@@ -249,10 +241,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
     private final Map<StanzaListener, InterceptorWrapper> interceptors =
             new HashMap<>();
 
-    private final Map<Consumer<MessageBuilder>, GenericInterceptorWrapper<MessageBuilder, Message>> messageInterceptors = new HashMap<>();
-
-    private final Map<Consumer<PresenceBuilder>, GenericInterceptorWrapper<PresenceBuilder, Presence>> presenceInterceptors = new HashMap<>();
-
     private XmlEnvironment incomingStreamXmlEnvironment;
 
     protected XmlEnvironment outgoingStreamXmlEnvironment;
@@ -414,8 +402,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
     private final Map<QName, IQRequestHandler> setIqRequestHandler = new HashMap<>();
     private final Map<QName, IQRequestHandler> getIqRequestHandler = new HashMap<>();
 
-    private final StanzaFactory stanzaFactory;
-
     /**
      * Create a new XMPPConnection to an XMPP server.
      *
@@ -454,9 +440,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         for (ConnectionCreationListener listener : XMPPConnectionRegistry.getConnectionCreationListeners()) {
             listener.connectionCreated(this);
         }
-
-        StanzaIdSource stanzaIdSource = configuration.constructStanzaIdSource();
-        stanzaFactory = new StanzaFactory(stanzaIdSource);
     }
 
     /**
@@ -535,7 +518,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      *
      * @throws XMPPException if an error occurs on the XMPP protocol level.
      * @throws SmackException if an error occurs somewhere else besides XMPP protocol level.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @return a reference to this object, to chain <code>connect()</code> with <code>login()</code>.
      * @throws InterruptedException if the calling thread was interrupted.
      */
@@ -575,7 +558,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      * login if the previous connection state was logged (authenticated).
      *
      * @throws SmackException if Smack detected an exceptional situation.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @throws XMPPException if an XMPP protocol error was received.
      * @throws InterruptedException if the calling thread was interrupted.
      */
@@ -628,7 +611,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      * @param password TODO javadoc me please
      * @throws XMPPException if an XMPP protocol error was received.
      * @throws SmackException if Smack detected an exceptional situation.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @throws InterruptedException if the calling thread was interrupted.
      * @see #login
      */
@@ -646,7 +629,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      * @param resource TODO javadoc me please
      * @throws XMPPException if an XMPP protocol error was received.
      * @throws SmackException if Smack detected an exceptional situation.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @throws InterruptedException if the calling thread was interrupted.
      * @see #login
      */
@@ -750,11 +733,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         // eventually load the roster. And we should load the roster before we
         // send the initial presence.
         if (config.isSendPresence() && !resumed) {
-            Presence availablePresence = getStanzaFactory()
-                            .buildPresenceStanza()
-                            .ofType(Presence.Type.available)
-                            .build();
-            sendStanza(availablePresence);
+            sendStanza(new Presence(Presence.Type.available));
         }
     }
 
@@ -835,11 +814,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         }
     }
 
-    @Override
-    public final StanzaFactory getStanzaFactory() {
-        return stanzaFactory;
-    }
-
     @Override
     public final void sendStanza(Stanza stanza) throws NotConnectedException, InterruptedException {
         Objects.requireNonNull(stanza, "Stanza must not be null");
@@ -859,8 +833,8 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         }
         // Invoke interceptors for the new stanza that is about to be sent. Interceptors may modify
         // the content of the stanza.
-        Stanza stanzaAfterInterceptors = firePacketInterceptors(stanza);
-        sendStanzaInternal(stanzaAfterInterceptors);
+        firePacketInterceptors(stanza);
+        sendStanzaInternal(stanza);
     }
 
     /**
@@ -873,9 +847,9 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
      * @return the used SASLMechanism.
      * @throws XMPPErrorException if there was an XMPP error returned.
      * @throws SASLErrorException if a SASL protocol error was returned.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @throws InterruptedException if the calling thread was interrupted.
-     * @throws SmackSaslException if a SASL specific error occurred.
+     * @throws SmackSaslException if a SASL specific error occured.
      * @throws NotConnectedException if the XMPP connection is not connected.
      * @throws NoResponseException if there was no response from the remote entity.
      * @throws SmackWrappedException in case of an exception.
@@ -919,9 +893,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
     public void disconnect() {
         Presence unavailablePresence = null;
         if (isAuthenticated()) {
-            unavailablePresence = getStanzaFactory().buildPresenceStanza()
-                            .ofType(Presence.Type.unavailable)
-                            .build();
+            unavailablePresence = new Presence(Presence.Type.unavailable);
         }
         try {
             disconnect(unavailablePresence);
@@ -1214,7 +1186,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         });
     }
 
-    @Deprecated
     @Override
     public void addStanzaInterceptor(StanzaListener packetInterceptor,
             StanzaFilter packetFilter) {
@@ -1227,7 +1198,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         }
     }
 
-    @Deprecated
     @Override
     public void removeStanzaInterceptor(StanzaListener packetInterceptor) {
         synchronized (interceptors) {
@@ -1235,83 +1205,15 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         }
     }
 
-    private static <MPB extends MessageOrPresenceBuilder<MP, MPB>, MP extends MessageOrPresence<MPB>> void addInterceptor(
-                    Map<Consumer<MPB>, GenericInterceptorWrapper<MPB, MP>> interceptors, Consumer<MPB> interceptor,
-                    Predicate<MP> filter) {
-        Objects.requireNonNull(interceptor, "Interceptor must not be null");
-
-        GenericInterceptorWrapper<MPB, MP> interceptorWrapper = new GenericInterceptorWrapper<>(interceptor, filter);
-
-        synchronized (interceptors) {
-            interceptors.put(interceptor, interceptorWrapper);
-        }
-    }
-
-    private static <MPB extends MessageOrPresenceBuilder<MP, MPB>, MP extends MessageOrPresence<MPB>> void removeInterceptor(
-                    Map<Consumer<MPB>, GenericInterceptorWrapper<MPB, MP>> interceptors, Consumer<MPB> interceptor) {
-        synchronized (interceptors) {
-            interceptors.remove(interceptor);
-        }
-    }
-
-    @Override
-    public void addMessageInterceptor(Consumer<MessageBuilder> messageInterceptor, Predicate<Message> messageFilter) {
-        addInterceptor(messageInterceptors, messageInterceptor, messageFilter);
-    }
-
-    @Override
-    public void removeMessageInterceptor(Consumer<MessageBuilder> messageInterceptor) {
-        removeInterceptor(messageInterceptors, messageInterceptor);
-    }
-
-    @Override
-    public void addPresenceInterceptor(Consumer<PresenceBuilder> presenceInterceptor,
-                    Predicate<Presence> presenceFilter) {
-        addInterceptor(presenceInterceptors, presenceInterceptor, presenceFilter);
-    }
-
-    @Override
-    public void removePresenceInterceptor(Consumer<PresenceBuilder> presenceInterceptor) {
-        removeInterceptor(presenceInterceptors, presenceInterceptor);
-    }
-
-    private static <MPB extends MessageOrPresenceBuilder<MP, MPB>, MP extends MessageOrPresence<MPB>> MP fireMessageOrPresenceInterceptors(
-                    MP messageOrPresence, Map<Consumer<MPB>, GenericInterceptorWrapper<MPB, MP>> interceptors) {
-        List<Consumer<MPB>> interceptorsToInvoke = new LinkedList<>();
-        synchronized (interceptors) {
-            for (GenericInterceptorWrapper<MPB, MP> interceptorWrapper : interceptors.values()) {
-                if (interceptorWrapper.filterMatches(messageOrPresence)) {
-                    Consumer<MPB> interceptor = interceptorWrapper.getInterceptor();
-                    interceptorsToInvoke.add(interceptor);
-                }
-            }
-        }
-
-        // Avoid transforming the stanza to a builder if there is no interceptor.
-        if (interceptorsToInvoke.isEmpty()) {
-            return messageOrPresence;
-        }
-
-        MPB builder = messageOrPresence.asBuilder();
-        for (Consumer<MPB> interceptor : interceptorsToInvoke) {
-            interceptor.accept(builder);
-        }
-
-        // Now that the interceptors have (probably) modified the stanza in its builder form, we need to re-assemble it.
-        messageOrPresence = builder.build();
-        return messageOrPresence;
-    }
-
     /**
      * Process interceptors. Interceptors may modify the stanza that is about to be sent.
      * Since the thread that requested to send the stanza will invoke all interceptors, it
      * is important that interceptors perform their work as soon as possible so that the
      * thread does not remain blocked for a long period.
      *
-     * @param packet the stanza that is going to be sent to the server.
-     * @return the, potentially modified stanza, after the interceptors are run.
+     * @param packet the stanza that is going to be sent to the server
      */
-    private Stanza firePacketInterceptors(Stanza packet) {
+    private void firePacketInterceptors(Stanza packet) {
         List<StanzaListener> interceptorsToInvoke = new LinkedList<>();
         synchronized (interceptors) {
             for (InterceptorWrapper interceptorWrapper : interceptors.values()) {
@@ -1327,22 +1229,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
                 LOGGER.log(Level.SEVERE, "Packet interceptor threw exception", e);
             }
         }
-
-        final Stanza stanzaAfterInterceptors;
-        if (packet instanceof Message) {
-            Message message = (Message) packet;
-            stanzaAfterInterceptors = fireMessageOrPresenceInterceptors(message, messageInterceptors);
-        }
-        else if (packet instanceof Presence) {
-            Presence presence = (Presence) packet;
-            stanzaAfterInterceptors = fireMessageOrPresenceInterceptors(presence, presenceInterceptors);
-        } else {
-            // We do not (yet) support interceptors for IQ stanzas.
-            assert packet instanceof IQ;
-            stanzaAfterInterceptors = packet;
-        }
-
-        return stanzaAfterInterceptors;
     }
 
     /**
@@ -1530,7 +1416,7 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
                     // If the IQ stanza is of type "get" or "set" with no registered IQ request handler, then answer an
                     // IQ of type 'error' with condition 'service-unavailable'.
                     final ErrorIQ errorIQ = IQ.createErrorResponse(iq, StanzaError.getBuilder(
-                                    replyCondition).build());
+                                    replyCondition));
                     // Use async sendStanza() here, since if sendStanza() would block, then some connections, e.g.
                     // XmppNioTcpConnection, would deadlock, as this operation is performed in the same thread that is
                     asyncGo(() -> {
@@ -1770,8 +1656,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
     /**
      * A wrapper class to associate a stanza filter with an interceptor.
      */
-    @Deprecated
-    // TODO: Remove once addStanzaInterceptor is gone.
     protected static class InterceptorWrapper {
 
         private final StanzaListener packetInterceptor;
@@ -1797,24 +1681,6 @@ public abstract class AbstractXMPPConnection implements XMPPConnection {
         }
     }
 
-    private static final class GenericInterceptorWrapper<MPB extends MessageOrPresenceBuilder<MP, MPB>, MP extends MessageOrPresence<MPB>> {
-        private final Consumer<MPB> stanzaInterceptor;
-        private final Predicate<MP> stanzaFilter;
-
-        private GenericInterceptorWrapper(Consumer<MPB> stanzaInterceptor, Predicate<MP> stanzaFilter) {
-            this.stanzaInterceptor = stanzaInterceptor;
-            this.stanzaFilter = stanzaFilter;
-        }
-
-        private boolean filterMatches(MP stanza) {
-            return stanzaFilter == null || stanzaFilter.test(stanza);
-        }
-
-        public Consumer<MPB> getInterceptor() {
-            return stanzaInterceptor;
-        }
-    }
-
     @Override
     public int getConnectionCounter() {
         return connectionCounterValue;

smack-core/src/main/java/org/jivesoftware/smack/AsyncButOrdered.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2018-2019 Florian Schmaus
+ * Copyright 2018 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,7 +16,6 @@
  */
 package org.jivesoftware.smack;
 
-import java.util.HashMap;
 import java.util.Map;
 import java.util.Queue;
 import java.util.WeakHashMap;
@@ -52,17 +51,9 @@ import java.util.concurrent.Executor;
  */
 public class AsyncButOrdered<K> {
 
-    /**
-     * A map with the currently pending runnables for a given key. Note that this is a weak hash map so we do not have
-     * to take care of removing the keys ourselfs from the map.
-     */
     private final Map<K, Queue<Runnable>> pendingRunnables = new WeakHashMap<>();
 
-    /**
-     * A marker map if there is an active thread for the given key. Holds the responsible handler thread if one is
-     * active, otherwise the key is non-existend in the map.
-     */
-    private final Map<K, Handler> threadActiveMap = new HashMap<>();
+    private final Map<K, Boolean> threadActiveMap = new WeakHashMap<>();
 
     private final Executor executor;
 
@@ -74,14 +65,6 @@ public class AsyncButOrdered<K> {
         this.executor = executor;
     }
 
-    private void scheduleHandler(Handler handler) {
-        if (executor == null) {
-            AbstractXMPPConnection.asyncGo(handler);
-        } else {
-            executor.execute(handler);
-        }
-    }
-
     /**
      * Invoke the given {@link Runnable} asynchronous but ordered in respect to the given key.
      *
@@ -90,7 +73,6 @@ public class AsyncButOrdered<K> {
      * @return true if a new thread was created
      */
     public boolean performAsyncButOrdered(K key, Runnable runnable) {
-        // First check if a key queue already exists, create one if not.
         Queue<Runnable> keyQueue;
         synchronized (pendingRunnables) {
             keyQueue = pendingRunnables.get(key);
@@ -100,27 +82,29 @@ public class AsyncButOrdered<K> {
             }
         }
 
-        // Then add the task to the queue.
         keyQueue.add(runnable);
 
-        // Finally check if there is already a handler working on that queue, create one if not.
-        Handler newlyCreatedHandler = null;
+        boolean newHandler;
         synchronized (threadActiveMap) {
-            if (!threadActiveMap.containsKey(key)) {
-                newlyCreatedHandler = new Handler(keyQueue, key);
+            Boolean threadActive = threadActiveMap.get(key);
+            if (threadActive == null) {
+                threadActive = false;
+                threadActiveMap.put(key, threadActive);
+            }
 
-                // Mark that there is thread active for the given key. Note that this has to be done before scheduling
-                // the handler thread.
-                threadActiveMap.put(key, newlyCreatedHandler);
+            newHandler = !threadActive;
+            if (newHandler) {
+                Handler handler = new Handler(keyQueue, key);
+                threadActiveMap.put(key, true);
+                if (executor == null) {
+                    AbstractXMPPConnection.asyncGo(handler);
+                } else {
+                    executor.execute(handler);
+                }
             }
         }
 
-        if (newlyCreatedHandler != null) {
-            scheduleHandler(newlyCreatedHandler);
-            return true;
-        }
-
-        return false;
+        return newHandler;
     }
 
     public Executor asExecutorFor(final K key) {
@@ -150,14 +134,11 @@ public class AsyncButOrdered<K> {
                     try {
                         runnable.run();
                     } catch (Throwable t) {
-                        // The run() method threw, this handler thread is going to terminate because of that. We create
-                        // a new handler to continue working on the queue while throwing the throwable so that the
-                        // executor can handle it.
-                        Handler newlyCreatedHandler = new Handler(keyQueue, key);
+                        // The run() method threw, this handler thread is going to terminate because of that. Ensure we note
+                        // that in the map.
                         synchronized (threadActiveMap) {
-                            threadActiveMap.put(key, newlyCreatedHandler);
+                            threadActiveMap.put(key, false);
                         }
-                        scheduleHandler(newlyCreatedHandler);
                         throw t;
                     }
                 }
@@ -165,7 +146,7 @@ public class AsyncButOrdered<K> {
                 synchronized (threadActiveMap) {
                     // If the queue is empty, stop this handler, otherwise continue looping.
                     if (keyQueue.isEmpty()) {
-                        threadActiveMap.remove(key);
+                        threadActiveMap.put(key, false);
                         break mainloop;
                     }
                 }

smack-core/src/main/java/org/jivesoftware/smack/ConnectionConfiguration.java

@@ -36,9 +36,6 @@ import javax.net.ssl.X509TrustManager;
 import javax.security.auth.callback.CallbackHandler;
 
 import org.jivesoftware.smack.debugger.SmackDebuggerFactory;
-import org.jivesoftware.smack.packet.id.StandardStanzaIdSource;
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-import org.jivesoftware.smack.packet.id.StanzaIdSourceFactory;
 import org.jivesoftware.smack.proxy.ProxyInfo;
 import org.jivesoftware.smack.sasl.SASLMechanism;
 import org.jivesoftware.smack.sasl.core.SASLAnonymous;
@@ -162,8 +159,6 @@ public abstract class ConnectionConfiguration {
 
     private final boolean compressionEnabled;
 
-    private final StanzaIdSourceFactory stanzaIdSourceFactory;
-
     protected ConnectionConfiguration(Builder<?, ?> builder) {
         authzid = builder.authzid;
         username = builder.username;
@@ -218,8 +213,6 @@ public abstract class ConnectionConfiguration {
 
         compressionEnabled = builder.compressionEnabled;
 
-        stanzaIdSourceFactory = builder.stanzaIdSourceFactory;
-
         // If the enabledSaslmechanisms are set, then they must not be empty
         assert enabledSaslMechanisms == null || !enabledSaslMechanisms.isEmpty();
 
@@ -575,10 +568,6 @@ public abstract class ConnectionConfiguration {
         return Collections.unmodifiableSet(enabledSaslMechanisms);
     }
 
-    StanzaIdSource constructStanzaIdSource() {
-        return stanzaIdSourceFactory.constructStanzaIdSource();
-    }
-
     /**
      * A builder for XMPP connection configurations.
      * <p>
@@ -623,7 +612,6 @@ public abstract class ConnectionConfiguration {
         private Set<String> enabledSaslMechanisms;
         private X509TrustManager customX509TrustManager;
         private boolean compressionEnabled = false;
-        private StanzaIdSourceFactory stanzaIdSourceFactory = new StandardStanzaIdSource.Factory();
 
         protected Builder() {
             if (SmackConfiguration.DEBUG) {
@@ -1146,17 +1134,6 @@ public abstract class ConnectionConfiguration {
             return getThis();
         }
 
-        /**
-         * Set the factory for stanza ID sources to use.
-         *
-         * @param stanzaIdSourceFactory the factory for stanza ID sources to use.
-         * @return a reference to this builder.
-         * @since 4.4
-         */
-        public B setStanzaIdSourceFactory(StanzaIdSourceFactory stanzaIdSourceFactory) {
-            this.stanzaIdSourceFactory = Objects.requireNonNull(stanzaIdSourceFactory);
-            return getThis();
-        }
 
         public abstract C build();
 

smack-core/src/main/java/org/jivesoftware/smack/SASLAuthentication.java

@@ -175,9 +175,9 @@ public final class SASLAuthentication {
      * @return the used SASLMechanism.
      * @throws XMPPErrorException if there was an XMPP error returned.
      * @throws SASLErrorException if a SASL protocol error was returned.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @throws InterruptedException if the calling thread was interrupted.
-     * @throws SmackSaslException if a SASL specific error occurred.
+     * @throws SmackSaslException if a SASL specific error occured.
      * @throws NotConnectedException if the XMPP connection is not connected.
      * @throws NoResponseException if there was no response from the remote entity.
      */
@@ -233,7 +233,7 @@ public final class SASLAuthentication {
      *
      * @param challenge a base64 encoded string representing the challenge.
      * @param finalChallenge true if this is the last challenge send by the server within the success stanza
-     * @throws SmackSaslException if a SASL specific error occurred.
+     * @throws SmackSaslException if a SASL specific error occured.
      * @throws NotConnectedException if the XMPP connection is not connected.
      * @throws InterruptedException if the calling thread was interrupted.
      */
@@ -252,7 +252,7 @@ public final class SASLAuthentication {
      * @throws SmackException if Smack detected an exceptional situation.
      * @throws InterruptedException if the calling thread was interrupted.
      * @throws NotConnectedException if the XMPP connection is not connected.
-     * @throws SmackSaslException if a SASL specific error occurred.
+     * @throws SmackSaslException if a SASL specific error occured.
      */
     void authenticated(Success success) throws InterruptedException, SmackSaslException, NotConnectedException {
         // RFC6120 6.3.10 "At the end of the authentication exchange, the SASL server (the XMPP

smack-core/src/main/java/org/jivesoftware/smack/SmackInitialization.java

@@ -49,6 +49,7 @@ import org.jivesoftware.smack.sasl.core.ScramSha1PlusMechanism;
 import org.jivesoftware.smack.util.CloseableUtil;
 import org.jivesoftware.smack.util.FileUtils;
 import org.jivesoftware.smack.util.PacketParserUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 
 

smack-core/src/main/java/org/jivesoftware/smack/XMPPConnection.java

@@ -27,15 +27,8 @@ import org.jivesoftware.smack.iqrequest.IQRequestHandler;
 import org.jivesoftware.smack.packet.ExtensionElement;
 import org.jivesoftware.smack.packet.FullyQualifiedElement;
 import org.jivesoftware.smack.packet.IQ;
-import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
 import org.jivesoftware.smack.packet.Nonza;
-import org.jivesoftware.smack.packet.Presence;
-import org.jivesoftware.smack.packet.PresenceBuilder;
 import org.jivesoftware.smack.packet.Stanza;
-import org.jivesoftware.smack.packet.StanzaFactory;
-import org.jivesoftware.smack.util.Consumer;
-import org.jivesoftware.smack.util.Predicate;
 
 import org.jxmpp.jid.DomainBareJid;
 import org.jxmpp.jid.EntityFullJid;
@@ -185,8 +178,6 @@ public interface XMPPConnection {
      */
     boolean isUsingCompression();
 
-    StanzaFactory getStanzaFactory();
-
     /**
      * Sends the specified stanza to the server.
      *
@@ -452,65 +443,16 @@ public interface XMPPConnection {
      *
      * @param stanzaInterceptor the stanza interceptor to notify of stanzas about to be sent.
      * @param stanzaFilter      the stanza filter to use.
-     * @deprecated use {@link #addMessageInterceptor(Consumer, Predicate)} or {@link #addPresenceInterceptor(Consumer, Predicate)} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     void addStanzaInterceptor(StanzaListener stanzaInterceptor, StanzaFilter stanzaFilter);
 
     /**
      * Removes a stanza interceptor.
      *
      * @param stanzaInterceptor the stanza interceptor to remove.
-     * @deprecated use {@link #removeMessageInterceptor(Consumer)} or {@link #removePresenceInterceptor(Consumer)} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     void removeStanzaInterceptor(StanzaListener stanzaInterceptor);
 
-    /**
-     * Registers a stanza interceptor with this connection. The interceptor will be
-     * invoked every time a stanza is about to be sent by this connection. Interceptors
-     * may modify the stanza to be sent. A stanza filter determines which stanzas
-     * will be delivered to the interceptor.
-     *
-     * <p>
-     * NOTE: For a similar functionality on incoming stanzas, see {@link #addAsyncStanzaListener(StanzaListener, StanzaFilter)}.
-     * </p>
-     *
-     * @param messageInterceptor the stanza interceptor to notify of stanzas about to be sent.
-     * @param messageFilter      the stanza filter to use.
-     */
-    void addMessageInterceptor(Consumer<MessageBuilder> messageInterceptor, Predicate<Message> messageFilter);
-
-    /**
-     * Removes a message interceptor.
-     *
-     * @param messageInterceptor the message interceptor to remove.
-     */
-    void removeMessageInterceptor(Consumer<MessageBuilder> messageInterceptor);
-
-    /**
-     * Registers a stanza interceptor with this connection. The interceptor will be
-     * invoked every time a stanza is about to be sent by this connection. Interceptors
-     * may modify the stanza to be sent. A stanza filter determines which stanzas
-     * will be delivered to the interceptor.
-     *
-     * <p>
-     * NOTE: For a similar functionality on incoming stanzas, see {@link #addAsyncStanzaListener(StanzaListener, StanzaFilter)}.
-     * </p>
-     *
-     * @param presenceInterceptor the stanza interceptor to notify of stanzas about to be sent.
-     * @param presenceFilter      the stanza filter to use.
-     */
-    void addPresenceInterceptor(Consumer<PresenceBuilder> presenceInterceptor, Predicate<Presence> presenceFilter);
-
-    /**
-     * Removes a presence interceptor.
-     *
-     * @param presenceInterceptor the stanza interceptor to remove.
-     */
-    void removePresenceInterceptor(Consumer<PresenceBuilder> presenceInterceptor);
     /**
      * Returns the current value of the reply timeout in milliseconds for request for this
      * XMPPConnection instance.

