Merge branch '4.2' into master-paul-merged

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

@@ -341,7 +341,7 @@ public abstract class ConnectionConfiguration {
      * An enumeration for TLS security modes that are available when making a connection
      * to the XMPP server.
      */
-    public static enum SecurityMode {
+    public enum SecurityMode {
 
         /**
          * Security via TLS encryption is required in order to connect. If the server
@@ -492,7 +492,7 @@ public abstract class ConnectionConfiguration {
      * <p>
      * This is an abstract class that uses the builder design pattern and the "getThis() trick" to recover the type of
      * the builder in a class hierarchies with a self-referential generic supertype. Otherwise chaining of build
-     * instructions from the superclasses followed by build instructions of a sublcass would not be possible, because
+     * instructions from the superclasses followed by build instructions of a subclass would not be possible, because
      * the superclass build instructions would return the builder of the superclass and not the one of the subclass. You
      * can read more about it a Angelika Langer's Generics FAQ, especially the entry <a
      * href="http://www.angelikalanger.com/GenericsFAQ/FAQSections/ProgrammingIdioms.html#FAQ206">What is the
@@ -649,7 +649,7 @@ public abstract class ConnectionConfiguration {
         public B setPort(int port) {
             if (port < 0 || port > 65535) {
                 throw new IllegalArgumentException(
-                        "Port must be a 16-bit unsiged integer (i.e. between 0-65535. Port was: " + port);
+                        "Port must be a 16-bit unsigned integer (i.e. between 0-65535. Port was: " + port);
             }
             this.port = port;
             return getThis();
@@ -938,7 +938,7 @@ public abstract class ConnectionConfiguration {
             Set<String> blacklistedMechanisms = SASLAuthentication.getBlacklistedSASLMechanisms();
             for (String mechanism : saslMechanisms) {
                 if (!SASLAuthentication.isSaslMechanismRegistered(mechanism)) {
-                    throw new IllegalArgumentException("SASL " + mechanism + " is not avaiable. Consider registering it with Smack");
+                    throw new IllegalArgumentException("SASL " + mechanism + " is not available. Consider registering it with Smack");
                 }
                 if (blacklistedMechanisms.contains(mechanism)) {
                     throw new IllegalArgumentException("SALS " + mechanism + " is blacklisted.");

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

@@ -33,6 +33,6 @@ public interface ConnectionCreationListener {
      * 
      * @param connection the newly created connection.
      */
-    public void connectionCreated(XMPPConnection connection);
+    void connectionCreated(XMPPConnection connection);
 
 }

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

@@ -37,7 +37,7 @@ public interface ConnectionListener {
      *
      * @param connection the XMPPConnection which successfully connected to its endpoint.
      */
-    public void connected(XMPPConnection connection);
+    void connected(XMPPConnection connection);
 
     /**
      * Notification that the connection has been authenticated.
@@ -45,12 +45,12 @@ public interface ConnectionListener {
      * @param connection the XMPPConnection which successfully authenticated.
      * @param resumed true if a previous XMPP session's stream was resumed.
      */
-    public void authenticated(XMPPConnection connection, boolean resumed);
+    void authenticated(XMPPConnection connection, boolean resumed);
 
     /**
      * Notification that the connection was closed normally.
      */
-    public void connectionClosed();
+    void connectionClosed();
 
     /**
      * Notification that the connection was closed due to an exception. When
@@ -59,7 +59,7 @@ public interface ConnectionListener {
      *
      * @param e the exception.
      */
-    public void connectionClosedOnError(Exception e);
+    void connectionClosedOnError(Exception e);
 
     /**
      * The connection has reconnected successfully to the server. Connections will
@@ -68,7 +68,7 @@ public interface ConnectionListener {
      */
     // TODO: Remove in Smack 4.3
     @Deprecated
-    public void reconnectionSuccessful();
+    void reconnectionSuccessful();
 
     // The next two methods *must* only be invoked by ReconnectionManager
 
@@ -83,7 +83,7 @@ public interface ConnectionListener {
      */
     // TODO: Remove in Smack 4.3
     @Deprecated
-    public void reconnectingIn(int seconds);
+    void reconnectingIn(int seconds);
 
     /**
      * An attempt to connect to the server has failed. The connection will keep trying reconnecting to the server in a
@@ -97,5 +97,5 @@ public interface ConnectionListener {
      */
     // TODO: Remove in Smack 4.3
     @Deprecated
-    public void reconnectionFailed(Exception e);
+    void reconnectionFailed(Exception e);
 }

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

@@ -24,6 +24,6 @@ package org.jivesoftware.smack;
 @Deprecated
 public interface ExceptionCallback {
 
-    public void processException(Exception exception);
+    void processException(Exception exception);
 
 }

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

@@ -28,7 +28,7 @@ public abstract class Manager {
     public Manager(XMPPConnection connection) {
         Objects.requireNonNull(connection, "XMPPConnection must not be null");
 
-        weakConnection = new WeakReference<XMPPConnection>(connection);
+        weakConnection = new WeakReference<>(connection);
     }
 
     protected final XMPPConnection connection() {

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

@@ -34,7 +34,7 @@ public interface ReconnectionListener {
      *
      * @param seconds remaining seconds before attempting a reconnection.
      */
-    public void reconnectingIn(int seconds);
+    void reconnectingIn(int seconds);
 
     /**
      * An attempt to connect to the server has failed. The connection will keep trying reconnecting to the server in a
@@ -46,5 +46,5 @@ public interface ReconnectionListener {
      *
      * @param e the exception that caused the reconnection to fail.
      */
-    public void reconnectionFailed(Exception e);
+    void reconnectionFailed(Exception e);
 }

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

@@ -189,7 +189,7 @@ public final class ReconnectionManager {
     private Thread reconnectionThread;
 
     private ReconnectionManager(AbstractXMPPConnection connection) {
-        weakRefConnection = new WeakReference<AbstractXMPPConnection>(connection);
+        weakRefConnection = new WeakReference<>(connection);
 
         reconnectionRunnable = new Runnable() {
 

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

@@ -64,9 +64,9 @@ public final class SASLAuthentication {
 
     private static final Logger LOGGER = Logger.getLogger(SASLAuthentication.class.getName());
 
-    private static final List<SASLMechanism> REGISTERED_MECHANISMS = new ArrayList<SASLMechanism>();
+    private static final List<SASLMechanism> REGISTERED_MECHANISMS = new ArrayList<>();
 
-    private static final Set<String> BLACKLISTED_MECHANISMS = new HashSet<String>();
+    private static final Set<String> BLACKLISTED_MECHANISMS = new HashSet<>();
 
     static {
         // Blacklist SCRAM-SHA-1-PLUS for now.
@@ -91,7 +91,7 @@ public final class SASLAuthentication {
      * @return the registered SASLMechanism sorted by the level of preference.
      */
     public static Map<String, String> getRegisterdSASLMechanisms() {
-        Map<String, String> answer = new LinkedHashMap<String, String>();
+        Map<String, String> answer = new LinkedHashMap<>();
         synchronized (REGISTERED_MECHANISMS) {
             for (SASLMechanism mechanism : REGISTERED_MECHANISMS) {
                 answer.put(mechanism.getClass().getName(), mechanism.toString());
@@ -132,9 +132,9 @@ public final class SASLAuthentication {
         return false;
     }
 
-    public static boolean blacklistSASLMechanism(String mechansim) {
+    public static boolean blacklistSASLMechanism(String mechanism) {
         synchronized (BLACKLISTED_MECHANISMS) {
-            return BLACKLISTED_MECHANISMS.add(mechansim);
+            return BLACKLISTED_MECHANISMS.add(mechanism);
         }
     }
 
@@ -356,8 +356,8 @@ public final class SASLAuthentication {
             throw new SmackException(
                             "No supported and enabled SASL Mechanism provided by server. " +
                             "Server announced mechanisms: " + serverMechanisms + ". " +
-                            "Registerd SASL mechanisms with Smack: " + REGISTERED_MECHANISMS + ". " +
-                            "Enabled SASL mechansisms for this connection: " + configuration.getEnabledSaslMechanisms() + ". " +
+                            "Registered SASL mechanisms with Smack: " + REGISTERED_MECHANISMS + ". " +
+                            "Enabled SASL mechanisms for this connection: " + configuration.getEnabledSaslMechanisms() + ". " +
                             "Blacklisted SASL mechanisms: " + BLACKLISTED_MECHANISMS + '.'
                             );
             // @formatter;on

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

@@ -52,17 +52,17 @@ public final class SmackConfiguration {
     private static int defaultPacketReplyTimeout = 5000;
     private static int packetCollectorSize = 5000;
 
-    private static List<String> defaultMechs = new ArrayList<String>();
+    private static List<String> defaultMechs = new ArrayList<>();
 
-    static Set<String> disabledSmackClasses = new HashSet<String>();
+    static Set<String> disabledSmackClasses = new HashSet<>();
 
-    final static List<XMPPInputOutputStream> compressionHandlers = new ArrayList<XMPPInputOutputStream>(2);
+    final static List<XMPPInputOutputStream> compressionHandlers = new ArrayList<>(2);
 
     static boolean smackInitialized = false;
 
     /**
      * Value that indicates whether debugging is enabled. When enabled, a debug
-     * window will apear for each new connection that will contain the following
+     * window will appear for each new connection that will contain the following
      * information:<ul>
      * <li> Client Traffic -- raw XML traffic generated by Smack and sent to the server.
      * <li> Server Traffic -- raw XML traffic sent by the server to the client.
@@ -248,8 +248,8 @@ public final class SmackConfiguration {
         compressionHandlers.add(xmppInputOutputStream);
     }
 
-    public static List<XMPPInputOutputStream> getCompresionHandlers() {
-        List<XMPPInputOutputStream> res = new ArrayList<XMPPInputOutputStream>(compressionHandlers.size());
+    public static List<XMPPInputOutputStream> getCompressionHandlers() {
+        List<XMPPInputOutputStream> res = new ArrayList<>(compressionHandlers.size());
         for (XMPPInputOutputStream ios : compressionHandlers) {
             if (ios.isSupported()) {
                 res.add(ios);
@@ -261,7 +261,7 @@ public final class SmackConfiguration {
     /**
      * Set the default HostnameVerifier that will be used by XMPP connections to verify the hostname
      * of a TLS certificate. XMPP connections are able to overwrite this settings by supplying a
-     * HostnameVerifier in their ConnecitonConfiguration with
+     * HostnameVerifier in their ConnectionConfiguration with
      * {@link ConnectionConfiguration.Builder#setHostnameVerifier(HostnameVerifier)}.
      */
     public static void setDefaultHostnameVerifier(HostnameVerifier verifier) {

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

@@ -258,7 +258,7 @@ public class SmackException extends Exception {
 
         public ConnectionException(Throwable wrappedThrowable) {
             super(wrappedThrowable);
-            failedAddresses = new ArrayList<HostAddress>(0);
+            failedAddresses = new ArrayList<>(0);
         }
 
         private ConnectionException(String message, List<HostAddress> failedAddresses) {

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

@@ -40,7 +40,6 @@ import org.jivesoftware.smack.util.FileUtils;
 import org.jivesoftware.smack.util.StringUtils;
 
 import org.xmlpull.v1.XmlPullParser;
-import org.xmlpull.v1.XmlPullParserException;
 import org.xmlpull.v1.XmlPullParserFactory;
 
 
@@ -71,7 +70,7 @@ public final class SmackInitialization {
             }
         } catch (Exception e) {
             LOGGER.log(Level.SEVERE, "Could not determine Smack version", e);
-            smackVersion = "unkown";
+            smackVersion = "unknown";
         }
         SMACK_VERSION = smackVersion;
 
@@ -182,7 +181,7 @@ public final class SmackInitialization {
 
     private static void parseClassesToLoad(XmlPullParser parser, boolean optional,
                     Collection<Exception> exceptions, ClassLoader classLoader)
-                    throws XmlPullParserException, IOException, Exception {
+                    throws Exception {
         final String startName = parser.getName();
         int eventType;
         String name;

