Merge branch '4.0'

Conflicts:
	smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/FileTransferManager.java
	smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/FileTransferNegotiator.java
	smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/Node.java
	smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/PubSubManager.java
	smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/ibb/InBandBytestreamRequestTest.java
	smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/ibb/InitiationListenerTest.java
	smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/socks5/InitiationListenerTest.java

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

@@ -211,7 +211,8 @@ public abstract class Packet {
      * @param namespace the XML element namespace of the packet extension.
      * @return the extension, or <tt>null</tt> if it doesn't exist.
      */
-    public PacketExtension getExtension(String elementName, String namespace) {
+    @SuppressWarnings("unchecked")
+    public <PE extends PacketExtension> PE getExtension(String elementName, String namespace) {
         if (namespace == null) {
             return null;
         }
@@ -219,7 +220,7 @@ public abstract class Packet {
             if ((elementName == null || elementName.equals(ext.getElementName()))
                     && namespace.equals(ext.getNamespace()))
             {
-                return ext;
+                return (PE) ext;
             }
         }
         return null;

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

@@ -40,7 +40,7 @@ import org.jivesoftware.smack.util.XmlStringBuilder;
  *      <tr><td>feature-not-implemented</td><td>CANCEL</td></tr>
  *      <tr><td>gone</td><td>MODIFY</td></tr>
  *      <tr><td>jid-malformed</td><td>MODIFY</td></tr>
- *      <tr><td>no-acceptable</td><td> MODIFY</td></tr>
+ *      <tr><td>not-acceptable</td><td> MODIFY</td></tr>
  *      <tr><td>not-allowed</td><td>CANCEL</td></tr>
  *      <tr><td>not-authorized</td><td>AUTH</td></tr>
  *      <tr><td>payment-required</td><td>AUTH</td></tr>
@@ -282,7 +282,7 @@ public class XMPPError {
         public static final Condition gone = new Condition("gone");
         public static final Condition item_not_found = new Condition("item-not-found");
         public static final Condition jid_malformed = new Condition("jid-malformed");
-        public static final Condition no_acceptable = new Condition("not-acceptable");
+        public static final Condition not_acceptable = new Condition("not-acceptable");
         public static final Condition not_allowed = new Condition("not-allowed");
         public static final Condition not_authorized = new Condition("not-authorized");
         public static final Condition payment_required = new Condition("payment-required");
@@ -354,8 +354,8 @@ public class XMPPError {
                     Condition.gone, Type.MODIFY));
             instances.put(Condition.jid_malformed, new XMPPError.ErrorSpecification(
                     Condition.jid_malformed, Type.MODIFY));
-            instances.put(Condition.no_acceptable, new XMPPError.ErrorSpecification(
+            instances.put(Condition.not_acceptable, new XMPPError.ErrorSpecification(
-                    Condition.no_acceptable, Type.MODIFY));
+                    Condition.not_acceptable, Type.MODIFY));
             instances.put(Condition.not_allowed, new XMPPError.ErrorSpecification(
                     Condition.not_allowed, Type.CANCEL));
             instances.put(Condition.not_authorized, new XMPPError.ErrorSpecification(

smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/ibb/InBandBytestreamManager.java

@@ -447,7 +447,7 @@ public class InBandBytestreamManager implements BytestreamManager {
      * @throws NotConnectedException 
      */
     protected void replyRejectPacket(IQ request) throws NotConnectedException {
-        XMPPError xmppError = new XMPPError(XMPPError.Condition.no_acceptable);
+        XMPPError xmppError = new XMPPError(XMPPError.Condition.not_acceptable);
         IQ error = IQ.createErrorResponse(request, xmppError);
         this.connection.sendPacket(error);
     }

smack-extensions/src/main/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5BytestreamManager.java

