merged branch improve_bytestreams in trunk

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@11821 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smackx/bytestreams/ibb/packet/Data.java

@@ -0,0 +1,64 @@
+/**
+ * All rights reserved. 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.smackx.bytestreams.ibb.packet;
+
+import org.jivesoftware.smack.packet.IQ;
+
+/**
+ * Represents a chunk of data sent over an In-Band Bytestream encapsulated in an
+ * IQ stanza.
+ * 
+ * @author Henning Staib
+ */
+public class Data extends IQ {
+
+    /* the data packet extension */
+    private final DataPacketExtension dataPacketExtension;
+
+    /**
+     * Constructor.
+     * 
+     * @param data data packet extension containing the encoded data
+     */
+    public Data(DataPacketExtension data) {
+        if (data == null) {
+            throw new IllegalArgumentException("Data must not be null");
+        }
+        this.dataPacketExtension = data;
+
+        /*
+         * also set as packet extension so that data packet extension can be
+         * retrieved from IQ stanza and message stanza in the same way
+         */
+        addExtension(data);
+        setType(IQ.Type.SET);
+    }
+
+    /**
+     * Returns the data packet extension.
+     * <p>
+     * Convenience method for <code>packet.getExtension("data",
+     * "http://jabber.org/protocol/ibb")</code>.
+     * 
+     * @return the data packet extension
+     */
+    public DataPacketExtension getDataPacketExtension() {
+        return this.dataPacketExtension;
+    }
+
+    public String getChildElementXML() {
+        return this.dataPacketExtension.toXML();
+    }
+
+}