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

@@ -288,7 +288,7 @@ public class StanzaCollector {
         }
     }
 
-    private final void throwIfCancelled() {
+    private void throwIfCancelled() {
         if (cancelled) {
             throw new IllegalStateException("Packet collector already cancelled");
         }

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

@@ -52,6 +52,6 @@ public interface StanzaListener {
      * @throws InterruptedException 
      * @throws NotLoggedInException 
      */
-    public void processStanza(Stanza packet) throws NotConnectedException, InterruptedException, NotLoggedInException;
+    void processStanza(Stanza packet) throws NotConnectedException, InterruptedException, NotLoggedInException;
 
 }

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

@@ -27,7 +27,7 @@ public class XMPPConnectionRegistry {
      * A set of listeners which will be invoked if a new connection is created.
      */
     private final static Set<ConnectionCreationListener> connectionEstablishedListeners =
-            new CopyOnWriteArraySet<ConnectionCreationListener>();
+            new CopyOnWriteArraySet<>();
 
     /**
      * Adds a new listener that will be notified when new Connections are created. Note

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

@@ -30,10 +30,7 @@ public final class EmptyToMatcher implements StanzaFilter {
     @Override
     public boolean accept(Stanza packet) {
         Jid packetTo = packet.getTo();
-        if (packetTo == null) {
-            return true;
-        }
-        return false;
+        return packetTo == null;
     }
 
     @Override

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

@@ -54,5 +54,5 @@ public interface StanzaFilter {
      * @param stanza the stanza(/packet) to test.
      * @return true if and only if <tt>stanza</tt> passes the filter.
      */
-    public boolean accept(Stanza stanza);
+    boolean accept(Stanza stanza);
 }

smack-core/src/main/java/org/jivesoftware/smack/initializer/SmackInitializer.java

@@ -30,5 +30,5 @@ import org.jivesoftware.smack.SmackConfiguration;
  *
  */
 public interface SmackInitializer {
-    public List<Exception> initialize();
+    List<Exception> initialize();
 }

smack-core/src/main/java/org/jivesoftware/smack/iqrequest/IQRequestHandler.java

@@ -26,7 +26,7 @@ import org.jivesoftware.smack.packet.IQ;
  */
 public interface IQRequestHandler {
 
-    public enum Mode {
+    enum Mode {
         /**
          * Process requests synchronously, i.e. in the order they arrive. Uses a single thread, which means that the other
          * requests have to wait until all previous synchronous requests have been handled. Use {@link #async} if
@@ -41,13 +41,13 @@ public interface IQRequestHandler {
         async,
     }
 
-    public IQ handleIQRequest(IQ iqRequest);
+    IQ handleIQRequest(IQ iqRequest);
 
-    public Mode getMode();
+    Mode getMode();
 
-    public IQ.Type getType();
+    IQ.Type getType();
 
-    public String getElement();
+    String getElement();
 
-    public String getNamespace();
+    String getNamespace();
 }

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

@@ -28,5 +28,5 @@ public interface Element {
      *
      * @return the stanza(/packet) extension as XML.
      */
-    public CharSequence toXML();
+    CharSequence toXML();
 }

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

@@ -25,7 +25,7 @@ public class EmptyResultIQ extends IQ {
 
     public EmptyResultIQ(IQ request) {
         this();
-        initialzeAsResultFor(request);
+        initializeAsResultFor(request);
     }
 
     @Override

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

@@ -40,6 +40,6 @@ public interface ExtensionElement extends NamedElement {
      *
      * @return the namespace.
      */
-    public String getNamespace();
+    String getNamespace();
 
 }

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

@@ -215,7 +215,7 @@ public abstract class IQ extends Stanza {
      */
     protected abstract IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml);
 
-    protected final void initialzeAsResultFor(IQ request) {
+    protected final void initializeAsResultFor(IQ 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());

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

@@ -28,6 +28,6 @@ public interface NamedElement extends Element {
      *
      * @return the element name.
      */
-    public String getElementName();
+    String getElementName();
 
 }

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

@@ -28,15 +28,15 @@ import java.util.Set;
 @Deprecated
 public interface Packet extends TopLevelStreamElement {
 
-    public static final String TEXT = "text";
-    public static final String ITEM = "item";
+    String TEXT = "text";
+    String ITEM = "item";
 
     /**
      * 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();
+    String getStanzaId();
 
     /**
      * Get the stanza id.
@@ -44,7 +44,7 @@ public interface Packet extends TopLevelStreamElement {
      * @deprecated use {@link #getStanzaId()} instead.
      */
     @Deprecated
-    public String getPacketID();
+    String getPacketID();
 
     /**
      * Sets the unique ID of the packet. To indicate that a stanza(/packet) has no id
@@ -52,7 +52,7 @@ public interface Packet extends TopLevelStreamElement {
      *
      * @param id the unique ID for the packet.
      */
-    public void setStanzaId(String id);
+    void setStanzaId(String id);
 
     /**
      * Set the stanza ID.
@@ -60,7 +60,7 @@ public interface Packet extends TopLevelStreamElement {
      * @deprecated use {@link #setStanzaId(String)} instead.
      */
     @Deprecated
-    public void setPacketID(String packetID);
+    void setPacketID(String packetID);
 
     /**
      * Returns who the stanza(/packet) is being sent "to", or <tt>null</tt> if
@@ -70,7 +70,7 @@ public interface Packet extends TopLevelStreamElement {
      * @return who the stanza(/packet) is being sent to, or <tt>null</tt> if the
      *      value has not been set.
      */
-    public String getTo();
+    String getTo();
 
     /**
      * Sets who the stanza(/packet) is being sent "to". The XMPP protocol often makes
@@ -78,7 +78,7 @@ public interface Packet extends TopLevelStreamElement {
      *
      * @param to who the stanza(/packet) is being sent to.
      */
-    public void setTo(String to);
+    void setTo(String to);
 
     /**
      * Returns who the stanza(/packet) is being sent "from" or <tt>null</tt> if
@@ -88,7 +88,7 @@ public interface Packet extends TopLevelStreamElement {
      * @return who the stanza(/packet) is being sent from, or <tt>null</tt> if the
      *      value has not been set.
      */
-    public String getFrom();
+    String getFrom();
 
     /**
      * Sets who the stanza(/packet) is being sent "from". The XMPP protocol often
@@ -97,7 +97,7 @@ public interface Packet extends TopLevelStreamElement {
      *
      * @param from who the stanza(/packet) is being sent to.
      */
-    public void setFrom(String from);
+    void setFrom(String from);
 
     /**
      * Returns the error associated with this packet, or <tt>null</tt> if there are
@@ -105,34 +105,34 @@ public interface Packet extends TopLevelStreamElement {
      *
      * @return the error sub-packet or <tt>null</tt> if there isn't an error.
      */
-    public XMPPError getError();
+    XMPPError getError();
     /**
      * Sets the error for this packet.
      *
      * @param error the error to associate with this packet.
      */
-    public void setError(XMPPError error);
+    void setError(XMPPError error);
 
     /**
      * Returns the xml:lang of this Stanza, or null if one has not been set.
      *
      * @return the xml:lang of this Stanza, or null.
      */
-    public String getLanguage();
+    String getLanguage();
 
     /**
      * Sets the xml:lang of this Stanza.
      *
      * @param language the xml:lang of this Stanza.
      */
-    public void setLanguage(String language);
+    void setLanguage(String language);
 
     /**
      * Returns a copy of the stanza(/packet) extensions attached to the packet.
      *
      * @return the stanza(/packet) extensions.
      */
-    public List<ExtensionElement> getExtensions();
+    List<ExtensionElement> getExtensions();
 
     /**
      * Return a set of all extensions with the given element name <emph>and</emph> namespace.
@@ -145,7 +145,7 @@ public interface Packet extends TopLevelStreamElement {
      * @return a set of all matching extensions.
      * @since 4.1
      */
-    public Set<ExtensionElement> getExtensions(String elementName, String namespace);
+    Set<ExtensionElement> getExtensions(String elementName, String namespace);
 
     /**
      * Returns the first extension of this stanza(/packet) that has the given namespace.
@@ -156,7 +156,7 @@ public interface Packet extends TopLevelStreamElement {
      * @param namespace the namespace of the extension that is desired.
      * @return the stanza(/packet) extension with the given namespace.
      */
-    public ExtensionElement getExtension(String namespace);
+    ExtensionElement getExtension(String namespace);
 
     /**
      * Returns the first stanza(/packet) extension that matches the specified element name and
@@ -173,20 +173,20 @@ public interface Packet extends TopLevelStreamElement {
      * @param namespace the XML element namespace of the stanza(/packet) extension.
      * @return the extension, or <tt>null</tt> if it doesn't exist.
      */
-    public <PE extends ExtensionElement> PE getExtension(String elementName, String namespace);
+    <PE extends ExtensionElement> PE getExtension(String elementName, String namespace);
     /**
      * Adds a stanza(/packet) extension to the packet. Does nothing if extension is null.
      *
      * @param extension a stanza(/packet) extension.
      */
-    public void addExtension(ExtensionElement extension);
+    void addExtension(ExtensionElement extension);
 
     /**
      * Adds a collection of stanza(/packet) extensions to the packet. Does nothing if extensions is null.
      * 
      * @param extensions a collection of stanza(/packet) extensions
      */
-    public void addExtensions(Collection<ExtensionElement> extensions);
+    void addExtensions(Collection<ExtensionElement> extensions);
 
     /**
      * Check if a stanza(/packet) extension with the given element and namespace exists.
@@ -198,7 +198,7 @@ public interface Packet extends TopLevelStreamElement {
      * @param namespace
      * @return true if a stanza(/packet) extension exists, false otherwise.
      */
-    public boolean hasExtension(String elementName, String namespace);
+    boolean hasExtension(String elementName, String namespace);
 
     /**
      * Check if a stanza(/packet) extension with the given namespace exists.
@@ -206,7 +206,7 @@ public interface Packet extends TopLevelStreamElement {
      * @param namespace
      * @return true if a stanza(/packet) extension exists, false otherwise.
      */
-    public boolean hasExtension(String namespace);
+    boolean hasExtension(String namespace);
 
     /**
      * Remove the stanza(/packet) extension with the given elementName and namespace.
@@ -215,7 +215,7 @@ public interface Packet extends TopLevelStreamElement {
      * @param namespace
      * @return the removed stanza(/packet) extension or null.
      */
-    public ExtensionElement removeExtension(String elementName, String namespace);
+    ExtensionElement removeExtension(String elementName, String namespace);
 
     /**
      * Removes a stanza(/packet) extension from the packet.
@@ -223,10 +223,10 @@ public interface Packet extends TopLevelStreamElement {
      * @param extension the stanza(/packet) extension to remove.
      * @return the removed stanza(/packet) extension or null.
      */
-    public ExtensionElement removeExtension(ExtensionElement extension);
+    ExtensionElement removeExtension(ExtensionElement extension);
 
     @Override
     // NOTE When Smack is using Java 8, then this method should be moved in Element as "Default Method".
-    public String toString();
+    String toString();
 
 }

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

@@ -25,7 +25,7 @@ import org.jivesoftware.smack.util.XmlStringBuilder;
 
 /**
  * Represents a stream error packet. Stream errors are unrecoverable errors where the server
- * will close the unrelying TCP connection after the stream error was sent to the client.
+ * will close the underlying TCP connection after the stream error was sent to the client.
  * These is the list of stream errors as defined in the XMPP spec:<p>
  *
  * <table border=1>
@@ -174,7 +174,7 @@ public class StreamError extends AbstractError implements Nonza {
         restricted_xml,
         see_other_host,
         system_shutdown,
-        undeficed_condition,
+        undefined_condition,
         unsupported_encoding,
         unsupported_feature,
         unsupported_stanza_type,