@@ -699,12 +699,15 @@ public final class Socks5BytestreamManager implements BytestreamManager {
     /**
      * Responses to the given packet's sender with a XMPP error that a SOCKS5 Bytestream is not
      * accepted.
+     * <p>
+     * Specified in XEP-65 5.3.1 (Example 13)
+     * </p>
      * 
      * @param packet Packet that should be answered with a not-acceptable error
      * @throws NotConnectedException 
      */
     protected void replyRejectPacket(IQ packet) throws NotConnectedException {
-        XMPPError xmppError = new XMPPError(XMPPError.Condition.no_acceptable);
+        XMPPError xmppError = new XMPPError(XMPPError.Condition.not_acceptable);
         IQ errorIQ = IQ.createErrorResponse(packet, xmppError);
         this.connection.sendPacket(errorIQ);
     }

smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/FileTransferManager.java

@@ -156,10 +156,23 @@ public class FileTransferManager extends Manager {
 		return transfer;
 	}
 
+	/**
+	 * Reject an incoming file transfer.
+	 * <p>
+	 * Specified in XEP-95 4.2 and 3.2 Example 8
+	 * </p>
+	 * @param request
+	 * @throws NotConnectedException
+	 */
 	protected void rejectIncomingFileTransfer(FileTransferRequest request) throws NotConnectedException {
 		StreamInitiation initiation = request.getStreamInitiation();
 
-		IQ rejection = IQ.createErrorResponse(initiation, new XMPPError(XMPPError.Condition.no_acceptable));
+        // Reject as specified in XEP-95 4.2. Note that this is not to be confused with the Socks 5
+        // Bytestream rejection as specified in XEP-65 5.3.1 Example 13, which says that
+        // 'not-acceptable' should be returned. This is done by Smack in
+        // Socks5BytestreamManager.replyRejectPacket(IQ).
+        IQ rejection = IQ.createErrorResponse(initiation, new XMPPError(
+                        XMPPError.Condition.forbidden));
         connection().sendPacket(rejection);
 	}
 }

smack-extensions/src/main/java/org/jivesoftware/smackx/filetransfer/FileTransferNegotiator.java

@@ -254,18 +254,6 @@ public class FileTransferNegotiator extends Manager {
         }
     }
 
-    /**
-     * Reject a stream initiation request from a remote user.
-     *
-     * @param si The Stream Initiation request to reject.
-     * @throws NotConnectedException 
-     */
-    public void rejectStream(final StreamInitiation si) throws NotConnectedException {
-        XMPPError error = new XMPPError(XMPPError.Condition.forbidden, "Offer Declined");
-        IQ iqPacket = IQ.createErrorResponse(si, error);
-        connection().sendPacket(iqPacket);
-    }
-
     /**
      * Returns a new, unique, stream ID to identify a file transfer.
      *

smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/Node.java

@@ -98,7 +98,9 @@ abstract public class Node
 	 */
 	public ConfigureForm getNodeConfiguration() throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		Packet reply = sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.CONFIGURE_OWNER, getId()), PubSubNamespace.OWNER);
+        PubSub pubSub = createPubsubPacket(Type.get, new NodeExtension(
+                        PubSubElementType.CONFIGURE_OWNER, getId()), PubSubNamespace.OWNER);
+		Packet reply = sendPubsubPacket(pubSub);
 		return NodeUtils.getFormFromPacket(reply, PubSubElementType.CONFIGURE_OWNER);
 	}
 	
@@ -112,7 +114,8 @@ abstract public class Node
 	 */
 	public void sendConfigurationForm(Form submitForm) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		PubSub packet = createPubsubPacket(Type.set, new FormNode(FormNodeType.CONFIGURE_OWNER, getId(), submitForm), PubSubNamespace.OWNER);
+        PubSub packet = createPubsubPacket(Type.set, new FormNode(FormNodeType.CONFIGURE_OWNER,
+                        getId(), submitForm), PubSubNamespace.OWNER);
 		con.createPacketCollectorAndSend(packet).nextResultOrThrow();
 	}
 	
