Jingle Extension added to Smack Repository

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@6517 b35dd754-fafc-0310-a699-88a17e54d16e

jingle/extension/source/org/jivesoftware/smackx/provider/JingleContentDescriptionProvider.java

@@ -0,0 +1,125 @@
+package org.jivesoftware.smackx.provider;
+
+import org.jivesoftware.smack.packet.PacketExtension;
+import org.jivesoftware.smack.provider.PacketExtensionProvider;
+import org.jivesoftware.smackx.jingle.media.PayloadType;
+import org.jivesoftware.smackx.packet.JingleContentDescription;
+import org.jivesoftware.smackx.packet.JingleContentDescription.JinglePayloadType;
+import org.xmlpull.v1.XmlPullParser;
+
+/**
+ * Parser for a Jingle description
+ *
+ * @author Alvaro Saurin <alvaro.saurin@gmail.com>
+ */
+public abstract class JingleContentDescriptionProvider implements PacketExtensionProvider {
+
+    /**
+     * Default constructor
+     */
+    public JingleContentDescriptionProvider() {
+        super();
+    }
+
+    /**
+     * Parse a iq/jingle/description/payload-type element.
+     *
+     * @param parser the input to parse
+     * @return a payload type element
+     * @throws Exception
+     */
+    protected JinglePayloadType parsePayload(final XmlPullParser parser)
+            throws Exception {
+        int ptId = 0;
+        String ptName;
+        int ptChannels = 0;
+
+        try {
+            ptId = Integer.parseInt(parser.getAttributeValue("", "id"));
+        } catch (Exception e) {
+        }
+
+        ptName = parser.getAttributeValue("", "name");
+
+        try {
+            ptChannels = Integer.parseInt(parser.getAttributeValue("", "channels"));
+        } catch (Exception e) {
+        }
+
+        return new JinglePayloadType(new PayloadType(ptId, ptName, ptChannels));
+    }
+
+    /**
+     * Parse a iq/jingle/description element.
+     *
+     * @param parser the input to parse
+     * @return a description element
+     * @throws Exception
+     */
+    public PacketExtension parseExtension(final XmlPullParser parser) throws Exception {
+        boolean done = false;
+        JingleContentDescription desc = getInstance();
+
+        while (!done) {
+            int eventType = parser.next();
+            String name = parser.getName();
+
+            if (eventType == XmlPullParser.START_TAG) {
+                if (name.equals(JingleContentDescription.JinglePayloadType.NODENAME)) {
+                    desc.addJinglePayloadType(parsePayload(parser));
+                } else {
+                    throw new Exception("Unknow element \"" + name + "\" in content.");
+                }
+            } else if (eventType == XmlPullParser.END_TAG) {
+                if (name.equals(JingleContentDescription.NODENAME)) {
+                    done = true;
+                }
+            }
+        }
+        return desc;
+    }
+
+    /**
+     * Return a new instance of this class. Subclasses must overwrite this
+     * method.
+     */
+    protected abstract JingleContentDescription getInstance();
+
+    /**
+     * Jingle audio
+     */
+    public static class Audio extends JingleContentDescriptionProvider {
+
+        /**
+         * Default constructor
+         */
+        public Audio() {
+            super();
+        }
+
+        /**
+         * Parse an audio payload type.
+         */
+        public JinglePayloadType parsePayload(final XmlPullParser parser)
+                throws Exception {
+            JinglePayloadType pte = super.parsePayload(parser);
+            PayloadType.Audio pt = new PayloadType.Audio(pte.getPayloadType());
+            int ptClockRate = 0;
+
+            try {
+                ptClockRate = Integer.parseInt(parser.getAttributeValue("", "clockrate"));
+            } catch (Exception e) {
+            }
+            pt.setClockRate(ptClockRate);
+
+            return new JinglePayloadType.Audio(pt);
+        }
+
+        /**
+         * Get a new instance of this object.
+         */
+        protected JingleContentDescription getInstance() {
+            return new JingleContentDescription.Audio();
+		}
+	}
+}