001/** 002 * 003 * Copyright 2003-2005 Jive Software. 004 * 005 * Licensed under the Apache License, Version 2.0 (the "License"); 006 * you may not use this file except in compliance with the License. 007 * You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.jivesoftware.smackx.jingleold.provider; 018 019import java.io.IOException; 020 021import org.jivesoftware.smack.packet.XmlEnvironment; 022import org.jivesoftware.smack.provider.ExtensionElementProvider; 023import org.jivesoftware.smack.xml.XmlPullParser; 024import org.jivesoftware.smack.xml.XmlPullParserException; 025 026import org.jivesoftware.smackx.jingleold.media.PayloadType; 027import org.jivesoftware.smackx.jingleold.packet.JingleContentDescription; 028import org.jivesoftware.smackx.jingleold.packet.JingleContentDescription.JinglePayloadType; 029 030/** 031 * Parser for a Jingle description. 032 * 033 * @author Alvaro Saurin 034 */ 035public abstract class JingleContentDescriptionProvider extends ExtensionElementProvider<JingleContentDescription> { 036 037 /** 038 * Parse a iq/jingle/description/payload-type element. 039 * 040 * @param parser the input to parse 041 * @return a payload type element 042 */ 043 protected JinglePayloadType parsePayload(final XmlPullParser parser) { 044 int ptId = 0; 045 String ptName; 046 int ptChannels = 0; 047 048 try { 049 ptId = Integer.parseInt(parser.getAttributeValue("", "id")); 050 } catch (Exception e) { 051 } 052 053 ptName = parser.getAttributeValue("", "name"); 054 055 try { 056 ptChannels = Integer.parseInt(parser.getAttributeValue("", "channels")); 057 } catch (Exception e) { 058 } 059 060 return new JinglePayloadType(new PayloadType(ptId, ptName, ptChannels)); 061 } 062 063 /** 064 * Parse a iq/jingle/description element. 065 * 066 * @param parser the input to parse 067 * @return a description element 068 * @throws IOException if an I/O error occurred. 069 * @throws XmlPullParserException if an error in the XML parser occurred. 070 */ 071 @Override 072 public JingleContentDescription parse(XmlPullParser parser, 073 int initialDepth, XmlEnvironment xmlEnvironment) throws XmlPullParserException, 074 IOException { 075 boolean done = false; 076 JingleContentDescription desc = getInstance(); 077 078 while (!done) { 079 XmlPullParser.Event eventType = parser.next(); 080 String name = parser.getName(); 081 082 if (eventType == XmlPullParser.Event.START_ELEMENT) { 083 if (name.equals(JingleContentDescription.JinglePayloadType.NODENAME)) { 084 desc.addJinglePayloadType(parsePayload(parser)); 085 } else { 086 // TODO: Should be SmackParseException. 087 throw new IOException("Unknow element \"" + name + "\" in content."); 088 } 089 } else if (eventType == XmlPullParser.Event.END_ELEMENT) { 090 if (name.equals(JingleContentDescription.NODENAME)) { 091 done = true; 092 } 093 } 094 } 095 return desc; 096 } 097 098 /** 099 * Return a new instance of this class. Subclasses must overwrite this 100 * method. 101 * 102 * @return the jingle content description. 103 */ 104 protected abstract JingleContentDescription getInstance(); 105 106 /** 107 * Jingle audio. 108 */ 109 public static class Audio extends JingleContentDescriptionProvider { 110 111 /** 112 * Parse an audio payload type. 113 */ 114 @Override 115 public JinglePayloadType parsePayload(final XmlPullParser parser) { 116 JinglePayloadType pte = super.parsePayload(parser); 117 PayloadType.Audio pt = new PayloadType.Audio(pte.getPayloadType()); 118 int ptClockRate = 0; 119 120 try { 121 ptClockRate = Integer.parseInt(parser.getAttributeValue("", "clockrate")); 122 } catch (Exception e) { 123 } 124 pt.setClockRate(ptClockRate); 125 126 return new JinglePayloadType.Audio(pt); 127 } 128 129 /** 130 * Get a new instance of this object. 131 */ 132 @Override 133 protected JingleContentDescription getInstance() { 134 return new JingleContentDescription.Audio(); 135 } 136 } 137}