@@ -143,11 +146,85 @@ abstract public class Node
 	 */
 	public List<Subscription> getSubscriptions() throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		PubSub reply = (PubSub)sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.SUBSCRIPTIONS, getId()));
+        return getSubscriptions(null, null);
-		SubscriptionsExtension subElem = (SubscriptionsExtension)reply.getExtension(PubSubElementType.SUBSCRIPTIONS);
+	}
+
+    /**
+     * Get the subscriptions currently associated with this node.
+     * <p>
+     * {@code additionalExtensions} can be used e.g. to add a "Result Set Management" extension.
+     * {@code returnedExtensions} will be filled with the packet extensions found in the answer.
+     * </p>
+     *
+     * @param additionalExtensions
+     * @param returnedExtensions a collection that will be filled with the returned packet
+     *        extensions
+     * @return List of {@link Subscription}
+     * @throws NoResponseException
+     * @throws XMPPErrorException
+     * @throws NotConnectedException
+     */
+    public List<Subscription> getSubscriptions(List<PacketExtension> additionalExtensions, Collection<PacketExtension> returnedExtensions)
+                    throws NoResponseException, XMPPErrorException, NotConnectedException {
+        PubSub pubSub = createPubsubPacket(Type.get, new NodeExtension(
+                        PubSubElementType.SUBSCRIPTIONS, getId()));
+        if (additionalExtensions != null) {
+            for (PacketExtension pe : additionalExtensions) {
+                pubSub.addExtension(pe);
+            }
+        }
+        PubSub reply = (PubSub) sendPubsubPacket(pubSub);
+        if (returnedExtensions != null) {
+            returnedExtensions.addAll(reply.getExtensions());
+        }
+        SubscriptionsExtension subElem = (SubscriptionsExtension) reply.getExtension(PubSubElementType.SUBSCRIPTIONS);
         return subElem.getSubscriptions();
     }
 
+	/**
+	 * Get the affiliations of this node.
+	 *
+	 * @return List of {@link Affiliation}
+	 * @throws NoResponseException
+	 * @throws XMPPErrorException
+	 * @throws NotConnectedException
+	 */
+    public List<Affiliation> getAffiliations() throws NoResponseException, XMPPErrorException,
+                    NotConnectedException {
+        return getAffiliations(null, null);
+    }
+
+    /**
+     * Get the affiliations of this node.
+     * <p>
+     * {@code additionalExtensions} can be used e.g. to add a "Result Set Management" extension.
+     * {@code returnedExtensions} will be filled with the packet extensions found in the answer.
+     * </p>
+     *
+     * @param additionalExtensions additional {@code PacketExtensions} add to the request
+     * @param returnedExtensions a collection that will be filled with the returned packet
+     *        extensions
+     * @return List of {@link Affiliation}
+     * @throws NoResponseException
+     * @throws XMPPErrorException
+     * @throws NotConnectedException
+     */
+    public List<Affiliation> getAffiliations(List<PacketExtension> additionalExtensions, Collection<PacketExtension> returnedExtensions)
+                    throws NoResponseException, XMPPErrorException, NotConnectedException {
+        PubSub pubSub = createPubsubPacket(Type.get, new NodeExtension(PubSubElementType.AFFILIATIONS, getId()));
+        if (additionalExtensions != null) {
+            for (PacketExtension pe : additionalExtensions) {
+                pubSub.addExtension(pe);
+            }
+        }
+        PubSub reply = (PubSub) sendPubsubPacket(pubSub);
+        if (returnedExtensions != null) {
+            returnedExtensions.addAll(reply.getExtensions());
+        }
+        AffiliationsExtension affilElem = (AffiliationsExtension) reply.getExtension(PubSubElementType.AFFILIATIONS);
+        return affilElem.getAffiliations();
+    }
+
 	/**
 	 * The user subscribes to the node using the supplied jid.  The
 	 * bare jid portion of this one must match the jid for the connection.
@@ -167,7 +244,8 @@ abstract public class Node
 	 */
 	public Subscription subscribe(String jid) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		PubSub reply = (PubSub)sendPubsubPacket(Type.set, new SubscribeExtension(jid, getId()));
+	    PubSub pubSub = createPubsubPacket(Type.set, new SubscribeExtension(jid, getId()));
+		PubSub reply = (PubSub)sendPubsubPacket(pubSub);
 		return (Subscription)reply.getExtension(PubSubElementType.SUBSCRIPTION);
 	}
 	
