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. * FCONST - Push 0.0, 1.0 or 2.0, other values cause an exception
  57. *
  58. * <PRE>Stack: ... -> ..., <i></PRE>
  59. *
  60. * @version $Id: FCONST.java,v 1.1.1.1 2001/10/29 20:00:11 jvanzyl Exp $
  61. * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
  62. */
  63. public class FCONST extends Instruction
  64. implements ConstantPushInstruction, TypedInstruction {
  65. private float value;
  66. /**
  67. * Empty constructor needed for the Class.newInstance() statement in
  68. * Instruction.readInstruction(). Not to be used otherwise.
  69. */
  70. FCONST() {}
  71. public FCONST(float f) {
  72. super(com.sun.org.apache.bcel.internal.Constants.FCONST_0, (short)1);
  73. if(f == 0.0)
  74. opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_0;
  75. else if(f == 1.0)
  76. opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_1;
  77. else if(f == 2.0)
  78. opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_2;
  79. else
  80. throw new ClassGenException("FCONST can be used only for 0.0, 1.0 and 2.0: " + f);
  81. value = f;
  82. }
  83. public Number getValue() { return new Float(value); }
  84. /** @return Type.FLOAT
  85. */
  86. public Type getType(ConstantPoolGen cp) {
  87. return Type.FLOAT;
  88. }
  89. /**
  90. * Call corresponding visitor method(s). The order is:
  91. * Call visitor methods of implemented interfaces first, then
  92. * call methods according to the class hierarchy in descending order,
  93. * i.e., the most specific visitXXX() call comes last.
  94. *
  95. * @param v Visitor object
  96. */
  97. public void accept(Visitor v) {
  98. v.visitPushInstruction(this);
  99. v.visitStackProducer(this);
  100. v.visitTypedInstruction(this);
  101. v.visitConstantPushInstruction(this);
  102. v.visitFCONST(this);
  103. }
  104. }