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.packet.IQ;
022import org.jivesoftware.smack.packet.IqData;
023import org.jivesoftware.smack.packet.XmlEnvironment;
024import org.jivesoftware.smack.parsing.SmackParsingException;
025import org.jivesoftware.smack.provider.IqProvider;
026import org.jivesoftware.smack.util.PacketParserUtils;
027import org.jivesoftware.smack.xml.XmlPullParser;
028import org.jivesoftware.smack.xml.XmlPullParserException;
029
030import org.jivesoftware.smackx.pubsub.packet.PubSub;
031import org.jivesoftware.smackx.pubsub.packet.PubSubNamespace;
032
033/**
034 * Parses the root PubSub stanza extensions of the {@link IQ} stanza and returns
035 * a {@link PubSub} instance.
036 *
037 * @author Robin Collier
038 */
039public class PubSubProvider extends IqProvider<PubSub> {
040    @Override
041    public PubSub parse(XmlPullParser parser, int initialDepth, IqData iqData, XmlEnvironment xmlEnvironment) throws XmlPullParserException, IOException, SmackParsingException {
042        String namespace = parser.getNamespace();
043        PubSubNamespace pubSubNamespace = PubSubNamespace.valueOfFromXmlns(namespace);
044        PubSub pubsub = new PubSub(pubSubNamespace);
045
046        outerloop: while (true)  {
047            XmlPullParser.Event eventType = parser.next();
048            switch (eventType) {
049            case START_ELEMENT:
050                PacketParserUtils.addExtensionElement(pubsub, parser, xmlEnvironment);
051                break;
052            case END_ELEMENT:
053                if (parser.getDepth() == initialDepth) {
054                    break outerloop;
055                }
056                break;
057            default:
058                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
059                break;
060            }
061        }
062        return pubsub;
063    }
064}