@@ -193,7 +271,7 @@ abstract public class Node
 	{
 	    PubSub request = createPubsubPacket(Type.set, new SubscribeExtension(jid, getId()));
 		request.addExtension(new FormNode(FormNodeType.OPTIONS, subForm));
-		PubSub reply = (PubSub)PubSubManager.sendPubsubPacket(con, jid, Type.set, request);
+		PubSub reply = (PubSub)PubSubManager.sendPubsubPacket(con, request);
 		return (Subscription)reply.getExtension(PubSubElementType.SUBSCRIPTION);
 	}
 
@@ -224,7 +302,7 @@ abstract public class Node
 	 */
 	public void unsubscribe(String jid, String subscriptionId) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		sendPubsubPacket(Type.set, new UnsubscribeExtension(jid, getId(), subscriptionId));
+		sendPubsubPacket(createPubsubPacket(Type.set, new UnsubscribeExtension(jid, getId(), subscriptionId)));
 	}
 
 	/**
@@ -256,7 +334,7 @@ abstract public class Node
 	 */
 	public SubscribeForm getSubscriptionOptions(String jid, String subscriptionId) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		PubSub packet = (PubSub)sendPubsubPacket(Type.get, new OptionsExtension(jid, getId(), subscriptionId));
+		PubSub packet = (PubSub)sendPubsubPacket(createPubsubPacket(Type.get, new OptionsExtension(jid, getId(), subscriptionId)));
 		FormNode ext = (FormNode)packet.getExtension(PubSubElementType.OPTIONS);
 		return new SubscribeForm(ext.getForm());
 	}
@@ -357,17 +435,12 @@ abstract public class Node
 	
 	protected PubSub createPubsubPacket(Type type, PacketExtension ext, PubSubNamespace ns)
 	{
-		return PubSubManager.createPubsubPacket(to, type, ext, ns);
+		return PubSub.createPubsubPacket(to, type, ext, ns);
 	}
 
-	protected Packet sendPubsubPacket(Type type, NodeExtension ext) throws NoResponseException, XMPPErrorException, NotConnectedException
+	protected Packet sendPubsubPacket(PubSub packet) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		return PubSubManager.sendPubsubPacket(con, to, type, ext);
+		return PubSubManager.sendPubsubPacket(con, packet);
-	}
-
-	protected Packet sendPubsubPacket(Type type, NodeExtension ext, PubSubNamespace ns) throws NoResponseException, XMPPErrorException, NotConnectedException
-	{
-		return PubSubManager.sendPubsubPacket(con, to, type, ext, ns);
 	}
 
 

smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/PubSubManager.java

@@ -16,6 +16,7 @@
  */
 package org.jivesoftware.smackx.pubsub;
 
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
@@ -86,7 +87,7 @@ final public class PubSubManager
 	 */
 	public LeafNode createNode() throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		PubSub reply = (PubSub)sendPubsubPacket(Type.set, new NodeExtension(PubSubElementType.CREATE));
+		PubSub reply = (PubSub)sendPubsubPacket(Type.set, new NodeExtension(PubSubElementType.CREATE), null);
 		NodeExtension elem = (NodeExtension)reply.getExtension("create", PubSubNamespace.BASIC.getXmlns());
 		
 		LeafNode newNode = new LeafNode(con, elem.getNode());
@@ -126,7 +127,7 @@ final public class PubSubManager
 	 */
 	public Node createNode(String name, Form config) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		PubSub request = createPubsubPacket(to, Type.set, new NodeExtension(PubSubElementType.CREATE, name));
+		PubSub request = PubSub.createPubsubPacket(to, Type.set, new NodeExtension(PubSubElementType.CREATE, name), null);
 		boolean isLeafNode = true;
 		