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

@@ -39,6 +39,6 @@ public interface ParsingExceptionCallback {
      * @param stanzaData the raw stanza data that caused the exception
      * @throws Exception
      */
-    public void handleUnparsableStanza(UnparseableStanza stanzaData) throws Exception;
+    void handleUnparsableStanza(UnparseableStanza stanzaData) throws Exception;
 
 }

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

@@ -45,7 +45,7 @@ import org.jxmpp.util.XmppStringUtils;
  *      <li>jabber:iq:register</ul>
  *
  * Because many more IQ types are part of XMPP and its extensions, a pluggable IQ parsing
- * mechanism is provided. IQ providers are registered programatically or by creating a
+ * mechanism is provided. IQ providers are registered programmatically or by creating a
  * providers file. The file is an XML
  * document that contains one or more iqProvider entries, as in the following example:
  *
@@ -100,7 +100,7 @@ import org.jxmpp.util.XmppStringUtils;
  * is found in a packet, parsing will be passed to the correct provider. Each provider
  * can either implement the PacketExtensionProvider interface or be a standard Java Bean. In
  * the former case, each extension provider is responsible for parsing the raw XML stream to
- * contruct an object. In the latter case, bean introspection is used to try to automatically
+ * construct an object. In the latter case, bean introspection is used to try to automatically
  * set the properties of th class using the values in the stanza(/packet) extension sub-element. When an
  * extension provider is not registered for an element name and namespace combination, Smack will
  * store all top-level elements of the sub-packet in DefaultPacketExtension object and then
@@ -207,7 +207,7 @@ public final class ProviderManager {
 
     /**
      * Removes an IQ provider with the specified element name and namespace. This
-     * method is typically called to cleanup providers that are programatically added
+     * method is typically called to cleanup providers that are programmatically added
      * using the {@link #addIQProvider(String, String, Object) addIQProvider} method.
      *
      * @param elementName the XML element name.
@@ -237,7 +237,7 @@ public final class ProviderManager {
      *
      * @param elementName element name associated with extension provider.
      * @param namespace namespace associated with extension provider.
-     * @return the extenion provider.
+     * @return the extension provider.
      */
     public static ExtensionElementProvider<ExtensionElement> getExtensionProvider(String elementName, String namespace) {
         String key = getKey(elementName, namespace);
@@ -269,7 +269,7 @@ public final class ProviderManager {
 
     /**
      * Removes an extension provider with the specified element name and namespace. This
-     * method is typically called to cleanup providers that are programatically added
+     * method is typically called to cleanup providers that are programmatically added
      * using the {@link #addExtensionProvider(String, String, Object) addExtensionProvider} method.
      *
      * @param elementName the XML element name.

smack-core/src/main/java/org/jivesoftware/smack/proxy/HTTPProxySocketConnection.java

@@ -78,7 +78,7 @@ class HTTPProxySocketConnection implements ProxySocketConnection {
             got.append(c);
             if (got.length() > 1024)
             {
-                throw new ProxyException(ProxyInfo.ProxyType.HTTP, "Recieved " +
+                throw new ProxyException(ProxyInfo.ProxyType.HTTP, "Received " +
                     "header of >1024 characters from "
                     + proxyhost + ", cancelling connection");
             }

smack-core/src/main/java/org/jivesoftware/smack/proxy/ProxyInfo.java

@@ -25,7 +25,7 @@ package org.jivesoftware.smack.proxy;
 
 public class ProxyInfo
 {
-    public static enum ProxyType
+    public enum ProxyType
     {
         HTTP,
         SOCKS4,

smack-core/src/main/java/org/jivesoftware/smack/proxy/ProxySocketConnection.java

@@ -21,7 +21,7 @@ import java.net.Socket;
 
 public interface ProxySocketConnection {
 
-    public void connect(Socket socket, String host, int port, int timeout)
+    void connect(Socket socket, String host, int port, int timeout)
                     throws IOException;
 
 }

smack-core/src/main/java/org/jivesoftware/smack/proxy/Socks4ProxySocketConnection.java

@@ -117,7 +117,7 @@ public class Socks4ProxySocketConnection implements ProxySocketConnection {
 
     90: request granted
     91: request rejected or failed
-    92: request rejected becasue SOCKS server cannot connect to
+    92: request rejected because SOCKS server cannot connect to
     identd on the client
     93: request rejected because the client program and identd
     report different user-ids

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

@@ -246,7 +246,7 @@ public abstract class ScramMechanism extends SASLMechanism {
             return gs2Header;
         }
 
-        return ByteUtils.concact(gs2Header, cbindData);
+        return ByteUtils.concat(gs2Header, cbindData);
     }
 
     protected String getChannelBindingName() {
@@ -394,7 +394,7 @@ public abstract class ScramMechanism extends SASLMechanism {
             throw new AssertionError();
         }
         // U1 := HMAC(str, salt + INT(1))
-        byte[] u = hmac(key, ByteUtils.concact(salt, ONE));
+        byte[] u = hmac(key, ByteUtils.concat(salt, ONE));
         byte[] res = u.clone();
         for (int i = 1; i < iterations; i++) {
             u = hmac(key, u);

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

@@ -73,7 +73,7 @@ public class Async {
                 if (e instanceof RuntimeException) {
                     throw (RuntimeException) e;
                 }
-                LOGGER.log(Level.WARNING, "Catched Exception", e);
+                LOGGER.log(Level.WARNING, "Caught Exception", e);
             }
         }
 

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

@@ -17,7 +17,7 @@
 package org.jivesoftware.smack.util;
 
 public class ByteUtils {
-    public static byte[] concact(byte[] arrayOne, byte[] arrayTwo) {
+    public static byte[] concat(byte[] arrayOne, byte[] arrayTwo) {
         int combinedLength = arrayOne.length + arrayTwo.length;
         byte[] res = new byte[combinedLength];
         System.arraycopy(arrayOne, 0, res, 0, arrayOne.length);

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

@@ -29,7 +29,9 @@ public class IpAddressUtil {
             return false;
         }
 
-        for (int i = 0; i < 3; i++) {
+        assert matcher.groupCount() == 4;
+
+        for (int i = 1; i <= 4; i++) {
             String ipSegment = matcher.group(i);
             int ipSegmentInt;
             try {

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

@@ -35,7 +35,7 @@ public class LazyStringBuilder implements Appendable, CharSequence {
     }
 
     public LazyStringBuilder() {
-        list = new ArrayList<CharSequence>(20);
+        list = new ArrayList<>(20);
     }
 
     public LazyStringBuilder append(LazyStringBuilder lsb) {

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

@@ -90,19 +90,17 @@ public class ObservableWriter extends Writer {
 
     /**
      * Notify that a new string has been written.
-     * 
-     * @param str the written String to notify 
      */
     private void notifyListeners() {
-        WriterListener[] writerListeners = null;
+        WriterListener[] writerListeners;
         synchronized (listeners) {
             writerListeners = new WriterListener[listeners.size()];
             listeners.toArray(writerListeners);
         }
         String str = stringBuilder.toString();
         stringBuilder.setLength(0);
-        for (int i = 0; i < writerListeners.length; i++) {
-            writerListeners[i].write(str);
+        for (WriterListener writerListener : writerListeners) {
+            writerListener.write(str);
         }
     }
 

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

@@ -229,7 +229,7 @@ public class PacketParserUtils {
         String language = getLanguageAttribute(parser);
 
         // determine message's default language
-        String defaultLanguage = null;
+        String defaultLanguage;
         if (language != null && !"".equals(language.trim())) {
             message.setLanguage(language);
             defaultLanguage = language;
@@ -746,7 +746,7 @@ public class PacketParserUtils {
     public static Map<String, String> parseDescriptiveTexts(XmlPullParser parser, Map<String, String> descriptiveTexts)
                     throws XmlPullParserException, IOException {
         if (descriptiveTexts == null) {
-            descriptiveTexts = new HashMap<String, String>();
+            descriptiveTexts = new HashMap<>();
         }
         String xmllang = getLanguageAttribute(parser);
         if (xmllang == null) {
@@ -805,7 +805,7 @@ public class PacketParserUtils {
      */
     public static StreamError parseStreamError(XmlPullParser parser) throws Exception {
         final int initialDepth = parser.getDepth();
-        List<ExtensionElement> extensions = new ArrayList<ExtensionElement>();
+        List<ExtensionElement> extensions = new ArrayList<>();
         Map<String, String> descriptiveTexts = null;
         StreamError.Condition condition = null;
         String conditionText = null;
@@ -857,7 +857,7 @@ public class PacketParserUtils {
                     throws Exception {
         final int initialDepth = parser.getDepth();
         Map<String, String> descriptiveTexts = null;
-        List<ExtensionElement> extensions = new ArrayList<ExtensionElement>();
+        List<ExtensionElement> extensions = new ArrayList<>();
         XMPPError.Builder builder = XMPPError.getBuilder();
 
         // Parse the error header

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

@@ -32,7 +32,7 @@ public class PacketUtil {
      * @deprecated use {@link #extensionElementFrom(Collection, String, String)} instead
      */
     @Deprecated
-    public static <PE extends ExtensionElement> PE packetExtensionfromCollection(
+    public static <PE extends ExtensionElement> PE packetExtensionFromCollection(
                     Collection<ExtensionElement> collection, String element,
                     String namespace) {
         return extensionElementFrom(collection, element, namespace);

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

@@ -138,11 +138,7 @@ public class ParserUtils {
         if (valueString == null)
             return null;
         valueString = valueString.toLowerCase(Locale.US);
-        if (valueString.equals("true") || valueString.equals("0")) {
-            return true;
-        } else {
-            return false;
-        }
+        return valueString.equals("true") || valueString.equals("0");
     }
 
     public static boolean getBooleanAttribute(XmlPullParser parser, String name,
@@ -232,8 +228,7 @@ public class ParserUtils {
 
     public static URI getUriFromNextText(XmlPullParser parser) throws XmlPullParserException, IOException, URISyntaxException  {
         String uriString = parser.nextText();
-        URI uri = new URI(uriString);
-        return uri;
+        return new URI(uriString);
     }
 
     public static String getRequiredAttribute(XmlPullParser parser, String name) throws IOException {
@@ -253,7 +248,6 @@ public class ParserUtils {
     }
 
     public static String getXmlLang(XmlPullParser parser) {
-        String langString = parser.getAttributeValue("http://www.w3.org/XML/1998/namespace", "lang");
-        return langString;
+        return parser.getAttributeValue("http://www.w3.org/XML/1998/namespace", "lang");
     }
 }

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

@@ -33,6 +33,6 @@ public interface ReaderListener {
      * 
      * @param str the read String
      */
-    public abstract void read(String str);
+    void read(String str);
 
 }

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

@@ -18,6 +18,6 @@ package org.jivesoftware.smack.util;
 
 public interface StringTransformer {
 
-    public String transform(String string);
+    String transform(String string);
 
 }

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

@@ -431,10 +431,10 @@ public class StringUtils {
     }
 
     public static boolean nullSafeCharSequenceEquals(CharSequence csOne, CharSequence csTwo) {
-        return nullSafeCharSequenceComperator(csOne, csTwo) == 0;
+        return nullSafeCharSequenceComparator(csOne, csTwo) == 0;
     }
 
-    public static int nullSafeCharSequenceComperator(CharSequence csOne, CharSequence csTwo) {
+    public static int nullSafeCharSequenceComparator(CharSequence csOne, CharSequence csTwo) {
         if (csOne == null ^ csTwo == null) {
             return (csOne == null) ? -1 : 1;
         }

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

@@ -18,6 +18,6 @@ package org.jivesoftware.smack.util;
 
 public interface SuccessCallback<T> {
 
-    public void onSuccess(T result);
+    void onSuccess(T result);
 
 }

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

@@ -55,7 +55,7 @@ public class TLSUtils {
      * According to the <a
      * href="https://raw.githubusercontent.com/stpeter/manifesto/master/manifesto.txt">Encrypted
      * XMPP Manifesto</a>, TLSv1.2 shall be deployed, providing fallback support for SSLv3 and
-     * TLSv1.1. This method goes one step boyond and upgrades the handshake to use TLSv1 or better.
+     * TLSv1.1. This method goes one step beyond and upgrades the handshake to use TLSv1 or better.
      * This method requires the underlying OS to support all of TLSv1.2 , 1.1 and 1.0.
      * </p>
      * 