smack-core/src/main/java/org/jivesoftware/smack/compress/provider/CompressedProvider.java

@@ -19,6 +19,7 @@ package org.jivesoftware.smack.compress.provider;
 import org.jivesoftware.smack.compress.packet.Compressed;
 import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.provider.NonzaProvider;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 
 public final class CompressedProvider extends NonzaProvider<Compressed> {

smack-core/src/main/java/org/jivesoftware/smack/compress/provider/FailureProvider.java

@@ -26,6 +26,7 @@ import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.parsing.SmackParsingException;
 import org.jivesoftware.smack.provider.NonzaProvider;
 import org.jivesoftware.smack.util.PacketParserUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
 
@@ -61,7 +62,8 @@ public final class FailureProvider extends NonzaProvider<Failure> {
                 case StreamOpen.SERVER_NAMESPACE:
                     switch (name) {
                         case StanzaError.ERROR:
-                            stanzaError = PacketParserUtils.parseError(parser, failureXmlEnvironment);
+                            StanzaError.Builder stanzaErrorBuilder = PacketParserUtils.parseError(parser, failureXmlEnvironment);
+                            stanzaError = stanzaErrorBuilder.build();
                             break;
                         default:
                             LOGGER.warning("Unknown element in " + namespace + ": " + name);

smack-core/src/main/java/org/jivesoftware/smack/compression/Java7ZlibInputOutputStream.java

@@ -76,7 +76,7 @@ public class Java7ZlibInputOutputStream extends XMPPInputOutputStream {
              * byte without blocking, 0 means that the system is known to block for more input.
              *
              * @return 0 if no data is available, 1 otherwise
-             * @throws IOException if an I/O error occurred.
+             * @throws IOException if an I/O error occured.
              */
             @Override
             public int available() throws IOException {

smack-core/src/main/java/org/jivesoftware/smack/filter/StanzaFilter.java

@@ -18,7 +18,6 @@
 package org.jivesoftware.smack.filter;
 
 import org.jivesoftware.smack.packet.Stanza;
-import org.jivesoftware.smack.util.Predicate;
 
 /**
  * Defines a way to filter stanzas for particular attributes. Stanza filters are used when
@@ -52,7 +51,7 @@ import org.jivesoftware.smack.util.Predicate;
  * @see org.jivesoftware.smack.StanzaListener
  * @author Matt Tucker
  */
-public interface StanzaFilter extends Predicate<Stanza> {
+public interface StanzaFilter {
 
     /**
      * Tests whether or not the specified stanza should pass the filter.
@@ -61,9 +60,4 @@ public interface StanzaFilter extends Predicate<Stanza> {
      * @return true if and only if <code>stanza</code> passes the filter.
      */
     boolean accept(Stanza stanza);
-
-    @Override
-    default boolean test(Stanza stanza) {
-        return accept(stanza);
-    }
 }

smack-core/src/main/java/org/jivesoftware/smack/packet/AbstractIqBuilder.java

@@ -1,69 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-import org.jivesoftware.smack.util.ToStringUtil;
-
-public abstract class AbstractIqBuilder<IB extends AbstractIqBuilder<IB>> extends StanzaBuilder<IB> implements IqView {
-
-    protected IQ.Type type = IQ.Type.get;
-
-    AbstractIqBuilder(AbstractIqBuilder<?> other) {
-        super(other);
-        type = other.type;
-    }
-
-    AbstractIqBuilder(StanzaIdSource stanzaIdSource) {
-        super(stanzaIdSource);
-    }
-
-    AbstractIqBuilder(String stanzaId) {
-        super(stanzaId);
-    }
-
-    public static IqData createResponse(IqView request) {
-        return createResponse(request, IQ.ResponseType.result);
-    }
-
-    public static IqData createErrorResponse(IqView request) {
-        return createResponse(request, IQ.ResponseType.error);
-    }
-
-    protected static IqData createResponse(IqView request, IQ.ResponseType responseType) {
-        if (!(request.getType() == IQ.Type.get || request.getType() == IQ.Type.set)) {
-            throw new IllegalArgumentException("IQ request must be of type 'set' or 'get'. Original IQ: " + request);
-        }
-
-        IqData commonResponseIqData = buildResponse(request, s -> {
-            return StanzaBuilder.buildIqData(s);
-        });
-        commonResponseIqData.ofType(responseType.getType());
-
-        return commonResponseIqData;
-    }
-
-    @Override
-    protected final void addStanzaSpecificAttributes(ToStringUtil.Builder builder) {
-        builder.addValue("type", getType());
-    }
-
-    @Override
-    public final IQ.Type getType() {
-        return type;
-    }
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/EmptyResultIQ.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2014-2019 Florian Schmaus
+ * Copyright © 2014 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,18 +18,14 @@ package org.jivesoftware.smack.packet;
 
 public class EmptyResultIQ extends IQ {
 
-    EmptyResultIQ(IqData iqBuilder) {
-        super(iqBuilder, null, null);
-    }
-
-    // TODO: Deprecate when stanza builder and parsing logic is ready.
     public EmptyResultIQ() {
         super(null, null);
         setType(IQ.Type.result);
     }
 
     public EmptyResultIQ(IQ request) {
-        this(AbstractIqBuilder.createResponse(request));
+        this();
+        initializeAsResultFor(request);
     }
 
     @Override

smack-core/src/main/java/org/jivesoftware/smack/packet/ErrorIQ.java

@@ -27,13 +27,13 @@ public class ErrorIQ extends SimpleIQ {
      * <p>
      * According to RFC 6120 § 8.3.1 "4. An error stanza MUST contain an &lt;error/&gt; child element.", so the xmppError argument is mandatory.
      * </p>
-     * @param stanzaError the stanzaError (required).
+     * @param xmppErrorBuilder the XMPPError builder (required).
      */
-    public ErrorIQ(StanzaError stanzaError) {
+    public ErrorIQ(StanzaError.Builder xmppErrorBuilder) {
         super(ELEMENT, null);
-        Objects.requireNonNull(stanzaError, "stanzaError must not be null");
+        Objects.requireNonNull(xmppErrorBuilder, "xmppErrorBuilder must not be null");
         setType(IQ.Type.error);
-        setError(stanzaError);
+        setError(xmppErrorBuilder);
     }
 
 }

smack-core/src/main/java/org/jivesoftware/smack/packet/FullyQualifiedElement.java

@@ -18,7 +18,7 @@ package org.jivesoftware.smack.packet;
 
 import javax.xml.namespace.QName;
 
-public interface FullyQualifiedElement extends NamedElement, XmlLangElement {
+public interface FullyQualifiedElement extends NamedElement {
 
     /**
      * Returns the root element XML namespace.
@@ -33,7 +33,11 @@ public interface FullyQualifiedElement extends NamedElement, XmlLangElement {
         return new QName(namespaceURI, localPart);
     }
 
-    @Override
+    /**
+     * Returns the xml:lang of this XML element, or null if one has not been set.
+     *
+     * @return the xml:lang of this XML element, or null.
+     */
     default String getLanguage() {
         return null;
     }

smack-core/src/main/java/org/jivesoftware/smack/packet/IQ.java

@@ -42,7 +42,7 @@ import org.jivesoftware.smack.util.XmlStringBuilder;
  *
  * @author Matt Tucker
  */
-public abstract class IQ extends Stanza implements IqView {
+public abstract class IQ extends Stanza {
 
     // Don't name this field 'ELEMENT'. When it comes to IQ, ELEMENT is the child element!
     public static final String IQ_ELEMENT = "iq";
@@ -54,7 +54,7 @@ public abstract class IQ extends Stanza implements IqView {
 
     private Type type = Type.get;
 
-    protected IQ(IQ iq) {
+    public IQ(IQ iq) {
         super(iq);
         type = iq.getType();
         this.childElementName = iq.childElementName;
@@ -62,16 +62,7 @@ public abstract class IQ extends Stanza implements IqView {
         this.childElementQName = iq.childElementQName;
     }
 
-    // TODO: Deprecate when stanza builder is ready.
     protected IQ(String childElementName, String childElementNamespace) {
-        this(IqData.EMPTY, childElementName, childElementNamespace);
-    }
-
-    protected IQ(AbstractIqBuilder<?> iqBuilder, String childElementName, String childElementNamespace) {
-        super(iqBuilder);
-
-        type = iqBuilder.type;
-
         this.childElementName = childElementName;
         this.childElementNamespace = childElementNamespace;
         if (childElementName == null) {
@@ -81,7 +72,11 @@ public abstract class IQ extends Stanza implements IqView {
         }
     }
 
-    @Override
+    /**
+     * Returns the type of the IQ packet.
+     *
+     * @return the type of the IQ packet.
+     */
     public Type getType() {
         return type;
     }
@@ -95,7 +90,6 @@ public abstract class IQ extends Stanza implements IqView {
      *
      * @param type the type of the IQ packet.
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
     public void setType(Type type) {
         this.type = Objects.requireNonNull(type, "type must not be null");
     }
@@ -266,6 +260,19 @@ public abstract class IQ extends Stanza implements IqView {
      */
     protected abstract IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml);
 
+    protected final void initializeAsResultFor(IQ request) {
+        assert this != request;
+
+        if (!(request.getType() == Type.get || request.getType() == Type.set)) {
+            throw new IllegalArgumentException(
+                    "IQ must be of type 'set' or 'get'. Original IQ: " + request.toXML());
+        }
+        setStanzaId(request.getStanzaId());
+        setFrom(request.getTo());
+        setTo(request.getFrom());
+        setType(Type.result);
+    }
+
     /**
      * Convenience method to create a new empty {@link Type#result IQ.Type.result}
      * IQ based on a {@link Type#get IQ.Type.get} or {@link Type#set IQ.Type.set}
@@ -304,7 +311,7 @@ public abstract class IQ extends Stanza implements IqView {
      *      {@link Type#get IQ.Type.get} or {@link Type#set IQ.Type.set}.
      * @return a new {@link Type#error IQ.Type.error} IQ based on the originating IQ.
      */
-    public static ErrorIQ createErrorResponse(final IQ request, final StanzaError error) {
+    public static ErrorIQ createErrorResponse(final IQ request, final StanzaError.Builder error) {
         if (!request.isRequestIQ()) {
             throw new IllegalArgumentException(
                     "IQ must be of type 'set' or 'get'. Original IQ: " + request.toXML());
@@ -314,25 +321,35 @@ public abstract class IQ extends Stanza implements IqView {
         result.setFrom(request.getTo());
         result.setTo(request.getFrom());
 
+        error.setStanza(result);
+
         return result;
     }
 
-    /**
-     * Deprecated.
-     *
-     * @param request the request.
-     * @param error the error.
-     * @return an error IQ.
-     * @deprecated use {@link #createErrorResponse(IQ, StanzaError)} instead.
-     */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
-    public static ErrorIQ createErrorResponse(final IQ request, final StanzaError.Builder error) {
-        return createErrorResponse(request, error.build());
+    public static ErrorIQ createErrorResponse(final IQ request, final StanzaError.Condition condition) {
+        return createErrorResponse(request, StanzaError.getBuilder(condition));
     }
 
-    public static ErrorIQ createErrorResponse(final IQ request, final StanzaError.Condition condition) {
-        return createErrorResponse(request, StanzaError.getBuilder(condition).build());
+    /**
+     * Convenience method to create a new {@link Type#error IQ.Type.error} IQ
+     * based on a {@link Type#get IQ.Type.get} or {@link Type#set IQ.Type.set}
+     * IQ. The new stanza will be initialized with:<ul>
+     *      <li>The sender set to the recipient of the originating IQ.
+     *      <li>The recipient set to the sender of the originating IQ.
+     *      <li>The type set to {@link Type#error IQ.Type.error}.
+     *      <li>The id set to the id of the originating IQ.
+     *      <li>The child element contained in the associated originating IQ.
+     *      <li>The provided {@link StanzaError XMPPError}.
+     * </ul>
+     *
+     * @param request the {@link Type#get IQ.Type.get} or {@link Type#set IQ.Type.set} IQ packet.
+     * @param error the error to associate with the created IQ packet.
+     * @throws IllegalArgumentException if the IQ stanza does not have a type of
+     *      {@link Type#get IQ.Type.get} or {@link Type#set IQ.Type.set}.
+     * @return a new {@link Type#error IQ.Type.error} IQ based on the originating IQ.
+     */
+    public static ErrorIQ createErrorResponse(final IQ request, final StanzaError error) {
+        return createErrorResponse(request, StanzaError.getBuilder(error));
     }
 
     /**
@@ -375,25 +392,6 @@ public abstract class IQ extends Stanza implements IqView {
         }
     }
 
-    public enum ResponseType {
-
-        result(Type.result),
-
-        error(Type.error),
-
-        ;
-
-        final Type type;
-
-        ResponseType(Type type) {
-            this.type = type;
-        }
-
-        Type getType() {
-            return type;
-        }
-    }
-
     public static class IQChildElementXmlStringBuilder extends XmlStringBuilder {
         private final String element;
 

smack-core/src/main/java/org/jivesoftware/smack/packet/IqBuilder.java

@@ -1,44 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import org.jivesoftware.smack.XMPPConnection;
-import org.jivesoftware.smack.util.Objects;
-
-public abstract class IqBuilder<IB extends IqBuilder<IB, I>, I extends IQ>
-                extends AbstractIqBuilder<IB> {
-
-    protected IqBuilder(AbstractIqBuilder<?> other) {
-        super(other);
-    }
-
-    protected IqBuilder(XMPPConnection connection) {
-        super(connection.getStanzaFactory().getStanzaIdSource());
-    }
-
-    protected IqBuilder(String stanzaId) {
-        super(stanzaId);
-    }
-
-    public IB ofType(IQ.Type type) {
-        this.type = Objects.requireNonNull(type);
-        return getThis();
-    }
-
-    public abstract I build();
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/IqData.java

@@ -1,44 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import org.jivesoftware.smack.packet.id.StandardStanzaIdSource;
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-import org.jivesoftware.smack.util.Objects;
-
-public final class IqData extends AbstractIqBuilder<IqData> {
-
-    static final IqData EMPTY = new IqData(StandardStanzaIdSource.DEFAULT);
-
-    IqData(StanzaIdSource stanzaIdSource) {
-        super(stanzaIdSource);
-    }
-
-    IqData(String stanzaId) {
-        super(stanzaId);
-    }
-
-    public IqData ofType(IQ.Type type) {
-        this.type = Objects.requireNonNull(type);
-        return getThis();
-    }
-
-    @Override
-    public IqData getThis() {
-        return this;
-    }
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/IqView.java

@@ -1,28 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-public interface IqView extends StanzaView {
-
-    /**
-     * Returns the type of the IQ packet.
-     *
-     * @return the type of the IQ packet.
-     */
-    IQ.Type getType();
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/Message.java

@@ -24,8 +24,6 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Set;
 
-import javax.xml.namespace.QName;
-
 import org.jivesoftware.smack.util.EqualsUtil;
 import org.jivesoftware.smack.util.HashCode;
 import org.jivesoftware.smack.util.Objects;
@@ -60,8 +58,7 @@ import org.jxmpp.stringprep.XmppStringprepException;
  *
  * @author Matt Tucker
  */
-public final class Message extends MessageOrPresence<MessageBuilder>
-                implements MessageView, TypedCloneable<Message> {
+public final class Message extends Stanza implements TypedCloneable<Message> {
 
     public static final String ELEMENT = "message";
     public static final String BODY = "body";
@@ -69,12 +66,11 @@ public final class Message extends MessageOrPresence<MessageBuilder>
     private Type type;
     private String thread = null;
 
+    private final Set<Subject> subjects = new HashSet<Subject>();
+
     /**
      * Creates a new, "normal" message.
-     * @deprecated use {@link StanzaBuilder}, preferable via {@link StanzaFactory}, instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Message() {
     }
 
@@ -82,10 +78,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * Creates a new "normal" message to the specified recipient.
      *
      * @param to the recipient of the message.
-     * @deprecated use {@link StanzaBuilder}, preferable via {@link StanzaFactory}, instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Message(Jid to) {
         setTo(to);
     }
@@ -95,10 +88,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      *
      * @param to the user to send the message to.
      * @param type the message type.
-     * @deprecated use {@link StanzaBuilder}, preferable via {@link StanzaFactory}, instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Message(Jid to, Type type) {
         this(to);
         setType(type);
@@ -109,10 +99,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      *
      * @param to the user to send the message to.
      * @param body the body of the message.
-     * @deprecated use {@link StanzaBuilder}, preferable via {@link StanzaFactory}, instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Message(Jid to, String body) {
         this(to);
         setBody(body);
@@ -124,10 +111,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @param to the user to send the message to.
      * @param body the body of the message.
      * @throws XmppStringprepException if 'to' is not a valid XMPP address.
-     * @deprecated use {@link StanzaBuilder}, preferable via {@link StanzaFactory}, instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Message(String to, String body) throws XmppStringprepException {
         this(JidCreate.from(to), body);
     }
@@ -138,21 +122,12 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @param to TODO javadoc me please
      * @param extensionElement TODO javadoc me please
      * @since 4.2
-     * @deprecated use {@link StanzaBuilder}, preferable via {@link StanzaFactory}, instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Message(Jid to, ExtensionElement extensionElement) {
         this(to);
         addExtension(extensionElement);
     }
 
-    Message(MessageBuilder messageBuilder) {
-        super(messageBuilder);
-        type = messageBuilder.type;
-        thread = messageBuilder.thread;
-    }
-
     /**
      * Copy constructor.
      * <p>
@@ -166,9 +141,15 @@ public final class Message extends MessageOrPresence<MessageBuilder>
         super(other);
         this.type = other.type;
         this.thread = other.thread;
+        this.subjects.addAll(other.subjects);
     }
 
-    @Override
+    /**
+     * Returns the type of the message. If no type has been set this method will return {@link
+     * org.jivesoftware.smack.packet.Message.Type#normal}.
+     *
+     * @return the type of the message.
+     */
     public Type getType() {
         if (type == null) {
             return Type.normal;
@@ -180,10 +161,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * Sets the type of the message.
      *
      * @param type the type of the message.
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public void setType(Type type) {
         this.type = type;
     }
@@ -217,9 +195,8 @@ public final class Message extends MessageOrPresence<MessageBuilder>
 
     private Subject getMessageSubject(String language) {
         language = determineLanguage(language);
-        for (Subject subject : getSubjects()) {
-            if (Objects.equals(language, subject.language)
-                            || (subject.language == null && Objects.equals(this.language, language))) {
+        for (Subject subject : subjects) {
+            if (Objects.equals(language, subject.language)) {
                 return subject;
             }
         }
@@ -233,12 +210,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @return a collection of all subjects in this message.
      */
     public Set<Subject> getSubjects() {
-        List<Subject> subjectList = getExtensions(Subject.class);
-
-        Set<Subject> subjects = new HashSet<>(subjectList.size());
-        subjects.addAll(subjectList);
-
-        return subjects;
+        return Collections.unmodifiableSet(subjects);
     }
 
     /**
@@ -246,10 +218,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * message contents.
      *
      * @param subject the subject of the message.
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public void setSubject(String subject) {
         if (subject == null) {
             removeSubject(""); // use empty string because #removeSubject(null) is ambiguous
@@ -266,20 +235,10 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @return the new {@link org.jivesoftware.smack.packet.Message.Subject}
      * @throws NullPointerException if the subject is null, a null pointer exception is thrown
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public Subject addSubject(String language, String subject) {
         language = determineLanguage(language);
-
-        List<Subject> currentSubjects = getExtensions(Subject.class);
-        for (Subject currentSubject : currentSubjects) {
-            if (language.equals(currentSubject.getLanguage())) {
-                throw new IllegalArgumentException("Subject with the language " + language + " already exists");
-            }
-        }
-
         Subject messageSubject = new Subject(language, subject);
-        addExtension(messageSubject);
+        subjects.add(messageSubject);
         return messageSubject;
     }
 
@@ -289,13 +248,11 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @param language the language of the subject which is to be removed
      * @return true if a subject was removed and false if it was not.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public boolean removeSubject(String language) {
         language = determineLanguage(language);
-        for (Subject subject : getExtensions(Subject.class)) {
+        for (Subject subject : subjects) {
             if (language.equals(subject.language)) {
-                return removeSubject(subject);
+                return subjects.remove(subject);
             }
         }
         return false;
@@ -307,10 +264,8 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @param subject the subject being removed from the message.
      * @return true if the subject was successfully removed and false if it was not.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public boolean removeSubject(Subject subject) {
-        return removeExtension(subject) != null;
+        return subjects.remove(subject);
     }
 
     /**
@@ -321,7 +276,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
     public List<String> getSubjectLanguages() {
         Subject defaultSubject = getMessageSubject(null);
         List<String> languages = new ArrayList<String>();
-        for (Subject subject : getExtensions(Subject.class)) {
+        for (Subject subject : subjects) {
             if (!subject.equals(defaultSubject)) {
                 languages.add(subject.language);
             }
@@ -390,10 +345,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @param body the body of the message.
      * @see #setBody(String)
      * @since 4.2
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public void setBody(CharSequence body) {
         String bodyString;
         if (body != null) {
@@ -408,10 +360,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * Sets the body of the message. The body is the main message contents.
      *
      * @param body the body of the message.
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public void setBody(String body) {
         if (body == null) {
             removeBody(""); // use empty string because #removeBody(null) is ambiguous
@@ -428,10 +377,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @return the new {@link org.jivesoftware.smack.packet.Message.Body}
      * @throws NullPointerException if the body is null, a null pointer exception is thrown
      * @since 3.0.2
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public Body addBody(String language, String body) {
         language = determineLanguage(language);
 
@@ -447,10 +393,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      *
      * @param language the language of the body which is to be removed
      * @return true if a body was removed and false if it was not.
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public boolean removeBody(String language) {
         language = determineLanguage(language);
         for (Body body : getBodies()) {
@@ -469,10 +412,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * @param body the body being removed from the message.
      * @return true if the body was successfully removed and false if it was not.
      * @since 3.0.2
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public boolean removeBody(Body body) {
         ExtensionElement removedElement = removeExtension(body);
         return removedElement != null;
@@ -510,10 +450,7 @@ public final class Message extends MessageOrPresence<MessageBuilder>
      * of "chat" messages.
      *
      * @param thread the thread id of the message.
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public void setThread(String thread) {
         this.thread = thread;
     }
@@ -535,11 +472,6 @@ public final class Message extends MessageOrPresence<MessageBuilder>
         return ELEMENT;
     }
 
-    @Override
-    public MessageBuilder asBuilder() {
-        return StanzaBuilder.buildMessageFrom(this, getStanzaId());
-    }
-
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();
@@ -559,6 +491,18 @@ public final class Message extends MessageOrPresence<MessageBuilder>
         buf.optAttribute("type", type);
         buf.rightAngleBracket();
 
