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