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

@@ -29,6 +29,6 @@ public interface TypedCloneable<T> extends Cloneable {
      *
      * @return a cloned version of this instance.
      */
-    public T clone();
+    T clone();
 
 }

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

@@ -33,6 +33,6 @@ public interface WriterListener {
      * 
      * @param str the written string
      */
-    public abstract void write(String str);
+    void write(String str);
 
 }

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

@@ -81,7 +81,7 @@ public class XmlStringBuilder implements Appendable, CharSequence {
 
     /**
      * Add a new element to this builder, with the {@link java.util.Date} instance as its content,
-     * which will get formated with {@link XmppDateTime#formatXEP0082Date(Date)}.
+     * which will get formatted with {@link XmppDateTime#formatXEP0082Date(Date)}.
      *
      * @param name element name
      * @param content content of element
@@ -123,7 +123,7 @@ public class XmlStringBuilder implements Appendable, CharSequence {
 
     /**
      * Add a new element to this builder, with the {@link java.util.Date} instance as its content,
-     * which will get formated with {@link XmppDateTime#formatXEP0082Date(Date)}
+     * which will get formatted with {@link XmppDateTime#formatXEP0082Date(Date)}
      * if {@link java.util.Date} instance is not <code>null</code>.
      *
      * @param name element name
@@ -245,7 +245,7 @@ public class XmlStringBuilder implements Appendable, CharSequence {
 
     /**
      * Add a new attribute to this builder, with the {@link java.util.Date} instance as its value,
-     * which will get formated with {@link XmppDateTime#formatXEP0082Date(Date)}.
+     * which will get formatted with {@link XmppDateTime#formatXEP0082Date(Date)}.
      *
      * @param name name of attribute
      * @param value value of attribute
@@ -280,7 +280,7 @@ public class XmlStringBuilder implements Appendable, CharSequence {
 
     /**
      * Add a new attribute to this builder, with the {@link java.util.Date} instance as its value,
-     * which will get formated with {@link XmppDateTime#formatXEP0082Date(Date)}
+     * which will get formatted with {@link XmppDateTime#formatXEP0082Date(Date)}
      * if {@link java.util.Date} instance is not <code>null</code>.
      *
      * @param name attribute name

smack-core/src/main/java/org/jivesoftware/smack/util/dns/DNSResolver.java

@@ -20,6 +20,7 @@ import java.net.InetAddress;
 import java.net.UnknownHostException;
 import java.util.Arrays;
 import java.util.List;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import org.jivesoftware.smack.ConnectionConfiguration.DnssecMode;
@@ -91,6 +92,22 @@ public abstract class DNSResolver {
         return Arrays.asList(inetAddressArray);
     }
 
+    protected final boolean shouldContinue(CharSequence name, CharSequence hostname, List<InetAddress> hostAddresses) {
+        if (hostAddresses == null) {
+            return true;
+        }
+
+        // If hostAddresses is not null but empty, then the DNS resolution was successful but the domain did not
+        // have any A or AAAA resource records.
+        if (hostAddresses.isEmpty()) {
+            LOGGER.log(Level.INFO, "The DNS name " + name + ", points to a hostname (" + hostname
+                            + ") which has neither A or AAAA resource records. This is an indication of a broken DNS setup.");
+            return true;
+        }
+
+        return false;
+    }
+
     private final void checkIfDnssecRequestedAndSupported(DnssecMode dnssecMode) {
         if (dnssecMode != DnssecMode.disabled && !supportsDnssec) {
             throw new UnsupportedOperationException("This resolver does not support DNSSEC");

smack-core/src/main/java/org/jivesoftware/smack/util/dns/HostAddress.java

@@ -43,7 +43,7 @@ public class HostAddress {
     public HostAddress(String fqdn, int port, List<InetAddress> inetAddresses) {
         if (port < 0 || port > 65535)
             throw new IllegalArgumentException(
-                    "Port must be a 16-bit unsiged integer (i.e. between 0-65535. Port was: " + port);
+                    "Port must be a 16-bit unsigned integer (i.e. between 0-65535. Port was: " + port);
         if (StringUtils.isNotEmpty(fqdn) && fqdn.charAt(fqdn.length() - 1) == '.') {
             this.fqdn = fqdn.substring(0, fqdn.length() - 1);
         }

smack-core/src/main/java/org/jivesoftware/smack/util/dns/SRVRecord.java

@@ -48,12 +48,12 @@ public class SRVRecord extends HostAddress implements Comparable<SRVRecord> {
         StringUtils.requireNotNullOrEmpty(fqdn, "The FQDN must not be null");
         if (weight < 0 || weight > 65535)
             throw new IllegalArgumentException(
-                    "DNS SRV records weight must be a 16-bit unsiged integer (i.e. between 0-65535. Weight was: "
+                    "DNS SRV records weight must be a 16-bit unsigned integer (i.e. between 0-65535. Weight was: "
                             + weight);
 
         if (priority < 0 || priority > 65535)
             throw new IllegalArgumentException(
-                    "DNS SRV records priority must be a 16-bit unsiged integer (i.e. between 0-65535. Priority was: "
+                    "DNS SRV records priority must be a 16-bit unsigned integer (i.e. between 0-65535. Priority was: "
                             + priority);
 
         this.priority = priority;

smack-core/src/test/java/org/jivesoftware/smack/StanzaCollectorTest.java

@@ -105,7 +105,7 @@ public class StanzaCollectorTest
             @Override
             public void run()
             {
-                Stanza p = null;
+                Stanza p;
 
                 do
                 {
@@ -134,7 +134,7 @@ public class StanzaCollectorTest
             @Override
             public void run()
             {
-                Stanza p = null;
+                Stanza p;
 
                 do
                 {

smack-core/src/test/java/org/jivesoftware/smack/ThreadedDummyConnection.java

@@ -37,8 +37,8 @@ import org.jivesoftware.smack.packet.Stanza;
 public class ThreadedDummyConnection extends DummyConnection {
     private static final Logger LOGGER = Logger.getLogger(ThreadedDummyConnection.class.getName());
 
-    private BlockingQueue<IQ> replyQ = new ArrayBlockingQueue<IQ>(1);
-    private BlockingQueue<Stanza> messageQ = new LinkedBlockingQueue<Stanza>(5);
+    private final BlockingQueue<IQ> replyQ = new ArrayBlockingQueue<>(1);
+    private final BlockingQueue<Stanza> messageQ = new LinkedBlockingQueue<>(5);
     private volatile boolean timeout = false;
 
     @Override

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

@@ -142,7 +142,7 @@ public class MessageTest {
         XmlUnitUtils.assertSimilar(control, message.toXML());
 
         Collection<String> languages = message.getBodyLanguages();
-        List<String> controlLanguages = new ArrayList<String>();
+        List<String> controlLanguages = new ArrayList<>();
         controlLanguages.add(lang2);
         controlLanguages.add(lang3);
         controlLanguages.removeAll(languages);

smack-core/src/test/java/org/jivesoftware/smack/parsing/ParsingExceptionTest.java

@@ -16,7 +16,7 @@
  */
 package org.jivesoftware.smack.parsing;
 
-import static org.jivesoftware.smack.test.util.CharsequenceEquals.equalsCharSequence;
+import static org.jivesoftware.smack.test.util.CharSequenceEquals.equalsCharSequence;
 import static org.junit.Assert.assertThat;
 
 import org.jivesoftware.smack.SmackException;

smack-core/src/test/java/org/jivesoftware/smack/sasl/DigestMd5SaslTest.java

@@ -24,7 +24,6 @@ import java.util.HashMap;
 import java.util.Map;
 
 import org.jivesoftware.smack.SmackException;
-import org.jivesoftware.smack.SmackException.NotConnectedException;
 import org.jivesoftware.smack.util.StringUtils;
 
 import org.jxmpp.jid.EntityBareJid;
@@ -40,7 +39,7 @@ public class DigestMd5SaslTest extends AbstractSaslTest {
         super(saslMechanism);
     }
 
-    protected void runTest(boolean useAuthzid) throws NotConnectedException, SmackException, InterruptedException, XmppStringprepException, UnsupportedEncodingException {
+    protected void runTest(boolean useAuthzid) throws SmackException, InterruptedException, XmppStringprepException, UnsupportedEncodingException {
         EntityBareJid authzid = null;
         if (useAuthzid) {
             authzid = JidCreate.entityBareFrom("shazbat@xmpp.org");

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

@@ -0,0 +1,47 @@
+/**
+ *
+ * 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.
+ * 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.test.util;
+
+import org.hamcrest.Description;
+import org.hamcrest.Factory;
+import org.hamcrest.Matcher;
+import org.hamcrest.TypeSafeMatcher;
+
+public class CharSequenceEquals extends TypeSafeMatcher<CharSequence> {
+
+    private final String charSequenceString;
+
+    public CharSequenceEquals(CharSequence charSequence) {
+        charSequenceString = charSequence.toString();
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText("Does not match CharSequence ").appendValue(charSequenceString);
+    }
+
+    @Override
+    protected boolean matchesSafely(CharSequence item) {
+        String itemString = item.toString();
+        return charSequenceString.equals(itemString);
+    }
+
+    @Factory
+    public static Matcher<CharSequence> equalsCharSequence(CharSequence charSequence) {
+        return new CharSequenceEquals(charSequence);
+    }
+}

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

@@ -0,0 +1,46 @@
+/**
+ *
+ * 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.
+ * 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 static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+public class IpAddressUtilTest {
+
+    @Test
+    public void isIpV4AddressTest() {
+        String ipv4 = "122.20.221.11";
+        boolean isIpV4 = IpAddressUtil.isIPv4LiteralAddress(ipv4);
+        assertTrue(isIpV4);
+    }
+
+    @Test
+    public void isInvalidIpV4AddressTest() {
+        String ipv4 = "122.20.221.11.1";
+        boolean isIpV4 = IpAddressUtil.isIPv4LiteralAddress(ipv4);
+        assertFalse(isIpV4);
+    }
+
+    @Test
+    public void isInvalidIpV4AddressTest2() {
+        String ipv4 = "122.20.256.11";
+        boolean isIpV4 = IpAddressUtil.isIPv4LiteralAddress(ipv4);
+        assertFalse(isIpV4);
+    }
+}

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

@@ -809,7 +809,7 @@ public class PacketParserUtilsTest {
                     IOException, TransformerException, SAXException {
         // @formatter:off
         final String stanza = XMLBuilder.create("outer", "outerNamespace").a("outerAttribute", "outerValue")
-                        .element("inner", "innerNamespace").a("innverAttribute", "innerValue")
+                        .element("inner", "innerNamespace").a("innerAttribute", "innerValue")
                             .element("innermost")
                                 .t("some text")
                         .asString();

smack-debug/src/main/java/org/jivesoftware/smackx/debugger/EnhancedDebuggerWindow.java

@@ -240,7 +240,7 @@ public final class EnhancedDebuggerWindow {
         JPanel iqProvidersPanel = new JPanel();
         iqProvidersPanel.setLayout(new GridLayout(1, 1));
         iqProvidersPanel.setBorder(BorderFactory.createTitledBorder("Installed IQ Providers"));
-        Vector<String> providers = new Vector<String>();
+        Vector<String> providers = new Vector<>();
         for (Object provider : ProviderManager.getIQProviders()) {
             if (provider.getClass() == Class.class) {
                 providers.add(((Class<?>) provider).getName());
@@ -259,7 +259,7 @@ public final class EnhancedDebuggerWindow {
         JPanel extensionProvidersPanel = new JPanel();
         extensionProvidersPanel.setLayout(new GridLayout(1, 1));
         extensionProvidersPanel.setBorder(BorderFactory.createTitledBorder("Installed Extension Providers"));
-        providers = new Vector<String>();
+        providers = new Vector<>();
         for (Object provider : ProviderManager.getExtensionProviders()) {
             if (provider.getClass() == Class.class) {
                 providers.add(((Class<?>) provider).getName());
@@ -305,7 +305,7 @@ public final class EnhancedDebuggerWindow {
         menuItem.addActionListener(new ActionListener() {
             @Override
             public void actionPerformed(ActionEvent e) {
-                ArrayList<EnhancedDebugger> debuggersToRemove = new ArrayList<EnhancedDebugger>();
+                ArrayList<EnhancedDebugger> debuggersToRemove = new ArrayList<>();
                 // Remove all the debuggers of which their connections are no longer valid
                 for (int index = 0; index < tabbedPane.getComponentCount() - 1; index++) {
                     EnhancedDebugger debugger = debuggers.get(index);

smack-experimental/src/main/java/org/jivesoftware/smackx/carbons/packet/CarbonExtension.java

