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
033import org.jxmpp.JxmppContext;
034
035/**
036 * Parses the root PubSub stanza extensions of the {@link IQ} stanza and returns
037 * a {@link PubSub} instance.
038 *
039 * @author Robin Collier
040 */
041public class PubSubProvider extends IqProvider<PubSub> {
042    @Override
043    public PubSub parse(XmlPullParser parser, int initialDepth, IqData iqData, XmlEnvironment xmlEnvironment,
044                    JxmppContext jxmppContext) throws XmlPullParserException, IOException, SmackParsingException {
045        String namespace = parser.getNamespace();
046        PubSubNamespace pubSubNamespace = PubSubNamespace.valueOfFromXmlns(namespace);
047        PubSub pubsub = new PubSub(pubSubNamespace);
048
049        outerloop: while (true)  {
050            XmlPullParser.Event eventType = parser.next();
051            switch (eventType) {
052            case START_ELEMENT:
053                PacketParserUtils.addExtensionElement(pubsub, parser, xmlEnvironment, jxmppContext);
054                break;
055            case END_ELEMENT:
056                if (parser.getDepth() == initialDepth) {
057                    break outerloop;
058                }
059                break;
060            default:
061                // Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
062                break;
063            }
064        }
065        return pubsub;
066    }
067}