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.xroster.provider;
019
020import java.io.IOException;
021import java.util.ArrayList;
022
023import org.jivesoftware.smack.provider.ExtensionElementProvider;
024import org.jivesoftware.smackx.xroster.RemoteRosterEntry;
025import org.jivesoftware.smackx.xroster.packet.RosterExchange;
026import org.xmlpull.v1.XmlPullParser;
027import org.xmlpull.v1.XmlPullParserException;
028
029/**
030 *
031 * The RosterExchangeProvider parses RosterExchange packets.
032 *
033 * @author Gaston Dombiak
034 */
035public class RosterExchangeProvider extends ExtensionElementProvider<RosterExchange> {
036
037    /**
038     * Parses a RosterExchange stanza(/packet) (extension sub-packet).
039     *
040     * @param parser the XML parser, positioned at the starting element of the extension.
041     * @return a PacketExtension.
042     * @throws IOException 
043     * @throws XmlPullParserException 
044     */
045    @Override
046    public RosterExchange parse(XmlPullParser parser, int initialDepth)
047                    throws XmlPullParserException, IOException {
048
049        RosterExchange rosterExchange = new RosterExchange();
050        boolean done = false;
051        RemoteRosterEntry remoteRosterEntry = null;
052                String jid = "";
053                String name = "";
054                ArrayList<String> groupsName = new ArrayList<String>();
055        while (!done) {
056            int eventType = parser.next();
057            if (eventType == XmlPullParser.START_TAG) {
058                if (parser.getName().equals("item")) {
059                        // Reset this variable since they are optional for each item
060                                        groupsName = new ArrayList<String>();
061                                        // Initialize the variables from the parsed XML
062                    jid = parser.getAttributeValue("", "jid");
063                    name = parser.getAttributeValue("", "name");
064                }
065                if (parser.getName().equals("group")) {
066                                        groupsName.add(parser.nextText());
067                }
068            } else if (eventType == XmlPullParser.END_TAG) {
069                if (parser.getName().equals("item")) {
070                                        // Create packet.
071                                        remoteRosterEntry = new RemoteRosterEntry(jid, name, (String[]) groupsName.toArray(new String[groupsName.size()]));
072                    rosterExchange.addRosterEntry(remoteRosterEntry);
073                }
074                if (parser.getName().equals("x")) {
075                    done = true;
076                }
077            }
078        }
079
080        return rosterExchange;
081
082    }
083
084}