@@ -123,7 +123,7 @@ public class CarbonExtension implements ExtensionElement {
     /**
      * Defines the direction of a {@link CarbonExtension} message.
      */
-    public static enum Direction {
+    public enum Direction {
         received,
         sent
     }

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

@@ -48,7 +48,7 @@ public class ExplicitMessageEncryptionElement implements ExtensionElement {
         private final String namespace;
         private final String name;
 
-        private ExplicitMessageEncryptionProtocol(String namespace, String name) {
+        ExplicitMessageEncryptionProtocol(String namespace, String name) {
             this.namespace = namespace;
             this.name = name;
             PROTOCOL_LUT.put(namespace, this);

smack-experimental/src/main/java/org/jivesoftware/smackx/hoxt/packet/AbstractHttpOverXmpp.java

@@ -90,7 +90,7 @@ public abstract class AbstractHttpOverXmpp extends IQ {
     /**
      * A builder for XMPP connection configurations.
      * <p>
-     * See ConnectionConfiguration Buidler for more details.
+     * See ConnectionConfiguration Builder for more details.
      * </p>
      *
      * @param <B> the builder type parameter.

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

@@ -64,7 +64,18 @@ import org.jxmpp.jid.DomainBareJid;
  */
 public final class HttpFileUploadManager extends Manager {
 
+    /**
+     * Namespace of XEP-0363 v0.4 or higher. Constant value {@value #NAMESPACE}.
+     *
+     * @see <a href="https://xmpp.org/extensions/attic/xep-0363-0.4.0.html">XEP-0363 v0.4.0</a>
+     */
     public static final String NAMESPACE = "urn:xmpp:http:upload:0";
+
+    /**
+     * Namespace of XEP-0363 v0.2 or lower. Constant value {@value #NAMESPACE_0_2}.
+     *
+     * @see <a href="https://xmpp.org/extensions/attic/xep-0363-0.2.5.html">XEP-0363 v0.2.5</a>
+     */
     public static final String NAMESPACE_0_2 = "urn:xmpp:http:upload";
 
     private static final Logger LOGGER = Logger.getLogger(HttpFileUploadManager.class.getName());
@@ -459,6 +470,22 @@ public final class HttpFileUploadManager extends Manager {
         }
     }
 
+    public static UploadService.Version namespaceToVersion(String namespace) {
+        UploadService.Version version;
+        switch (namespace) {
+        case NAMESPACE:
+            version = Version.v0_3;
+            break;
+        case NAMESPACE_0_2:
+            version = Version.v0_2;
+            break;
+        default:
+            version = null;
+            break;
+        }
+        return version;
+    }
+
     private static boolean containsHttpFileUploadNamespace(DiscoverInfo discoverInfo) {
         return discoverInfo.containsFeature(NAMESPACE) || discoverInfo.containsFeature(NAMESPACE_0_2);
     }

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

@@ -22,8 +22,19 @@ import org.jxmpp.jid.DomainBareJid;
 
 public class UploadService {
 
-    enum Version {
+    public enum Version {
+        /**
+         * Upload service as specified in XEP-0363 v0.2 or lower.
+         *
+         * @see <a href="https://xmpp.org/extensions/attic/xep-0363-0.2.5.html">XEP-0363 v0.2.5</a>
+         */
         v0_2,
+
+        /**
+         * Upload service as specified in XEP-0363 v0.3 or higher.
+         *
+         * @see <a href="https://xmpp.org/extensions/attic/xep-0363-0.4.0.html">XEP-0363 v0.4.0</a>
+         */
         v0_3,
     }
 

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

@@ -33,8 +33,9 @@ public class Slot extends IQ {
     public static final String ELEMENT = "slot";
     public static final String NAMESPACE = SlotRequest.NAMESPACE;
 
-    private final URL putUrl;
-    private final URL getUrl;
+    protected final URL putUrl;
+    protected final URL getUrl;
+
     private final Map<String, String> headers;
 
     public Slot(URL putUrl, URL getUrl) {
@@ -73,12 +74,21 @@ public class Slot extends IQ {
     protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml) {
         xml.rightAngleBracket();
 
-        xml.element("put", putUrl.toString());
-        xml.element("get", getUrl.toString());
-        for (Map.Entry<String, String> entry : getHeaders().entrySet()) {
-            xml.openElement("header").attribute(entry.getKey(), entry.getValue());
+        xml.halfOpenElement("put").attribute("url", putUrl.toString());
+        if (headers.isEmpty()) {
+            xml.closeEmptyElement();
+        } else {
+            xml.rightAngleBracket();
+            for (Map.Entry<String, String> entry : getHeaders().entrySet()) {
+                xml.halfOpenElement("header").attribute("name", entry.getKey()).rightAngleBracket();
+                xml.escape(entry.getValue());
+                xml.closeElement("header");
+            }
+            xml.closeElement("put");
         }
 
+        xml.halfOpenElement("get").attribute("url", getUrl.toString()).closeEmptyElement();
+
         return xml;
     }
 }

smack-experimental/src/main/java/org/jivesoftware/smackx/httpfileupload/element/Slot_V0_2.java

@@ -28,4 +28,13 @@ public class Slot_V0_2 extends Slot {
         super(putUrl, getUrl, null, NAMESPACE);
     }
 
+    @Override
+    protected IQChildElementXmlStringBuilder getIQChildElementBuilder(IQChildElementXmlStringBuilder xml) {
+        xml.rightAngleBracket();
+
+        xml.element("put", putUrl.toString());
+        xml.element("get", getUrl.toString());
+
+        return xml;
+    }
 }

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

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2017 Grigory Fedorov
+ * Copyright © 2017 Grigory Fedorov, Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -25,6 +25,8 @@ import org.jivesoftware.smack.SmackException;
 import org.jivesoftware.smack.provider.IQProvider;
 import org.jivesoftware.smack.util.ParserUtils;
 
+import org.jivesoftware.smackx.httpfileupload.HttpFileUploadManager;
+import org.jivesoftware.smackx.httpfileupload.UploadService;
 import org.jivesoftware.smackx.httpfileupload.element.Slot;
 import org.jivesoftware.smackx.httpfileupload.element.Slot_V0_2;
 
@@ -42,9 +44,13 @@ public class SlotProvider extends IQProvider<Slot> {
     @Override
     public Slot parse(XmlPullParser parser, int initialDepth) throws XmlPullParserException, IOException, SmackException {
         final String namespace = parser.getNamespace();
+
+        final UploadService.Version version = HttpFileUploadManager.namespaceToVersion(namespace);
+        assert version != null;
+
         URL putUrl = null;
         URL getUrl = null;
-        Map<String, String> headers = null;
+        PutElement_V0_4_Content putElementV04Content = null;
 
         outerloop: while (true) {
             int event = parser.next();
@@ -53,19 +59,33 @@ public class SlotProvider extends IQProvider<Slot> {
                 case XmlPullParser.START_TAG:
                     String name = parser.getName();
                     switch (name) {
-                        case "put":
-                            putUrl = new URL(parser.nextText());
-                            break;
-                        case "get":
-                            getUrl = new URL(parser.nextText());
-                            break;
-                        case "header":
-                            String headerName = ParserUtils.getRequiredAttribute(parser, "name");
-                            String headerValue = ParserUtils.getRequiredNextText(parser);
-                            if (headers == null) {
-                                headers = new HashMap<>();
+                        case "put": {
+                            switch (version) {
+                            case v0_2:
+                                String putUrlString = parser.nextText();
+                                putUrl = new URL(putUrlString);
+                                break;
+                            case v0_3:
+                                putElementV04Content = parsePutElement_V0_4(parser);
+                                break;
+                            default:
+                                throw new AssertionError();
                             }
-                            headers.put(headerName, headerValue);
+                            break;
+                        }
+                        case "get":
+                            String getUrlString;
+                            switch (version) {
+                            case v0_2:
+                                getUrlString = parser.nextText();
+                                break;
+                            case v0_3:
+                                getUrlString = parser.getAttributeValue(null, "url");
+                                break;
+                            default:
+                                throw new AssertionError();
+                            }
+                            getUrl = new URL(getUrlString);
                             break;
                     }
                     break;
@@ -77,13 +97,67 @@ public class SlotProvider extends IQProvider<Slot> {
             }
         }
 
-        switch (namespace) {
-        case Slot.NAMESPACE:
-            return new Slot(putUrl, getUrl, headers);
-        case Slot_V0_2.NAMESPACE:
+        switch (version) {
+        case v0_3:
+            return new Slot(putElementV04Content.putUrl, getUrl, putElementV04Content.headers);
+        case v0_2:
             return new Slot_V0_2(putUrl, getUrl);
         default:
             throw new AssertionError();
         }
     }
+
+    public static PutElement_V0_4_Content parsePutElement_V0_4(XmlPullParser parser) throws XmlPullParserException, IOException {
+        final int initialDepth = parser.getDepth();
+
+        String putUrlString = parser.getAttributeValue(null, "url");
+        URL putUrl = new URL(putUrlString);
+
+        Map<String, String> headers = null;
+        outerloop: while (true) {
+            int next = parser.next();
+            switch (next) {
+            case XmlPullParser.START_TAG:
+                String name = parser.getName();
+                switch (name) {
+                case "header":
+                    String headerName = ParserUtils.getRequiredAttribute(parser, "name");
+                    String headerValue = ParserUtils.getRequiredNextText(parser);
+                    if (headers == null) {
+                        headers = new HashMap<>();
+                    }
+                    headers.put(headerName, headerValue);
+                    break;
+                default:
+                    break;
+                }
+                break;
+            case XmlPullParser.END_TAG:
+                if (parser.getDepth() == initialDepth) {
+                    break outerloop;
+                }
+                break;
+            }
+        }
+
+        return new PutElement_V0_4_Content(putUrl, headers);
+    }
+
+    public static final class PutElement_V0_4_Content {
+        private final URL putUrl;
+        private final Map<String, String> headers;
+
+        private PutElement_V0_4_Content(URL putUrl, Map<String, String> headers) {
+            this.putUrl = putUrl;
+            this.headers = headers;
+        }
+
+        public URL getPutUrl() {
+            return putUrl;
+        }
+
+        public Map<String, String> getHeaders() {
+            return headers;
+        }
+    }
 }

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

@@ -26,6 +26,6 @@ import org.jxmpp.jid.Jid;
 
 public interface ThingControlRequest {
 
-    public void processRequest(Jid from, Collection<SetData> setData) throws XMPPErrorException;
+    void processRequest(Jid from, Collection<SetData> setData) throws XMPPErrorException;
 
 }

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

@@ -29,7 +29,7 @@ public class IoTSetResponse extends IQ {
 
     public IoTSetResponse(IoTSetRequest iotSetRequest) {
         this();
-        initialzeAsResultFor(iotSetRequest);
+        initializeAsResultFor(iotSetRequest);
     }
 
     @Override

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

@@ -32,7 +32,7 @@ public abstract class SetData implements NamedElement {
 
         private final String toStringCache;
 
-        private Type() {
+        Type() {
             toStringCache = this.name().toLowerCase(Locale.US);
         }
 

