1. /*
  2. * Copyright 2002,2004 The Apache Software Foundation.
  3. *
  4. * Licensed under the Apache License, Version 2.0 (the "License");
  5. * you may not use this file except in compliance with the License.
  6. * You may obtain a copy of the License at
  7. *
  8. * http://www.apache.org/licenses/LICENSE-2.0
  9. *
  10. * Unless required by applicable law or agreed to in writing, software
  11. * distributed under the License is distributed on an "AS IS" BASIS,
  12. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13. * See the License for the specific language governing permissions and
  14. * limitations under the License.
  15. */
  16. package org.apache.commons.jexl.parser;
  17. import org.apache.commons.jexl.JexlContext;
  18. import org.apache.commons.jexl.util.Coercion;
  19. /**
  20. * Multiplication
  21. *
  22. * @author <a href="mailto:geirm@apache.org">Geir Magnusson Jr.</a>
  23. * @version $Id: ASTMulNode.java,v 1.4 2004/02/28 13:45:20 yoavs Exp $
  24. */
  25. public class ASTMulNode extends SimpleNode
  26. {
  27. public ASTMulNode(int id)
  28. {
  29. super(id);
  30. }
  31. public ASTMulNode(Parser p, int id)
  32. {
  33. super(p, id);
  34. }
  35. /** Accept the visitor. **/
  36. public Object jjtAccept(ParserVisitor visitor, Object data)
  37. {
  38. return visitor.visit(this, data);
  39. }
  40. public Object value(JexlContext context)
  41. throws Exception
  42. {
  43. Object left = ((SimpleNode) jjtGetChild(0)).value(context);
  44. Object right = ((SimpleNode) jjtGetChild(1)).value(context);
  45. /*
  46. * the spec says 'and', I think 'or'
  47. */
  48. if (left == null && right == null)
  49. return new Integer(0);
  50. /*
  51. * if anything is float, double or string with ( "." | "E" | "e")
  52. * coerce all to doubles and do it
  53. */
  54. if ( left instanceof Float || left instanceof Double
  55. || right instanceof Float || right instanceof Double
  56. || ( left instanceof String
  57. && ( ((String) left).indexOf(".") != -1 ||
  58. ((String) left).indexOf("e") != -1 ||
  59. ((String) left).indexOf("E") != -1 )
  60. )
  61. || ( right instanceof String
  62. && ( ((String) right).indexOf(".") != -1 ||
  63. ((String) right).indexOf("e") != -1 ||
  64. ((String) right).indexOf("E") != -1 )
  65. )
  66. )
  67. {
  68. Double l = Coercion.coerceDouble(left);
  69. Double r = Coercion.coerceDouble(right);
  70. return new Double( l.doubleValue() * r.doubleValue() );
  71. }
  72. /*
  73. * otherwise to longs with thee!
  74. */
  75. Long l = Coercion.coerceLong(left);
  76. Long r = Coercion.coerceLong(right);
  77. return new Long(l.longValue() * r.longValue());
  78. }
  79. }