Source code: org/apache/commons/el/LessThanOrEqualsOperator.java
1 /*
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 1999 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution, if
20 * any, must include the following acknowlegement:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowlegement may appear in the software itself,
24 * if and wherever such third-party acknowlegements normally appear.
25 *
26 * 4. The names "The Jakarta Project", "Tomcat", and "Apache Software
27 * Foundation" must not be used to endorse or promote products derived
28 * from this software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache"
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33 * permission of the Apache Group.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
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53 *
54 */
55
56 package org.apache.commons.el;
57
58 import javax.servlet.jsp.el.ELException;
59 import java.math.BigDecimal;
60 import java.math.BigInteger;
61
62 /**
63 *
64 * <p>The implementation of the less than or equals operator
65 *
66 * @author Nathan Abramson - Art Technology Group
67 * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
68 **/
69
70 public class LessThanOrEqualsOperator
71 extends RelationalOperator
72 {
73 //-------------------------------------
74 // Singleton
75 //-------------------------------------
76
77 public static final LessThanOrEqualsOperator SINGLETON =
78 new LessThanOrEqualsOperator ();
79
80 //-------------------------------------
81 /**
82 *
83 * Constructor
84 **/
85 public LessThanOrEqualsOperator ()
86 {
87 }
88
89 //-------------------------------------
90 // Expression methods
91 //-------------------------------------
92 /**
93 *
94 * Returns the symbol representing the operator
95 **/
96 public String getOperatorSymbol ()
97 {
98 return "<=";
99 }
100
101 //-------------------------------------
102 /**
103 *
104 * Applies the operator to the given value
105 **/
106 public Object apply (Object pLeft,
107 Object pRight,
108 Logger pLogger)
109 throws ELException
110 {
111 if (pLeft == pRight) {
112 return Boolean.TRUE;
113 }
114 else if (pLeft == null ||
115 pRight == null) {
116 return Boolean.FALSE;
117 }
118 else {
119 return super.apply (pLeft, pRight, pLogger);
120 }
121 }
122
123 //-------------------------------------
124 /**
125 *
126 * Applies the operator to the given double values
127 **/
128 public boolean apply (double pLeft, double pRight) {
129 return pLeft <= pRight;
130 }
131
132 //-------------------------------------
133 /**
134 *
135 * Applies the operator to the given long values
136 **/
137 public boolean apply (long pLeft, long pRight) {
138 return pLeft <= pRight;
139 }
140
141 //-------------------------------------
142 /**
143 *
144 * Applies the operator to the given String values
145 **/
146 public boolean apply (String pLeft, String pRight) {
147 return pLeft.compareTo (pRight) <= 0;
148 }
149
150 //-------------------------------------
151
152 /**
153 *
154 * Applies the operator to the given BigDecimal values, returning a BigDecimal
155 **/
156 public boolean apply(BigDecimal pLeft, BigDecimal pRight) {
157 return (isLess(pLeft.compareTo(pRight)) || isEqual(pLeft.compareTo(pRight)));
158 }
159
160 //-------------------------------------
161
162 /**
163 *
164 * Applies the operator to the given BigDecimal values, returning a BigDecimal
165 **/
166 public boolean apply(BigInteger pLeft, BigInteger pRight) {
167 return (isLess(pLeft.compareTo(pRight)) || isEqual(pLeft.compareTo(pRight)));
168 }
169
170 //-------------------------------------
171 }