+        // Add the subject in the default language
+        Subject defaultSubject = getMessageSubject(null);
+        if (defaultSubject != null) {
+            buf.element("subject", defaultSubject.subject);
+        }
+        // Add the subject in other languages
+        for (Subject subject : getSubjects()) {
+            // Skip the default language
+            if (subject.equals(defaultSubject))
+                continue;
+            buf.append(subject);
+        }
         buf.optElement("thread", thread);
         // Append the error subpacket if the message type is an error.
         if (type == Type.error) {
@@ -593,12 +537,10 @@ public final class Message extends MessageOrPresence<MessageBuilder>
         public static final String ELEMENT = "subject";
         public static final String NAMESPACE = StreamOpen.CLIENT_NAMESPACE;
 
-        public static final QName QNAME = new QName(NAMESPACE, ELEMENT);
-
         private final String subject;
         private final String language;
 
-        public Subject(String language, String subject) {
+        private Subject(String language, String subject) {
             if (subject == null) {
                 throw new NullPointerException("Subject cannot be null.");
             }
@@ -666,7 +608,6 @@ public final class Message extends MessageOrPresence<MessageBuilder>
 
         public static final String ELEMENT = "body";
         public static final String NAMESPACE = StreamOpen.CLIENT_NAMESPACE;
-        public static final QName QNAME = new QName(NAMESPACE, ELEMENT);
 
         enum BodyElementNamespace {
             client(StreamOpen.CLIENT_NAMESPACE),

smack-core/src/main/java/org/jivesoftware/smack/packet/MessageBuilder.java

@@ -1,165 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import org.jivesoftware.smack.packet.Message.Body;
-import org.jivesoftware.smack.packet.Message.Subject;
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-import org.jivesoftware.smack.util.StringUtils;
-import org.jivesoftware.smack.util.ToStringUtil;
-
-public final class MessageBuilder extends MessageOrPresenceBuilder<Message, MessageBuilder> implements MessageView {
-    static final MessageBuilder EMPTY = new MessageBuilder(() -> {
-        return null;
-    });
-
-    Message.Type type;
-
-    String thread;
-
-    MessageBuilder(Message message, String stanzaId) {
-        super(message, stanzaId);
-        copyFromMessage(message);
-    }
-
-    MessageBuilder(Message message, StanzaIdSource stanzaIdSource) {
-        super(message, stanzaIdSource);
-        copyFromMessage(message);
-    }
-
-    MessageBuilder(StanzaIdSource stanzaIdSource) {
-        super(stanzaIdSource);
-    }
-
-    MessageBuilder(String stanzaId) {
-        super(stanzaId);
-    }
-
-    private void copyFromMessage(Message message) {
-        type = message.getType();
-        thread = message.getThread();
-    }
-
-    @Override
-    protected void addStanzaSpecificAttributes(ToStringUtil.Builder builder) {
-        builder.addValue("type", type)
-               .addValue("thread", thread)
-               ;
-    }
-
-    public MessageBuilder ofType(Message.Type type) {
-        this.type = type;
-        return getThis();
-    }
-
-    public MessageBuilder setThread(String thread) {
-        this.thread = thread;
-        return getThis();
-    }
-
-    /**
-     * Sets the subject of the message. The subject is a short description of
-     * message contents.
-     *
-     * @param subject the subject of the message.
-     * @return a reference to this builder.
-     */
-    public MessageBuilder setSubject(String subject) {
-        return addSubject(null, subject);
-    }
-
-    /**
-     * Adds a subject with a corresponding language.
-     *
-     * @param language the language of the subject being added.
-     * @param subject the subject being added to the message.
-     * @return a reference to this builder.
-     * @throws NullPointerException if the subject is null.
-     */
-    public MessageBuilder addSubject(String language, String subject) {
-        language = StringUtils.requireNullOrNotEmpty(language, "language must be null or not empty");
-
-        for (Subject currentSubject : getExtensions(Subject.class)) {
-            if (StringUtils.nullSafeCharSequenceEquals(language, currentSubject.getLanguage())) {
-                throw new IllegalArgumentException("Subject with the language " + language + " already exists");
-            }
-        }
-
-        Subject messageSubject = new Subject(language, subject);
-        addExtension(messageSubject);
-
-        return this;
-    }
-
-    /**
-     * Sets the body of the message.
-     *
-     * @param body the body of the message.
-     * @return a reference to this builder.
-     * @see #setBody(String)
-     */
-    public MessageBuilder setBody(CharSequence body) {
-        return setBody(body.toString());
-    }
-
-    /**
-     * Sets the body of the message. The body is the main message contents.
-     *
-     * @param body the body of the message.
-     * @return a reference to this builder.
-     */
-    public MessageBuilder setBody(String body) {
-        return addBody(null, body);
-    }
-
-    /**
-     * Adds a body with a corresponding language.
-     *
-     * @param language the language of the body being added.
-     * @param body the body being added to the message.
-     * @return a reference to this builder.
-     */
-    public MessageBuilder addBody(String language, String body) {
-        language = StringUtils.requireNullOrNotEmpty(language, "language must be null or not empty");
-
-        for (Body currentBody : getExtensions(Body.class)) {
-            if (StringUtils.nullSafeCharSequenceEquals(language, currentBody.getLanguage())) {
-                throw new IllegalArgumentException("Bodyt with the language " + language + " already exists");
-            }
-        }
-
-        Body messageBody = new Body(language, body);
-        addExtension(messageBody);
-
-        return this;
-    }
-
-    @Override
-    public MessageBuilder getThis() {
-        return this;
-    }
-
-    @Override
-    public Message build() {
-        return new Message(this);
-    }
-
-    @Override
-    public Message.Type getType() {
-        return type;
-    }
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/MessageOrPresence.java

@@ -1,36 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-public abstract class MessageOrPresence<MPB extends MessageOrPresenceBuilder<?, ?>> extends Stanza {
-
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
-    protected MessageOrPresence() {
-    }
-
-    protected MessageOrPresence(StanzaBuilder<?> stanzaBuilder) {
-        super(stanzaBuilder);
-    }
-
-    protected MessageOrPresence(Stanza other) {
-        super(other);
-    }
-
-    public abstract MPB asBuilder();
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/MessageOrPresenceBuilder.java

@@ -1,42 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-
-public abstract class MessageOrPresenceBuilder<MP extends MessageOrPresence<? extends MessageOrPresenceBuilder<MP, SB>>, SB extends StanzaBuilder<SB>>
-                extends StanzaBuilder<SB> {
-
-    protected MessageOrPresenceBuilder(Stanza stanza, StanzaIdSource stanzaIdSource) {
-        super(stanza, stanzaIdSource);
-    }
-
-    protected MessageOrPresenceBuilder(Stanza stanza, String stanzaId) {
-        super(stanza, stanzaId);
-    }
-
-    protected MessageOrPresenceBuilder(StanzaIdSource stanzaIdSource) {
-        super(stanzaIdSource);
-    }
-
-    protected MessageOrPresenceBuilder(String stanzaId) {
-        super(stanzaId);
-    }
-
-    public abstract MP build();
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/MessageView.java

@@ -1,29 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-public interface MessageView extends StanzaView {
-
-    /**
-     * Returns the type of the message. If no type has been set this method will return {@link
-     * org.jivesoftware.smack.packet.Message.Type#normal}.
-     *
-     * @return the type of the message.
-     */
-    Message.Type getType();
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/Presence.java

@@ -19,8 +19,7 @@ package org.jivesoftware.smack.packet;
 
 import java.util.Locale;
 
-import javax.net.SocketFactory;
-
+import org.jivesoftware.smack.packet.id.StanzaIdUtil;
 import org.jivesoftware.smack.util.Objects;
 import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smack.util.TypedCloneable;
@@ -61,8 +60,7 @@ import org.jxmpp.jid.Jid;
  *
  * @author Matt Tucker
  */
-public final class Presence extends MessageOrPresence<PresenceBuilder>
-                implements PresenceView, TypedCloneable<Presence> {
+public final class Presence extends Stanza implements TypedCloneable<Presence> {
 
     public static final String ELEMENT = "presence";
 
@@ -83,10 +81,7 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      * Creates a new presence update. Status, priority, and mode are left un-set.
      *
      * @param type the type.
-     * @deprecated use {@link StanzaBuilder} or {@link SocketFactory} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Presence(Type type) {
         // Ensure that the stanza ID is set by calling super().
         super();
@@ -99,10 +94,7 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      * @param to the recipient.
      * @param type the type.
      * @since 4.2
-     * @deprecated use {@link StanzaBuilder} or {@link SocketFactory} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Presence(Jid to, Type type) {
         this(type);
         setTo(to);
@@ -115,10 +107,7 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      * @param status a text message describing the presence update.
      * @param priority the priority of this presence update.
      * @param mode the mode type for this presence update.
-     * @deprecated use {@link StanzaBuilder} or {@link SocketFactory} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public Presence(Type type, String status, int priority, Mode mode) {
         // Ensure that the stanza ID is set by calling super().
         super();
@@ -128,14 +117,6 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
         setMode(mode);
     }
 
-    Presence(PresenceBuilder presenceBuilder) {
-        super(presenceBuilder);
-        type = presenceBuilder.type;
-        status = presenceBuilder.status;
-        priority = presenceBuilder.priority;
-        mode = presenceBuilder.mode;
-    }
-
     /**
      * Copy constructor.
      * <p>
@@ -182,7 +163,11 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
         return type == Type.available && (mode == Mode.away || mode == Mode.xa || mode == Mode.dnd);
     }
 
-    @Override
+    /**
+     * Returns the type of this presence packet.
+     *
+     * @return the type of the presence packet.
+     */
     public Type getType() {
         return type;
     }
@@ -191,15 +176,18 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      * Sets the type of the presence packet.
      *
      * @param type the type of the presence packet.
-     * @deprecated use {@link StanzaBuilder} or {@link SocketFactory} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public void setType(Type type) {
         this.type = Objects.requireNonNull(type, "Type cannot be null");
     }
 
-    @Override
+    /**
+     * Returns the status message of the presence update, or <code>null</code> if there
+     * is not a status. The status is free-form text describing a user's presence
+     * (i.e., "gone to lunch").
+     *
+     * @return the status message.
+     */
     public String getStatus() {
         return status;
     }
@@ -209,21 +197,18 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      * describing a user's presence (i.e., "gone to lunch").
      *
      * @param status the status message.
-     * @deprecated use {@link StanzaBuilder} or {@link SocketFactory} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public void setStatus(String status) {
         this.status = status;
     }
 
-    @Override
+    /**
+     * Returns the priority of the presence.
+     *
+     * @return the priority.
+     * @see <a href="https://tools.ietf.org/html/rfc6121#section-4.7.2.3">RFC 6121 § 4.7.2.3. Priority Element</a>
+     */
     public int getPriority() {
-        return getPriorityByte();
-    }
-
-    @Override
-    public byte getPriorityByte() {
         if (priority == null) {
             return 0;
         }
@@ -236,10 +221,7 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      * @param priority the priority of the presence.
      * @throws IllegalArgumentException if the priority is outside the valid range.
      * @see <a href="https://tools.ietf.org/html/rfc6121#section-4.7.2.3">RFC 6121 § 4.7.2.3. Priority Element</a>
-     * @deprecated use {@link StanzaBuilder} or {@link SocketFactory} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public void setPriority(int priority) {
         if (priority < -128 || priority > 127) {
             throw new IllegalArgumentException("Priority value " + priority +
@@ -252,7 +234,11 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
         this.priority = priority;
     }
 
-    @Override
+    /**
+     * Returns the mode of the presence update.
+     *
+     * @return the mode.
+     */
     public Mode getMode() {
         if (mode == null) {
             return Mode.available;
@@ -265,10 +251,7 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      * to be the same thing as {@link Presence.Mode#available}.
      *
      * @param mode the mode.
-     * @deprecated use {@link StanzaBuilder} or {@link SocketFactory} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public void setMode(Mode mode) {
         this.mode = mode;
     }
@@ -278,11 +261,6 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
         return ELEMENT;
     }
 
-    @Override
-    public PresenceBuilder asBuilder() {
-        return StanzaBuilder.buildPresenceFrom(this, getStanzaId());
-    }
-
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();
@@ -348,7 +326,7 @@ public final class Presence extends MessageOrPresence<PresenceBuilder>
      */
     public Presence cloneWithNewId() {
         Presence clone = clone();
-        clone.setNewStanzaId();
+        clone.setStanzaId(StanzaIdUtil.newStanzaId());
         return clone;
     }
 

smack-core/src/main/java/org/jivesoftware/smack/packet/PresenceBuilder.java

@@ -1,141 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import org.jivesoftware.smack.packet.Presence.Mode;
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-import org.jivesoftware.smack.util.Objects;
-import org.jivesoftware.smack.util.ToStringUtil;
-
-public final class PresenceBuilder extends MessageOrPresenceBuilder<Presence, PresenceBuilder> implements PresenceView {
-    static final PresenceBuilder EMPTY = new PresenceBuilder(() -> {
-        return null;
-    });
-
-    Presence.Type type = Presence.Type.available;
-
-    String status;
-
-    Byte priority;
-
-    Presence.Mode mode;
-
-    PresenceBuilder(Presence presence, String stanzaId) {
-        super(presence, stanzaId);
-        copyFromPresence(presence);
-    }
-
-    PresenceBuilder(Presence presence, StanzaIdSource stanzaIdSource) {
-        super(presence, stanzaIdSource);
-        copyFromPresence(presence);
-    }
-
-    PresenceBuilder(StanzaIdSource stanzaIdSource) {
-        super(stanzaIdSource);
-    }
-
-    PresenceBuilder(String stanzaId) {
-        super(stanzaId);
-    }
-
-    private void copyFromPresence(Presence presence) {
-        type = presence.getType();
-        status = presence.getStatus();
-        priority = presence.getPriorityByte();
-        mode = presence.getMode();
-    }
-
-    @Override
-    protected void addStanzaSpecificAttributes(ToStringUtil.Builder builder) {
-        builder.addValue("type", type)
-               .addValue("mode", mode)
-               .addValue("priority", priority)
-               .addValue("status", status)
-               ;
-    }
-
-    public PresenceBuilder ofType(Presence.Type type) {
-        this.type = Objects.requireNonNull(type, "Type cannot be null");
-        return getThis();
-    }
-
-    public PresenceBuilder setStatus(String status) {
-        this.status = status;
-        return getThis();
-    }
-
-    public PresenceBuilder setPriority(int priority) {
-        if (priority < -128 || priority > 127) {
-            throw new IllegalArgumentException("Priority value " + priority +
-                    " is not valid. Valid range is -128 through 127.");
-        }
-        Byte priorityByte = (byte) priority;
-        return setPriority(priorityByte);
-    }
-
-    public PresenceBuilder setPriority(Byte priority) {
-        this.priority = priority;
-        return getThis();
-    }
-
-    public PresenceBuilder setMode(Presence.Mode mode) {
-        this.mode = mode;
-        return getThis();
-    }
-
-    @Override
-    public PresenceBuilder getThis() {
-        return this;
-    }
-
-    @Override
-    public Presence build() {
-        return new Presence(this);
-    }
-
-    @Override
-    public Presence.Type getType() {
-        return type;
-    }
-
-    @Override
-    public String getStatus() {
-        return status;
-    }
-
-    @Override
-    public int getPriority() {
-        return getPriorityByte();
-    }
-
-    @Override
-    public byte getPriorityByte() {
-        if (priority == null) {
-            return 0;
-        }
-        return priority;
-    }
-
-    @Override
-    public Presence.Mode getMode() {
-        if (mode == null) {
-            return Mode.available;
-        }
-        return mode;
-   }
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/PresenceView.java

@@ -1,59 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-public interface PresenceView extends StanzaView {
-
-    /**
-     * Returns the type of this presence stanza.
-     *
-     * @return the type of the presence stanza.
-     */
-    Presence.Type getType();
-
-    /**
-     * Returns the status message of the presence update, or <code>null</code> if there
-     * is not a status. The status is free-form text describing a user's presence
-     * (i.e., "gone to lunch").
-     *
-     * @return the status message.
-     */
-    String getStatus();
-
-    /**
-     * Returns the priority of the presence.
-     *
-     * @return the priority.
-     * @see <a href="https://tools.ietf.org/html/rfc6121#section-4.7.2.3">RFC 6121 § 4.7.2.3. Priority Element</a>
-     */
-    int getPriority();
-
-    /**
-     * Returns the priority of the presence.
-     *
-     * @return the priority.
-     * @see <a href="https://tools.ietf.org/html/rfc6121#section-4.7.2.3">RFC 6121 § 4.7.2.3. Priority Element</a>
-     */
-    byte getPriorityByte();
-
-    /**
-     * Returns the mode of the presence update.
-     *
-     * @return the mode.
-     */
-    Presence.Mode getMode();
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/SimpleIQ.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2014-2019 Florian Schmaus
+ * Copyright © 2014 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -29,10 +29,6 @@ public abstract class SimpleIQ extends IQ {
         super(childElementName, childElementNamespace);
     }
 
-    protected SimpleIQ(IqData iqBuilder, String childElementName, String childElementNamespace) {
-        super(iqBuilder, childElementName, childElementNamespace);
-    }
-
     @Override
     protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml) {
         xml.setEmptyElement();

smack-core/src/main/java/org/jivesoftware/smack/packet/Stanza.java

@@ -20,19 +20,15 @@ package org.jivesoftware.smack.packet;
 import static org.jivesoftware.smack.util.StringUtils.requireNotNullNorEmpty;
 
 import java.util.Collection;
-import java.util.Collections;
 import java.util.List;
 import java.util.Locale;
 
 import javax.xml.namespace.QName;
 
-import org.jivesoftware.smack.packet.id.StandardStanzaIdSource;
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
+import org.jivesoftware.smack.packet.id.StanzaIdUtil;
 import org.jivesoftware.smack.util.MultiMap;
 import org.jivesoftware.smack.util.PacketUtil;
-import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smack.util.XmlStringBuilder;
-import org.jivesoftware.smack.util.XmppElementUtil;
 
 import org.jxmpp.jid.Jid;
 
@@ -47,16 +43,12 @@ import org.jxmpp.jid.Jid;
  * XMPP Stanzas are {@link Message}, {@link IQ} and {@link Presence}. Which therefore subclass this
  * class. <b>If you think you need to subclass this class, then you are doing something wrong.</b>
  * </p>
- * <p>
- * Use {@link StanzaBuilder} to construct a stanza instance. All instance mutating methods of this
- * class are deprecated, although not all of them are currently marked as such, and must not be used.
- * </p>
  *
  * @author Matt Tucker
  * @author Florian Schmaus
  * @see <a href="http://xmpp.org/rfcs/rfc6120.html#stanzas">RFC 6120 § 8. XML Stanzas</a>
  */
-public abstract class Stanza implements StanzaView, TopLevelStreamElement {
+public abstract class Stanza implements TopLevelStreamElement {
 
     public static final String TEXT = "text";
     public static final String ITEM = "item";
@@ -64,14 +56,12 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
     protected static final String DEFAULT_LANGUAGE =
             java.util.Locale.getDefault().getLanguage().toLowerCase(Locale.US);
 
-    private final MultiMap<QName, ExtensionElement> extensionElements;
+    private final MultiMap<QName, ExtensionElement> extensionElements = new MultiMap<>();
 
     // Assume that all stanzas Smack handles are in the client namespace, since Smack is an XMPP client library. We can
     // change this behavior later if it is required.
     private final String namespace = StreamOpen.CLIENT_NAMESPACE;
 
-    private final StanzaIdSource usedStanzaIdSource;
-
     private String id = null;
     private Jid to;
     private Jid from;
@@ -90,47 +80,31 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
     protected String language;
 
     protected Stanza() {
-        extensionElements = new MultiMap<>();
-        usedStanzaIdSource = null;
-        id = StandardStanzaIdSource.DEFAULT.getNewStanzaId();
+        this(StanzaIdUtil.newStanzaId());
     }
 
-    protected Stanza(StanzaBuilder<?> stanzaBuilder) {
-        if (stanzaBuilder.stanzaIdSource != null) {
-            id = stanzaBuilder.stanzaIdSource.getNewStanzaId();
-            // Note that some stanza ID sources, e.g. StanzaBuilder.PresenceBuilder.EMPTY return null here. Hence we
-            // only check that the returned string is not empty.
-            assert StringUtils.isNullOrNotEmpty(id);
-            usedStanzaIdSource = stanzaBuilder.stanzaIdSource;
-        } else {
-            // N.B. It is ok if stanzaId here is null.
-            id = stanzaBuilder.stanzaId;
-            usedStanzaIdSource = null;
-        }
-
-        to = stanzaBuilder.to;
-        from = stanzaBuilder.from;
-
-        error = stanzaBuilder.stanzaError;
-
-        language = stanzaBuilder.language;
-
-        extensionElements = stanzaBuilder.extensionElements.clone();
+    protected Stanza(String stanzaId) {
+        setStanzaId(stanzaId);
     }
 
     protected Stanza(Stanza p) {
-        usedStanzaIdSource = p.usedStanzaIdSource;
-
         id = p.getStanzaId();
         to = p.getTo();
         from = p.getFrom();
         error = p.error;
 
-        extensionElements = p.extensionElements.clone();
+        // Copy extensions
+        for (ExtensionElement pe : p.getExtensions()) {
+            addExtension(pe);
+        }
     }
 
-    @Override
-    public final String getStanzaId() {
+    /**
+     * Returns the unique ID of the stanza. The returned value could be <code>null</code>.
+     *
+     * @return the packet's unique ID or <code>null</code> if the id is not available.
+     */
+    public String getStanzaId() {
         return id;
     }
 
@@ -153,7 +127,7 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      * @return true if the stanza ID is set, false otherwise.
      * @since 4.1
      */
-    public final boolean hasStanzaIdSet() {
+    public boolean hasStanzaIdSet() {
         // setStanzaId ensures that the id is either null or not empty,
         // so we can assume that it is set if it's not null.
         return id != null;
@@ -164,51 +138,57 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      *
      * @return the stanza id.
      * @since 4.2
-     * @deprecated use {@link StanzaBuilder} instead.
+     * @deprecated use {@link #setNewStanzaId()} instead.
      */
     @Deprecated
     // TODO: Remove in Smack 4.5.
     public String setStanzaId() {
-        if (!hasStanzaIdSet()) {
-            setNewStanzaId();
-        }
-        return getStanzaId();
+        return ensureStanzaIdSet();
     }
 
     /**
-     * Throws an {@link IllegalArgumentException} if this stanza has no stanza ID set.
+     * Set a new stanza ID even if there is already one set.
      *
-     * @throws IllegalArgumentException if this stanza has no stanza ID set.
-     * @since 4.4.
+     * @return the stanza id.
+     * @since 4.4
      */
-    public final void throwIfNoStanzaId() {
-        if (hasStanzaIdSet()) {
-            return;
+    public String setNewStanzaId() {
+        return ensureStanzaIdSet(true);
     }
 
-        throw new IllegalArgumentException("The stanza has no RFC stanza ID set, although one is required");
+    /**
+     * Ensure a stanza id is set.
+     *
+     * @return the stanza id.
+     * @since 4.4
+     */
+    public String ensureStanzaIdSet() {
+        return ensureStanzaIdSet(false);
     }
 
     /**
      * Ensure that a stanza ID is set.
      *
+     * @param forceNew force a new ID even if there is already one set.
      * @return the stanza ID.
      * @since 4.4
      */
-    // TODO: Remove this method once StanzaBuilder is ready.
-    protected String setNewStanzaId() {
-        if (usedStanzaIdSource != null) {
-            id = usedStanzaIdSource.getNewStanzaId();
+    private String ensureStanzaIdSet(boolean forceNew) {
+        if (forceNew || !hasStanzaIdSet()) {
+            setStanzaId(StanzaIdUtil.newStanzaId());
         }
-        else {
-            id = StandardStanzaIdSource.DEFAULT.getNewStanzaId();
-        }
-
         return getStanzaId();
     }
 
