001/**
002 *
003 * Copyright the original author or authors
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.pubsub.provider;
018
019import java.io.IOException;
020
021import org.jivesoftware.smack.SmackException;
022import org.jivesoftware.smack.packet.IQ;
023import org.jivesoftware.smack.provider.IQProvider;
024import org.jivesoftware.smack.util.PacketParserUtils;
025import org.jivesoftware.smackx.pubsub.packet.PubSub;
026import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace;
027import org.xmlpull.v1.XmlPullParser;
028import org.xmlpull.v1.XmlPullParserException;
029
030/**
031 * Parses the root pubsub stanza(/packet) extensions of the {@link IQ} stanza(/packet) and returns
032 * a {@link PubSub} instance.
033 * 
034 * @author Robin Collier
035 */
036public class PubSubProvider extends IQProvider<PubSub>
037{
038    @Override
039    public PubSub parse(XmlPullParser parser, int initialDepth)
040                    throws XmlPullParserException, IOException, SmackException {
041        String namespace = parser.getNamespace();
042        PubSubNamespace pubSubNamespace = PubSubNamespace.valueOfFromXmlns(namespace);
043        PubSub pubsub = new PubSub(pubSubNamespace);
044
045        outerloop: while (true) 
046        {
047            int eventType = parser.next();
048            switch (eventType) {
049            case XmlPullParser.START_TAG:
050                PacketParserUtils.addExtensionElement(pubsub, parser);
051                break;
052            case XmlPullParser.END_TAG:
053                if (parser.getDepth() == initialDepth) {
054                    break outerloop;
055                }
056                break;
057            }
058        }
059        return pubsub;
060        }
061}