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 java.io.IOException;
021
022import org.jivesoftware.smack.packet.XmlEnvironment;
023import org.jivesoftware.smack.parsing.SmackParsingException;
024import org.jivesoftware.smack.provider.ExtensionElementProvider;
025import org.jivesoftware.smack.provider.IQProvider;
026import org.jivesoftware.smack.util.ParserUtils;
027import org.jivesoftware.smack.xml.XmlPullParser;
028import org.jivesoftware.smack.xml.XmlPullParserException;
029
030import org.jivesoftware.smackx.jingleold.JingleActionEnum;
031import org.jivesoftware.smackx.jingleold.packet.Jingle;
032import org.jivesoftware.smackx.jingleold.packet.JingleContent;
033import org.jivesoftware.smackx.jingleold.packet.JingleContentInfo;
034import org.jivesoftware.smackx.jingleold.packet.JingleDescription;
035import org.jivesoftware.smackx.jingleold.packet.JingleTransport;
036
037import org.jxmpp.jid.Jid;
038
039/**
040 * The JingleProvider parses Jingle packets.
041 *
042 * @author Alvaro Saurin
043 */
044public class JingleProvider extends IQProvider<Jingle> {
045
046    /**
047     * Parse a iq/jingle element.
048     * @throws XmlPullParserException if an error in the XML parser occurred.
049     * @throws IOException if an I/O error occurred.
050     * @throws SmackParsingException if the Smack parser (provider) encountered invalid input.
051     */
052    @Override
053    public Jingle parse(XmlPullParser parser, int intialDepth, XmlEnvironment xmlEnvironment) throws IOException, XmlPullParserException, SmackParsingException {
054
055        Jingle jingle = new Jingle();
056        String sid;
057        JingleActionEnum action;
058        Jid initiator, responder;
059        boolean done = false;
060        JingleContent currentContent = null;
061
062        // Sub-elements providers
063        JingleContentProvider jcp = new JingleContentProvider();
064        JingleDescriptionProvider jdpAudio = new JingleDescriptionProvider.Audio();
065        JingleTransportProvider jtpRawUdp = new JingleTransportProvider.RawUdp();
066        JingleTransportProvider jtpIce = new JingleTransportProvider.Ice();
067        ExtensionElementProvider<?> jmipAudio = new JingleContentInfoProvider.Audio();
068
069        XmlPullParser.Event eventType;
070        String elementName;
071        String namespace;
072
073        // Get some attributes for the <jingle> element
074        sid = parser.getAttributeValue("", "sid");
075        action = JingleActionEnum.getAction(parser.getAttributeValue("", "action"));
076        initiator = ParserUtils.getJidAttribute(parser, "initiator");
077        responder = ParserUtils.getJidAttribute(parser, "responder");
078
079        jingle.setSid(sid);
080        jingle.setAction(action);
081        jingle.setInitiator(initiator);
082        jingle.setResponder(responder);
083
084        // Start processing sub-elements
085        while (!done) {
086            eventType = parser.next();
087
088            if (eventType == XmlPullParser.Event.START_ELEMENT) {
089                elementName = parser.getName();
090                namespace = parser.getNamespace();
091
092                // Parse some well know subelements, depending on the namespaces
093                // and element names...
094
095                if (elementName.equals(JingleContent.NODENAME)) {
096                    // Add a new <content> element to the jingle
097                    currentContent = jcp.parse(parser);
098                    jingle.addContent(currentContent);
099                } else if (elementName.equals(JingleDescription.NODENAME) && namespace.equals(JingleDescription.Audio.NAMESPACE)) {
100                    // Set the <description> element of the <content>
101                    currentContent.setDescription(jdpAudio.parse(parser));
102                } else if (elementName.equals(JingleTransport.NODENAME)) {
103                    // Add all of the <transport> elements to the <content> of the jingle
104
105                    // Parse the possible transport namespaces
106                    if (namespace.equals(JingleTransport.RawUdp.NAMESPACE)) {
107                        currentContent.addJingleTransport(jtpRawUdp.parse(parser));
108                    } else if (namespace.equals(JingleTransport.Ice.NAMESPACE)) {
109                        currentContent.addJingleTransport(jtpIce.parse(parser));
110                    } else {
111                        // TODO: Should be SmackParseException.
112                        throw new IOException("Unknown transport namespace \"" + namespace + "\" in Jingle packet.");
113                    }
114                } else if (namespace.equals(JingleContentInfo.Audio.NAMESPACE)) {
115                    jingle.setContentInfo((JingleContentInfo) jmipAudio.parse(parser));
116                } else {
117                    // TODO: Should be SmackParseException.
118                    throw new IOException("Unknown combination of namespace \"" + namespace + "\" and element name \""
119                            + elementName + "\" in Jingle packet.");
120                }
121
122            } else if (eventType == XmlPullParser.Event.END_ELEMENT) {
123                if (parser.getName().equals(Jingle.NODENAME)) {
124                    done = true;
125                }
126            }
127        }
128
129        return jingle;
130    }
131}