-    @Override
-    public final Jid getTo() {
+    /**
+     * Returns who the stanza is being sent "to", or <code>null</code> if
+     * the value is not set. The XMPP protocol often makes the "to"
+     * attribute optional, so it does not always need to be set.<p>
+     *
+     * @return who the stanza is being sent to, or <code>null</code> if the
+     *      value has not been set.
+     */
+    public Jid getTo() {
         return to;
     }
 
@@ -218,13 +198,19 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      *
      * @param to who the packet is being sent to.
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
     public void setTo(Jid to) {
         this.to = to;
     }
 
-    @Override
-    public final Jid getFrom() {
+    /**
+     * Returns who the stanza is being sent "from" or <code>null</code> if
+     * the value is not set. The XMPP protocol often makes the "from"
+     * attribute optional, so it does not always need to be set.<p>
+     *
+     * @return who the stanza is being sent from, or <code>null</code> if the
+     *      value has not been set.
+     */
+    public Jid getFrom() {
         return from;
     }
 
@@ -235,39 +221,35 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      *
      * @param from who the packet is being sent to.
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
     public void setFrom(Jid from) {
         this.from = from;
     }
 
-    @Override
-    public final StanzaError getError() {
+    /**
+     * Returns the error associated with this packet, or <code>null</code> if there are
+     * no errors.
+     *
+     * @return the error sub-packet or <code>null</code> if there isn't an error.
+     */
+    public StanzaError getError() {
         return error;
     }
 
     /**
      * Sets the error for this stanza.
      *
-     * @param stanzaError the error that this stanza carries and hence signals.
+     * @param xmppErrorBuilder the error to associate with this stanza.
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
-    public void setError(StanzaError stanzaError) {
-        error = stanzaError;
+    public void setError(StanzaError.Builder xmppErrorBuilder) {
+        if (xmppErrorBuilder == null) {
+            return;
         }
-
-    /**
-     * Deprecated.
-     * @param stanzaError the stanza error.
-     * @deprecated use {@link StanzaBuilder} instead.
-     */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
-    public void setError(StanzaError.Builder stanzaError) {
-        setError(stanzaError.build());
+        xmppErrorBuilder.setStanza(this);
+        error = xmppErrorBuilder.build();
     }
 
     @Override
-    public final String getLanguage() {
+    public String getLanguage() {
         return language;
     }
 
@@ -275,32 +257,23 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      * Sets the xml:lang of this Stanza.
      *
      * @param language the xml:lang of this Stanza.
-     * @deprecated use {@link StanzaBuilder#setLanguage(String)} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public void setLanguage(String language) {
         this.language = language;
     }
 
-    @Override
-    public final List<ExtensionElement> getExtensions() {
+    /**
+     * Returns a list of all extension elements of this stanza.
+     *
+     * @return a list of all extension elements of this stanza.
+     */
+    public List<ExtensionElement> getExtensions() {
         synchronized (extensionElements) {
             // No need to create a new list, values() will already create a new one for us
             return extensionElements.values();
         }
     }
 
-    public final MultiMap<QName, ExtensionElement> getExtensionsMap() {
-        return cloneExtensionsMap();
-    }
-
-    final MultiMap<QName, ExtensionElement> cloneExtensionsMap() {
-        synchronized (extensionElements) {
-            return extensionElements.clone();
-        }
-    }
-
     /**
      * Return a list of all extensions with the given element name <em>and</em> namespace.
      * <p>
@@ -312,27 +285,11 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      * @return a set of all matching extensions.
      * @since 4.1
      */
-    public final List<ExtensionElement> getExtensions(String elementName, String namespace) {
+    public List<ExtensionElement> getExtensions(String elementName, String namespace) {
         requireNotNullNorEmpty(elementName, "elementName must not be null nor empty");
         requireNotNullNorEmpty(namespace, "namespace must not be null nor empty");
         QName key = new QName(namespace, elementName);
-        return getExtensions(key);
-    }
-
-    @Override
-    public final List<ExtensionElement> getExtensions(QName qname) {
-        List<ExtensionElement> res;
-        synchronized (extensionElements) {
-            res = extensionElements.getAll(qname);
-        }
-        return Collections.unmodifiableList(res);
-    }
-
-    @Override
-    public final <E extends ExtensionElement> List<E> getExtensions(Class<E> extensionElementClass) {
-        synchronized (extensionElements) {
-            return XmppElementUtil.getElementsFrom(extensionElements, extensionElementClass);
-        }
+        return extensionElements.getAll(key);
     }
 
     /**
@@ -344,7 +301,7 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      * @param namespace the namespace of the extension that is desired.
      * @return the stanza extension with the given namespace.
      */
-    public final ExtensionElement getExtension(String namespace) {
+    public ExtensionElement getExtension(String namespace) {
         return PacketUtil.extensionElementFrom(getExtensions(), null, namespace);
     }
 
@@ -360,37 +317,27 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      * @return the extension, or <code>null</code> if it doesn't exist.
      */
     @SuppressWarnings("unchecked")
-    public final <PE extends ExtensionElement> PE getExtension(String elementName, String namespace) {
+    public <PE extends ExtensionElement> PE getExtension(String elementName, String namespace) {
         if (namespace == null) {
             return null;
         }
         QName key = new QName(namespace, elementName);
-        ExtensionElement packetExtension = getExtension(key);
+        ExtensionElement packetExtension;
+        synchronized (extensionElements) {
+            packetExtension = extensionElements.getFirst(key);
+        }
         if (packetExtension == null) {
             return null;
         }
         return (PE) packetExtension;
     }
 
-    @SuppressWarnings("unchecked")
-    @Override
-    public final <E extends ExtensionElement> E getExtension(QName qname) {
-        synchronized (extensionElements) {
-            return (E) extensionElements.getFirst(qname);
-        }
-    }
-
     /**
      * Adds a stanza extension to the packet. Does nothing if extension is null.
-     * <p>
-     * Please note that although this method is not yet marked as deprecated, it is recommended to use
-     * {@link StanzaBuilder#addExtension(ExtensionElement)} instead.
-     * </p>
      *
      * @param extension a stanza extension.
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
-    public final void addExtension(ExtensionElement extension) {
+    public void addExtension(ExtensionElement extension) {
         if (extension == null) return;
         QName key = extension.getQName();
         synchronized (extensionElements) {
@@ -401,17 +348,12 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
     /**
      * Add the given extension and override eventually existing extensions with the same name and
      * namespace.
-     * <p>
-     * Please note that although this method is not yet marked as deprecated, it is recommended to use
-     * {@link StanzaBuilder#overrideExtension(ExtensionElement)} instead.
-     * </p>
      *
      * @param extension the extension element to add.
      * @return one of the removed extensions or <code>null</code> if there are none.
      * @since 4.1.2
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
-    public final ExtensionElement overrideExtension(ExtensionElement extension) {
+    public ExtensionElement overrideExtension(ExtensionElement extension) {
         if (extension == null) return null;
         synchronized (extensionElements) {
             // Note that we need to use removeExtension(String, String) here. If would use
@@ -428,8 +370,7 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      *
      * @param extensions a collection of stanza extensions
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
-    public final void addExtensions(Collection<ExtensionElement> extensions) {
+    public void addExtensions(Collection<ExtensionElement> extensions) {
         if (extensions == null) return;
         for (ExtensionElement packetExtension : extensions) {
             addExtension(packetExtension);
@@ -446,7 +387,7 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      * @param namespace TODO javadoc me please
      * @return true if a stanza extension exists, false otherwise.
      */
-    public final boolean hasExtension(String elementName, String namespace) {
+    public boolean hasExtension(String elementName, String namespace) {
         if (elementName == null) {
             return hasExtension(namespace);
         }
@@ -456,9 +397,13 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
         }
     }
 
-    // Overridden in order to avoid an extra copy.
-    @Override
-    public final boolean hasExtension(String namespace) {
+    /**
+     * Check if a stanza extension with the given namespace exists.
+     *
+     * @param namespace TODO javadoc me please
+     * @return true if a stanza extension exists, false otherwise.
+     */
+    public boolean hasExtension(String namespace) {
         synchronized (extensionElements) {
             for (ExtensionElement packetExtension : extensionElements.values()) {
                 if (packetExtension.getNamespace().equals(namespace)) {
@@ -476,8 +421,7 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      * @param namespace TODO javadoc me please
      * @return the removed stanza extension or null.
      */
-    // TODO: Mark this as deprecated once StanzaBuilder is ready and all call sites are gone.
-    public final ExtensionElement removeExtension(String elementName, String namespace) {
+    public ExtensionElement removeExtension(String elementName, String namespace) {
         QName key = new QName(namespace, elementName);
         synchronized (extensionElements) {
             return extensionElements.remove(key);
@@ -489,11 +433,8 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      *
      * @param extension the stanza extension to remove.
      * @return the removed stanza extension or null.
-     * @deprecated use {@link StanzaBuilder} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
-    public final ExtensionElement removeExtension(ExtensionElement extension)  {
+    public ExtensionElement removeExtension(ExtensionElement extension)  {
         QName key = extension.getQName();
         synchronized (extensionElements) {
             List<ExtensionElement> list = extensionElements.getAll(key);
@@ -553,7 +494,7 @@ public abstract class Stanza implements StanzaView, TopLevelStreamElement {
      *
      * @param xml the XmlStringBuilder to append the error to.
      */
-    protected final void appendErrorIfExists(XmlStringBuilder xml) {
+    protected void appendErrorIfExists(XmlStringBuilder xml) {
         StanzaError error = getError();
         if (error != null) {
             xml.append(error);

smack-core/src/main/java/org/jivesoftware/smack/packet/StanzaBuilder.java

@@ -1,306 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import java.util.Collection;
-import java.util.List;
-
-import javax.xml.namespace.QName;
-
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-import org.jivesoftware.smack.util.Function;
-import org.jivesoftware.smack.util.MultiMap;
-import org.jivesoftware.smack.util.StringUtils;
-import org.jivesoftware.smack.util.ToStringUtil;
-import org.jivesoftware.smack.util.XmppElementUtil;
-
-import org.jxmpp.jid.Jid;
-import org.jxmpp.jid.impl.JidCreate;
-import org.jxmpp.stringprep.XmppStringprepException;
-
-public abstract class StanzaBuilder<B extends StanzaBuilder<B>> implements StanzaView {
-
-    final StanzaIdSource stanzaIdSource;
-    final String stanzaId;
-
-    Jid to;
-    Jid from;
-
-    StanzaError stanzaError;
-
-    String language;
-
-    MultiMap<QName, ExtensionElement> extensionElements = new MultiMap<>();
-
-    protected StanzaBuilder(StanzaBuilder<?> other) {
-        stanzaIdSource = other.stanzaIdSource;
-        stanzaId = other.stanzaId;
-
-        to = other.to;
-        from = other.from;
-        stanzaError = other.stanzaError;
-        language = other.language;
-        extensionElements = other.extensionElements.clone();
-    }
-
-    protected StanzaBuilder(StanzaIdSource stanzaIdSource) {
-        this.stanzaIdSource = stanzaIdSource;
-        this.stanzaId = null;
-    }
-
-    protected StanzaBuilder(String stanzaId) {
-        this.stanzaIdSource = null;
-        this.stanzaId = StringUtils.requireNullOrNotEmpty(stanzaId, "Stanza ID must not be the empty String");
-    }
-
-    protected StanzaBuilder(Stanza message, String stanzaId) {
-        this(stanzaId);
-        copyFromStanza(message);
-    }
-
-    protected StanzaBuilder(Stanza message, StanzaIdSource stanzaIdSource) {
-        this(stanzaIdSource);
-        copyFromStanza(message);
-    }
-
-    private void copyFromStanza(Stanza stanza) {
-        to = stanza.getTo();
-        from = stanza.getFrom();
-        stanzaError = stanza.getError();
-        language = stanza.getLanguage();
-
-        extensionElements = stanza.cloneExtensionsMap();
-    }
-
-    /**
-     * Set the recipent address of the stanza.
-     *
-     * @param to whoe the stanza is being sent to.
-     * @return a reference to this builder.
-     * @throws XmppStringprepException if the provided character sequence is not a valid XMPP address.
-     * @see #to(Jid)
-     */
-    public final B to(CharSequence to) throws XmppStringprepException {
-        return to(JidCreate.from(to));
-    }
-
-    /**
-     * Sets who the stanza is being sent "to". The XMPP protocol often makes the "to" attribute optional, so it does not
-     * always need to be set.
-     *
-     * @param to who the stanza is being sent to.
-     * @return a reference to this builder.
-     */
-    public final B to(Jid to) {
-        this.to = to;
-        return getThis();
-    }
-
-    /**
-     * Sets who the the stanza is being sent "from".
-     *
-     * @param from who the stanza is being sent from.
-     * @return a reference to this builder.
-     * @throws XmppStringprepException if the provided character sequence is not a valid XMPP address.
-     * @see #from(Jid)
-     */
-    public final B from(CharSequence from) throws XmppStringprepException {
-        return from(JidCreate.from(from));
-    }
-
-    /**
-     * Sets who the stanza is being sent "from". The XMPP protocol often makes the "from" attribute optional, so it does
-     * not always need to be set.
-     *
-     * @param from who the stanza is being sent from.
-     * @return a reference to this builder.
-     */
-    public final B from(Jid from) {
-        this.from = from;
-        return getThis();
-    }
-
-    /**
-     * Sets the error for this stanza.
-     *
-     * @param stanzaError the error to associate with this stanza.
-     * @return a reference to this builder.
-     */
-    public final B setError(StanzaError stanzaError) {
-        this.stanzaError = stanzaError;
-        return getThis();
-    }
-
-    /**
-     * Sets the xml:lang for this stanza.
-     *
-     * @param language the xml:lang of this stanza.
-     * @return a reference to this builder.
-     */
-    public final B setLanguage(String language) {
-        this.language = language;
-        return getThis();
-    }
-
-    public final B addExtension(ExtensionElement extensionElement) {
-        QName key = extensionElement.getQName();
-        extensionElements.put(key, extensionElement);
-        return getThis();
-    }
-
-    public final B addExtensions(Collection<? extends ExtensionElement> extensionElements) {
-        for (ExtensionElement extensionElement : extensionElements) {
-            addExtension(extensionElement);
-        }
-        return getThis();
-    }
-
-    public final B overrideExtension(ExtensionElement extensionElement) {
-        QName key = extensionElement.getQName();
-        extensionElements.remove(key);
-        extensionElements.put(key, extensionElement);
-        return getThis();
-    }
-
-    public abstract B getThis();
-
-    @Override
-    public final String getStanzaId() {
-        return stanzaId;
-    }
-
-    @Override
-    public final Jid getTo() {
-        return to;
-    }
-
-    @Override
-    public final Jid getFrom() {
-        return from;
-    }
-
-    @Override
-    public final String getLanguage() {
-        return language;
-    }
-
-    @Override
-    public final StanzaError getError() {
-        return stanzaError;
-    }
-
-    @SuppressWarnings("unchecked")
-    @Override
-    public final <E extends ExtensionElement> E getExtension(QName qname) {
-        return (E) extensionElements.getFirst(qname);
-    }
-
-    @Override
-    public final List<ExtensionElement> getExtensions() {
-        return extensionElements.values();
-    }
-
-    @Override
-    public final List<ExtensionElement> getExtensions(QName qname) {
-        return extensionElements.getAll(qname);
-    }
-
-    @Override
-    public final <E extends ExtensionElement> List<E> getExtensions(Class<E> extensionElementClass) {
-        return XmppElementUtil.getElementsFrom(extensionElements, extensionElementClass);
-    }
-
-    public final boolean willBuildStanzaWithId() {
-        return stanzaIdSource != null || StringUtils.isNotEmpty(stanzaId);
-    }
-
-    public final void throwIfNoStanzaId() {
-        if (willBuildStanzaWithId()) {
-            return;
-        }
-        throw new IllegalArgumentException(
-                        "The builder will not build a stanza with an ID set, although it is required");
-    }
-
-    protected abstract void addStanzaSpecificAttributes(ToStringUtil.Builder builder);
-
-    @Override
-    public final String toString() {
-        ToStringUtil.Builder builder = ToStringUtil.builderFor(getClass())
-            .addValue("id", stanzaId)
-            .addValue("from", from)
-            .addValue("to", to)
-            .addValue("language", language)
-            .addValue("error", stanzaError)
-            ;
-
-        addStanzaSpecificAttributes(builder);
-
-        builder.add("Extension Elements", extensionElements.values(), e -> {
-            return e.getQName();
-        });
-
-        return builder.build();
-    }
-
-    public static MessageBuilder buildMessage() {
-        return buildMessage(null);
-    }
-
-    public static MessageBuilder buildMessage(String stanzaId) {
-        return new MessageBuilder(stanzaId);
-    }
-
-    public static MessageBuilder buildMessageFrom(Message message, String stanzaId) {
-        return new MessageBuilder(message, stanzaId);
-    }
-
-    public static MessageBuilder buildMessageFrom(Message message, StanzaIdSource stanzaIdSource) {
-        return new MessageBuilder(message, stanzaIdSource);
-    }
-
-    public static PresenceBuilder buildPresence() {
-        return buildPresence(null);
-    }
-
-    public static PresenceBuilder buildPresence(String stanzaId) {
-        return new PresenceBuilder(stanzaId);
-    }
-
-    public static PresenceBuilder buildPresenceFrom(Presence presence, String stanzaId) {
-        return new PresenceBuilder(presence, stanzaId);
-    }
-
-    public static PresenceBuilder buildPresenceFrom(Presence presence, StanzaIdSource stanzaIdSource) {
-        return new PresenceBuilder(presence, stanzaIdSource);
-    }
-
-    public static IqData buildIqData(String stanzaId) {
-        return new IqData(stanzaId);
-    }
-
-    public static <SB extends StanzaBuilder<?>> SB buildResponse(StanzaView request, Function<SB, String> builderFromStanzaId) {
-        SB responseBuilder = builderFromStanzaId.apply(request.getStanzaId());
-
-        responseBuilder.to(request.getFrom())
-            .from(request.getTo())
-            ;
-
-        return responseBuilder;
-    }
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/StanzaError.java

@@ -106,6 +106,7 @@ public class StanzaError extends AbstractError implements ExtensionElement {
     private final String conditionText;
     private final String errorGenerator;
     private final Type type;
+    private final Stanza stanza;
 
     /**
      * Creates a new error with the specified type, condition and message.
@@ -119,11 +120,13 @@ public class StanzaError extends AbstractError implements ExtensionElement {
      * @param errorGenerator TODO javadoc me please
      * @param descriptiveTexts TODO javadoc me please
      * @param extensions list of stanza extensions
+     * @param stanza the stanza carrying this XMPP error.
      */
     public StanzaError(Condition condition, String conditionText, String errorGenerator, Type type, Map<String, String> descriptiveTexts,
-            List<ExtensionElement> extensions) {
+            List<ExtensionElement> extensions, Stanza stanza) {
         super(descriptiveTexts, ERROR_CONDITION_AND_TEXT_NAMESPACE, extensions);
         this.condition = Objects.requireNonNull(condition, "condition must not be null");
+        this.stanza = stanza;
         // Some implementations may send the condition as non-empty element containing the empty string, that is
         // <condition xmlns='foo'></condition>, in this case the parser may calls this constructor with the empty string
         // as conditionText, therefore reset it to null if it's the empty string
@@ -181,6 +184,16 @@ public class StanzaError extends AbstractError implements ExtensionElement {
         return conditionText;
     }
 
+    /**
+     * Get the stanza carrying the XMPP error.
+     *
+     * @return the stanza carrying the XMPP error.
+     * @since 4.2
+     */
+    public Stanza getStanza() {
+        return stanza;
+    }
+
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder("XMPPError: ");
@@ -258,6 +271,7 @@ public class StanzaError extends AbstractError implements ExtensionElement {
         private String conditionText;
         private String errorGenerator;
         private Type type;
+        private Stanza stanza;
 
         private Builder() {
         }
@@ -282,11 +296,17 @@ public class StanzaError extends AbstractError implements ExtensionElement {
             return this;
         }
 
+        public Builder setStanza(Stanza stanza) {
+            this.stanza = stanza;
+            return this;
+        }
+
         public Builder copyFrom(StanzaError xmppError) {
             setCondition(xmppError.getCondition());
             setType(xmppError.getType());
             setConditionText(xmppError.getConditionText());
             setErrorGenerator(xmppError.getErrorGenerator());
+            setStanza(xmppError.getStanza());
             setDescriptiveTexts(xmppError.descriptiveTexts);
             setTextNamespace(xmppError.textNamespace);
             setExtensions(xmppError.extensions);
@@ -295,7 +315,7 @@ public class StanzaError extends AbstractError implements ExtensionElement {
 
         public StanzaError build() {
             return new StanzaError(condition, conditionText, errorGenerator, type, descriptiveTexts,
-            extensions);
+            extensions, stanza);
         }
 
         @Override

smack-core/src/main/java/org/jivesoftware/smack/packet/StanzaFactory.java

@@ -1,53 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import org.jivesoftware.smack.packet.id.StanzaIdSource;
-
-public final class StanzaFactory {
-
-    private final StanzaIdSource stanzaIdSource;
-
-    StanzaIdSource getStanzaIdSource() {
-        return stanzaIdSource;
-    }
-
-    public StanzaFactory(StanzaIdSource stanzaIdSource) {
-        this.stanzaIdSource = stanzaIdSource;
-    }
-
-    public MessageBuilder buildMessageStanza() {
-        return new MessageBuilder(stanzaIdSource);
-    }
-
-    public MessageBuilder buildMessageStanzaFrom(Message message) {
-        return new MessageBuilder(message, stanzaIdSource);
-    }
-
-    public PresenceBuilder buildPresenceStanza() {
-        return new PresenceBuilder(stanzaIdSource);
-    }
-
-    public PresenceBuilder buildPresenceStanzaFrom(Presence presence) {
-        return new PresenceBuilder(presence, stanzaIdSource);
-    }
-
-    public IqData buildIqData() {
-        return new IqData(stanzaIdSource);
-    }
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/StanzaView.java

