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 */
017
018package org.jivesoftware.smackx.jingleold.provider;
019
020import org.jivesoftware.smack.SmackException;
021import org.jivesoftware.smack.provider.ExtensionElementProvider;
022import org.jivesoftware.smack.provider.IQProvider;
023import org.jivesoftware.smack.util.ParserUtils;
024
025import org.jivesoftware.smackx.jingleold.JingleActionEnum;
026import org.jivesoftware.smackx.jingleold.packet.Jingle;
027import org.jivesoftware.smackx.jingleold.packet.JingleContent;
028import org.jivesoftware.smackx.jingleold.packet.JingleContentInfo;
029import org.jivesoftware.smackx.jingleold.packet.JingleDescription;
030import org.jivesoftware.smackx.jingleold.packet.JingleTransport;
031
032import org.jxmpp.jid.Jid;
033import org.xmlpull.v1.XmlPullParser;
034
035/**
036 * The JingleProvider parses Jingle packets.
037 * 
038 * @author Alvaro Saurin
039 */
040public class JingleProvider extends IQProvider<Jingle> {
041
042    /**
043     * Parse a iq/jingle element.
044     * @throws Exception 
045     */
046    @Override
047    public Jingle parse(XmlPullParser parser, int intialDepth)
048                    throws Exception {
049
050        Jingle jingle = new Jingle();
051        String sid = "";
052        JingleActionEnum action;
053        Jid initiator, responder;
054        boolean done = false;
055        JingleContent currentContent = null;
056
057        // Sub-elements providers
058        JingleContentProvider jcp = new JingleContentProvider();
059        JingleDescriptionProvider jdpAudio = new JingleDescriptionProvider.Audio();
060        JingleTransportProvider jtpRawUdp = new JingleTransportProvider.RawUdp();
061        JingleTransportProvider jtpIce = new JingleTransportProvider.Ice();
062        ExtensionElementProvider<?> jmipAudio = new JingleContentInfoProvider.Audio();
063
064        int eventType;
065        String elementName;
066        String namespace;
067
068        // Get some attributes for the <jingle> element
069        sid = parser.getAttributeValue("", "sid");
070        action = JingleActionEnum.getAction(parser.getAttributeValue("", "action"));
071        initiator = ParserUtils.getJidAttribute(parser, "initiator");
072        responder = ParserUtils.getJidAttribute(parser, "responder");
073
074        jingle.setSid(sid);
075        jingle.setAction(action);
076        jingle.setInitiator(initiator);
077        jingle.setResponder(responder);
078
079        // Start processing sub-elements
080        while (!done) {
081            eventType = parser.next();
082            elementName = parser.getName();
083            namespace = parser.getNamespace();
084
085            if (eventType == XmlPullParser.START_TAG) {
086
087                // Parse some well know subelements, depending on the namespaces
088                // and element names...
089
090                if (elementName.equals(JingleContent.NODENAME)) {
091                    // Add a new <content> element to the jingle
092                    currentContent = jcp.parse(parser);
093                    jingle.addContent(currentContent);
094                } else if (elementName.equals(JingleDescription.NODENAME) && namespace.equals(JingleDescription.Audio.NAMESPACE)) {
095                    // Set the <description> element of the <content>
096                    currentContent.setDescription(jdpAudio.parse(parser));
097                } else if (elementName.equals(JingleTransport.NODENAME)) {
098                    // Add all of the <transport> elements to the <content> of the jingle
099
100                    // Parse the possible transport namespaces
101                    if (namespace.equals(JingleTransport.RawUdp.NAMESPACE)) {
102                        currentContent.addJingleTransport(jtpRawUdp.parse(parser));
103                    } else if (namespace.equals(JingleTransport.Ice.NAMESPACE)) {
104                        currentContent.addJingleTransport(jtpIce.parse(parser));
105                    } else {
106                        throw new SmackException("Unknown transport namespace \"" + namespace + "\" in Jingle packet.");
107                    }
108                } else if (namespace.equals(JingleContentInfo.Audio.NAMESPACE)) {
109                    jingle.setContentInfo((JingleContentInfo) jmipAudio.parse(parser));
110                } else {
111                    throw new SmackException("Unknown combination of namespace \"" + namespace + "\" and element name \""
112                            + elementName + "\" in Jingle packet.");
113                }
114
115            } else if (eventType == XmlPullParser.END_TAG) {
116                if (parser.getName().equals(Jingle.getElementName())) {
117                    done = true;
118                }
119            }
120        }
121
122        return jingle;
123    }
124}