 		if (config != null)
@@ -140,7 +141,7 @@ final public class PubSubManager
 
 		// Errors will cause exceptions in getReply, so it only returns
 		// on success.
-		sendPubsubPacket(con, to, Type.set, request);
+		sendPubsubPacket(con, request);
 		Node newNode = isLeafNode ? new LeafNode(con, name) : new CollectionNode(con, name);
 		newNode.setTo(to);
 		nodeMap.put(newNode.getId(), newNode);
@@ -217,7 +218,7 @@ final public class PubSubManager
 	 */
 	public List<Subscription> getSubscriptions() throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		Packet reply = sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.SUBSCRIPTIONS));
+		Packet reply = sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.SUBSCRIPTIONS), null);
 		SubscriptionsExtension subElem = (SubscriptionsExtension)reply.getExtension(PubSubElementType.SUBSCRIPTIONS.getElementName(), PubSubElementType.SUBSCRIPTIONS.getNamespace().getXmlns());
 		return subElem.getSubscriptions();
 	}
@@ -233,7 +234,7 @@ final public class PubSubManager
 	 */
 	public List<Affiliation> getAffiliations() throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		PubSub reply = (PubSub)sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.AFFILIATIONS));
+		PubSub reply = (PubSub)sendPubsubPacket(Type.get, new NodeExtension(PubSubElementType.AFFILIATIONS), null);
 		AffiliationsExtension listElem = (AffiliationsExtension)reply.getExtension(PubSubElementType.AFFILIATIONS);
 		return listElem.getAffiliations();
 	}
@@ -283,52 +284,21 @@ final public class PubSubManager
 		return mgr.discoverInfo(to);
 	}
 
-	private Packet sendPubsubPacket(Type type, PacketExtension ext, PubSubNamespace ns) throws NoResponseException, XMPPErrorException, NotConnectedException
+    private Packet sendPubsubPacket(Type type, PacketExtension ext, PubSubNamespace ns)
-	{
+                    throws NoResponseException, XMPPErrorException, NotConnectedException {
-		return sendPubsubPacket(con, to, type, ext, ns);
+        return sendPubsubPacket(con, to, type, Collections.singletonList(ext), ns);
     }
 
-	private Packet sendPubsubPacket(Type type, PacketExtension ext) throws NoResponseException, XMPPErrorException, NotConnectedException
+	static Packet sendPubsubPacket(XMPPConnection con, String to, Type type, List<PacketExtension> extList, PubSubNamespace ns) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
-		return sendPubsubPacket(type, ext, null);
+	    PubSub pubSub = new PubSub(to, type, ns);
+	    for (PacketExtension pe : extList) {
+	        pubSub.addExtension(pe);
+	    }
+		return sendPubsubPacket(con ,pubSub);
 	}
 
-	static PubSub createPubsubPacket(String to, Type type, PacketExtension ext)
+	static Packet sendPubsubPacket(XMPPConnection con, PubSub packet) throws NoResponseException, XMPPErrorException, NotConnectedException
-	{
-		return createPubsubPacket(to, type, ext, null);
-	}
-	
-	static PubSub createPubsubPacket(String to, Type type, PacketExtension ext, PubSubNamespace ns)
-	{
-		PubSub request = new PubSub();
-		request.setTo(to);
-		request.setType(type);
-		
-		if (ns != null)
-		{
-			request.setPubSubNamespace(ns);
-		}
-		request.addExtension(ext);
-		
-		return request;
-	}
-
-	static Packet sendPubsubPacket(XMPPConnection con, String to, Type type, PacketExtension ext) throws NoResponseException, XMPPErrorException, NotConnectedException
-	{
-		return sendPubsubPacket(con, to, type, ext, null);
-	}
-	
-	static Packet sendPubsubPacket(XMPPConnection con, String to, Type type, PacketExtension ext, PubSubNamespace ns) throws NoResponseException, XMPPErrorException, NotConnectedException
-	{
-		return con.createPacketCollectorAndSend(createPubsubPacket(to, type, ext, ns)).nextResultOrThrow();
-	}
-
-	static Packet sendPubsubPacket(XMPPConnection con, String to, Type type, PubSub packet) throws NoResponseException, XMPPErrorException, NotConnectedException
-	{
-		return sendPubsubPacket(con, to, type, packet, null);
-	}
-
-	static Packet sendPubsubPacket(XMPPConnection con, String to, Type type, PubSub packet, PubSubNamespace ns) throws NoResponseException, XMPPErrorException, NotConnectedException
 	{
 		return con.createPacketCollectorAndSend(packet).nextResultOrThrow();
 	}

smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/packet/PubSub.java

@@ -29,15 +29,33 @@ import org.jivesoftware.smackx.pubsub.PubSubElementType;
  */
 public class PubSub extends IQ
 {
+    public static final String ELEMENT = "pubsub";
+    public static final String NAMESPACE = "http://jabber.org/protocol/pubsub";
+
 	private PubSubNamespace ns = PubSubNamespace.BASIC;
 
+	public PubSub() {
+	}
+
+	public PubSub(String to, Type type) {
+        setTo(to);
+        setType(type);
+    }
+
+    public PubSub(String to, Type type, PubSubNamespace ns) {
+        this(to, type);
+        if (ns != null) {
+            setPubSubNamespace(ns);
+        }
+    }
+
 	/**
     * Returns the XML element name of the extension sub-packet root element.
     *
     * @return the XML element name of the packet extension.
     */
     public String getElementName() {
-        return "pubsub";
+        return ELEMENT;
     }
 
     /** 
@@ -106,4 +124,9 @@ public class PubSub extends IQ
         return buf.toString();
     }
 
+    public static PubSub createPubsubPacket(String to, Type type, PacketExtension extension, PubSubNamespace ns) {
+        PubSub pubSub = new PubSub(to, type, ns);
+        pubSub.addExtension(extension);
+        return pubSub;
+    }
 }

smack-extensions/src/main/java/org/jivesoftware/smackx/pubsub/packet/PubSubNamespace.java

@@ -40,7 +40,7 @@ public enum PubSubNamespace
 	
 	public String getXmlns()
 	{
-		String ns = "http://jabber.org/protocol/pubsub";
+		String ns = PubSub.NAMESPACE;
 		
 		if (fragment != null)
 			ns += '#' + fragment;

smack-extensions/src/main/java/org/jivesoftware/smackx/receipts/DeliveryReceipt.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright the original author or authors
+ * Copyright 2013-2014 the original author or authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -19,6 +19,7 @@ package org.jivesoftware.smackx.receipts;
 import java.util.List;
 import java.util.Map;
 
+import org.jivesoftware.smack.packet.Packet;
 import org.jivesoftware.smack.packet.PacketExtension;
 import org.jivesoftware.smack.provider.EmbeddedExtensionProvider;
 
@@ -63,6 +64,16 @@ public class DeliveryReceipt implements PacketExtension
         return "<received xmlns='" + NAMESPACE + "' id='" + id + "'/>";
     }
 
+    /**
+     * Get the {@link DeliveryReceipt} extension of the packet, if any.
+     *
+     * @param p the packet
+     * @return the {@link DeliveryReceipt} extension or {@code null}
+     */
+    public static DeliveryReceipt getFrom(Packet p) {
+        return p.getExtension(ELEMENT, NAMESPACE);
+    }
+
     /**
      * This Provider parses and returns DeliveryReceipt packets.
      */

smack-extensions/src/main/java/org/jivesoftware/smackx/receipts/DeliveryReceiptManager.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2013 Georg Lukas
+ * Copyright 2013-2014 Georg Lukas
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -44,8 +44,7 @@ import org.jivesoftware.smackx.disco.ServiceDiscoveryManager;
  */
 public class DeliveryReceiptManager extends Manager implements PacketListener {
 
-    private static Map<XMPPConnection, DeliveryReceiptManager> instances =
+    private static Map<XMPPConnection, DeliveryReceiptManager> instances = new WeakHashMap<XMPPConnection, DeliveryReceiptManager>();
-            Collections.synchronizedMap(new WeakHashMap<XMPPConnection, DeliveryReceiptManager>());
 
     static {
         XMPPConnectionRegistry.addConnectionCreationListener(new ConnectionCreationListener() {
@@ -63,7 +62,6 @@ public class DeliveryReceiptManager extends Manager implements PacketListener {
         super(connection);
         ServiceDiscoveryManager sdm = ServiceDiscoveryManager.getInstanceFor(connection);
         sdm.addFeature(DeliveryReceipt.NAMESPACE);
-        instances.put(connection, this);
 