@@ -1,102 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-import java.util.List;
-
-import javax.xml.namespace.QName;
-
-import org.jivesoftware.smack.util.XmppElementUtil;
-
-import org.jxmpp.jid.Jid;
-
-public interface StanzaView extends XmlLangElement {
-
-    /**
-     * Returns the unique ID of the stanza. The returned value could be <code>null</code>.
-     *
-     * @return the packet's unique ID or <code>null</code> if the id is not available.
-     */
-    String getStanzaId();
-
-    /**
-     * Returns who the stanza is being sent "to", or <code>null</code> if
-     * the value is not set. The XMPP protocol often makes the "to"
-     * attribute optional, so it does not always need to be set.<p>
-     *
-     * @return who the stanza is being sent to, or <code>null</code> if the
-     *      value has not been set.
-     */
-    Jid getTo();
-
-    /**
-     * Returns who the stanza is being sent "from" or <code>null</code> if
-     * the value is not set. The XMPP protocol often makes the "from"
-     * attribute optional, so it does not always need to be set.<p>
-     *
-     * @return who the stanza is being sent from, or <code>null</code> if the
-     *      value has not been set.
-     */
-    Jid getFrom();
-
-    /**
-     * Returns the error associated with this packet, or <code>null</code> if there are
-     * no errors.
-     *
-     * @return the error sub-packet or <code>null</code> if there isn't an error.
-     */
-    StanzaError getError();
-
-    <E extends ExtensionElement> E getExtension(QName qname);
-
-    default boolean hasExtension(QName qname) {
-        return getExtension(qname) != null;
-    }
-
-    /**
-     * Check if a extension element with the given namespace exists.
-     *
-     * @param namespace the namespace of the extension element to check for.
-     * @return true if a stanza extension exists, false otherwise.
-     */
-    default boolean hasExtension(String namespace) {
-        for (ExtensionElement packetExtension : getExtensions()) {
-            if (packetExtension.getNamespace().equals(namespace)) {
-                return true;
-            }
-        }
-
-        return false;
-    }
-
-    @SuppressWarnings("unchecked")
-    default <E extends ExtensionElement> E getExtension(Class<E> extensionElementClass) {
-        QName qname = XmppElementUtil.getQNameFor(extensionElementClass);
-        return (E) getExtension(qname);
-    }
-
-    /**
-     * Returns a list of all extension elements of this stanza.
-     *
-     * @return a list of all extension elements of this stanza.
-     */
-    List<ExtensionElement> getExtensions();
-
-    List<ExtensionElement> getExtensions(QName qname);
-
-    <E extends ExtensionElement> List<E> getExtensions(Class<E> extensionElementClass);
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/StartTls.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2014-2019 Florian Schmaus
+ * Copyright © 2014-2018 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -52,15 +52,9 @@ public class StartTls implements Nonza {
     @Override
     public XmlStringBuilder toXML(org.jivesoftware.smack.packet.XmlEnvironment enclosingNamespace) {
         XmlStringBuilder xml = new XmlStringBuilder(this, enclosingNamespace);
-
-        if (required) {
         xml.rightAngleBracket();
-            xml.emptyElement("required");
+        xml.condEmptyElement(required, "required");
         xml.closeElement(this);
-        } else {
-            xml.closeEmptyElement();
-        }
-
         return xml;
     }
 

smack-core/src/main/java/org/jivesoftware/smack/packet/XmlEnvironment.java

@@ -18,6 +18,7 @@ package org.jivesoftware.smack.packet;
 
 import org.jivesoftware.smack.util.ParserUtils;
 import org.jivesoftware.smack.util.StringUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 
 public class XmlEnvironment {

smack-core/src/main/java/org/jivesoftware/smack/packet/XmlLangElement.java

@@ -1,28 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet;
-
-public interface XmlLangElement {
-
-    /**
-    * Returns the xml:lang of this XML element, or null if one has not been set.
-    *
-    * @return the xml:lang of this XML element, or null.
-    */
-    String getLanguage();
-
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/id/RandomStringStanzaIdSource.java

@@ -1,54 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet.id;
-
-import org.jivesoftware.smack.util.StringUtils;
-
-public final class RandomStringStanzaIdSource  {
-
-    public static class Factory implements StanzaIdSourceFactory {
-
-        private static final int REQUIRED_MIN_LENGTH = 10;
-
-        private final int length;
-        private final boolean verySecure;
-
-        public static final Factory VERY_SECURE = new Factory(10, true);
-        public static final Factory MEDIUM_SECURE = new Factory(10, false);
-
-        public Factory(int length, boolean verySecure) {
-            if (length < REQUIRED_MIN_LENGTH) {
-                throw new IllegalArgumentException(
-                                "Insufficient length " + length + ", must be at least " + REQUIRED_MIN_LENGTH);
-            }
-            this.length = length;
-            this.verySecure = verySecure;
-        }
-
-        @Override
-        public StanzaIdSource constructStanzaIdSource() {
-            StanzaIdSource stanzaIdSource;
-            if (verySecure) {
-                stanzaIdSource = () -> StringUtils.randomString(length);
-            } else {
-                stanzaIdSource = () -> StringUtils.insecureRandomString(length);
-            }
-            return stanzaIdSource;
-        }
-
-    }
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/id/StanzaIdSource.java

@@ -1,21 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet.id;
-
-public interface StanzaIdSource {
-    String getNewStanzaId();
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/id/StanzaIdSourceFactory.java

@@ -1,21 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet.id;
-
-public interface StanzaIdSourceFactory {
-    StanzaIdSource constructStanzaIdSource();
-}

smack-core/src/main/java/org/jivesoftware/smack/packet/id/StanzaIdUtil.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2019 Florian Schmaus
+ * Copyright 2003-2007 Jive Software, 2015 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,32 +20,20 @@ import java.util.concurrent.atomic.AtomicLong;
 
 import org.jivesoftware.smack.util.StringUtils;
 
-public class StandardStanzaIdSource implements StanzaIdSource {
-
-    public static final StandardStanzaIdSource DEFAULT = new StandardStanzaIdSource();
+public class StanzaIdUtil {
 
     /**
      * A prefix helps to make sure that ID's are unique across multiple instances.
      */
-    private final String prefix = StringUtils.randomString(5) + "-";
+    private static final String PREFIX = StringUtils.randomString(5) + "-";
 
     /**
      * Keeps track of the current increment, which is appended to the prefix to
      * forum a unique ID.
      */
-    private final AtomicLong id = new AtomicLong();
-
-    @Override
-    public String getNewStanzaId() {
-        return prefix + Long.toString(id.incrementAndGet());
-    }
-
-    public static class Factory implements StanzaIdSourceFactory {
-
-        @Override
-        public StandardStanzaIdSource constructStanzaIdSource() {
-            return new StandardStanzaIdSource();
-        }
+    private static final AtomicLong ID = new AtomicLong();
 
+    public static String newStanzaId() {
+        return PREFIX + Long.toString(ID.incrementAndGet());
     }
 }

smack-core/src/main/java/org/jivesoftware/smack/packet/id/UuidStanzaIdSource.java

@@ -1,41 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.packet.id;
-
-import java.util.UUID;
-
-public final class UuidStanzaIdSource implements StanzaIdSource {
-
-    public static final UuidStanzaIdSource INSTANCE = new UuidStanzaIdSource();
-
-    private UuidStanzaIdSource() {
-    }
-
-    @Override
-    public String getNewStanzaId() {
-        return UUID.randomUUID().toString();
-    }
-
-    public static class Factory implements StanzaIdSourceFactory {
-
-        @Override
-        public UuidStanzaIdSource constructStanzaIdSource() {
-            return INSTANCE;
-        }
-
-    }
-}

smack-core/src/main/java/org/jivesoftware/smack/parsing/ParsingExceptionCallback.java

@@ -39,7 +39,7 @@ public interface ParsingExceptionCallback {
      * Called when parsing a stanza caused an exception.
      *
      * @param stanzaData the raw stanza data that caused the exception
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      */
     void handleUnparsableStanza(UnparseableStanza stanzaData) throws IOException;
 

smack-core/src/main/java/org/jivesoftware/smack/parsing/StandardExtensionElementProvider.java

@@ -25,6 +25,7 @@ import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.provider.ExtensionElementProvider;
 import org.jivesoftware.smack.util.ParserUtils;
 import org.jivesoftware.smack.util.StringUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
 

smack-core/src/main/java/org/jivesoftware/smack/provider/AbstractProvider.java

@@ -1,45 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.provider;
-
-import java.lang.reflect.ParameterizedType;
-import java.lang.reflect.Type;
-
-import org.jivesoftware.smack.packet.Element;
-
-public class AbstractProvider<E extends Element> {
-
-    private final Class<E> elementClass;
-
-    @SuppressWarnings("unchecked")
-    protected AbstractProvider() {
-        Type currentType = getClass().getGenericSuperclass();
-        while (!(currentType instanceof ParameterizedType)) {
-            Class<?> currentClass = (Class<?>) currentType;
-            currentType = currentClass.getGenericSuperclass();
-        }
-        ParameterizedType parameterizedGenericSuperclass = (ParameterizedType) currentType;
-        Type[] actualTypeArguments = parameterizedGenericSuperclass.getActualTypeArguments();
-        Type elementType = actualTypeArguments[0];
-
-        elementClass =  (Class<E>) elementType;
-    }
-
-    public final Class<E> getElementClass() {
-        return elementClass;
-    }
-}

smack-core/src/main/java/org/jivesoftware/smack/provider/BodyElementProvider.java

@@ -23,6 +23,7 @@ import java.io.IOException;
 import org.jivesoftware.smack.packet.Message;
 import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.util.ParserUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
 

smack-core/src/main/java/org/jivesoftware/smack/provider/EmbeddedExtensionProvider.java

@@ -26,6 +26,7 @@ import org.jivesoftware.smack.packet.ExtensionElement;
 import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.parsing.SmackParsingException;
 import org.jivesoftware.smack.util.PacketParserUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
 

smack-core/src/main/java/org/jivesoftware/smack/provider/IQProvider.java

@@ -17,53 +17,15 @@
 
 package org.jivesoftware.smack.provider;
 
-import java.io.IOException;
-
 import org.jivesoftware.smack.packet.IQ;
-import org.jivesoftware.smack.packet.IqData;
-import org.jivesoftware.smack.packet.XmlEnvironment;
-import org.jivesoftware.smack.parsing.SmackParsingException;
-import org.jivesoftware.smack.util.ParserUtils;
-import org.jivesoftware.smack.xml.XmlPullParser;
-import org.jivesoftware.smack.xml.XmlPullParserException;
 
 /**
- * <p>
- * <b>Deprecation Notice:</b> This class is deprecated, use {@link IQProvider} instead.
- * </p>
  * An abstract class for parsing custom IQ packets. Each IQProvider must be registered with
  * the ProviderManager class for it to be used. Every implementation of this
  * abstract class <b>must</b> have a public, no-argument constructor.
  *
  * @author Matt Tucker
  */
-public abstract class IQProvider<I extends IQ> extends IqProvider<I> {
-
-    public final I parse(XmlPullParser parser) throws IOException, XmlPullParserException, SmackParsingException {
-        return parse(parser, (XmlEnvironment) null);
-    }
-
-    public final I parse(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws IOException, XmlPullParserException, SmackParsingException {
-        // XPP3 calling convention assert: Parser should be at start tag
-        ParserUtils.assertAtStartTag(parser);
-
-        final int initialDepth = parser.getDepth();
-        final XmlEnvironment xmlEnvironment = XmlEnvironment.from(parser, outerXmlEnvironment);
-
-        I e = parse(parser, initialDepth, xmlEnvironment);
-
-        // XPP3 calling convention assert: Parser should be at end tag of the consumed/parsed element
-        ParserUtils.forwardToEndTagOfDepth(parser, initialDepth);
-        return e;
-    }
-
-    @Override
-    public final I parse(XmlPullParser parser, int initialDepth, IqData iqData, XmlEnvironment xmlEnvironment)
-                    throws XmlPullParserException, IOException, SmackParsingException {
-        // Old-style IQ parsers do not need IqData.
-        return parse(parser, initialDepth, xmlEnvironment);
-    }
-
-    public abstract I parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException;
+public abstract class IQProvider<I extends IQ> extends Provider<I> {
 
 }

smack-core/src/main/java/org/jivesoftware/smack/provider/IQProviderInfo.java

@@ -34,7 +34,7 @@ public final class IQProviderInfo extends AbstractProviderInfo {
      * @param namespace Namespace that provider parses.
      * @param iqProvider The provider implementation.
      */
-    public IQProviderInfo(String elementName, String namespace, IqProvider<IQ> iqProvider) {
+    public IQProviderInfo(String elementName, String namespace, IQProvider<IQ> iqProvider) {
         super(elementName, namespace, iqProvider);
     }
 }

smack-core/src/main/java/org/jivesoftware/smack/provider/IntrospectionProvider.java

@@ -23,6 +23,7 @@ import org.jivesoftware.smack.packet.ExtensionElement;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.util.ParserUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
 

smack-core/src/main/java/org/jivesoftware/smack/provider/IqProvider.java

@@ -1,46 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.provider;
-
-import java.io.IOException;
-
-import org.jivesoftware.smack.packet.IQ;
-import org.jivesoftware.smack.packet.IqData;
-import org.jivesoftware.smack.packet.XmlEnvironment;
-import org.jivesoftware.smack.parsing.SmackParsingException;
-import org.jivesoftware.smack.xml.XmlPullParser;
-import org.jivesoftware.smack.xml.XmlPullParserException;
-
-public abstract class IqProvider<I extends IQ> extends AbstractProvider<I> {
-
-    public final I parse(XmlPullParser parser, IqData iqCommon)
-                    throws XmlPullParserException, IOException, SmackParsingException {
-        return parse(parser, iqCommon, null);
-    }
-
-    public final I parse(XmlPullParser parser, IqData iqData, XmlEnvironment outerXmlEnvironment)
-                    throws XmlPullParserException, IOException, SmackParsingException {
-        final int initialDepth = parser.getDepth();
-        final XmlEnvironment xmlEnvironment = XmlEnvironment.from(parser, outerXmlEnvironment);
-
-        return parse(parser, initialDepth, iqData, xmlEnvironment);
-    }
-
-    public abstract I parse(XmlPullParser parser, int initialDepth, IqData iqData, XmlEnvironment xmlEnvironment)
-                    throws XmlPullParserException, IOException, SmackParsingException;
-
-}

smack-core/src/main/java/org/jivesoftware/smack/provider/Provider.java

@@ -18,11 +18,14 @@
 package org.jivesoftware.smack.provider;
 
 import java.io.IOException;
+import java.lang.reflect.ParameterizedType;
+import java.lang.reflect.Type;
 
 import org.jivesoftware.smack.packet.Element;
 import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.parsing.SmackParsingException;
 import org.jivesoftware.smack.util.ParserUtils;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
 
@@ -37,7 +40,27 @@ import org.jivesoftware.smack.xml.XmlPullParserException;
  * @author Florian Schmaus
  * @param <E> the type of the resulting element.
  */
-public abstract class Provider<E extends Element> extends AbstractProvider<E> {
+public abstract class Provider<E extends Element> {
+
+    private final Class<E> elementClass;
+
+    @SuppressWarnings("unchecked")
+    protected Provider() {
+        Type currentType = getClass().getGenericSuperclass();
+        while (!(currentType instanceof ParameterizedType)) {
+            Class<?> currentClass = (Class<?>) currentType;
+            currentType = currentClass.getGenericSuperclass();
+        }
+        ParameterizedType parameterizedGenericSuperclass = (ParameterizedType) currentType;
+        Type[] actualTypeArguments = parameterizedGenericSuperclass.getActualTypeArguments();
+        Type elementType = actualTypeArguments[0];
+
+        elementClass =  (Class<E>) elementType;
+    }
+
+    public final Class<E> getElementClass() {
+        return elementClass;
+    }
 
     public final E parse(XmlPullParser parser) throws IOException, XmlPullParserException, SmackParsingException {
         return parse(parser, null);

smack-core/src/main/java/org/jivesoftware/smack/provider/ProviderFileLoader.java

@@ -80,8 +80,8 @@ public class ProviderFileLoader implements ProviderLoader {
                                     // an IQ class, add the class object itself, then we'll use
                                     // reflection later to create instances of the class.
                                     // Add the provider to the map.
-                                    if (IqProvider.class.isAssignableFrom(provider)) {
-                                        IqProvider<IQ> iqProvider = (IqProvider<IQ>) provider.getConstructor().newInstance();
+                                    if (IQProvider.class.isAssignableFrom(provider)) {
+                                        IQProvider<IQ> iqProvider = (IQProvider<IQ>) provider.getConstructor().newInstance();
                                         iqProviders.add(new IQProviderInfo(elementName, namespace, iqProvider));
                                     }
                                     else {

smack-core/src/main/java/org/jivesoftware/smack/provider/ProviderManager.java

@@ -113,7 +113,7 @@ import org.jivesoftware.smack.util.XmppElementUtil;
 public final class ProviderManager {
 
     private static final Map<QName, ExtensionElementProvider<ExtensionElement>> extensionProviders = new ConcurrentHashMap<>();
-    private static final Map<QName, IqProvider<IQ>> iqProviders = new ConcurrentHashMap<>();
+    private static final Map<QName, IQProvider<IQ>> iqProviders = new ConcurrentHashMap<>();
     private static final Map<QName, ExtensionElementProvider<ExtensionElement>> streamFeatureProviders = new ConcurrentHashMap<>();
     private static final Map<QName, NonzaProvider<? extends Nonza>> nonzaProviders = new ConcurrentHashMap<>();
 
@@ -167,7 +167,7 @@ public final class ProviderManager {
      * @param namespace the XML namespace.
      * @return the IQ provider.
      */
-    public static IqProvider<IQ> getIQProvider(String elementName, String namespace) {
+    public static IQProvider<IQ> getIQProvider(String elementName, String namespace) {
         QName key = getQName(elementName, namespace);
         return iqProviders.get(key);
     }
@@ -179,8 +179,8 @@ public final class ProviderManager {
      *
      * @return all IQProvider instances.
      */
-    public static List<IqProvider<IQ>> getIQProviders() {
-        List<IqProvider<IQ>> providers = new ArrayList<>(iqProviders.size());
+    public static List<IQProvider<IQ>> getIQProviders() {
+        List<IQProvider<IQ>> providers = new ArrayList<>(iqProviders.size());
         providers.addAll(iqProviders.values());
         return providers;
     }
@@ -200,10 +200,10 @@ public final class ProviderManager {
         validate(elementName, namespace);
         // First remove existing providers
         QName key = removeIQProvider(elementName, namespace);
-        if (provider instanceof IqProvider) {
-            iqProviders.put(key, (IqProvider<IQ>) provider);
+        if (provider instanceof IQProvider) {
+            iqProviders.put(key, (IQProvider<IQ>) provider);
         } else {
-            throw new IllegalArgumentException("Provider must be an instance of IqProvider");
+            throw new IllegalArgumentException("Provider must be an IQProvider");
         }
     }
 

smack-core/src/main/java/org/jivesoftware/smack/provider/TlsFailureProvider.java

@@ -18,6 +18,7 @@ package org.jivesoftware.smack.provider;
 
 import org.jivesoftware.smack.packet.TlsProceed;
 import org.jivesoftware.smack.packet.XmlEnvironment;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 
 public final class TlsFailureProvider extends NonzaProvider<TlsProceed> {

smack-core/src/main/java/org/jivesoftware/smack/provider/TlsProceedProvider.java

@@ -18,6 +18,7 @@ package org.jivesoftware.smack.provider;
 
 import org.jivesoftware.smack.packet.TlsFailure;
 import org.jivesoftware.smack.packet.XmlEnvironment;
+
 import org.jivesoftware.smack.xml.XmlPullParser;
 
 public final class TlsProceedProvider extends NonzaProvider<TlsFailure> {

smack-core/src/main/java/org/jivesoftware/smack/sasl/SASLMechanism.java

@@ -222,7 +222,7 @@ public abstract class SASLMechanism implements Comparable<SASLMechanism> {
      * empty array here.
      *
      * @return the initial response or null
-     * @throws SmackSaslException if a SASL specific error occurred.
+     * @throws SmackSaslException if a SASL specific error occured.
      */
     protected abstract byte[] getAuthenticationText() throws SmackSaslException;
 

smack-core/src/main/java/org/jivesoftware/smack/sasl/core/ScramMechanism.java

@@ -259,7 +259,7 @@ public abstract class ScramMechanism extends SASLMechanism {
     /**
      *
      * @return the Channel Binding data.
-     * @throws SmackSaslException if a SASL specific error occurred.
+     * @throws SmackSaslException if a SASL specific error occured.
      */
     protected byte[] getChannelBindingData() throws SmackSaslException {
         return null;

smack-core/src/main/java/org/jivesoftware/smack/util/FileUtils.java

@@ -110,7 +110,7 @@ public final class FileUtils {
      *
      * @param file TODO javadoc me please
      * @return the content of file or null in case of an error
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      */
     @SuppressWarnings("DefaultCharset")
     public static String readFileOrThrow(File file) throws IOException {

smack-core/src/main/java/org/jivesoftware/smack/util/Function.java

@@ -1,23 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.util;
-
-public interface Function<R, T> {
-
-    R apply(T t);
-
-}

smack-core/src/main/java/org/jivesoftware/smack/util/MultiMap.java

@@ -34,7 +34,7 @@ import java.util.Set;
  * @param <K> the type of the keys the map uses.
  * @param <V> the type of the values the map uses.
  */
-public class MultiMap<K, V> implements TypedCloneable<MultiMap<K, V>> {
+public class MultiMap<K, V> {
 
     /**
      * The constant value {@value}.
@@ -252,19 +252,6 @@ public class MultiMap<K, V> implements TypedCloneable<MultiMap<K, V>> {
         return new MultiMap<K, V>(Collections.unmodifiableMap(mapCopy));
     }
 
-    @Override
-    public MultiMap<K, V> clone() {
-        Map<K, List<V>> clonedMap = new LinkedHashMap<>(map.size());
-
-        // TODO: Use Map.forEach() once Smack's minimum Android API is 24 or higher.
-        for (Entry<K, List<V>> entry : map.entrySet()) {
-            List<V> clonedList = CollectionUtil.newListWith(entry.getValue());
-            clonedMap.put(entry.getKey(), clonedList);
-        }
-
-        return new MultiMap<>(clonedMap);
-    }
-
     private static final class SimpleMapEntry<K, V> implements Map.Entry<K, V> {
 
         private final K key;

smack-core/src/main/java/org/jivesoftware/smack/util/PacketParserUtils.java

@@ -28,7 +28,6 @@ import java.util.HashMap;
 import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
-import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import org.jivesoftware.smack.compress.packet.Compress;
@@ -36,14 +35,10 @@ import org.jivesoftware.smack.packet.EmptyResultIQ;
 import org.jivesoftware.smack.packet.ErrorIQ;
 import org.jivesoftware.smack.packet.ExtensionElement;
 import org.jivesoftware.smack.packet.IQ;
-import org.jivesoftware.smack.packet.IqData;
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
 import org.jivesoftware.smack.packet.Presence;
-import org.jivesoftware.smack.packet.PresenceBuilder;
 import org.jivesoftware.smack.packet.Session;
 import org.jivesoftware.smack.packet.Stanza;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 import org.jivesoftware.smack.packet.StanzaError;
 import org.jivesoftware.smack.packet.StartTls;
 import org.jivesoftware.smack.packet.StreamError;
@@ -52,7 +47,7 @@ import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.parsing.SmackParsingException;
 import org.jivesoftware.smack.parsing.StandardExtensionElementProvider;
 import org.jivesoftware.smack.provider.ExtensionElementProvider;
-import org.jivesoftware.smack.provider.IqProvider;
+import org.jivesoftware.smack.provider.IQProvider;
 import org.jivesoftware.smack.provider.ProviderManager;
 import org.jivesoftware.smack.xml.SmackXmlParser;
 import org.jivesoftware.smack.xml.XmlPullParser;
@@ -106,9 +101,9 @@ public class PacketParserUtils {
      * @param parser TODO javadoc me please
      * @param outerXmlEnvironment the outer XML environment (optional).
      * @return a stanza which is either a Message, IQ or Presence.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      */
     public static Stanza parseStanza(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, SmackParsingException, IOException {
         ParserUtils.assertAtStartTag(parser);
@@ -125,25 +120,18 @@ public class PacketParserUtils {
         }
     }
 
-    private interface StanzaBuilderSupplier<SB extends StanzaBuilder<?>> {
-        SB get(String stanzaId);
-    }
-
-    private static <SB extends StanzaBuilder<?>> SB parseCommonStanzaAttributes(StanzaBuilderSupplier<SB> stanzaBuilderSupplier, XmlPullParser parser, XmlEnvironment xmlEnvironment) throws XmppStringprepException {
+    private static void parseCommonStanzaAttributes(Stanza stanza, XmlPullParser parser, XmlEnvironment xmlEnvironment) throws XmppStringprepException {
         String id = parser.getAttributeValue("id");
-
-        SB stanzaBuilder = stanzaBuilderSupplier.get(id);
+        stanza.setStanzaId(id);
 
         Jid to = ParserUtils.getJidAttribute(parser, "to");
-        stanzaBuilder.to(to);
+        stanza.setTo(to);
 
         Jid from = ParserUtils.getJidAttribute(parser, "from");
-        stanzaBuilder.from(from);
+        stanza.setFrom(from);
 
         String language = ParserUtils.getXmlLang(parser, xmlEnvironment);
-        stanzaBuilder.setLanguage(language);
-
-        return stanzaBuilder;
+        stanza.setLanguage(language);
     }
 
     public static Message parseMessage(XmlPullParser parser) throws XmlPullParserException, IOException, SmackParsingException {
@@ -156,8 +144,8 @@ public class PacketParserUtils {
      * @param parser the XML parser, positioned at the start of a message packet.
      * @param outerXmlEnvironment the outer XML environment (optional).
      * @return a Message packet.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
-     * @throws IOException if an I/O error occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
+     * @throws IOException if an I/O error occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
      */
     public static Message parseMessage(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
@@ -166,14 +154,11 @@ public class PacketParserUtils {
 
         XmlEnvironment messageXmlEnvironment = XmlEnvironment.from(parser, outerXmlEnvironment);
         final int initialDepth = parser.getDepth();
-
-        MessageBuilder message = parseCommonStanzaAttributes(id -> {
-            return StanzaBuilder.buildMessage(id);
-        }, parser, outerXmlEnvironment);
-
+        Message message = new Message();
+        parseCommonStanzaAttributes(message, parser, outerXmlEnvironment);
         String typeString = parser.getAttributeValue("", "type");
         if (typeString != null) {
-            message.ofType(Message.Type.fromString(typeString));
+            message.setType(Message.Type.fromString(typeString));
         }
 
         // Parse sub-elements. We include extra logic to make sure the values
@@ -191,8 +176,9 @@ public class PacketParserUtils {
                     String xmlLangSubject = ParserUtils.getXmlLang(parser);
                     String subject = parseElementText(parser);
 
-                    Message.Subject subjectExtensionElement = new Message.Subject(xmlLangSubject, subject);
-                    message.addExtension(subjectExtensionElement);
+                    if (message.getSubject(xmlLangSubject) == null) {
+                        message.addSubject(xmlLangSubject, subject);
+                    }
                     break;
                 case "thread":
                     if (thread == null) {
@@ -203,8 +189,7 @@ public class PacketParserUtils {
                     message.setError(parseError(parser, messageXmlEnvironment));
                     break;
                  default:
-                    ExtensionElement extensionElement = parseExtensionElement(elementName, namespace, parser, messageXmlEnvironment);
-                    message.addExtension(extensionElement);
+                    PacketParserUtils.addExtensionElement(message, parser, elementName, namespace, messageXmlEnvironment);
                     break;
                 }
                 break;
@@ -223,7 +208,7 @@ public class PacketParserUtils {
         // situations where we have a body element with an explicit xml lang set and once where the value is inherited
         // and both values are equal.
 
