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 org.jivesoftware.smack.provider.IQProvider;
021import org.jivesoftware.smack.util.PacketParserUtils;
022import org.jivesoftware.smackx.disco.packet.DiscoverInfo;
023import org.xmlpull.v1.XmlPullParser;
024
025/**
026* The DiscoverInfoProvider parses Service Discovery information packets.
027*
028* @author Gaston Dombiak
029*/
030public class DiscoverInfoProvider extends IQProvider<DiscoverInfo> {
031
032    @Override
033    public DiscoverInfo parse(XmlPullParser parser, int initialDepth)
034                    throws Exception {
035        DiscoverInfo discoverInfo = new DiscoverInfo();
036        boolean done = false;
037        DiscoverInfo.Identity identity = null;
038        String category = "";
039        String identityName = "";
040        String type = "";
041        String variable = "";
042        String lang = "";
043        discoverInfo.setNode(parser.getAttributeValue("", "node"));
044        while (!done) {
045            int eventType = parser.next();
046            if (eventType == XmlPullParser.START_TAG) {
047                final String name = parser.getName();
048                final String namespace = parser.getNamespace();
049                if (namespace.equals(DiscoverInfo.NAMESPACE)) {
050                    switch (name) {
051                    case "identity":
052                        // Initialize the variables from the parsed XML
053                        category = parser.getAttributeValue("", "category");
054                        identityName = parser.getAttributeValue("", "name");
055                        type = parser.getAttributeValue("", "type");
056                        lang = parser.getAttributeValue(parser.getNamespace("xml"), "lang");
057                        break;
058                    case "feature":
059                        // Initialize the variables from the parsed XML
060                        variable = parser.getAttributeValue("", "var");
061                        break;
062                    }
063                }
064                // Otherwise, it must be a packet extension.
065                else {
066                    PacketParserUtils.addExtensionElement(discoverInfo, parser);
067                }
068            } else if (eventType == XmlPullParser.END_TAG) {
069                if (parser.getName().equals("identity")) {
070                    // Create a new identity and add it to the discovered info.
071                    identity = new DiscoverInfo.Identity(category, type, identityName, lang);
072                    discoverInfo.addIdentity(identity);
073                }
074                if (parser.getName().equals("feature")) {
075                    // Create a new feature and add it to the discovered info.
076                    boolean notADuplicateFeature = discoverInfo.addFeature(variable);
077                    assert(notADuplicateFeature);
078                }
079                if (parser.getName().equals("query")) {
080                    done = true;
081                }
082            }
083        }
084
085        return discoverInfo;
086    }
087}