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"
  32. * nor may "Apache" appear in their names without prior written
  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,
  40. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  41. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  42. * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  43. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  44. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  45. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  46. * SUCH DAMAGE.
  47. * ====================================================================
  48. *
  49. * This software consists of voluntary contributions made by many
  50. * individuals on behalf of the Apache Software Foundation. For more
  51. * information on the Apache Software Foundation, please see
  52. * <http://www.apache.org/>.
  53. *
  54. */
  55. package org.apache.commons.el;
  56. import javax.servlet.jsp.el.ELException;
  57. import java.math.BigDecimal;
  58. import java.math.BigInteger;
  59. /**
  60. *
  61. * <p>The implementation of the less than or equals operator
  62. *
  63. * @author Nathan Abramson - Art Technology Group
  64. * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
  65. **/
  66. public class LessThanOrEqualsOperator
  67. extends RelationalOperator
  68. {
  69. //-------------------------------------
  70. // Singleton
  71. //-------------------------------------
  72. public static final LessThanOrEqualsOperator SINGLETON =
  73. new LessThanOrEqualsOperator ();
  74. //-------------------------------------
  75. /**
  76. *
  77. * Constructor
  78. **/
  79. public LessThanOrEqualsOperator ()
  80. {
  81. }
  82. //-------------------------------------
  83. // Expression methods
  84. //-------------------------------------
  85. /**
  86. *
  87. * Returns the symbol representing the operator
  88. **/
  89. public String getOperatorSymbol ()
  90. {
  91. return "<=";
  92. }
  93. //-------------------------------------
  94. /**
  95. *
  96. * Applies the operator to the given value
  97. **/
  98. public Object apply (Object pLeft,
  99. Object pRight,
  100. Logger pLogger)
  101. throws ELException
  102. {
  103. if (pLeft == pRight) {
  104. return Boolean.TRUE;
  105. }
  106. else if (pLeft == null ||
  107. pRight == null) {
  108. return Boolean.FALSE;
  109. }
  110. else {
  111. return super.apply (pLeft, pRight, pLogger);
  112. }
  113. }
  114. //-------------------------------------
  115. /**
  116. *
  117. * Applies the operator to the given double values
  118. **/
  119. public boolean apply (double pLeft, double pRight) {
  120. return pLeft <= pRight;
  121. }
  122. //-------------------------------------
  123. /**
  124. *
  125. * Applies the operator to the given long values
  126. **/
  127. public boolean apply (long pLeft, long pRight) {
  128. return pLeft <= pRight;
  129. }
  130. //-------------------------------------
  131. /**
  132. *
  133. * Applies the operator to the given String values
  134. **/
  135. public boolean apply (String pLeft, String pRight) {
  136. return pLeft.compareTo (pRight) <= 0;
  137. }
  138. //-------------------------------------
  139. /**
  140. *
  141. * Applies the operator to the given BigDecimal values, returning a BigDecimal
  142. **/
  143. public boolean apply(BigDecimal pLeft, BigDecimal pRight) {
  144. return (isLess(pLeft.compareTo(pRight)) || isEqual(pLeft.compareTo(pRight)));
  145. }
  146. //-------------------------------------
  147. /**
  148. *
  149. * Applies the operator to the given BigDecimal values, returning a BigDecimal
  150. **/
  151. public boolean apply(BigInteger pLeft, BigInteger pRight) {
  152. return (isLess(pLeft.compareTo(pRight)) || isEqual(pLeft.compareTo(pRight)));
  153. }
  154. //-------------------------------------
  155. }