-        return message.build();
+        return message;
     }
 
     /**
@@ -238,8 +223,8 @@ public class PacketParserUtils {
      *
      * @param parser TODO javadoc me please
      * @return the textual content of the element as String
-     * @throws XmlPullParserException if an error in the XML parser occurred.
-     * @throws IOException if an I/O error occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
+     * @throws IOException if an I/O error occured.
      */
     public static String parseElementText(XmlPullParser parser) throws XmlPullParserException, IOException {
         assert parser.getEventType() == XmlPullParser.Event.START_ELEMENT;
@@ -277,8 +262,8 @@ public class PacketParserUtils {
      *
      * @param parser the XML pull parser
      * @return the element as string
-     * @throws XmlPullParserException if an error in the XML parser occurred.
-     * @throws IOException if an I/O error occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
+     * @throws IOException if an I/O error occured.
      */
     public static CharSequence parseElement(XmlPullParser parser) throws XmlPullParserException, IOException {
         return parseElement(parser, false);
@@ -316,8 +301,8 @@ public class PacketParserUtils {
      * @param depth TODO javadoc me please
      * @param fullNamespaces TODO javadoc me please
      * @return the content of the current depth
-     * @throws XmlPullParserException if an error in the XML parser occurred.
-     * @throws IOException if an I/O error occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
+     * @throws IOException if an I/O error occured.
      */
     public static CharSequence parseContentDepth(XmlPullParser parser, int depth, boolean fullNamespaces) throws XmlPullParserException, IOException {
         if (parser.supportsRoundtrip()) {
@@ -442,8 +427,8 @@ public class PacketParserUtils {
      * @param parser the XML parser, positioned at the start of a presence packet.
      * @param outerXmlEnvironment the outer XML environment (optional).
      * @return a Presence packet.
-     * @throws IOException if an I/O error occurred.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
+     * @throws IOException if an I/O error occured.
+     * @throws XmlPullParserException if an error in the XML parser occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
      */
     public static Presence parsePresence(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
@@ -451,16 +436,13 @@ public class PacketParserUtils {
         final int initialDepth = parser.getDepth();
         XmlEnvironment presenceXmlEnvironment = XmlEnvironment.from(parser, outerXmlEnvironment);
 
-        PresenceBuilder presence = parseCommonStanzaAttributes(
-                        stanzaId -> StanzaBuilder.buildPresence(stanzaId), parser, outerXmlEnvironment);
-
         Presence.Type type = Presence.Type.available;
         String typeString = parser.getAttributeValue("", "type");
         if (typeString != null && !typeString.equals("")) {
             type = Presence.Type.fromString(typeString);
         }
-
-        presence.ofType(type);
+        Presence presence = new Presence(type);
+        parseCommonStanzaAttributes(presence, parser, outerXmlEnvironment);
 
         // Parse sub-elements
         outerloop: while (true) {
@@ -486,7 +468,9 @@ public class PacketParserUtils {
                         // '<show />' element, which is a invalid XMPP presence
                         // stanza according to RFC 6121 4.7.2.1
                         LOGGER.warning("Empty or null mode text in presence show element form "
-                                        + presence
+                                        + presence.getFrom()
+                                        + " with id '"
+                                        + presence.getStanzaId()
                                         + "' which is invalid according to RFC6121 4.7.2.1");
                     }
                     break;
@@ -498,10 +482,10 @@ public class PacketParserUtils {
                     // Be extra robust: Skip PacketExtensions that cause Exceptions, instead of
                     // failing completely here. See SMACK-390 for more information.
                     try {
-                        ExtensionElement extensionElement = parseExtensionElement(elementName, namespace, parser, presenceXmlEnvironment);
-                        presence.addExtension(extensionElement);
+                        PacketParserUtils.addExtensionElement(presence, parser, elementName, namespace, presenceXmlEnvironment);
                     } catch (Exception e) {
-                        LOGGER.log(Level.WARNING, "Failed to parse extension element in Presence stanza: " + presence, e);
+                        LOGGER.warning("Failed to parse extension element in Presence stanza: \"" + e + "\" from: '"
+                                        + presence.getFrom() + " id: '" + presence.getStanzaId() + "'");
                     }
                     break;
                 }
@@ -516,8 +500,7 @@ public class PacketParserUtils {
                 break;
             }
         }
-
-        return presence.build();
+        return presence;
     }
 
     public static IQ parseIQ(XmlPullParser parser) throws Exception {
@@ -530,9 +513,9 @@ public class PacketParserUtils {
      * @param parser the XML parser, positioned at the start of an IQ packet.
      * @param outerXmlEnvironment the outer XML environment (optional).
      * @return an IQ object.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
      * @throws XmppStringprepException if the provided string is invalid.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
      */
     public static IQ parseIQ(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, XmppStringprepException, IOException, SmackParsingException {
@@ -540,19 +523,12 @@ public class PacketParserUtils {
         final int initialDepth = parser.getDepth();
         XmlEnvironment iqXmlEnvironment = XmlEnvironment.from(parser, outerXmlEnvironment);
         IQ iqPacket = null;
-        StanzaError error = null;
+        StanzaError.Builder error = null;
 
         final String id = parser.getAttributeValue("", "id");
-        IqData iqData = StanzaBuilder.buildIqData(id);
-
         final Jid to = ParserUtils.getJidAttribute(parser, "to");
-        iqData.to(to);
-
         final Jid from = ParserUtils.getJidAttribute(parser, "from");
-        iqData.from(from);
-
         final IQ.Type type = IQ.Type.fromString(parser.getAttributeValue("", "type"));
-        iqData.ofType(type);
 
         outerloop: while (true) {
             XmlPullParser.Event eventType = parser.next();
@@ -568,9 +544,9 @@ public class PacketParserUtils {
                 // Otherwise, see if there is a registered provider for
                 // this element name and namespace.
                 default:
-                    IqProvider<IQ> provider = ProviderManager.getIQProvider(elementName, namespace);
+                    IQProvider<IQ> provider = ProviderManager.getIQProvider(elementName, namespace);
                     if (provider != null) {
-                            iqPacket = provider.parse(parser, iqData, outerXmlEnvironment);
+                            iqPacket = provider.parse(parser, outerXmlEnvironment);
                     }
                     // Note that if we reach this code, it is guranteed that the result IQ contained a child element
                     // (RFC 6120 § 8.2.3 6) because otherwhise we would have reached the END_ELEMENT first.
@@ -622,8 +598,8 @@ public class PacketParserUtils {
      *
      * @param parser the XML parser, positioned at the start of the mechanisms stanza.
      * @return a collection of Stings with the mechanisms included in the mechanisms stanza.
-     * @throws IOException if an I/O error occurred.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
+     * @throws IOException if an I/O error occured.
+     * @throws XmlPullParserException if an error in the XML parser occured.
      */
     public static Collection<String> parseMechanisms(XmlPullParser parser)
                     throws XmlPullParserException, IOException {
@@ -652,7 +628,7 @@ public class PacketParserUtils {
      *
      * @param parser the XML parser, positioned at the start of the compression stanza.
      * @return The CompressionFeature stream element
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      * @throws XmlPullParserException if an exception occurs while parsing the stanza.
      */
     public static Compress.Feature parseCompressionFeature(XmlPullParser parser)
@@ -719,8 +695,8 @@ public class PacketParserUtils {
      * @param parser the XML parser.
      * @param outerXmlEnvironment the outer XML environment (optional).
      * @return an stream error packet.
-     * @throws IOException if an I/O error occurred.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
+     * @throws IOException if an I/O error occured.
+     * @throws XmlPullParserException if an error in the XML parser occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
      */
     public static StreamError parseStreamError(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
@@ -771,7 +747,7 @@ public class PacketParserUtils {
         return new StreamError(condition, conditionText, descriptiveTexts, extensions);
     }
 
-    public static StanzaError parseError(XmlPullParser parser) throws XmlPullParserException, IOException, SmackParsingException {
+    public static StanzaError.Builder parseError(XmlPullParser parser) throws XmlPullParserException, IOException, SmackParsingException {
         return parseError(parser, null);
     }
 
@@ -781,11 +757,11 @@ public class PacketParserUtils {
      * @param parser the XML parser.
      * @param outerXmlEnvironment the outer XML environment (optional).
      * @return an error sub-packet.
-     * @throws IOException if an I/O error occurred.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
+     * @throws IOException if an I/O error occured.
+     * @throws XmlPullParserException if an error in the XML parser occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
      */
-    public static StanzaError parseError(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
+    public static StanzaError.Builder parseError(XmlPullParser parser, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
         final int initialDepth = parser.getDepth();
         Map<String, String> descriptiveTexts = null;
         XmlEnvironment stanzaErrorXmlEnvironment = XmlEnvironment.from(parser, outerXmlEnvironment);
@@ -832,8 +808,7 @@ public class PacketParserUtils {
             }
         }
         builder.setExtensions(extensions).setDescriptiveTexts(descriptiveTexts);
-
-        return builder.build();
+        return builder;
     }
 
     /**
@@ -845,8 +820,8 @@ public class PacketParserUtils {
      * @param outerXmlEnvironment the outer XML environment (optional).
      *
      * @return an extension element.
-     * @throws XmlPullParserException if an error in the XML parser occurred.
-     * @throws IOException if an I/O error occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
+     * @throws IOException if an I/O error occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
      */
     public static ExtensionElement parseExtensionElement(String elementName, String namespace,
@@ -923,18 +898,6 @@ public class PacketParserUtils {
         return new Session.Feature(optional);
     }
 
-    public static void addExtensionElement(StanzaBuilder<?> stanzaBuilder, XmlPullParser parser, XmlEnvironment outerXmlEnvironment)
-                    throws XmlPullParserException, IOException, SmackParsingException {
-        ParserUtils.assertAtStartTag(parser);
-        addExtensionElement(stanzaBuilder, parser, parser.getName(), parser.getNamespace(), outerXmlEnvironment);
-    }
-
-    public static void addExtensionElement(StanzaBuilder<?> stanzaBuilder, XmlPullParser parser, String elementName,
-            String namespace, XmlEnvironment outerXmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
-        ExtensionElement extensionElement = parseExtensionElement(elementName, namespace, parser, outerXmlEnvironment);
-        stanzaBuilder.addExtension(extensionElement);
-    }
-
     public static void addExtensionElement(Stanza packet, XmlPullParser parser, XmlEnvironment outerXmlEnvironment)
                     throws XmlPullParserException, IOException, SmackParsingException {
         ParserUtils.assertAtStartTag(parser);

smack-core/src/main/java/org/jivesoftware/smack/util/Predicate.java

@@ -1,24 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.util;
-
-// TODO: Replace with java.util.function.Predicate once Smack's minimum Android SDK level is 24 or higher.
-public interface Predicate<T> {
-
-    boolean test(T t);
-
-}

smack-core/src/main/java/org/jivesoftware/smack/util/StringUtils.java

@@ -427,13 +427,6 @@ public class StringUtils {
         return true;
     }
 
-    public static boolean isNullOrNotEmpty(CharSequence cs) {
-        if (cs == null) {
-            return true;
-        }
-        return !cs.toString().isEmpty();
-    }
-
     /**
      * Returns true if the given CharSequence is empty.
      *
@@ -463,11 +456,6 @@ public class StringUtils {
      */
     public static StringBuilder toStringBuilder(Collection<? extends Object> collection, String delimiter) {
         StringBuilder sb = new StringBuilder(collection.size() * 20);
-        appendTo(collection, delimiter, sb);
-        return sb;
-    }
-
-    public static void appendTo(Collection<? extends Object> collection, String delimiter, StringBuilder sb) {
         for (Iterator<? extends Object> it = collection.iterator(); it.hasNext();) {
             Object cs = it.next();
             sb.append(cs);
@@ -475,6 +463,7 @@ public class StringUtils {
                 sb.append(delimiter);
             }
         }
+        return sb;
     }
 
     public static String returnIfNotEmptyTrimmed(String string) {
@@ -535,7 +524,7 @@ public class StringUtils {
         if (cs == null) {
             return null;
         }
-        if (isEmpty(cs)) {
+        if (cs.toString().isEmpty()) {
             throw new IllegalArgumentException(message);
         }
         return cs;

smack-core/src/main/java/org/jivesoftware/smack/util/ToStringUtil.java

@@ -1,75 +0,0 @@
-/**
- *
- * Copyright 2019 Florian Schmaus
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.jivesoftware.smack.util;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.List;
-
-public class ToStringUtil {
-
-    public static Builder builderFor(Class<?> clazz) {
-        StringBuilder sb = new StringBuilder();
-        sb.append(clazz.getSimpleName()).append('(');
-        return new Builder(sb);
-    }
-
-    public static final class Builder {
-        private final StringBuilder sb;
-
-        private Builder(StringBuilder sb) {
-            this.sb = sb;
-        }
-
-        public Builder addValue(String name, Object value) {
-            if (value == null) {
-                return this;
-            }
-            if (sb.charAt(sb.length() - 1) != '(') {
-                sb.append(' ');
-            }
-            sb.append(name).append("='").append(value).append('\'');
-            return this;
-        }
-
-        public <V> Builder add(String name, Collection<? extends V> values, Function<?, V> toStringFunction) {
-            if (values.isEmpty()) {
-                return this;
-            }
-
-            sb.append(' ').append(name).append('[');
-
-            List<String> stringValues = new ArrayList<>(values.size());
-            for (V value : values) {
-                String valueString = toStringFunction.apply(value).toString();
-                stringValues.add(valueString);
-            }
-
-            StringUtils.appendTo(stringValues, ", ", sb);
-
-            sb.append(']');
-
-            return this;
-        }
-
-        public String build() {
-            sb.append(')');
-
-            return sb.toString();
-        }
-    }
-}

smack-core/src/main/java/org/jivesoftware/smack/util/XmlStringBuilder.java

@@ -628,7 +628,7 @@ public class XmlStringBuilder implements Appendable, CharSequence, Element {
      *
      * @param writer TODO javadoc me please
      * @param enclosingXmlEnvironment the enclosing XML environment.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      */
     public void write(Writer writer, XmlEnvironment enclosingXmlEnvironment) throws IOException {
         try {

smack-core/src/main/java/org/jivesoftware/smack/util/XmppElementUtil.java

@@ -16,9 +16,6 @@
  */
 package org.jivesoftware.smack.util;
 
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
 import java.util.logging.Logger;
 
 import javax.xml.namespace.QName;
@@ -55,21 +52,4 @@ public class XmppElementUtil {
         return new QName(namespace, element);
     }
 
-    public static <E extends FullyQualifiedElement, R extends FullyQualifiedElement> List<R> getElementsFrom(
-                    MultiMap<QName, E> elementMap, Class<R> extensionElementClass) {
-        QName qname = XmppElementUtil.getQNameFor(extensionElementClass);
-
-        List<E> extensionElements = elementMap.getAll(qname);
-
-        if (extensionElements.isEmpty()) {
-            return Collections.emptyList();
-        }
-
-        List<R> res = new ArrayList<>(extensionElements.size());
-        for (E extensionElement : extensionElements) {
-            R e = extensionElementClass.cast(extensionElement);
-            res.add(e);
-        }
-        return res;
-    }
 }

smack-core/src/test/java/org/jivesoftware/smack/filter/FromMatchesFilterTest.java

@@ -19,8 +19,8 @@ package org.jivesoftware.smack.filter;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
+import org.jivesoftware.smack.packet.Message;
 import org.jivesoftware.smack.packet.Stanza;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 
 import org.junit.Test;
 import org.jxmpp.jid.EntityFullJid;
@@ -47,7 +47,7 @@ public class FromMatchesFilterTest {
     @Test
     public void autoCompareMatchingEntityFullJid() {
         FromMatchesFilter filter = FromMatchesFilter.create(FULL_JID1_R1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(FULL_JID1_R1);
         assertTrue(filter.accept(packet));
@@ -71,7 +71,7 @@ public class FromMatchesFilterTest {
     @Test
     public void autoCompareMatchingBaseJid() {
         FromMatchesFilter filter = FromMatchesFilter.create(BASE_JID1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(BASE_JID1);
         assertTrue(filter.accept(packet));
@@ -95,7 +95,7 @@ public class FromMatchesFilterTest {
     @Test
     public void autoCompareMatchingServiceJid() {
         FromMatchesFilter filter = FromMatchesFilter.create(SERVICE_JID1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(SERVICE_JID1);
         assertTrue(filter.accept(packet));
@@ -116,7 +116,7 @@ public class FromMatchesFilterTest {
     @Test
     public void bareCompareMatchingEntityFullJid() {
         FromMatchesFilter filter = FromMatchesFilter.createBare(FULL_JID1_R1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(BASE_JID1);
         assertTrue(filter.accept(packet));
@@ -140,7 +140,7 @@ public class FromMatchesFilterTest {
     @Test
     public void bareCompareMatchingBaseJid() {
         FromMatchesFilter filter = FromMatchesFilter.createBare(BASE_JID1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(BASE_JID1);
         assertTrue(filter.accept(packet));
@@ -164,7 +164,7 @@ public class FromMatchesFilterTest {
     @Test
     public void bareCompareMatchingServiceJid() {
         FromMatchesFilter filter = FromMatchesFilter.createBare(SERVICE_JID1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(SERVICE_JID1);
         assertTrue(filter.accept(packet));
@@ -185,7 +185,7 @@ public class FromMatchesFilterTest {
     @Test
     public void fullCompareMatchingEntityFullJid() {
         FromMatchesFilter filter = FromMatchesFilter.createFull(FULL_JID1_R1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(FULL_JID1_R1);
         assertTrue(filter.accept(packet));
@@ -209,7 +209,7 @@ public class FromMatchesFilterTest {
     @Test
     public void fullCompareMatchingBaseJid() {
         FromMatchesFilter filter = FromMatchesFilter.createFull(BASE_JID1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(BASE_JID1);
         assertTrue(filter.accept(packet));
@@ -233,7 +233,7 @@ public class FromMatchesFilterTest {
     @Test
     public void fullCompareMatchingServiceJid() {
         FromMatchesFilter filter = FromMatchesFilter.createFull(SERVICE_JID1);
-        Stanza packet = StanzaBuilder.buildMessage().build();
+        Stanza packet = new Message();
 
         packet.setFrom(SERVICE_JID1);
         assertTrue(filter.accept(packet));

smack-core/src/test/java/org/jivesoftware/smack/packet/IQResponseTest.java

@@ -62,7 +62,7 @@ public class IQResponseTest {
      */
     @Test
     public void testGeneratingValidErrorResponse() throws XmppStringprepException {
-        final StanzaError error = StanzaError.getBuilder(StanzaError.Condition.bad_request).build();
+        final StanzaError.Builder error = StanzaError.getBuilder(StanzaError.Condition.bad_request);
         final IQ request = new TestIQ(ELEMENT, NAMESPACE);
 
         request.setType(IQ.Type.set);
@@ -75,7 +75,7 @@ public class IQResponseTest {
         assertNotNull(result.getStanzaId());
         assertEquals(request.getStanzaId(), result.getStanzaId());
         assertEquals(request.getFrom(), result.getTo());
-        assertEquals(error.toXML().toString(), result.getError().toXML().toString());
+        assertEquals(error.build().toXML().toString(), result.getError().toXML().toString());
         // TODO this test was never valid
         // assertEquals(CHILD_ELEMENT, result.getChildElementXML());
     }
@@ -110,7 +110,7 @@ public class IQResponseTest {
      */
     @Test
     public void testGeneratingErrorBasedOnError() throws XmppStringprepException {
-        final StanzaError error = StanzaError.getBuilder(StanzaError.Condition.bad_request).build();
+        final StanzaError.Builder error = StanzaError.getBuilder(StanzaError.Condition.bad_request);
         final IQ request = new TestIQ(ELEMENT, NAMESPACE);
 
         request.setType(IQ.Type.error);

smack-core/src/test/java/org/jivesoftware/smack/packet/MessageTest.java

@@ -18,6 +18,7 @@ package org.jivesoftware.smack.packet;
 
 import static org.jivesoftware.smack.test.util.XmlUnitUtils.assertXmlSimilar;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import java.io.IOException;
@@ -43,12 +44,10 @@ public class MessageTest {
                 .append("</message>");
         String control = controlBuilder.toString();
 
-        Message messageBuildWithBuilder = StanzaBuilder.buildMessage()
-                        .ofType(Message.Type.chat)
-                        .build();
-
-        assertEquals(type, messageBuildWithBuilder.getType());
-        assertXmlSimilar(control, messageBuildWithBuilder.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+        Message messageTypeInConstructor = new Message(null, Message.Type.chat);
+        messageTypeInConstructor.setStanzaId(null);
+        assertEquals(type, messageTypeInConstructor.getType());
+        assertXmlSimilar(control, messageTypeInConstructor.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
 
         controlBuilder = new StringBuilder();
         controlBuilder.append("<message")
@@ -58,18 +57,16 @@ public class MessageTest {
                 .append("</message>");
         control = controlBuilder.toString();
 
