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Java > Open Source Codes > com > scalagent > kjoram > comm > BrowseReply


1 /*
2  * JORAM: Java(TM) Open Reliable Asynchronous Messaging
3  * Copyright (C) 2001 - ScalAgent Distributed Technologies
4  * Copyright (C) 1996 - 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): Nicolas Tachker (ScalAgent)
23  */
24 package com.scalagent.kjoram.comm;
25
26 import com.scalagent.kjoram.messages.Message;
27
28 import java.util.Vector JavaDoc;
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 {
36   /** The message contained in the queue. */
37   private Message message = null;
38   /** The messages contained in the queue. */
39   private Vector JavaDoc messages = null;
40
41
42   /**
43    * Constructs a <code>BrowseReply</code> instance.
44    *
45    * @param req The <code>BrowseRequest</code> actually replied.
46    */
47   public BrowseReply(BrowseRequest req)
48   {
49     super(req.getClientContext(), req.getRequestId());
50   }
51
52   
53   /** Adds a message to the vector of messages. */
54   public void addMessage(Message msg)
55   {
56     if (message == null && messages == null)
57       message = msg;
58     else {
59       if (messages == null) {
60         messages = new Vector JavaDoc();
61         messages.addElement(message);
62         message = null;
63       }
64       messages.addElement(msg);
65     }
66   }
67
68   /** Returns the messages carried by this reply. */
69   public Vector JavaDoc getMessages()
70   {
71     if (message != null) {
72       Vector JavaDoc vec = new Vector JavaDoc();
73       vec.addElement(message);
74       return vec;
75     }
76     return messages;
77   }
78 }
79
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