IQVersionHandler


1   /**
2    * $RCSfile: IQVersionHandler.java,v $
3    * $Revision: 1.12 $
4    * $Date: 2004/12/12 02:30:40 $
5    *
6    * Copyright (C) 2004 Jive Software. All rights reserved.
7    *
8    * This software is published under the terms of the GNU Public License (GPL),
9    * a copy of which is included in this distribution.
10   */
11  
12  package org.jivesoftware.messenger.handler;
13  
14  import org.jivesoftware.messenger.disco.ServerFeaturesProvider;
15  import org.jivesoftware.messenger.IQHandlerInfo;
16  import org.jivesoftware.messenger.PacketException;
17  import org.jivesoftware.admin.AdminConsole;
18  
19  import java.util.ArrayList  ;
20  import java.util.Iterator  ;
21  import org.dom4j.DocumentHelper;
22  import org.dom4j.Element;
23  import org.dom4j.QName;
24  import org.xmpp.packet.IQ;
25  
26  /**
27   * Implements the TYPE_IQ jabber:iq:version protocol (version info). Allows
28   * XMPP entities to query each other's application versions.  The server
29   * will respond with its current version info.
30   *
31   * @author Iain Shigeoka
32   */
33  public class IQVersionHandler extends IQHandler implements ServerFeaturesProvider {
34  
35      private static Element bodyElement;
36      private IQHandlerInfo info;
37  
38      public IQVersionHandler() {
39          super("XMPP Server Version Handler");
40          info = new IQHandlerInfo("query", "jabber:iq:version");
41          if (bodyElement == null) {
42              bodyElement = DocumentHelper.createElement(QName.get("query", "jabber:iq:version"));
43              bodyElement.addElement("name").setText(AdminConsole.getAppName());
44              bodyElement.addElement("os").setText("Java 5");
45              bodyElement.addElement("version");
46          }
47      }
48  
49      public IQ handleIQ(IQ packet) throws PacketException {
50          // Could cache this information for every server we see
51          Element answerElement = bodyElement.createCopy();
52          answerElement.element("name").setText(AdminConsole.getAppName());
53          answerElement.element("version").setText(AdminConsole.getVersionString());
54          IQ result = IQ.createResultIQ(packet);
55          result.setChildElement(answerElement);
56          return result;
57      }
58  
59      public IQHandlerInfo getInfo() {
60          return info;
61      }
62  
63      public Iterator   getFeatures() {
64          ArrayList   features = new ArrayList  ();
65          features.add("jabber:iq:version");
66          return features.iterator();
67      }
68  }
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