-        Message messageTypeSet = StanzaBuilder.buildMessage()
-                        .ofType(type2)
-                        .build();
+        Message messageTypeSet = getNewMessage();
+        messageTypeSet.setType(type2);
         assertEquals(type2, messageTypeSet.getType());
         assertXmlSimilar(control, messageTypeSet.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 
     @Test(expected = NullPointerException.class)
     public void setNullMessageBodyTest() {
-        StanzaBuilder.buildMessage()
-                        .addBody(null, null)
-                        .build();
+        Message message = getNewMessage();
+        message.addBody(null, null);
     }
 
     @Test
@@ -84,9 +81,9 @@ public class MessageTest {
                 .append("</message>");
         String control = controlBuilder.toString();
 
-        Message message = StanzaBuilder.buildMessage()
-                        .setSubject(messageSubject)
-                        .build();
+        Message message = getNewMessage();
+        message.setSubject(messageSubject);
+
         assertEquals(messageSubject, message.getSubject());
         assertXmlSimilar(control, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
@@ -103,9 +100,9 @@ public class MessageTest {
                 .append("</message>");
         String control = controlBuilder.toString();
 
-        Message message = StanzaBuilder.buildMessage()
-                        .setBody(messageBody)
-                        .build();
+        Message message = getNewMessage();
+        message.setBody(messageBody);
+
         assertEquals(messageBody, message.getBody());
         assertXmlSimilar(control, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
@@ -136,11 +133,10 @@ public class MessageTest {
                 .append("</message>");
         String control = controlBuilder.toString();
 
-        Message message = StanzaBuilder.buildMessage()
-                        .addBody(null, messageBody1)
-                        .addBody(lang2, messageBody2)
-                        .addBody(lang3, messageBody3)
-                        .build();
+        Message message = getNewMessage();
+        message.addBody(null, messageBody1);
+        message.addBody(lang2, messageBody2);
+        message.addBody(lang3, messageBody3);
         assertXmlSimilar(control, message.toXML(StreamOpen.CLIENT_NAMESPACE));
 
         Collection<String> languages = message.getBodyLanguages();
@@ -152,20 +148,21 @@ public class MessageTest {
     }
 
     @Test
-    public void simpleMessageBodyTest() {
-        Message message = StanzaBuilder.buildMessage()
-                        .setBody("test")
-                        .build();
+    public void removeMessageBodyTest() {
+        Message message = getNewMessage();
+        message.setBody("test");
         assertTrue(message.getBodies().size() == 1);
 
-        message = StanzaBuilder.buildMessage().build();
+        message.setBody(null);
         assertTrue(message.getBodies().size() == 0);
 
+        assertFalse(message.removeBody("sp"));
 
-        message = StanzaBuilder.buildMessage()
-                        .addBody("es", "test")
-                        .build();
+        Message.Body body = message.addBody("es", "test");
         assertTrue(message.getBodies().size() == 1);
+
+        message.removeBody(body);
+        assertTrue(message.getBodies().size() == 0);
     }
 
     @Test
@@ -180,9 +177,8 @@ public class MessageTest {
                 .append("</message>");
         String control = controlBuilder.toString();
 
-        Message message = StanzaBuilder.buildMessage()
-                        .setThread(messageThread)
-                        .build();
+        Message message = getNewMessage();
+        message.setThread(messageThread);
 
         assertEquals(messageThread, message.getThread());
         assertXmlSimilar(control, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
@@ -200,10 +196,15 @@ public class MessageTest {
                 .append("</message>");
         String control = controlBuilder.toString();
 
-        Message message = StanzaBuilder.buildMessage()
-                        .setLanguage(lang)
-                        .build();
+        Message message = getNewMessage();
+        message.setLanguage(lang);
 
         assertXmlSimilar(control, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
+
+    private static Message getNewMessage() {
+        Message message = new Message();
+        message.setStanzaId(null);
+        return message;
+    }
 }

smack-core/src/test/java/org/jivesoftware/smack/packet/PresenceTest.java

@@ -41,9 +41,8 @@ public class PresenceTest {
                 .append("</presence>");
         String control = controlBuilder.toString();
 
-        Presence presenceTypeInConstructor = StanzaBuilder.buildPresence()
-                        .ofType(type)
-                        .build();
+        Presence presenceTypeInConstructor = new Presence(type);
+        presenceTypeInConstructor.setStanzaId(null);
         assertEquals(type, presenceTypeInConstructor.getType());
         assertXmlSimilar(control, presenceTypeInConstructor.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
 
@@ -55,27 +54,27 @@ public class PresenceTest {
                 .append("</presence>");
         control = controlBuilder.toString();
 
-        PresenceBuilder presenceTypeSet = getNewPresence();
-        presenceTypeSet.ofType(type2);
+        Presence presenceTypeSet = getNewPresence();
+        presenceTypeSet.setType(type2);
         assertEquals(type2, presenceTypeSet.getType());
-        assertXmlSimilar(control, presenceTypeSet.build().toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+        assertXmlSimilar(control, presenceTypeSet.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 
     @Test
     public void setNullPresenceTypeTest() {
         assertThrows(IllegalArgumentException.class, () ->
-        getNewPresence().ofType(null)
+        getNewPresence().setType(null)
         );
     }
 
     @Test
     public void isPresenceAvailableTest() {
-        PresenceBuilder presence = getNewPresence();
-        presence.ofType(Presence.Type.available);
-        assertTrue(presence.build().isAvailable());
+        Presence presence = getNewPresence();
+        presence.setType(Presence.Type.available);
+        assertTrue(presence.isAvailable());
 
-        presence.ofType(Presence.Type.unavailable);
-        assertFalse(presence.build().isAvailable());
+        presence.setType(Presence.Type.unavailable);
+        assertFalse(presence.isAvailable());
     }
 
     @Test
@@ -90,11 +89,11 @@ public class PresenceTest {
                 .append("</presence>");
         String control = controlBuilder.toString();
 
-        PresenceBuilder presence = getNewPresence();
+        Presence presence = getNewPresence();
         presence.setStatus(status);
 
         assertEquals(status, presence.getStatus());
-        assertXmlSimilar(control, presence.build().toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+        assertXmlSimilar(control, presence.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 
     @Test
@@ -109,11 +108,11 @@ public class PresenceTest {
                 .append("</presence>");
         String control = controlBuilder.toString();
 
-        PresenceBuilder presence = getNewPresence();
+        Presence presence = getNewPresence();
         presence.setPriority(priority);
 
         assertEquals(priority, presence.getPriority());
-        assertXmlSimilar(control, presence.build().toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+        assertXmlSimilar(control, presence.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 
     @Test
@@ -144,14 +143,11 @@ public class PresenceTest {
                 .append("</presence>");
         String control = controlBuilder.toString();
 
-        Presence presenceBuildWithBuilder = StanzaBuilder.buildPresence()
-                        .ofType(Presence.Type.available)
-                        .setStatus(status)
-                        .setPriority(priority)
-                        .setMode(mode1)
-                        .build();
-        assertEquals(mode1, presenceBuildWithBuilder.getMode());
-        assertXmlSimilar(control, presenceBuildWithBuilder.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+        Presence presenceModeInConstructor = new Presence(Presence.Type.available, status, priority,
+                mode1);
+        presenceModeInConstructor.setStanzaId(null);
+        assertEquals(mode1, presenceModeInConstructor.getMode());
+        assertXmlSimilar(control, presenceModeInConstructor.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
 
         controlBuilder = new StringBuilder();
         controlBuilder.append("<presence>")
@@ -161,20 +157,20 @@ public class PresenceTest {
                 .append("</presence>");
        control = controlBuilder.toString();
 
-        PresenceBuilder presenceModeSet = getNewPresence();
+        Presence presenceModeSet = getNewPresence();
         presenceModeSet.setMode(mode2);
         assertEquals(mode2, presenceModeSet.getMode());
-        assertXmlSimilar(control, presenceModeSet.build().toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+        assertXmlSimilar(control, presenceModeSet.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 
     @Test
     public void isModeAwayTest() {
-        PresenceBuilder presence = getNewPresence();
+        Presence presence = getNewPresence();
         presence.setMode(Presence.Mode.away);
-        assertTrue(presence.build().isAway());
+        assertTrue(presence.isAway());
 
         presence.setMode(Presence.Mode.chat);
-        assertFalse(presence.build().isAway());
+        assertFalse(presence.isAway());
     }
 
     @Test
@@ -189,14 +185,15 @@ public class PresenceTest {
                 .append("</presence>");
         String control = controlBuilder.toString();
 
-        PresenceBuilder presence = getNewPresence();
+        Presence presence = getNewPresence();
         presence.setLanguage(lang);
 
-        assertXmlSimilar(control, presence.build().toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+        assertXmlSimilar(control, presence.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 
-    private static PresenceBuilder getNewPresence() {
-        PresenceBuilder presence = StanzaBuilder.buildPresence().ofType(Presence.Type.available);
+    private static Presence getNewPresence() {
+        Presence presence = new Presence(Presence.Type.available);
+        presence.setStanzaId(null);
         return presence;
     }
 }

smack-core/src/test/java/org/jivesoftware/smack/packet/ToStringTest.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2016-2019 Florian Schmaus
+ * Copyright © 2016-2017 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -18,6 +18,8 @@ package org.jivesoftware.smack.packet;
 
 import static org.junit.Assert.assertEquals;
 
+import org.jivesoftware.smack.packet.Presence.Mode;
+
 import org.junit.Test;
 import org.jxmpp.jid.JidTestUtil;
 
@@ -25,21 +27,15 @@ public class ToStringTest {
 
     @Test
     public void messageTest() {
-        Message message = StanzaBuilder.buildMessage("message-id")
-                        .ofType(Message.Type.headline)
-                        .to(JidTestUtil.BARE_JID_1)
-                        .build();
+        Message message = new Message(JidTestUtil.BARE_JID_1, Message.Type.headline);
+        message.setStanzaId("message-id");
         String string = message.toString();
         assertEquals("Message Stanza [to=one@exampleone.org,id=message-id,type=headline,]", string);
     }
 
     @Test
     public void presenceTest() {
-        Presence presence = StanzaBuilder.buildPresence()
-                        .ofType(Presence.Type.subscribe)
-                        .setPriority(0)
-                        .setMode(Presence.Mode.away)
-                        .build();
+        Presence presence = new Presence(Presence.Type.subscribe, null, 0, Mode.away);
         presence.setStanzaId("presence-id");
         String string = presence.toString();
         assertEquals("Presence Stanza [id=presence-id,type=subscribe,mode=away,prio=0,]", string);

smack-core/src/test/java/org/jivesoftware/smack/packet/XMPPErrorTest.java

@@ -16,13 +16,12 @@
  */
 package org.jivesoftware.smack.packet;
 
+import static org.jivesoftware.smack.packet.StanzaError.Condition;
+import static org.jivesoftware.smack.packet.StanzaError.Type;
 import static org.junit.Assert.assertEquals;
 
 import java.util.Map;
 
-import org.jivesoftware.smack.packet.StanzaError.Condition;
-import org.jivesoftware.smack.packet.StanzaError.Type;
-
 import org.junit.Test;
 
 public class XMPPErrorTest {

smack-core/src/test/java/org/jivesoftware/smack/util/PacketParserUtilsTest.java

@@ -45,6 +45,7 @@ import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
 
 import com.jamesmurty.utils.XMLBuilder;
+
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
@@ -546,6 +547,30 @@ public class PacketParserUtilsTest {
         assertTrue(message.getSubjectLanguages().contains(otherLanguage));
         assertXmlSimilar(control, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
 
+        // message has default language, first subject no language, second subject default language
+        control = XMLBuilder.create("message")
+            .a("from", "romeo@montague.lit/orchard")
+            .a("to", "juliet@capulet.lit/balcony")
+            .a("id", "zid615d9")
+            .a("type", "chat")
+            .a("xml:lang", defaultLanguage)
+            .e("subject")
+                .t(defaultLanguage)
+            .up()
+            .e("subject")
+                .a("xml:lang", defaultLanguage)
+                .t(defaultLanguage + "2")
+            .asString(outputProperties);
+
+        message = PacketParserUtils
+                        .parseMessage(PacketParserUtils.getParserFor(control));
+
+        assertEquals(defaultLanguage, message.getSubject());
+        assertEquals(defaultLanguage, message.getSubject(defaultLanguage));
+        assertEquals(1, message.getSubjects().size());
+        assertEquals(0, message.getSubjectLanguages().size());
+        assertXmlNotSimilar(control, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
+
         // message has non-default language, first subject no language, second subject default language
         control = XMLBuilder.create("message")
             .a("from", "romeo@montague.lit/orchard")
@@ -842,7 +867,7 @@ public class PacketParserUtilsTest {
             .element("text", StanzaError.ERROR_CONDITION_AND_TEXT_NAMESPACE).t(text).up()
             .asString();
         XmlPullParser parser = TestUtils.getParser(errorXml);
-        StanzaError error = PacketParserUtils.parseError(parser);
+        StanzaError error = PacketParserUtils.parseError(parser).build();
         assertEquals(text, error.getDescriptiveText());
     }
 }

smack-experimental/src/main/java/org/jivesoftware/smackx/chat_markers/ChatMarkersManager.java

@@ -120,10 +120,18 @@ public final class ChatMarkersManager extends Manager {
 
         chatManager = ChatManager.getInstanceFor(connection);
 
-        connection.addMessageInterceptor(mb -> mb.addExtension(ChatMarkersElements.MarkableExtension.INSTANCE),
-                m -> {
-                    return OUTGOING_MESSAGE_FILTER.accept(m);
-            });
+        connection.addStanzaInterceptor(new StanzaListener() {
+            @Override
+            public void processStanza(Stanza packet)
+                    throws
+                    NotConnectedException,
+                    InterruptedException,
+                    SmackException.NotLoggedInException {
+                Message message = (Message) packet;
+                // add a markable extension
+                message.addExtension(ChatMarkersElements.MarkableExtension.INSTANCE);
+            }
+        }, OUTGOING_MESSAGE_FILTER);
 
         connection.addSyncStanzaListener(new StanzaListener() {
             @Override

smack-experimental/src/main/java/org/jivesoftware/smackx/dox/DnsOverXmppManager.java

@@ -88,11 +88,10 @@ public final class DnsOverXmppManager extends Manager {
             try {
                 response = resolver.resolve(query);
             } catch (IOException exception) {
-                StanzaError errorBuilder = StanzaError.getBuilder()
+                StanzaError.Builder errorBuilder = StanzaError.getBuilder()
                         .setType(Type.CANCEL)
                         .setCondition(Condition.internal_server_error)
                         .setDescriptiveEnText("Exception while resolving your DNS query", exception)
-                        .build()
                         ;
 
                 IQ errorResponse = IQ.createErrorResponse(iqRequest, errorBuilder);

smack-experimental/src/main/java/org/jivesoftware/smackx/eme/element/ExplicitMessageEncryptionElement.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2017-2019 Florian Schmaus
+ * Copyright 2017 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,12 +20,8 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
-import javax.xml.namespace.QName;
-
 import org.jivesoftware.smack.packet.ExtensionElement;
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
-import org.jivesoftware.smack.packet.MessageView;
 import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smack.util.XmlStringBuilder;
 
@@ -37,8 +33,6 @@ public class ExplicitMessageEncryptionElement implements ExtensionElement {
 
     public static final String NAMESPACE = "urn:xmpp:eme:0";
 
-    public static final QName QNAME = new QName(NAMESPACE, ELEMENT);
-
     public enum ExplicitMessageEncryptionProtocol {
 
         /**
@@ -160,12 +154,14 @@ public class ExplicitMessageEncryptionElement implements ExtensionElement {
      * @param protocolNamespace namespace
      * @return true if message has EME element for that namespace, otherwise false
      */
-    public static boolean hasProtocol(MessageView message, String protocolNamespace) {
-        List<ExplicitMessageEncryptionElement> emeElements = message
-                .getExtensions(ExplicitMessageEncryptionElement.class);
+    public static boolean hasProtocol(Message message, String protocolNamespace) {
+        List<ExtensionElement> extensionElements = message.getExtensions(
+                ExplicitMessageEncryptionElement.ELEMENT,
+                ExplicitMessageEncryptionElement.NAMESPACE);
 
-        for (ExplicitMessageEncryptionElement emeElement : emeElements) {
-            if (emeElement.getEncryptionNamespace().equals(protocolNamespace)) {
+        for (ExtensionElement extensionElement : extensionElements) {
+            ExplicitMessageEncryptionElement e = (ExplicitMessageEncryptionElement) extensionElement;
+            if (e.getEncryptionNamespace().equals(protocolNamespace)) {
                 return true;
             }
         }
@@ -180,7 +176,7 @@ public class ExplicitMessageEncryptionElement implements ExtensionElement {
      * @param protocol protocol
      * @return true if message has EME element for that namespace, otherwise false
      */
-    public static boolean hasProtocol(MessageView message, ExplicitMessageEncryptionProtocol protocol) {
+    public static boolean hasProtocol(Message message, ExplicitMessageEncryptionProtocol protocol) {
         return hasProtocol(message, protocol.namespace);
     }
 
@@ -188,10 +184,10 @@ public class ExplicitMessageEncryptionElement implements ExtensionElement {
      * Add an EME element containing the specified {@code protocol} namespace to the message.
      * In case there is already an element with that protocol, we do nothing.
      *
-     * @param message a message builder.
+     * @param message message
      * @param protocol encryption protocol
      */
-    public static void set(MessageBuilder message, ExplicitMessageEncryptionProtocol protocol) {
+    public static void set(Message message, ExplicitMessageEncryptionProtocol protocol) {
         if (!hasProtocol(message, protocol.namespace)) {
             message.addExtension(new ExplicitMessageEncryptionElement(protocol));
         }

smack-experimental/src/main/java/org/jivesoftware/smackx/hashes/HashManager.java

@@ -43,7 +43,6 @@ import java.util.WeakHashMap;
 import org.jivesoftware.smack.Manager;
 import org.jivesoftware.smack.XMPPConnection;
 import org.jivesoftware.smack.util.SecurityUtil;
-
 import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
 import org.jivesoftware.smackx.hashes.element.HashElement;
 

smack-experimental/src/main/java/org/jivesoftware/smackx/hints/element/StoreHint.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2017-2019 Florian Schmaus
+ * Copyright 2017 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,10 +16,7 @@
  */
 package org.jivesoftware.smackx.hints.element;
 
-import javax.xml.namespace.QName;
-
-import org.jivesoftware.smack.packet.MessageBuilder;
-import org.jivesoftware.smack.packet.MessageView;
+import org.jivesoftware.smack.packet.Message;
 
 /**
  * A "store" hint. Messages with this hint should be stored in permanent stores or archives.
@@ -32,8 +29,6 @@ public final class StoreHint extends MessageProcessingHint {
 
     public static final String ELEMENT = "store";
 
-    public static final QName QNAME = new QName(NAMESPACE, ELEMENT);
-
     private StoreHint() {
     }
 
@@ -52,15 +47,15 @@ public final class StoreHint extends MessageProcessingHint {
         return MessageProcessingHintType.store;
     }
 
-    public static StoreHint from(MessageView message) {
-        return message.getExtension(QNAME);
+    public static StoreHint from(Message message) {
+        return message.getExtension(ELEMENT, NAMESPACE);
     }
 
-    public static boolean hasHint(MessageView message) {
+    public static boolean hasHint(Message message) {
         return from(message) != null;
     }
 
-    public static void set(MessageBuilder message) {
+    public static void set(Message message) {
         message.overrideExtension(INSTANCE);
     }
 }

smack-experimental/src/main/java/org/jivesoftware/smackx/hoxt/provider/AbstractHttpOverXmppProvider.java

@@ -55,8 +55,8 @@ public abstract class AbstractHttpOverXmppProvider<H extends AbstractHttpOverXmp
      *
      * @param parser parser
      * @return HeadersExtension or null if no headers
-     * @throws XmlPullParserException if an error in the XML parser occurred.
-     * @throws IOException if an I/O error occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
+     * @throws IOException if an I/O error occured.
      * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
      */
     protected HeadersExtension parseHeaders(XmlPullParser parser) throws IOException, XmlPullParserException, SmackParsingException {
@@ -76,8 +76,8 @@ public abstract class AbstractHttpOverXmppProvider<H extends AbstractHttpOverXmp
      * @param parser parser
      * @return Data or null if no data
      *
-     * @throws XmlPullParserException if an error in the XML parser occurred.
-     * @throws IOException if an I/O error occurred.
+     * @throws XmlPullParserException if an error in the XML parser occured.
+     * @throws IOException if an I/O error occured.
      */
     protected AbstractHttpOverXmpp.Data parseData(XmlPullParser parser) throws XmlPullParserException, IOException {
         NamedElement child = null;

smack-experimental/src/main/java/org/jivesoftware/smackx/httpfileupload/HttpFileUploadManager.java

@@ -251,7 +251,7 @@ public final class HttpFileUploadManager extends Manager {
      * @throws InterruptedException if the calling thread was interrupted.
      * @throws XMPPException.XMPPErrorException if there was an XMPP error returned.
      * @throws SmackException if Smack detected an exceptional situation.
-     * @throws IOException if an I/O error occurred.
+     * @throws IOException if an I/O error occured.
      */
     public URL uploadFile(File file, UploadProgressListener listener) throws InterruptedException,
             XMPPException.XMPPErrorException, SmackException, IOException {

smack-experimental/src/main/java/org/jivesoftware/smackx/iot/control/element/IoTSetResponse.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2016-2019 Florian Schmaus
+ * Copyright © 2016 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,26 +16,20 @@
  */
 package org.jivesoftware.smackx.iot.control.element;
 
-import org.jivesoftware.smack.packet.AbstractIqBuilder;
 import org.jivesoftware.smack.packet.IQ;
-import org.jivesoftware.smack.packet.IqData;
 
 public class IoTSetResponse extends IQ {
 
     public static final String ELEMENT = "setResponse";
     public static final String NAMESPACE = Constants.IOT_CONTROL_NAMESPACE;
 
-    public IoTSetResponse(IqData iqBuilder) {
-        super(iqBuilder, ELEMENT, NAMESPACE);
-    }
-
-    // TODO: Deprecate when stanza build is ready.
     public IoTSetResponse() {
         super(ELEMENT, NAMESPACE);
     }
 
     public IoTSetResponse(IoTSetRequest iotSetRequest) {
-        this(AbstractIqBuilder.createResponse(iotSetRequest));
+        this();
+        initializeAsResultFor(iotSetRequest);
     }
 
     @Override

smack-experimental/src/main/java/org/jivesoftware/smackx/iot/data/IoTDataManager.java

@@ -125,14 +125,10 @@ public final class IoTDataManager extends IoTManager {
                     @Override
                     public void momentaryReadOut(List<? extends IoTDataField> results) {
                         IoTFieldsExtension iotFieldsExtension = IoTFieldsExtension.buildFor(dataRequest.getSequenceNr(), true, thing.getNodeInfo(), results);
-
-                        XMPPConnection connection = connection();
-                        Message message = connection.getStanzaFactory().buildMessageStanza()
-                                .to(dataRequest.getFrom())
-                                .addExtension(iotFieldsExtension)
-                                .build();
+                        Message message = new Message(dataRequest.getFrom());
+                        message.addExtension(iotFieldsExtension);
                         try {
-                            connection.sendStanza(message);
+                            connection().sendStanza(message);
                         }
                         catch (NotConnectedException | InterruptedException e) {
                             LOGGER.log(Level.SEVERE, "Could not send read-out response " + message, e);

smack-experimental/src/main/java/org/jivesoftware/smackx/iot/data/element/NodeElement.java

