BrowseReply


1   /*
2    * JORAM: Java(TM) Open Reliable Asynchronous Messaging
3    * Copyright (C) 2001 - 2006 ScalAgent Distributed Technologies
4    * Copyright (C) 1996 - 2000 Dyade
5    *
6    * This library is free software; you can redistribute it and/or
7    * modify it under the terms of the GNU Lesser General Public
8    * License as published by the Free Software Foundation; either
9    * version 2.1 of the License, or any later version.
10   * 
11   * This library is distributed in the hope that it will be useful,
12   * but WITHOUT ANY WARRANTY; without even the implied warranty of
13   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   * Lesser General Public License for more details.
15   * 
16   * You should have received a copy of the GNU Lesser General Public
17   * License along with this library; if not, write to the Free Software
18   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
19   * USA.
20   *
21   * Initial developer(s): Frederic Maistre (INRIA)
22   * Contributor(s): ScalAgent Distributed Technologies
23   */
24  package org.objectweb.joram.mom.notifications;
25  
26  import org.objectweb.joram.shared.messages.Message;
27  
28  import java.util.Vector  ;
29  
30  /**
31   * A <code>BrowseReply</code> instance is used by a queue for replying
32   * to a client <code>BrowseRequest</code> by sending a vector of its messages.
33   */
34  public class BrowseReply extends AbstractReply {
35    /** The message contained in the queue. */
36    private Message message = null;
37    /** The messages contained in the queue. */
38    private Vector   messages = null;
39  
40    /**
41     * Constructs a <code>BrowseReply</code> instance.
42     *
43     * @param req  The <code>BrowseRequest</code> actually replied.
44     */
45    public BrowseReply(BrowseRequest req) {
46      super(req.getClientContext(), req.getRequestId());
47    }
48  
49    
50    /** Adds a message. */
51    public void addMessage(Message msg) {
52      if (message == null && messages == null)
53        message = msg;
54      else {
55        if (messages == null) {
56          messages = new Vector  ();
57          messages.add(message);
58          message = null;
59        }
60        messages.add(msg);
61      }
62    }
63  
64    /** Returns the messages carried by this reply. */
65    public Vector   getMessages() {
66      if (message != null) {
67        Vector   vec = new Vector  ();
68        vec.add(message);
69        return vec;
70      }
71      return messages;
72    }
73  } 
74
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