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Java > Open Source Codes > com > caucho > jms > selector > BooleanLiteralSelector


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  * Free SoftwareFoundation, Inc.
23  * 59 Temple Place, Suite 330
24  * Boston, MA 02111-1307 USA
25  *
26  * @author Scott Ferguson
27  */
28
29 package com.caucho.jms.selector;
30
31 import javax.jms.JMSException JavaDoc;
32 import javax.jms.Message JavaDoc;
33
34 /**
35  * The base selector.
36  */
37 public class BooleanLiteralSelector extends Selector {
38   private Boolean JavaDoc _value;
39
40   BooleanLiteralSelector(boolean value)
41   {
42     _value = value ? Boolean.TRUE : Boolean.FALSE;
43   }
44
45   /**
46    * Evaluate the message. The boolean literal selector returns
47    * the value of the boolean.
48    */
49   Object JavaDoc evaluate(Message JavaDoc message)
50     throws JMSException JavaDoc
51   {
52     return _value;
53   }
54
55   /**
56    * Returns true since the value is a boolean.
57    */
58   boolean isBoolean()
59   {
60     return true;
61   }
62
63   /**
64    * Returns false, since the type is known.
65    */
66   boolean isUnknown()
67   {
68     return false;
69   }
70
71   public String JavaDoc toString()
72   {
73     return String.valueOf(_value);
74   }
75 }
76
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