001/**
002 *
003 * Copyright 2003-2007 Jive Software.
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 */
017
018package org.jivesoftware.smackx.disco.provider;
019
020import java.io.IOException;
021
022import org.jivesoftware.smack.SmackException;
023import org.jivesoftware.smack.provider.IQProvider;
024import org.jivesoftware.smack.util.PacketParserUtils;
025import org.jivesoftware.smackx.disco.packet.DiscoverInfo;
026import org.xmlpull.v1.XmlPullParser;
027import org.xmlpull.v1.XmlPullParserException;
028
029/**
030* The DiscoverInfoProvider parses Service Discovery information packets.
031*
032* @author Gaston Dombiak
033*/
034public class DiscoverInfoProvider extends IQProvider<DiscoverInfo> {
035
036    @Override
037    public DiscoverInfo parse(XmlPullParser parser, int initialDepth)
038                    throws XmlPullParserException, IOException, SmackException {
039        DiscoverInfo discoverInfo = new DiscoverInfo();
040        boolean done = false;
041        DiscoverInfo.Identity identity = null;
042        String category = "";
043        String name = "";
044        String type = "";
045        String variable = "";
046        String lang = "";
047        discoverInfo.setNode(parser.getAttributeValue("", "node"));
048        while (!done) {
049            int eventType = parser.next();
050            if (eventType == XmlPullParser.START_TAG) {
051                if (parser.getName().equals("identity")) {
052                    // Initialize the variables from the parsed XML
053                    category = parser.getAttributeValue("", "category");
054                    name = parser.getAttributeValue("", "name");
055                    type = parser.getAttributeValue("", "type");
056                    lang = parser.getAttributeValue(parser.getNamespace("xml"), "lang");
057                }
058                else if (parser.getName().equals("feature")) {
059                    // Initialize the variables from the parsed XML
060                    variable = parser.getAttributeValue("", "var");
061                }
062                // Otherwise, it must be a packet extension.
063                else {
064                    PacketParserUtils.addExtensionElement(discoverInfo, parser);
065                }
066            } else if (eventType == XmlPullParser.END_TAG) {
067                if (parser.getName().equals("identity")) {
068                    // Create a new identity and add it to the discovered info.
069                    identity = new DiscoverInfo.Identity(category, type, name, lang);
070                    discoverInfo.addIdentity(identity);
071                }
072                if (parser.getName().equals("feature")) {
073                    // Create a new feature and add it to the discovered info.
074                    boolean notADuplicateFeature = discoverInfo.addFeature(variable);
075                    assert(notADuplicateFeature);
076                }
077                if (parser.getName().equals("query")) {
078                    done = true;
079                }
080            }
081        }
082
083        return discoverInfo;
084    }
085}