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. /**
  58. *
  59. * <p>The implementation of the integer divide operator
  60. *
  61. * @author Nathan Abramson - Art Technology Group
  62. * @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: luehe $
  63. **/
  64. public class IntegerDivideOperator
  65. extends BinaryOperator
  66. {
  67. //-------------------------------------
  68. // Singleton
  69. //-------------------------------------
  70. public static final IntegerDivideOperator SINGLETON =
  71. new IntegerDivideOperator ();
  72. //-------------------------------------
  73. /**
  74. *
  75. * Constructor
  76. **/
  77. public IntegerDivideOperator ()
  78. {
  79. }
  80. //-------------------------------------
  81. // Expression methods
  82. //-------------------------------------
  83. /**
  84. *
  85. * Returns the symbol representing the operator
  86. **/
  87. public String getOperatorSymbol ()
  88. {
  89. return "idiv";
  90. }
  91. //-------------------------------------
  92. /**
  93. *
  94. * Applies the operator to the given value
  95. **/
  96. public Object apply (Object pLeft,
  97. Object pRight,
  98. Logger pLogger)
  99. throws ELException
  100. {
  101. if (pLeft == null &&
  102. pRight == null) {
  103. if (pLogger.isLoggingWarning ()) {
  104. pLogger.logWarning
  105. (Constants.ARITH_OP_NULL,
  106. getOperatorSymbol ());
  107. }
  108. return PrimitiveObjects.getInteger (0);
  109. }
  110. long left =
  111. Coercions.coerceToPrimitiveNumber (pLeft, Long.class, pLogger).
  112. longValue ();
  113. long right =
  114. Coercions.coerceToPrimitiveNumber (pRight, Long.class, pLogger).
  115. longValue ();
  116. try {
  117. return PrimitiveObjects.getLong (left / right);
  118. }
  119. catch (Exception exc) {
  120. if (pLogger.isLoggingError ()) {
  121. pLogger.logError
  122. (Constants.ARITH_ERROR,
  123. getOperatorSymbol (),
  124. "" + left,
  125. "" + right);
  126. }
  127. return PrimitiveObjects.getInteger (0);
  128. }
  129. }
  130. //-------------------------------------
  131. }