         // register listener for delivery receipts and requests
         connection.addPacketListener(this, new PacketExtensionFilter(DeliveryReceipt.NAMESPACE));
@@ -81,6 +79,7 @@ public class DeliveryReceiptManager extends Manager implements PacketListener {
 
         if (receiptManager == null) {
             receiptManager = new DeliveryReceiptManager(connection);
+            instances.put(connection, receiptManager);
         }
 
         return receiptManager;
@@ -102,20 +101,17 @@ public class DeliveryReceiptManager extends Manager implements PacketListener {
     // handle incoming receipts and receipt requests
     @Override
     public void processPacket(Packet packet) throws NotConnectedException {
-        DeliveryReceipt dr = (DeliveryReceipt)packet.getExtension(
+        DeliveryReceipt dr = DeliveryReceipt.getFrom(packet);
-                DeliveryReceipt.ELEMENT, DeliveryReceipt.NAMESPACE);
         if (dr != null) {
             // notify listeners of incoming receipt
             for (ReceiptReceivedListener l : receiptReceivedListeners) {
                 l.onReceiptReceived(packet.getFrom(), packet.getTo(), dr.getId());
             }
-
         }
 
         // if enabled, automatically send a receipt
         if (auto_receipts_enabled) {
-            DeliveryReceiptRequest drr = (DeliveryReceiptRequest)packet.getExtension(
+            DeliveryReceiptRequest drr = DeliveryReceiptRequest.getFrom(packet);
-                    DeliveryReceiptRequest.ELEMENT, DeliveryReceipt.NAMESPACE);
             if (drr != null) {
                 XMPPConnection connection = connection();
                 Message ack = new Message(packet.getFrom(), Message.Type.normal);
@@ -183,8 +179,7 @@ public class DeliveryReceiptManager extends Manager implements PacketListener {
      * @return true if a delivery receipt was requested
      */
     public static boolean hasDeliveryReceiptRequest(Packet p) {
-        return (p.getExtension(DeliveryReceiptRequest.ELEMENT,
+        return (DeliveryReceiptRequest.getFrom(p) != null);
-                    DeliveryReceipt.NAMESPACE) != null);
     }
 
     /**
@@ -194,8 +189,10 @@ public class DeliveryReceiptManager extends Manager implements PacketListener {
      * therefore only allow Message as the parameter type.
      *
      * @param m Message object to add a request to
+     * @return the Message ID which will be used as receipt ID
      */
-    public static void addDeliveryReceiptRequest(Message m) {
+    public static String addDeliveryReceiptRequest(Message m) {
         m.addExtension(new DeliveryReceiptRequest());
+        return m.getPacketID();
     }
 }

smack-extensions/src/main/java/org/jivesoftware/smackx/receipts/DeliveryReceiptRequest.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright the original author or authors
+ * Copyright 2013-2014 the original author or authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,7 @@
  */
 package org.jivesoftware.smackx.receipts;
 
+import org.jivesoftware.smack.packet.Packet;
 import org.jivesoftware.smack.packet.PacketExtension;
 import org.jivesoftware.smack.provider.PacketExtensionProvider;
 import org.xmlpull.v1.XmlPullParser;
@@ -45,6 +46,16 @@ public class DeliveryReceiptRequest implements PacketExtension
         return "<request xmlns='" + DeliveryReceipt.NAMESPACE + "'/>";
     }
 