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

@@ -18,6 +18,6 @@ package org.jivesoftware.smackx.iot.data;
 
 public interface ThingMomentaryReadOutRequest {
 
-    public void momentaryReadOutRequest(ThingMomentaryReadOutResult callback);
+    void momentaryReadOutRequest(ThingMomentaryReadOutResult callback);
 
 }

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

@@ -22,6 +22,6 @@ import org.jivesoftware.smackx.iot.data.element.IoTDataField;
 
 public interface ThingMomentaryReadOutResult {
 
-    public void momentaryReadOut(List<? extends IoTDataField> results);
+    void momentaryReadOut(List<? extends IoTDataField> results);
 
 }

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

@@ -24,7 +24,7 @@ public class IoTDataRequest extends IQ {
     public static final String NAMESPACE = Constants.IOT_SENSORDATA_NAMESPACE;
 
     /**
-     * The sequence nummber. According to XEP-0323 an xs:int.
+     * The sequence number. According to XEP-0323 an xs:int.
      */
     private final int seqNr;
 

smack-experimental/src/main/java/org/jivesoftware/smackx/iot/discovery/ThingStateChangeListener.java

@@ -20,6 +20,6 @@ import org.jxmpp.jid.BareJid;
 
 public interface ThingStateChangeListener {
 
-    public void owned(BareJid owner);
+    void owned(BareJid owner);
 
 }

smack-experimental/src/main/java/org/jivesoftware/smackx/iot/discovery/element/Tag.java

@@ -25,7 +25,7 @@ public class Tag implements NamedElement {
 
     public enum Type {
         str,
-        num;
+        num
     }
 
     private final String name;

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

@@ -161,8 +161,8 @@ public final class IoTProvisioningManager extends Manager {
                     // Notify the recommended friend that we will now accept his
                     // friendship requests.
                     final XMPPConnection connection = connection();
-                    Friend friendNotifiacation = new Friend(connection.getUser().asBareJid());
-                    Message notificationMessage = new Message(friendJid, friendNotifiacation);
+                    Friend friendNotification = new Friend(connection.getUser().asBareJid());
+                    Message notificationMessage = new Message(friendJid, friendNotification);
                     connection.sendStanza(notificationMessage);
                 } else {
                     // Check is the message was send from a thing we previously
@@ -236,7 +236,7 @@ public final class IoTProvisioningManager extends Manager {
                 }
                 catch (NoResponseException | XMPPErrorException | NotConnectedException | InterruptedException e) {
                     LOGGER.log(Level.WARNING,
-                                    "Could not determine privisioning server. Ignoring friend request from " + from, e);
+                                    "Could not determine provisioning server. Ignoring friend request from " + from, e);
                 }
                 if (provisioningServer == null) {
                     return null;
@@ -420,7 +420,7 @@ public final class IoTProvisioningManager extends Manager {
         if (!provisioningServer.equals(stanza.getFrom())) {
             if (log) {
                 LOGGER.warning("Ignoring  request '" + stanza
-                                + "' because not from provising server '" + provisioningServer
+                                + "' because not from provisioning server '" + provisioningServer
                                 + "'.");
             }
             return false;

smack-experimental/src/main/java/org/jivesoftware/smackx/mam/MamManager.java

@@ -239,11 +239,11 @@ public final class MamManager extends Manager {
 
 
     /**
-     * Query an message archive like a MUC archive or a pubsub node archive, addressed by an archiveAddress, applying
+     * Query an message archive like a MUC archive or a PubSub node archive, addressed by an archiveAddress, applying
      * filters: max count, start date, end date, from/to JID and with additional fields. When archiveAddress is null the
      * default, the server will be requested.
      * 
-     * @param node The Pubsub node name, can be null
+     * @param node The PubSub node name, can be null
      * @param max
      * @param start
      * @param end
@@ -346,7 +346,7 @@ public final class MamManager extends Manager {
     /**
      * Returns a page of the archive.
      * 
-     * @param node The Pubsub node name, can be null
+     * @param node The PubSub node name, can be null
      * @param dataForm
      * @param rsmSet
      * @return the MAM query result
@@ -498,7 +498,7 @@ public final class MamManager extends Manager {
     /**
      * Get the form fields supported by the server.
      * 
-     * @param node The Pubsub node name, can be null
+     * @param node The PubSub node name, can be null
      * @return the list of form fields.
      * @throws NoResponseException
      * @throws XMPPErrorException
@@ -521,7 +521,7 @@ public final class MamManager extends Manager {
     private MamQueryResult queryArchive(MamQueryIQ mamQueryIq) throws NoResponseException, XMPPErrorException,
             NotConnectedException, InterruptedException, NotLoggedInException {
         final XMPPConnection connection = getAuthenticatedConnectionOrThrow();
-        MamFinIQ mamFinIQ = null;
+        MamFinIQ mamFinIQ;
 
         StanzaCollector mamFinIQCollector = connection.createStanzaCollector(new IQReplyFilter(mamQueryIq, connection));
 

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

@@ -82,7 +82,7 @@ public class MultiUserChatLight {
      * Same as {@link #fromRoomFilter} together with
      * {@link MessageTypeFilter#GROUPCHAT}.
      */
-    private final StanzaFilter fromRoomGroupchatFilter;
+    private final StanzaFilter fromRoomGroupChatFilter;
 
     private final StanzaListener messageListener;
 
@@ -93,7 +93,7 @@ public class MultiUserChatLight {
         this.room = room;
 
         fromRoomFilter = FromMatchesFilter.create(room);
-        fromRoomGroupchatFilter = new AndFilter(fromRoomFilter, MessageTypeFilter.GROUPCHAT);
+        fromRoomGroupChatFilter = new AndFilter(fromRoomFilter, MessageTypeFilter.GROUPCHAT);
 
         messageListener = new StanzaListener() {
             @Override
@@ -105,7 +105,7 @@ public class MultiUserChatLight {
             }
         };
 
-        connection.addSyncStanzaListener(messageListener, fromRoomGroupchatFilter);
+        connection.addSyncStanzaListener(messageListener, fromRoomGroupChatFilter);
     }
 
     /**
@@ -266,7 +266,7 @@ public class MultiUserChatLight {
             throws Exception {
         MUCLightCreateIQ createMUCLightIQ = new MUCLightCreateIQ(room, roomName, occupants);
 
-        messageCollector = connection.createStanzaCollector(fromRoomGroupchatFilter);
+        messageCollector = connection.createStanzaCollector(fromRoomGroupChatFilter);
 
         try {
             connection.createStanzaCollectorAndSend(createMUCLightIQ).nextResultOrThrow();

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

@@ -96,7 +96,7 @@ public final class MultiUserChatLightManager extends Manager {
 
     private MultiUserChatLight createNewMucLightAndAddToMap(EntityBareJid jid) {
         MultiUserChatLight multiUserChatLight = new MultiUserChatLight(connection(), jid);
-        multiUserChatLights.put(jid, new WeakReference<MultiUserChatLight>(multiUserChatLight));
+        multiUserChatLights.put(jid, new WeakReference<>(multiUserChatLight));
         return multiUserChatLight;
     }
 
@@ -193,11 +193,11 @@ public final class MultiUserChatLightManager extends Manager {
      */
     public List<Jid> getRoomsBlocked(DomainBareJid mucLightService)
             throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
-        MUCLightBlockingIQ muclIghtBlockingIQResult = getBlockingList(mucLightService);
+        MUCLightBlockingIQ mucLightBlockingIQResult = getBlockingList(mucLightService);
 
         List<Jid> jids = new ArrayList<>();
-        if (muclIghtBlockingIQResult.getRooms() != null) {
-            jids.addAll(muclIghtBlockingIQResult.getRooms().keySet());
+        if (mucLightBlockingIQResult.getRooms() != null) {
+            jids.addAll(mucLightBlockingIQResult.getRooms().keySet());
         }
 
         return jids;
@@ -215,11 +215,11 @@ public final class MultiUserChatLightManager extends Manager {
      */
     public List<Jid> getUsersBlocked(DomainBareJid mucLightService)
             throws NoResponseException, XMPPErrorException, NotConnectedException, InterruptedException {
-        MUCLightBlockingIQ muclIghtBlockingIQResult = getBlockingList(mucLightService);
+        MUCLightBlockingIQ mucLightBlockingIQResult = getBlockingList(mucLightService);
 
         List<Jid> jids = new ArrayList<>();
-        if (muclIghtBlockingIQResult.getUsers() != null) {
-            jids.addAll(muclIghtBlockingIQResult.getUsers().keySet());
+        if (mucLightBlockingIQResult.getUsers() != null) {
+            jids.addAll(mucLightBlockingIQResult.getUsers().keySet());
         }
 
         return jids;
@@ -234,9 +234,9 @@ public final class MultiUserChatLightManager extends Manager {
         StanzaFilter responseFilter = new IQReplyFilter(mucLightBlockingIQ, connection());
         IQ responseIq = connection().createStanzaCollectorAndSend(responseFilter, mucLightBlockingIQ)
                 .nextResultOrThrow();
-        MUCLightBlockingIQ muclIghtBlockingIQResult = (MUCLightBlockingIQ) responseIq;
+        MUCLightBlockingIQ mucLightBlockingIQResult = (MUCLightBlockingIQ) responseIq;
 
-        return muclIghtBlockingIQResult;
+        return mucLightBlockingIQResult;
     }
 
     /**

smack-experimental/src/main/resources/org.jivesoftware.smack.experimental/experimental.providers

@@ -254,7 +254,7 @@
       <namespace>urn:xmpp:hints</namespace>
       <className>org.jivesoftware.smackx.hints.provider.StoreHintProvider</className>
     </extensionProvider>
-g
+
     <!-- XEP-0363: HTTP File Upload -->
     <iqProvider>
       <elementName>slot</elementName>

smack-experimental/src/test/java/org/jivesoftware/smackx/ExperimentalInitializerTest.java

@@ -27,7 +27,7 @@ import org.junit.Test;
 public class ExperimentalInitializerTest {
 
     @Test
-    public void testExperimentalInitialzer() {
+    public void testExperimentalInitializer() {
         ExperimentalInitializer epi = new ExperimentalInitializer();
         List<Exception> exceptions = epi.initialize();
         assertTrue(exceptions.size() == 0);

smack-experimental/src/test/java/org/jivesoftware/smackx/carbons/CarbonTest.java

@@ -16,7 +16,7 @@
  */
 package org.jivesoftware.smackx.carbons;
 
-import static org.jivesoftware.smack.test.util.CharsequenceEquals.equalsCharSequence;
+import static org.jivesoftware.smack.test.util.CharSequenceEquals.equalsCharSequence;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertThat;
 

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

@@ -49,7 +49,7 @@ public class AcknowledgedExtensionTest {
         AcknowledgedExtension acknowledgedExtension1 = new AcknowledgedProvider().parse(parser);
         Assert.assertEquals("message-1", acknowledgedExtension1.getId());
 
-        Message message = (Message) PacketParserUtils.parseStanza(acknowledgedMessageStanza);
+        Message message = PacketParserUtils.parseStanza(acknowledgedMessageStanza);
         AcknowledgedExtension acknowledgedExtension2 = AcknowledgedExtension.from(message);
         Assert.assertEquals("message-1", acknowledgedExtension2.getId());
     }

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

@@ -49,7 +49,7 @@ public class DisplayedExtensionTest {
         DisplayedExtension displayedExtension1 = new DisplayedProvider().parse(parser);
         Assert.assertEquals("message-1", displayedExtension1.getId());
 
-        Message message = (Message) PacketParserUtils.parseStanza(displayedMessageStanza);
+        Message message = PacketParserUtils.parseStanza(displayedMessageStanza);
         DisplayedExtension displayedExtension2 = DisplayedExtension.from(message);
         Assert.assertEquals("message-1", displayedExtension2.getId());
     }

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

@@ -51,7 +51,7 @@ public class MarkableExtensionTest {
         MarkableExtension markableExtension1 = new MarkableProvider().parse(parser);
         Assert.assertEquals(markableExtension, markableExtension1.toXML().toString());
 
