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 */ 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(); } } }