001/**
002 *
003 * Copyright 2013 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 org.jivesoftware.smack.packet.Packet;
020import org.jivesoftware.smack.packet.PacketExtension;
021import org.jivesoftware.smack.provider.PacketExtensionProvider;
022import org.jivesoftware.smack.util.PacketParserUtils;
023import org.jivesoftware.smackx.delay.packet.DelayInfo;
024import org.jivesoftware.smackx.forward.Forwarded;
025import org.xmlpull.v1.XmlPullParser;
026
027/**
028 * This class implements the {@link PacketExtensionProvider} to parse
029 * forwarded messages from a packet.  It will return a {@link Forwarded} packet extension.
030 *
031 * @author Georg Lukas
032 */
033public class ForwardedProvider implements PacketExtensionProvider {
034    public PacketExtension parseExtension(XmlPullParser parser) throws Exception {
035        DelayInfo di = null;
036        Packet packet = null;
037
038        boolean done = false;
039        while (!done) {
040            int eventType = parser.next();
041            if (eventType == XmlPullParser.START_TAG) {
042                if (parser.getName().equals("delay"))
043                    di = (DelayInfo)PacketParserUtils.parsePacketExtension(parser.getName(), parser.getNamespace(), parser);
044                else if (parser.getName().equals("message"))
045                    packet = PacketParserUtils.parseMessage(parser);
046                else throw new Exception("Unsupported forwarded packet type: " + parser.getName());
047            }
048            else if (eventType == XmlPullParser.END_TAG && parser.getName().equals(Forwarded.ELEMENT_NAME))
049                done = true;
050        }
051        if (packet == null)
052            throw new Exception("forwarded extension must contain a packet");
053        return new Forwarded(di, packet);
054    }
055}