-        Message message = (Message) PacketParserUtils.parseStanza(markableMessageStanza);
+        Message message = PacketParserUtils.parseStanza(markableMessageStanza);
         MarkableExtension markableExtension2 = MarkableExtension.from(message);
         Assert.assertEquals(markableExtension, markableExtension2.toXML().toString());
     }

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

@@ -49,7 +49,7 @@ public class ReceivedExtensionTest {
         ReceivedExtension receivedExtension1 = new ReceivedProvider().parse(parser);
         Assert.assertEquals("message-1", receivedExtension1.getId());
 
-        Message message = (Message) PacketParserUtils.parseStanza(receivedMessageStanza);
+        Message message = PacketParserUtils.parseStanza(receivedMessageStanza);
         ReceivedExtension receivedExtension2 = ReceivedExtension.from(message);
         Assert.assertEquals("message-1", receivedExtension2.getId());
     }

smack-experimental/src/test/java/org/jivesoftware/smackx/hoxt/provider/HttpOverXmppReqProviderTest.java

@@ -72,7 +72,6 @@ public class HttpOverXmppReqProviderTest {
         XmlPullParser parser = PacketParserUtils.getParserFor(string);
         IQ iq = provider.parse(parser);
         assertTrue(iq instanceof HttpOverXmppReq);
-        HttpOverXmppReq castedIq = (HttpOverXmppReq) iq;
-        return castedIq;
+        return  (HttpOverXmppReq) iq;
     }
 }

smack-experimental/src/test/java/org/jivesoftware/smackx/httpfileupload/FileTooLargeErrorCreateTest.java

@@ -22,7 +22,7 @@ import org.junit.Assert;
 import org.junit.Test;
 
 public class FileTooLargeErrorCreateTest {
-    String fileTooLargeErrorExtensionExample
+    private static final String fileTooLargeErrorExtensionExample
             = "<file-too-large xmlns='urn:xmpp:http:upload:0'>"
             +   "<max-file-size>20000</max-file-size>"
             + "</file-too-large>";

smack-experimental/src/test/java/org/jivesoftware/smackx/httpfileupload/SlotCreateTest.java

@@ -16,23 +16,26 @@
  */
 package org.jivesoftware.smackx.httpfileupload;
 
-import java.net.MalformedURLException;
+import static org.custommonkey.xmlunit.XMLAssert.assertXMLEqual;
+
+import java.io.IOException;
 import java.net.URL;
 
 import org.jivesoftware.smackx.httpfileupload.element.Slot;
 
 import org.junit.Assert;
 import org.junit.Test;
+import org.xml.sax.SAXException;
 
 public class SlotCreateTest {
-    String testSlot
+    private static final String testSlot
             = "<slot xmlns='urn:xmpp:http:upload:0'>"
-            +     "<put>https://upload.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png</put>"
-            +     "<get>https://download.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png</get>"
+            +     "<put url='https://upload.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png'></put>"
+            +     "<get url='https://download.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png'></get>"
             + "</slot>";
 
     @Test
-    public void checkSlotRequestCreation() throws MalformedURLException {
+    public void checkSlotRequestCreation() throws SAXException, IOException {
         Slot slot = new Slot(new URL("https://upload.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png"),
                 new URL("https://download.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png"));
 
@@ -41,6 +44,6 @@ public class SlotCreateTest {
         Assert.assertEquals(new URL("https://download.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png"),
                 slot.getGetUrl());
 
-        Assert.assertEquals(testSlot, slot.getChildElementXML().toString());
+        assertXMLEqual(testSlot, slot.getChildElementXML().toString());
     }
 }

smack-experimental/src/test/java/org/jivesoftware/smackx/httpfileupload/SlotRequestCreateTest.java

@@ -29,14 +29,14 @@ import org.xml.sax.SAXException;
 
 public class SlotRequestCreateTest {
 
-    String testRequest
+    private static final String testRequest
             = "<request xmlns='urn:xmpp:http:upload:0'"
             +   " filename='my_juliet.png'"
             +   " size='23456'"
             +   " content-type='image/jpeg'"
             + "/>";
 
-    String testRequestWithoutContentType
+    private static final String testRequestWithoutContentType
             = "<request xmlns='urn:xmpp:http:upload:0'"
             +   " filename='my_romeo.png'"
             +   " size='52523'"

smack-experimental/src/test/java/org/jivesoftware/smackx/httpfileupload/provider/FileTooLargeErrorProviderTest.java

@@ -30,7 +30,7 @@ public class FileTooLargeErrorProviderTest {
      * Example 7. Alternative response by the upload service if the file size was too large
      * @see <a href="http://xmpp.org/extensions/xep-0363.html#errors">XEP-0363: HTTP File Upload 5. Error conditions</a>
      */
-    String slotErrorFileToLarge
+    private static final String slotErrorFileToLarge
             = "<iq from='upload.montague.tld' "
             +       "id='step_03' "
             +       "to='romeo@montague.tld/garden' "

smack-experimental/src/test/java/org/jivesoftware/smackx/httpfileupload/provider/SlotProviderTest.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2017 Grigory Fedorov
+ * Copyright © 2017 Grigory Fedorov, Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,42 +16,108 @@
  */
 package org.jivesoftware.smackx.httpfileupload.provider;
 
+import static org.custommonkey.xmlunit.XMLAssert.assertXMLEqual;
+import static org.junit.Assert.assertEquals;
+
+import java.net.MalformedURLException;
 import java.net.URL;
 
-import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.util.PacketParserUtils;
 
 import org.jivesoftware.smackx.httpfileupload.element.Slot;
+import org.jivesoftware.smackx.httpfileupload.element.Slot_V0_2;
 
-import org.junit.Assert;
 import org.junit.Test;
 
-
 public class SlotProviderTest {
 
+    private static final String PUT_URL_STRING = "https://upload.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png";
+
+    private static final String GET_URL_STRING = "https://download.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png";
+
+    private static final URL PUT_URL = urlFromString(PUT_URL_STRING);
+    private static final URL GET_URL = urlFromString(GET_URL_STRING);
+
+    private static URL urlFromString(String urlString) {
+        try {
+            return new URL(urlString);
+        }
+        catch (MalformedURLException e) {
+            throw new Error(e);
+        }
+    }
+
     /**
      * Example 6. The upload service responds with a slot
      * @see <a href="http://xmpp.org/extensions/xep-0363.html#request">XEP-0363: HTTP File Upload 4. Requesting a slot</a>
      */
-    String slotExample
+    private static final String SLOT_IQ
             = "<iq from='upload.montague.tld' "
             +       "id='step_03' "
             +       "to='romeo@montague.tld/garden' "
             +       "type='result'>"
             +   "<slot xmlns='urn:xmpp:http:upload:0'>"
-            +       "<put>https://upload.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png</put>"
-            +       "<get>https://download.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png</get>"
+            +       "<put url='" + PUT_URL_STRING + "'></put>"
+            +       "<get url='" + GET_URL_STRING + "'></get>"
             +   "</slot>"
             + "</iq>";
 
     @Test
     public void checkSlotProvider() throws Exception {
-        Slot slot = PacketParserUtils.parseStanza(slotExample);
+        Slot slot = PacketParserUtils.parseStanza(SLOT_IQ);
 
-        Assert.assertEquals(IQ.Type.result, slot.getType());
-        Assert.assertEquals(new URL("https://upload.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png"),
-                slot.getPutUrl());
-        Assert.assertEquals(new URL("https://download.montague.tld/4a771ac1-f0b2-4a4a-9700-f2a26fa2bb67/my_juliet.png"),
-                slot.getGetUrl());
+        checkUrls(slot);
+
+        assertXMLEqual(SLOT_IQ, slot.toXML().toString());
+    }
+
+    private static final String SLOT_V0_2_IQ =
+                    "<iq from='upload.montague.tld' " +
+                        "id='step_03' " +
+                        "to='romeo@montague.tld/garden' " +
+                        "type='result'>" +
+                      "<slot xmlns='urn:xmpp:http:upload'>" +
+                        "<put>" + PUT_URL_STRING + "</put>" +
+                        "<get>" + GET_URL_STRING + "</get>" +
+                      "</slot>" +
+                    "</iq>";
+
+    @Test
+    public void checkSlotV0_2Provider() throws Exception {
+        Slot_V0_2 slot = PacketParserUtils.parseStanza(SLOT_V0_2_IQ);
+
+        checkUrls(slot);
+
+        String slotXml = slot.toXML().toString();
+        assertXMLEqual(SLOT_V0_2_IQ, slotXml);
+    }
+
+    private static final String SLOT_WITH_HEADERS_IQ =
+                    "<iq from='upload.montague.tld' " +
+                        "id='step_03' " +
+                        "to='romeo@montague.tld/garden' " +
+                        "type='result'>" +
+                      "<slot xmlns='urn:xmpp:http:upload:0'>" +
+                        "<put url='" + PUT_URL_STRING + "'>" +
+                           "<header name='Authorization'>Basic Base64String==</header>" +
+                           "<header name='Host'>montague.tld</header>" +
+                         "</put>" +
+                         "<get url='" + GET_URL_STRING + "' />" +
+                      "</slot>" +
+                    "</iq>";
+
+    @Test
+    public void checkSlotWithHeaders() throws Exception {
+        Slot slot = PacketParserUtils.parseStanza(SLOT_WITH_HEADERS_IQ);
+
+        checkUrls(slot);
+
+        String slotXml = slot.toXML().toString();
+        assertXMLEqual(SLOT_WITH_HEADERS_IQ, slotXml);
+    }
+
+    private static void checkUrls(Slot slot) {
+        assertEquals(PUT_URL, slot.getPutUrl());
+        assertEquals(GET_URL, slot.getGetUrl());
     }
 }

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

@@ -61,7 +61,7 @@ public class MamFinProviderTest extends MamTest {
                         + "</iq>";
         // @formatter:on
 
-        IQ iq = (IQ) PacketParserUtils.parseStanza(IQ_LIMITED_RESULTS_EXAMPLE);
+        IQ iq = PacketParserUtils.parseStanza(IQ_LIMITED_RESULTS_EXAMPLE);
 
         MamFinIQ mamFinIQ = (MamFinIQ) iq;
         Assert.assertEquals(mamFinIQ.getType(), Type.result);

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

@@ -31,18 +31,18 @@ import org.xmlpull.v1.XmlPullParser;
 
 public class MamPrefIQProviderTest extends MamTest {
 
-    String exampleMamPrefsIQ1 = "<iq type='set' id='juliet3'>" + "<prefs xmlns='urn:xmpp:mam:1' default='roster'>"
+    private static final String exampleMamPrefsIQ1 = "<iq type='set' id='juliet3'>" + "<prefs xmlns='urn:xmpp:mam:1' default='roster'>"
             + "<always>" + "<jid>romeo@montague.lit</jid>" + "</always>" + "<never>"
             + "<jid>montague@montague.lit</jid>" + "</never>" + "</prefs>" + "</iq>";
 
-    String exampleMamPrefsIQ2 = "<iq type='set' id='juliet3'>" + "<prefs xmlns='urn:xmpp:mam:1' default='roster'>"
+    private static final String exampleMamPrefsIQ2 = "<iq type='set' id='juliet3'>" + "<prefs xmlns='urn:xmpp:mam:1' default='roster'>"
             + "<always>" + "<jid>romeo@montague.lit</jid>" + "<jid>montague@montague.lit</jid>" + "</always>"
             + "<never>" + "</never>" + "</prefs>" + "</iq>";
 
-    String exampleMamPrefsIQ3 = "<iq type='get' id='juliet3'>" + "<prefs xmlns='urn:xmpp:mam:1'>" + "</prefs>"
+    private static final String exampleMamPrefsIQ3 = "<iq type='get' id='juliet3'>" + "<prefs xmlns='urn:xmpp:mam:1'>" + "</prefs>"
             + "</iq>";
 
