001/**
002 *
003 * Copyright 2013-2014 Georg Lukas
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.forward.provider;
018
019import java.util.logging.Logger;
020
021import org.jivesoftware.smack.SmackException;
022import org.jivesoftware.smack.packet.Message;
023import org.jivesoftware.smack.packet.Stanza;
024import org.jivesoftware.smack.provider.ExtensionElementProvider;
025import org.jivesoftware.smack.util.PacketParserUtils;
026
027import org.jivesoftware.smackx.delay.packet.DelayInformation;
028import org.jivesoftware.smackx.delay.provider.DelayInformationProvider;
029import org.jivesoftware.smackx.forward.packet.Forwarded;
030
031import org.xmlpull.v1.XmlPullParser;
032
033/**
034 * This class implements the {@link ExtensionElementProvider} to parse
035 * forwarded messages from a packet.  It will return a {@link Forwarded} stanza extension.
036 *
037 * @author Georg Lukas
038 */
039public class ForwardedProvider extends ExtensionElementProvider<Forwarded> {
040
041    public static final ForwardedProvider INSTANCE = new ForwardedProvider();
042
043    private static final Logger LOGGER = Logger.getLogger(ForwardedProvider.class.getName());
044
045    @Override
046    public Forwarded parse(XmlPullParser parser, int initialDepth) throws Exception {
047        DelayInformation di = null;
048        Stanza packet = null;
049
050        outerloop: while (true) {
051            int eventType = parser.next();
052            switch (eventType) {
053            case XmlPullParser.START_TAG:
054                String name = parser.getName();
055                String namespace = parser.getNamespace();
056                switch (name) {
057                case DelayInformation.ELEMENT:
058                    if (DelayInformation.NAMESPACE.equals(namespace)) {
059                        di = DelayInformationProvider.INSTANCE.parse(parser, parser.getDepth());
060                    } else {
061                        LOGGER.warning("Namespace '" + namespace + "' does not match expected namespace '"
062                                        + DelayInformation.NAMESPACE + "'");
063                    }
064                    break;
065                case Message.ELEMENT:
066                    packet = PacketParserUtils.parseMessage(parser);
067                    break;
068                default:
069                    LOGGER.warning("Unsupported forwarded packet type: " + name);
070                }
071                break;
072            case XmlPullParser.END_TAG:
073                if (parser.getDepth() == initialDepth) {
074                    break outerloop;
075                }
076                break;
077            }
078        }
079
080        if (packet == null)
081            throw new SmackException("forwarded extension must contain a packet");
082        return new Forwarded(di, packet);
083    }
084}