1. package com.sun.org.apache.bcel.internal.generic;
  2. /* ====================================================================
  3. * The Apache Software License, Version 1.1
  4. *
  5. * Copyright (c) 2001 The Apache Software Foundation. All rights
  6. * reserved.
  7. *
  8. * Redistribution and use in source and binary forms, with or without
  9. * modification, are permitted provided that the following conditions
  10. * are met:
  11. *
  12. * 1. Redistributions of source code must retain the above copyright
  13. * notice, this list of conditions and the following disclaimer.
  14. *
  15. * 2. Redistributions in binary form must reproduce the above copyright
  16. * notice, this list of conditions and the following disclaimer in
  17. * the documentation and/or other materials provided with the
  18. * distribution.
  19. *
  20. * 3. The end-user documentation included with the redistribution,
  21. * if any, must include the following acknowledgment:
  22. * "This product includes software developed by the
  23. * Apache Software Foundation (http://www.apache.org/)."
  24. * Alternately, this acknowledgment may appear in the software itself,
  25. * if and wherever such third-party acknowledgments normally appear.
  26. *
  27. * 4. The names "Apache" and "Apache Software Foundation" and
  28. * "Apache BCEL" must not be used to endorse or promote products
  29. * derived from this software without prior written permission. For
  30. * written permission, please contact apache@apache.org.
  31. *
  32. * 5. Products derived from this software may not be called "Apache",
  33. * "Apache BCEL", nor may "Apache" appear in their name, without
  34. * prior written permission of the Apache Software Foundation.
  35. *
  36. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
  37. * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  38. * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  39. * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
  40. * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  41. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  42. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  43. * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  44. * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  45. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  46. * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  47. * SUCH DAMAGE.
  48. * ====================================================================
  49. *
  50. * This software consists of voluntary contributions made by many
  51. * individuals on behalf of the Apache Software Foundation. For more
  52. * information on the Apache Software Foundation, please see
  53. * <http://www.apache.org/>.
  54. */
  55. /**
  56. * LDC2_W - Push long or double from constant pool
  57. *
  58. * <PRE>Stack: ... -> ..., item.word1, item.word2</PRE>
  59. *
  60. * @version $Id: LDC2_W.java,v 1.1.1.1 2001/10/29 20:00:21 jvanzyl Exp $
  61. * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  62. */
  63. public class LDC2_W extends CPInstruction
  64. implements PushInstruction, TypedInstruction {
  65. /**
  66. * Empty constructor needed for the Class.newInstance() statement in
  67. * Instruction.readInstruction(). Not to be used otherwise.
  68. */
  69. LDC2_W() {}
  70. public LDC2_W(int index) {
  71. super(com.sun.org.apache.bcel.internal.Constants.LDC2_W, index);
  72. }
  73. public Type getType(ConstantPoolGen cpg) {
  74. switch(cpg.getConstantPool().getConstant(index).getTag()) {
  75. case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Long: return Type.LONG;
  76. case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Double: return Type.DOUBLE;
  77. default: // Never reached
  78. throw new RuntimeException("Unknown constant type " + opcode);
  79. }
  80. }
  81. public Number getValue(ConstantPoolGen cpg) {
  82. com.sun.org.apache.bcel.internal.classfile.Constant c = cpg.getConstantPool().getConstant(index);
  83. switch(c.getTag()) {
  84. case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Long:
  85. return new Long(((com.sun.org.apache.bcel.internal.classfile.ConstantLong)c).getBytes());
  86. case com.sun.org.apache.bcel.internal.Constants.CONSTANT_Double:
  87. return new Double(((com.sun.org.apache.bcel.internal.classfile.ConstantDouble)c).getBytes());
  88. default: // Never reached
  89. throw new RuntimeException("Unknown or invalid constant type at " + index);
  90. }
  91. }
  92. /**
  93. * Call corresponding visitor method(s). The order is:
  94. * Call visitor methods of implemented interfaces first, then
  95. * call methods according to the class hierarchy in descending order,
  96. * i.e., the most specific visitXXX() call comes last.
  97. *
  98. * @param v Visitor object
  99. */
  100. public void accept(Visitor v) {
  101. v.visitStackProducer(this);
  102. v.visitPushInstruction(this);
  103. v.visitTypedInstruction(this);
  104. v.visitCPInstruction(this);
  105. v.visitLDC2_W(this);
  106. }
  107. }