-    String exampleMamPrefsResultIQ = "<iq type='result' id='juliet3'>"
+    private static final String exampleMamPrefsResultIQ = "<iq type='result' id='juliet3'>"
             + "<prefs xmlns='urn:xmpp:mam:1' default='roster'>" + "<always>" + "<jid>romeo@montague.lit</jid>"
             + "</always>" + "<never>" + "<jid>sarasa@montague.lit</jid>" + "<jid>montague@montague.lit</jid>"
             + "</never>" + "</prefs>" + "</iq>";
@@ -53,14 +53,14 @@ public class MamPrefIQProviderTest extends MamTest {
         MamPrefsIQ mamPrefIQ1 = new MamPrefsIQProvider().parse(parser1);
 
         Assert.assertEquals(IQ.Type.set, mamPrefIQ1.getType());
-        Assert.assertEquals(mamPrefIQ1.getAlwaysJids().get(0), "romeo@montague.lit");
-        Assert.assertEquals(mamPrefIQ1.getNeverJids().get(0), "montague@montague.lit");
+        Assert.assertEquals(mamPrefIQ1.getAlwaysJids().get(0).toString(), "romeo@montague.lit");
+        Assert.assertEquals(mamPrefIQ1.getNeverJids().get(0).toString(), "montague@montague.lit");
 
         XmlPullParser parser2 = PacketParserUtils.getParserFor(exampleMamPrefsIQ2);
         MamPrefsIQ mamPrefIQ2 = new MamPrefsIQProvider().parse(parser2);
         Assert.assertEquals(IQ.Type.set, mamPrefIQ2.getType());
-        Assert.assertEquals(mamPrefIQ2.getAlwaysJids().get(0), "romeo@montague.lit");
-        Assert.assertEquals(mamPrefIQ2.getAlwaysJids().get(1), "montague@montague.lit");
+        Assert.assertEquals(mamPrefIQ2.getAlwaysJids().get(0).toString(), "romeo@montague.lit");
+        Assert.assertEquals(mamPrefIQ2.getAlwaysJids().get(1).toString(), "montague@montague.lit");
         Assert.assertTrue(mamPrefIQ2.getNeverJids().isEmpty());
 
         XmlPullParser parser3 = PacketParserUtils.getParserFor(exampleMamPrefsIQ3);
@@ -70,7 +70,7 @@ public class MamPrefIQProviderTest extends MamTest {
 
     @Test
     public void checkMamPrefResult() throws Exception {
-        IQ iq = (IQ) PacketParserUtils.parseStanza(exampleMamPrefsResultIQ);
+        IQ iq = PacketParserUtils.parseStanza(exampleMamPrefsResultIQ);
 
         MamPrefsIQ mamPrefsIQ = (MamPrefsIQ) iq;
 

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

@@ -32,7 +32,7 @@ import org.junit.Test;
 
 public class MamQueryIQProviderTest {
 
-    String exampleMamQueryIQ1 = "<iq type='set' id='query4'>" + "<query xmlns='urn:xmpp:mam:1' queryid='test'>"
+    private static final String exampleMamQueryIQ1 = "<iq type='set' id='query4'>" + "<query xmlns='urn:xmpp:mam:1' queryid='test'>"
             + "<x xmlns='jabber:x:data' type='submit'>" + "<field type='hidden' var='FORM_TYPE'>"
             + "<value>urn:xmpp:mam:1</value>" + "</field>"
             + "<field type='text-single' var='urn:example:xmpp:free-text-search'>"
@@ -41,7 +41,7 @@ public class MamQueryIQProviderTest {
             + "<value>{http://jabber.org/protocol/mood}mood/lonely</value>" + "</field>" + "</x>" + "</query>"
             + "</iq>";
 
-    String exampleMamQueryIQ2 = "<iq type='result' id='form1'>" + "<query xmlns='urn:xmpp:mam:1'>"
+    private static final String exampleMamQueryIQ2 = "<iq type='result' id='form1'>" + "<query xmlns='urn:xmpp:mam:1'>"
             + "<x xmlns='jabber:x:data' type='form'>" + "<field type='hidden' var='FORM_TYPE'>"
             + "<value>urn:xmpp:mam:1</value>" + "</field>" + "<field type='jid-single' var='with'/>"
             + "<field type='text-single' var='start'/>" + "<field type='text-single' var='end'/>"
@@ -51,7 +51,7 @@ public class MamQueryIQProviderTest {
     @Test
     public void checkMamQueryIQProvider() throws Exception {
         // example 1
-        IQ iq1 = (IQ) PacketParserUtils.parseStanza(exampleMamQueryIQ1);
+        IQ iq1 = PacketParserUtils.parseStanza(exampleMamQueryIQ1);
         MamQueryIQ mamQueryIQ1 = (MamQueryIQ) iq1;
 
         Assert.assertEquals(mamQueryIQ1.getType(), Type.set);
@@ -67,7 +67,7 @@ public class MamQueryIQProviderTest {
         Assert.assertEquals(fields1.get(2).getValues().get(0), "{http://jabber.org/protocol/mood}mood/lonely");
 
         // example2
-        IQ iq2 = (IQ) PacketParserUtils.parseStanza(exampleMamQueryIQ2);
+        IQ iq2 = PacketParserUtils.parseStanza(exampleMamQueryIQ2);
         MamQueryIQ mamQueryIQ2 = (MamQueryIQ) iq2;
 
         Assert.assertEquals(mamQueryIQ2.getType(), Type.result);

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

@@ -33,14 +33,14 @@ import org.xmlpull.v1.XmlPullParser;
 
 public class MamResultProviderTest {
 
-    String exampleMamResultXml = "<result xmlns='urn:xmpp:mam:1' queryid='f27' id='28482-98726-73623'>"
+    private static final String exampleMamResultXml = "<result xmlns='urn:xmpp:mam:1' queryid='f27' id='28482-98726-73623'>"
             + "<forwarded xmlns='urn:xmpp:forward:0'>" + "<delay xmlns='urn:xmpp:delay' stamp='2010-07-10T23:08:25Z'/>"
             + "<message xmlns='jabber:client'" + "to='juliet@capulet.lit/balcony'" + "from='romeo@montague.lit/orchard'"
             + "type='chat'>"
             + "<body>Call me but love, and I'll be new baptized; Henceforth I never will be Romeo.</body>"
             + "</message>" + "</forwarded>" + "</result>";
 
-    String exampleResultMessage = "<message id='aeb213' to='juliet@capulet.lit/chamber'>"
+    private static final String exampleResultMessage = "<message id='aeb213' to='juliet@capulet.lit/chamber'>"
             + "<result xmlns='urn:xmpp:mam:1' queryid='f27' id='28482-98726-73623'>"
             + "<forwarded xmlns='urn:xmpp:forward:0'>" + "<delay xmlns='urn:xmpp:delay' stamp='2010-07-10T23:08:25Z'/>"
             + "<message xmlns='jabber:client' from='witch@shakespeare.lit' to='macbeth@shakespeare.lit'>"
@@ -62,15 +62,15 @@ public class MamResultProviderTest {
         Assert.assertEquals(forwarded.getDelayInformation().getStamp(), date);
 
         Message message = (Message) forwarded.getForwardedStanza();
-        Assert.assertEquals(message.getFrom(), "romeo@montague.lit/orchard");
-        Assert.assertEquals(message.getTo(), "juliet@capulet.lit/balcony");
+        Assert.assertEquals(message.getFrom().toString(), "romeo@montague.lit/orchard");
+        Assert.assertEquals(message.getTo().toString(), "juliet@capulet.lit/balcony");
         Assert.assertEquals(message.getBody(),
                 "Call me but love, and I'll be new baptized; Henceforth I never will be Romeo.");
     }
 
     @Test
     public void checkResultsParse() throws Exception {
-        Message message = (Message) PacketParserUtils.parseStanza(exampleResultMessage);
+        Message message = PacketParserUtils.parseStanza(exampleResultMessage);
         MamResultExtension mamResultExtension = MamResultExtension.from(message);
 
         Assert.assertEquals(mamResultExtension.getQueryId(), "f27");
@@ -84,8 +84,8 @@ public class MamResultProviderTest {
         Assert.assertEquals(forwarded.getDelayInformation().getStamp(), date);
 
         Message forwardedMessage = (Message) forwarded.getForwardedStanza();
-        Assert.assertEquals(forwardedMessage.getFrom(), "witch@shakespeare.lit");
-        Assert.assertEquals(forwardedMessage.getTo(), "macbeth@shakespeare.lit");
+        Assert.assertEquals(forwardedMessage.getFrom().toString(), "witch@shakespeare.lit");
+        Assert.assertEquals(forwardedMessage.getTo().toString(), "macbeth@shakespeare.lit");
         Assert.assertEquals(forwardedMessage.getBody(), "Hail to thee");
     }
 

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

@@ -30,10 +30,10 @@ import org.jxmpp.jid.impl.JidCreate;
 
 public class PreferencesTest {
 
-    String retrievePrefsStanzaExample = "<iq id='sarasa' type='get'>" + "<prefs xmlns='" + MamElements.NAMESPACE
+    private static final String retrievePrefsStanzaExample = "<iq id='sarasa' type='get'>" + "<prefs xmlns='" + MamElements.NAMESPACE
             + "'/>" + "</iq>";
 
-    String updatePrefsStanzaExample = "<iq id='sarasa' type='set'>" + "<prefs xmlns='" + MamElements.NAMESPACE
+    private static final String updatePrefsStanzaExample = "<iq id='sarasa' type='set'>" + "<prefs xmlns='" + MamElements.NAMESPACE
             + "' default='roster'>" + "<always>" + "<jid>romeo@montague.lit</jid>" + "<jid>other@montague.lit</jid>"
             + "</always>" + "<never>" + "<jid>montague@montague.lit</jid>" + "</never>" + "</prefs>" + "</iq>";
 

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

@@ -37,11 +37,11 @@ import org.jxmpp.jid.impl.JidCreate;
 
 public class QueryArchiveTest extends MamTest {
 
-    String mamSimpleQueryIQ = "<iq id='sarasa' type='set'>" + "<query xmlns='urn:xmpp:mam:1' queryid='testid'>"
+    private static final String mamSimpleQueryIQ = "<iq id='sarasa' type='set'>" + "<query xmlns='urn:xmpp:mam:1' queryid='testid'>"
             + "<x xmlns='jabber:x:data' type='submit'>" + "<field var='FORM_TYPE' type='hidden'>" + "<value>"
             + MamElements.NAMESPACE + "</value>" + "</field>" + "</x>" + "</query>" + "</iq>";
 
-    String mamQueryResultExample = "<message to='hag66@shakespeare.lit/pda' from='coven@chat.shakespeare.lit' id='iasd207'>"
+    private static final String mamQueryResultExample = "<message to='hag66@shakespeare.lit/pda' from='coven@chat.shakespeare.lit' id='iasd207'>"
             + "<result xmlns='urn:xmpp:mam:1' queryid='g27' id='34482-21985-73620'>"
             + "<forwarded xmlns='urn:xmpp:forward:0'>"
             + "<delay xmlns='urn:xmpp:delay' stamp='2002-10-13T23:58:37.000+00:00'></delay>" + "<message "

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

@@ -29,7 +29,7 @@ import org.junit.Test;
 
 public class ResultsLimitTest extends MamTest {
 
-    String resultsLimitStanza = "<iq id='sarasa' type='set'>" + "<query xmlns='urn:xmpp:mam:1' queryid='testid'>"
+    private static final String resultsLimitStanza = "<iq id='sarasa' type='set'>" + "<query xmlns='urn:xmpp:mam:1' queryid='testid'>"
             + "<x xmlns='jabber:x:data' type='submit'>" + "<field var='FORM_TYPE' type='hidden'>" + "<value>"
             + MamElements.NAMESPACE + "</value>" + "</field>" + "</x>" + "<set xmlns='http://jabber.org/protocol/rsm'>"
             + "<max>10</max>" + "</set>" + "</query>" + "</iq>";