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Java > Open Source Codes > org > jivesoftware > smackx > provider > RosterExchangeProvider


1 /**
2  * $RCSfile$
3  * $Revision: 2407 $
4  * $Date: 2004-11-02 20:37:00 -0300 (Tue, 02 Nov 2004) $
5  *
6  * Copyright 2003-2004 Jive Software.
7  *
8  * All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
9  * you may not use this file except in compliance with the License.
10  * You may obtain a copy of the License at
11  *
12  * http://www.apache.org/licenses/LICENSE-2.0
13  *
14  * Unless required by applicable law or agreed to in writing, software
15  * distributed under the License is distributed on an "AS IS" BASIS,
16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17  * See the License for the specific language governing permissions and
18  * limitations under the License.
19  */
20
21 package org.jivesoftware.smackx.provider;
22
23 import java.util.ArrayList JavaDoc;
24
25 import org.jivesoftware.smack.packet.PacketExtension;
26 import org.jivesoftware.smack.provider.PacketExtensionProvider;
27 import org.jivesoftware.smackx.*;
28 import org.jivesoftware.smackx.packet.*;
29 import org.xmlpull.v1.XmlPullParser;
30
31 /**
32  *
33  * The RosterExchangeProvider parses RosterExchange packets.
34  *
35  * @author Gaston Dombiak
36  */
37 public class RosterExchangeProvider implements PacketExtensionProvider {
38
39     /**
40      * Creates a new RosterExchangeProvider.
41      * ProviderManager requires that every PacketExtensionProvider has a public, no-argument constructor
42      */
43     public RosterExchangeProvider() {
44     }
45
46     /**
47      * Parses a RosterExchange packet (extension sub-packet).
48      *
49      * @param parser the XML parser, positioned at the starting element of the extension.
50      * @return a PacketExtension.
51      * @throws Exception if a parsing error occurs.
52      */
53     public PacketExtension parseExtension(XmlPullParser parser) throws Exception JavaDoc {
54
55         RosterExchange rosterExchange = new RosterExchange();
56         boolean done = false;
57         RemoteRosterEntry remoteRosterEntry = null;
58         String JavaDoc jid = "";
59         String JavaDoc name = "";
60         ArrayList JavaDoc groupsName = new ArrayList JavaDoc();
61         while (!done) {
62             int eventType = parser.next();
63             if (eventType == XmlPullParser.START_TAG) {
64                 if (parser.getName().equals("item")) {
65                     // Reset this variable since they are optional for each item
66 groupsName = new ArrayList JavaDoc();
67                     // Initialize the variables from the parsed XML
68 jid = parser.getAttributeValue("", "jid");
69                     name = parser.getAttributeValue("", "name");
70                 }
71                 if (parser.getName().equals("group")) {
72                     groupsName.add(parser.nextText());
73                 }
74             } else if (eventType == XmlPullParser.END_TAG) {
75                 if (parser.getName().equals("item")) {
76                     // Create packet.
77 remoteRosterEntry = new RemoteRosterEntry(jid, name, (String JavaDoc[]) groupsName.toArray(new String JavaDoc[groupsName.size()]));
78                     rosterExchange.addRosterEntry(remoteRosterEntry);
79                 }
80                 if (parser.getName().equals("x")) {
81                     done = true;
82                 }
83             }
84         }
85
86         return rosterExchange;
87
88     }
89
90 }
91
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