+    /**
+     * Get the {@link DeliveryReceiptRequest} extension of the packet, if any.
+     *
+     * @param p the packet
+     * @return the {@link DeliveryReceiptRequest} extension or {@code null}
+     */
+    public static DeliveryReceiptRequest getFrom(Packet p) {
+        return p.getExtension(ELEMENT, DeliveryReceipt.NAMESPACE);
+    }
+
     /**
      * This Provider parses and returns DeliveryReceiptRequest packets.
      */

smack-extensions/src/main/java/org/jivesoftware/smackx/receipts/ReceiptReceivedListener.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2013 Georg Lukas
+ * Copyright 2013-2014 Georg Lukas
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -22,5 +22,16 @@ package org.jivesoftware.smackx.receipts;
  * Implement this and add a listener to get notified. 
  */
 public interface ReceiptReceivedListener {
+    /**
+     * Callback invoked when a new receipt got received.
+     * <p>
+     * {@code receiptId} correspondents to the message ID, which can be obtained with
+     * {@link org.jivesoftware.smack.packet.Packet#getPacketID()}.
+     * </p>
+     * 
+     * @param fromJid the jid that send this receipt
+     * @param toJid the jid which received this receipt
+     * @param receiptId the message ID of the packet which has been received and this receipt is for
+     */
     void onReceiptReceived(String fromJid, String toJid, String receiptId);
 }

smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/ibb/InBandBytestreamRequestTest.java

@@ -84,7 +84,7 @@ public class InBandBytestreamRequestTest {
         // assert that reply is the correct error packet
         assertEquals(initiatorJID, argument.getValue().getTo());
         assertEquals(IQ.Type.error, argument.getValue().getType());
-        assertEquals(XMPPError.Condition.no_acceptable.toString(),
+        assertEquals(XMPPError.Condition.not_acceptable.toString(),
                         argument.getValue().getError().getCondition());
 
     }

smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/ibb/InitiationListenerTest.java

@@ -92,7 +92,7 @@ public class InitiationListenerTest {
         // assert that reply is the correct error packet
         assertEquals(initiatorJID, argument.getValue().getTo());
         assertEquals(IQ.Type.error, argument.getValue().getType());
-        assertEquals(XMPPError.Condition.no_acceptable.toString(),
+        assertEquals(XMPPError.Condition.not_acceptable.toString(),
                         argument.getValue().getError().getCondition());
 
     }
@@ -210,7 +210,7 @@ public class InitiationListenerTest {
         // assert that reply is the correct error packet
         assertEquals(initiatorJID, argument.getValue().getTo());
         assertEquals(IQ.Type.error, argument.getValue().getType());
-        assertEquals(XMPPError.Condition.no_acceptable.toString(),
+        assertEquals(XMPPError.Condition.not_acceptable.toString(),
                         argument.getValue().getError().getCondition());
     }
 

smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/socks5/InitiationListenerTest.java

@@ -99,7 +99,7 @@ public class InitiationListenerTest {
         // assert that reply is the correct error packet
         assertEquals(initiatorJID, argument.getValue().getTo());
         assertEquals(IQ.Type.error, argument.getValue().getType());
-        assertEquals(XMPPError.Condition.no_acceptable.toString(),
+        assertEquals(XMPPError.Condition.not_acceptable.toString(),
                         argument.getValue().getError().getCondition());
 
     }
@@ -189,7 +189,7 @@ public class InitiationListenerTest {
         // assert that reply is the correct error packet
         assertEquals(initiatorJID, argument.getValue().getTo());
         assertEquals(IQ.Type.error, argument.getValue().getType());
-        assertEquals(XMPPError.Condition.no_acceptable.toString(),
+        assertEquals(XMPPError.Condition.not_acceptable.toString(),
                         argument.getValue().getError().getCondition());
     }
 

smack-extensions/src/test/java/org/jivesoftware/smackx/bytestreams/socks5/Socks5ByteStreamManagerTest.java

@@ -424,7 +424,7 @@ public class Socks5ByteStreamManagerTest {
                         Verification.requestTypeGET);
 
         // build error packet to reject SOCKS5 Bytestream
-        XMPPError xmppError = new XMPPError(XMPPError.Condition.no_acceptable);
+        XMPPError xmppError = new XMPPError(XMPPError.Condition.not_acceptable);
         IQ rejectPacket = new IQ() {
 
             public String getChildElementXML() {