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Java > Open Source Codes > com > caucho > jmx > query > BetweenExp


1 /*
2  * Copyright (c) 1998-2003 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.jmx.query;
30
31 import javax.management.*;
32
33 /**
34  * Implementation of a less-than query
35  */
36 public class BetweenExp extends AbstractExp implements QueryExp {
37   private ValueExp _test;
38   private ValueExp _v1;
39   private ValueExp _v2;
40
41   /**
42    * Creates a new equal query.
43    */
44   public BetweenExp(ValueExp test, ValueExp v1, ValueExp v2)
45   {
46     _test = test;
47     _v1 = v1;
48     _v2 = v2;
49   }
50
51   /**
52    * Evaluates the expression to a boolean.
53    *
54    * @param name the object to test.
55    *
56    * @return true if the query is a match.
57    */
58   public boolean apply(ObjectName name)
59     throws BadStringOperationException, BadBinaryOpValueExpException,
60        BadAttributeValueExpException, InvalidApplicationException
61   {
62     ValueExp test = _test.apply(name);
63     ValueExp v1 = _v1.apply(name);
64     ValueExp v2 = _v2.apply(name);
65
66     return ! (lt(test, v1) || lt(v2, test));
67   }
68   
69   /**
70    * Returns the expression for the query.
71    */
72   public String toString()
73   {
74     return "between(" + _test + ", " + _v1 + ", " + _v2 + ")";
75   }
76 }
77
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