@@ -20,7 +20,6 @@ import java.util.Collections;
 import java.util.List;
 
 import org.jivesoftware.smack.util.XmlStringBuilder;
-
 import org.jivesoftware.smackx.iot.element.NodeInfo;
 
 public class NodeElement extends IoTDataExtensionElement {

smack-experimental/src/main/java/org/jivesoftware/smackx/iot/provisioning/IoTProvisioningManager.java

@@ -140,10 +140,8 @@ public final class IoTProvisioningManager extends Manager {
                                     + " is already not subscribed to our presence.");
                     return;
                 }
-                Presence unsubscribed = connection.getStanzaFactory().buildPresenceStanza()
-                        .ofType(Presence.Type.unsubscribed)
-                        .to(unfriendJid)
-                        .build();
+                Presence unsubscribed = new Presence(Presence.Type.unsubscribed);
+                unsubscribed.setTo(unfriendJid);
                 connection.sendStanza(unsubscribed);
             }
         }, UNFRIEND_MESSAGE);
@@ -164,10 +162,7 @@ public final class IoTProvisioningManager extends Manager {
                     // friendship requests.
                     final XMPPConnection connection = connection();
                     Friend friendNotification = new Friend(connection.getUser().asBareJid());
-                    Message notificationMessage = connection.getStanzaFactory().buildMessageStanza()
-                            .to(friendJid)
-                            .addExtension(friendNotification)
-                            .build();
+                    Message notificationMessage = new Message(friendJid, friendNotification);
                     connection.sendStanza(notificationMessage);
                 } else {
                     // Check is the message was send from a thing we previously
@@ -364,11 +359,8 @@ public final class IoTProvisioningManager extends Manager {
     }
 
     public void sendFriendshipRequest(BareJid bareJid) throws NotConnectedException, InterruptedException {
-        XMPPConnection connection = connection();
-        Presence presence = connection.getStanzaFactory().buildPresenceStanza()
-            .ofType(Presence.Type.subscribe)
-            .to(bareJid)
-            .build();
+        Presence presence = new Presence(Presence.Type.subscribe);
+        presence.setTo(bareJid);
 
         friendshipRequestedCache.put(bareJid, null);
 
@@ -387,12 +379,9 @@ public final class IoTProvisioningManager extends Manager {
 
     public void unfriend(Jid friend) throws NotConnectedException, InterruptedException {
         if (isMyFriend(friend)) {
-            XMPPConnection connection = connection();
-            Presence presence = connection.getStanzaFactory().buildPresenceStanza()
-                    .ofType(Presence.Type.unsubscribed)
-                    .to(friend)
-                    .build();
-            connection.sendStanza(presence);
+            Presence presence = new Presence(Presence.Type.unsubscribed);
+            presence.setTo(friend);
+            connection().sendStanza(presence);
         }
     }
 

smack-experimental/src/main/java/org/jivesoftware/smackx/jid_prep/provider/JidPrepIqProvider.java

@@ -23,7 +23,6 @@ import org.jivesoftware.smack.parsing.SmackParsingException;
 import org.jivesoftware.smack.provider.IQProvider;
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
-
 import org.jivesoftware.smackx.jid_prep.element.JidPrepIq;
 
 public class JidPrepIqProvider extends IQProvider<JidPrepIq> {

smack-experimental/src/main/java/org/jivesoftware/smackx/muclight/MultiUserChatLight.java

@@ -35,7 +35,6 @@ import org.jivesoftware.smack.filter.MessageTypeFilter;
 import org.jivesoftware.smack.filter.StanzaFilter;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
 import org.jivesoftware.smack.packet.Stanza;
 
 import org.jivesoftware.smackx.muclight.element.MUCLightAffiliationsIQ;
@@ -127,9 +126,9 @@ public class MultiUserChatLight {
      * @throws InterruptedException if the calling thread was interrupted.
      */
     public void sendMessage(String text) throws NotConnectedException, InterruptedException {
-        MessageBuilder message = buildMessage();
+        Message message = createMessage();
         message.setBody(text);
-        connection.sendStanza(message.build());
+        connection.sendStanza(message);
     }
 
     /**
@@ -158,28 +157,9 @@ public class MultiUserChatLight {
      * Creates a new Message to send to the chat room.
      *
      * @return a new Message addressed to the chat room.
-     * @deprecated use {@link #buildMessage()} instead.
      */
-    @Deprecated
-    // TODO: Remove when stanza builder is ready.
     public Message createMessage() {
-        return connection.getStanzaFactory().buildMessageStanza()
-                .ofType(Message.Type.groupchat)
-                .to(room)
-                .build();
-    }
-
-    /**
-     * Constructs a new message builder for messages send to this MUC room.
-     *
-     * @return a new message builder.
-     */
-    public MessageBuilder buildMessage() {
-        return connection.getStanzaFactory()
-                .buildMessageStanza()
-                .ofType(Message.Type.groupchat)
-                .to(room)
-                ;
+        return new Message(room, Message.Type.groupchat);
     }
 
     /**
@@ -189,23 +169,10 @@ public class MultiUserChatLight {
      *            the message.
      * @throws NotConnectedException if the XMPP connection is not connected.
      * @throws InterruptedException if the calling thread was interrupted.
-     * @deprecated use {@link #sendMessage(MessageBuilder)} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public void sendMessage(Message message) throws NotConnectedException, InterruptedException {
-        sendMessage(message.asBuilder());
-    }
-
-    /**
-     * Sends a Message to the chat room.
-     *
-     * @param messageBuilder the message.
-     * @throws NotConnectedException if the XMPP connection is not connected.
-     * @throws InterruptedException if the calling thread was interrupted.
-     */
-    public void sendMessage(MessageBuilder messageBuilder) throws NotConnectedException, InterruptedException {
-        Message message = messageBuilder.to(room).ofType(Message.Type.groupchat).build();
+        message.setTo(room);
+        message.setType(Message.Type.groupchat);
         connection.sendStanza(message);
     }
 

smack-experimental/src/main/java/org/jivesoftware/smackx/push_notifications/provider/RemoteDisablingProvider.java

@@ -50,9 +50,7 @@ public class RemoteDisablingProvider extends ExtensionElementProvider<RemoteDisa
 
                     String affiliation = parser.getAttributeValue("", "affiliation");
                     if (affiliation == null || !affiliation.equals("none")) {
-                        // TODO: Is this correct? We previously returned null here, but was certainly wrong, as
-                        // providers should always return an element or throw.
-                        throw new IOException("Invalid affiliation: " + affiliation);
+                        return null;
                     }
                 }
             } else if (eventType == XmlPullParser.Event.END_ELEMENT) {

smack-experimental/src/main/java/org/jivesoftware/smackx/sid/StableUniqueStanzaIdManager.java

@@ -21,6 +21,7 @@ import java.util.WeakHashMap;
 
 import org.jivesoftware.smack.ConnectionCreationListener;
 import org.jivesoftware.smack.Manager;
+import org.jivesoftware.smack.StanzaListener;
 import org.jivesoftware.smack.XMPPConnection;
 import org.jivesoftware.smack.XMPPConnectionRegistry;
 import org.jivesoftware.smack.filter.AndFilter;
@@ -30,9 +31,7 @@ import org.jivesoftware.smack.filter.StanzaExtensionFilter;
 import org.jivesoftware.smack.filter.StanzaFilter;
 import org.jivesoftware.smack.filter.ToTypeFilter;
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
-import org.jivesoftware.smack.util.Consumer;
-import org.jivesoftware.smack.util.Predicate;
+import org.jivesoftware.smack.packet.Stanza;
 
 import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
 import org.jivesoftware.smackx.sid.element.OriginIdElement;
@@ -63,12 +62,12 @@ public final class StableUniqueStanzaIdManager extends Manager {
     private static final StanzaFilter ORIGIN_ID_FILTER = new StanzaExtensionFilter(OriginIdElement.ELEMENT, NAMESPACE);
 
     // Listener for outgoing stanzas that adds origin-ids to outgoing stanzas.
-    private static final Consumer<MessageBuilder> ADD_ORIGIN_ID_INTERCEPTOR = mb -> OriginIdElement.addOriginId(mb);
-
-    // We need a filter for outgoing messages that do not carry an origin-id already.
-    private static final StanzaFilter ADD_ORIGIN_ID_FILTER = new AndFilter(OUTGOING_FILTER, new NotFilter(ORIGIN_ID_FILTER));
-    private static final Predicate<Message> ADD_ORIGIN_ID_PREDICATE = m -> {
-        return ADD_ORIGIN_ID_FILTER.accept(m);
+    private static final StanzaListener ADD_ORIGIN_ID_INTERCEPTOR = new StanzaListener() {
+        @Override
+        public void processStanza(Stanza stanza) {
+            Message message = (Message) stanza;
+            OriginIdElement.addOriginId(message);
+        }
     };
 
     static {
@@ -113,8 +112,10 @@ public final class StableUniqueStanzaIdManager extends Manager {
      * Start appending origin-id elements to outgoing stanzas and add the feature to disco.
      */
     public synchronized void enable() {
-        connection().addMessageInterceptor(ADD_ORIGIN_ID_INTERCEPTOR, ADD_ORIGIN_ID_PREDICATE);
         ServiceDiscoveryManager.getInstanceFor(connection()).addFeature(NAMESPACE);
+        // We need a filter for outgoing messages that do not carry an origin-id already
+        StanzaFilter filter = new AndFilter(OUTGOING_FILTER, new NotFilter(ORIGIN_ID_FILTER));
+        connection().addStanzaInterceptor(ADD_ORIGIN_ID_INTERCEPTOR, filter);
     }
 
     /**
@@ -122,7 +123,7 @@ public final class StableUniqueStanzaIdManager extends Manager {
      */
     public synchronized void disable() {
         ServiceDiscoveryManager.getInstanceFor(connection()).removeFeature(NAMESPACE);
-        connection().removeMessageInterceptor(ADD_ORIGIN_ID_INTERCEPTOR);
+        connection().removeStanzaInterceptor(ADD_ORIGIN_ID_INTERCEPTOR);
     }
 
     /**

smack-experimental/src/main/java/org/jivesoftware/smackx/sid/element/OriginIdElement.java

@@ -17,7 +17,6 @@
 package org.jivesoftware.smackx.sid.element;
 
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
 import org.jivesoftware.smack.util.XmlStringBuilder;
 
 import org.jivesoftware.smackx.sid.StableUniqueStanzaIdManager;
@@ -39,10 +38,7 @@ public class OriginIdElement extends StableAndUniqueIdElement {
      *
      * @param message message.
      * @return the added origin-id element.
-     * @deprecated use {@link #addOriginId(MessageBuilder)} instead.
      */
-    @Deprecated
-    // TODO: Remove in Smack 4.5.
     public static OriginIdElement addOriginId(Message message) {
         OriginIdElement originId = new OriginIdElement();
         message.addExtension(originId);
@@ -51,20 +47,6 @@ public class OriginIdElement extends StableAndUniqueIdElement {
         return originId;
     }
 
-    /**
-     * Add an origin-id element to a message and set the stanzas id to the same id as in the origin-id element.
-     *
-     * @param messageBuilder the message builder to add an origin ID to.
-     * @return the added origin-id element.
-     */
-    public static OriginIdElement addOriginId(MessageBuilder messageBuilder) {
-        OriginIdElement originId = new OriginIdElement();
-        messageBuilder.addExtension(originId);
-        // TODO: Find solution to have both the originIds stanzaId and a nice to look at incremental stanzaID.
-        // message.setStanzaId(originId.getId());
-        return originId;
-    }
-
     /**
      * Return true, if the message contains a origin-id element.
      *

smack-experimental/src/main/java/org/jivesoftware/smackx/xmlelement/element/DataFormsXmlElement.java

@@ -21,7 +21,6 @@ import javax.xml.namespace.QName;
 import org.jivesoftware.smack.packet.StandardExtensionElement;
 import org.jivesoftware.smack.packet.XmlEnvironment;
 import org.jivesoftware.smack.util.XmlStringBuilder;
-
 import org.jivesoftware.smackx.xdata.FormField;
 import org.jivesoftware.smackx.xdata.FormFieldChildElement;
 

smack-experimental/src/main/java/org/jivesoftware/smackx/xmlelement/provider/DataFormsXmlElementProvider.java

@@ -26,7 +26,6 @@ import org.jivesoftware.smack.parsing.SmackParsingException;
 import org.jivesoftware.smack.parsing.StandardExtensionElementProvider;
 import org.jivesoftware.smack.xml.XmlPullParser;
 import org.jivesoftware.smack.xml.XmlPullParserException;
-
 import org.jivesoftware.smackx.xdata.provider.FormFieldChildElementProvider;
 import org.jivesoftware.smackx.xmlelement.element.DataFormsXmlElement;
 

smack-experimental/src/test/java/org/jivesoftware/smackx/chat_markers/AcknowledgedExtensionTest.java

@@ -19,7 +19,6 @@ package org.jivesoftware.smackx.chat_markers;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 import org.jivesoftware.smack.packet.StreamOpen;
 import org.jivesoftware.smack.util.PacketParserUtils;
 import org.jivesoftware.smack.xml.XmlPullParser;
@@ -29,6 +28,7 @@ import org.jivesoftware.smackx.chat_markers.element.ChatMarkersElements.Acknowle
 import org.jivesoftware.smackx.chat_markers.provider.AcknowledgedProvider;
 
 import org.junit.jupiter.api.Test;
+import org.jxmpp.jid.impl.JidCreate;
 
 public class AcknowledgedExtensionTest {
 
@@ -39,10 +39,9 @@ public class AcknowledgedExtensionTest {
 
     @Test
     public void checkDisplayedExtension() throws Exception {
-        Message message = StanzaBuilder.buildMessage("message-2")
-                .to("northumberland@shakespeare.lit/westminster")
-                .addExtension(new ChatMarkersElements.AcknowledgedExtension("message-1"))
-                .build();
+        Message message = new Message(JidCreate.from("northumberland@shakespeare.lit/westminster"));
+        message.setStanzaId("message-2");
+        message.addExtension(new ChatMarkersElements.AcknowledgedExtension("message-1"));
         assertEquals(acknowledgedMessageStanza, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 

smack-experimental/src/test/java/org/jivesoftware/smackx/chat_markers/DisplayedExtensionTest.java

@@ -19,7 +19,6 @@ package org.jivesoftware.smackx.chat_markers;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 import org.jivesoftware.smack.packet.StreamOpen;
 import org.jivesoftware.smack.util.PacketParserUtils;
 import org.jivesoftware.smack.xml.XmlPullParser;
@@ -29,6 +28,7 @@ import org.jivesoftware.smackx.chat_markers.element.ChatMarkersElements.Displaye
 import org.jivesoftware.smackx.chat_markers.provider.DisplayedProvider;
 
 import org.junit.jupiter.api.Test;
+import org.jxmpp.jid.impl.JidCreate;
 
 public class DisplayedExtensionTest {
 
@@ -39,10 +39,9 @@ public class DisplayedExtensionTest {
 
     @Test
     public void checkDisplayedExtension() throws Exception {
-        Message message = StanzaBuilder.buildMessage("message-2")
-                .to("northumberland@shakespeare.lit/westminster")
-                .addExtension(new ChatMarkersElements.DisplayedExtension("message-1"))
-                .build();
+        Message message = new Message(JidCreate.from("northumberland@shakespeare.lit/westminster"));
+        message.setStanzaId("message-2");
+        message.addExtension(new ChatMarkersElements.DisplayedExtension("message-1"));
         assertEquals(displayedMessageStanza, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 

smack-experimental/src/test/java/org/jivesoftware/smackx/chat_markers/MarkableExtensionTest.java

@@ -19,7 +19,6 @@ package org.jivesoftware.smackx.chat_markers;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 import org.jivesoftware.smack.util.PacketParserUtils;
 import org.jivesoftware.smack.xml.XmlPullParser;
 
@@ -40,12 +39,10 @@ public class MarkableExtensionTest {
 
     @Test
     public void checkMarkableExtension() throws Exception {
-        Message message = StanzaBuilder.buildMessage("message-1")
-                .to(JidCreate.from("ingrichard@royalty.england.lit/throne"))
-                .setBody("My lord, dispatch; read o'er these articles.")
-                .addExtension(ChatMarkersElements.MarkableExtension.INSTANCE)
-                .build();
-
+        Message message = new Message(JidCreate.from("ingrichard@royalty.england.lit/throne"));
+        message.setStanzaId("message-1");
+        message.setBody("My lord, dispatch; read o'er these articles.");
+        message.addExtension(ChatMarkersElements.MarkableExtension.INSTANCE);
         assertEquals(markableMessageStanza, message.toXML().toString());
     }
 

smack-experimental/src/test/java/org/jivesoftware/smackx/chat_markers/ReceivedExtensionTest.java

@@ -19,7 +19,6 @@ package org.jivesoftware.smackx.chat_markers;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 import org.jivesoftware.smack.packet.StreamOpen;
 import org.jivesoftware.smack.util.PacketParserUtils;
 import org.jivesoftware.smack.xml.XmlPullParser;
@@ -29,6 +28,7 @@ import org.jivesoftware.smackx.chat_markers.element.ChatMarkersElements.Received
 import org.jivesoftware.smackx.chat_markers.provider.ReceivedProvider;
 
 import org.junit.jupiter.api.Test;
+import org.jxmpp.jid.impl.JidCreate;
 
 public class ReceivedExtensionTest {
 
@@ -39,10 +39,9 @@ public class ReceivedExtensionTest {
 
     @Test
     public void checkReceivedExtension() throws Exception {
-        Message message = StanzaBuilder.buildMessage("message-2")
-                .to("northumberland@shakespeare.lit/westminster")
-                .addExtension(new ChatMarkersElements.ReceivedExtension("message-1"))
-                .build();
+        Message message = new Message(JidCreate.from("northumberland@shakespeare.lit/westminster"));
+        message.setStanzaId("message-2");
+        message.addExtension(new ChatMarkersElements.ReceivedExtension("message-1"));
         assertEquals(receivedMessageStanza, message.toXML(StreamOpen.CLIENT_NAMESPACE).toString());
     }
 

smack-experimental/src/test/java/org/jivesoftware/smackx/colors/ConsistentColorsTest.java

@@ -19,7 +19,6 @@ package org.jivesoftware.smackx.colors;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import org.jivesoftware.smack.test.util.SmackTestSuite;
-
 import org.jivesoftware.smackx.colors.ConsistentColor.Deficiency;
 
 import org.junit.jupiter.api.Test;

smack-experimental/src/test/java/org/jivesoftware/smackx/eme/ExplicitMessageEncryptionElementTest.java

@@ -25,8 +25,6 @@ import java.util.List;
 
 import org.jivesoftware.smack.packet.ExtensionElement;
 import org.jivesoftware.smack.packet.Message;
-import org.jivesoftware.smack.packet.MessageBuilder;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 import org.jivesoftware.smack.test.util.SmackTestSuite;
 
 import org.jivesoftware.smackx.eme.element.ExplicitMessageEncryptionElement;
@@ -37,7 +35,7 @@ public class ExplicitMessageEncryptionElementTest extends SmackTestSuite {
 
     @Test
     public void addToMessageTest() {
-        Message message = StanzaBuilder.buildMessage().build();
+        Message message = new Message();
 
         // Check inital state (no elements)
         assertNull(ExplicitMessageEncryptionElement.from(message));
@@ -47,12 +45,9 @@ public class ExplicitMessageEncryptionElementTest extends SmackTestSuite {
         List<ExtensionElement> extensions = message.getExtensions();
         assertEquals(0, extensions.size());
 
-        MessageBuilder messageBuilder = StanzaBuilder.buildMessage();
         // Add OMEMO
-        ExplicitMessageEncryptionElement.set(messageBuilder,
+        ExplicitMessageEncryptionElement.set(message,
                 ExplicitMessageEncryptionElement.ExplicitMessageEncryptionProtocol.omemoVAxolotl);
-
-        message = messageBuilder.build();
         extensions = message.getExtensions();
         assertEquals(1, extensions.size());
         assertTrue(ExplicitMessageEncryptionElement.hasProtocol(message,
@@ -64,10 +59,8 @@ public class ExplicitMessageEncryptionElementTest extends SmackTestSuite {
         assertFalse(ExplicitMessageEncryptionElement.hasProtocol(message,
                 ExplicitMessageEncryptionElement.ExplicitMessageEncryptionProtocol.openpgpV0.getNamespace()));
 
-        ExplicitMessageEncryptionElement.set(messageBuilder,
+        ExplicitMessageEncryptionElement.set(message,
                 ExplicitMessageEncryptionElement.ExplicitMessageEncryptionProtocol.openpgpV0);
-
-        message = messageBuilder.build();
         extensions = message.getExtensions();
         assertEquals(2, extensions.size());
         assertTrue(ExplicitMessageEncryptionElement.hasProtocol(message,
@@ -76,10 +69,9 @@ public class ExplicitMessageEncryptionElementTest extends SmackTestSuite {
                 ExplicitMessageEncryptionElement.ExplicitMessageEncryptionProtocol.omemoVAxolotl));
 
         // Check, if adding additional OMEMO wont add another element
-        ExplicitMessageEncryptionElement.set(messageBuilder,
+        ExplicitMessageEncryptionElement.set(message,
                 ExplicitMessageEncryptionElement.ExplicitMessageEncryptionProtocol.omemoVAxolotl);
 
-        message = messageBuilder.build();
         extensions = message.getExtensions();
         assertEquals(2, extensions.size());
     }

smack-experimental/src/test/java/org/jivesoftware/smackx/mam/QueryArchiveTest.java

@@ -25,7 +25,6 @@ import java.util.TimeZone;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Message;
 import org.jivesoftware.smack.packet.Message.Type;
-import org.jivesoftware.smack.packet.StanzaBuilder;
 import org.jivesoftware.smack.packet.StreamOpen;
 
 import org.jivesoftware.smackx.delay.packet.DelayInformation;
@@ -63,21 +62,21 @@ public class QueryArchiveTest extends MamTest {
 
     @Test
     public void checkMamQueryResults() throws Exception {
-        Message message = StanzaBuilder.buildMessage("iasd207")
-                .from("coven@chat.shakespeare.lit")
-                .to("hag66@shakespeare.lit/pda")
-                .build();
+        Message message = new Message();
+        message.setStanzaId("iasd207");
+        message.setFrom(JidCreate.from("coven@chat.shakespeare.lit"));
+        message.setTo(JidCreate.from("hag66@shakespeare.lit/pda"));
 
         GregorianCalendar calendar = new GregorianCalendar(2002, 10 - 1, 13, 23, 58, 37);
         calendar.setTimeZone(TimeZone.getTimeZone("UTC"));
         Date date = calendar.getTime();
 
         DelayInformation delay = new DelayInformation(date);
-        Message forwardedMessage = StanzaBuilder.buildMessage("162BEBB1-F6DB-4D9A-9BD8-CFDCC801A0B2")
-                        .from(JidCreate.from("coven@chat.shakespeare.lit/firstwitch"))
-                        .ofType(Type.chat)
-                        .setBody("Thrice the brinded cat hath mew.")
-                        .build();
+        Message forwardedMessage = new Message();
+        forwardedMessage.setFrom(JidCreate.from("coven@chat.shakespeare.lit/firstwitch"));
+        forwardedMessage.setStanzaId("162BEBB1-F6DB-4D9A-9BD8-CFDCC801A0B2");
+        forwardedMessage.setType(Type.chat);
+        forwardedMessage.setBody("Thrice the brinded cat hath mew.");
 
         Forwarded forwarded = new Forwarded(delay, forwardedMessage);