1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 package com.sun.org.apache.bcel.internal.generic; 6 7 /* ==================================================================== 8 * The Apache Software License, Version 1.1 9 * 10 * Copyright (c) 2001 The Apache Software Foundation. All rights 11 * reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 20 * 2. Redistributions in binary form must reproduce the above copyright 21 * notice, this list of conditions and the following disclaimer in 22 * the documentation and/or other materials provided with the 23 * distribution. 24 * 25 * 3. The end-user documentation included with the redistribution, 26 * if any, must include the following acknowledgment: 27 * "This product includes software developed by the 28 * Apache Software Foundation (http://www.apache.org/)." 29 * Alternately, this acknowledgment may appear in the software itself, 30 * if and wherever such third-party acknowledgments normally appear. 31 * 32 * 4. The names "Apache" and "Apache Software Foundation" and 33 * "Apache BCEL" must not be used to endorse or promote products 34 * derived from this software without prior written permission. For 35 * written permission, please contact apache@apache.org. 36 * 37 * 5. Products derived from this software may not be called "Apache", 38 * "Apache BCEL", nor may "Apache" appear in their name, without 39 * prior written permission of the Apache Software Foundation. 40 * 41 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 42 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 43 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 44 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 45 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 46 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 47 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 48 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 49 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 50 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 51 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 52 * SUCH DAMAGE. 53 * ==================================================================== 54 * 55 * This software consists of voluntary contributions made by many 56 * individuals on behalf of the Apache Software Foundation. For more 57 * information on the Apache Software Foundation, please see 58 * <http://www.apache.org/>. 59 */ 60 61 /** 62 * FCONST - Push 0.0, 1.0 or 2.0, other values cause an exception 63 * 64 * <PRE>Stack: ... -> ..., </PRE> 65 * 66 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 67 */ 68 public class FCONST extends Instruction 69 implements ConstantPushInstruction, TypedInstruction { 70 private float value; 71 72 /** 73 * Empty constructor needed for the Class.newInstance() statement in 74 * Instruction.readInstruction(). Not to be used otherwise. 75 */ FCONST()76 FCONST() {} 77 FCONST(float f)78 public FCONST(float f) { 79 super(com.sun.org.apache.bcel.internal.Constants.FCONST_0, (short)1); 80 81 if(f == 0.0) 82 opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_0; 83 else if(f == 1.0) 84 opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_1; 85 else if(f == 2.0) 86 opcode = com.sun.org.apache.bcel.internal.Constants.FCONST_2; 87 else 88 throw new ClassGenException("FCONST can be used only for 0.0, 1.0 and 2.0: " + f); 89 90 value = f; 91 } 92 getValue()93 public Number getValue() { return new Float(value); } 94 95 /** @return Type.FLOAT 96 */ getType(ConstantPoolGen cp)97 public Type getType(ConstantPoolGen cp) { 98 return Type.FLOAT; 99 } 100 101 /** 102 * Call corresponding visitor method(s). The order is: 103 * Call visitor methods of implemented interfaces first, then 104 * call methods according to the class hierarchy in descending order, 105 * i.e., the most specific visitXXX() call comes last. 106 * 107 * @param v Visitor object 108 */ accept(Visitor v)109 public void accept(Visitor v) { 110 v.visitPushInstruction(this); 111 v.visitStackProducer(this); 112 v.visitTypedInstruction(this); 113 v.visitConstantPushInstruction(this); 114 v.visitFCONST(this); 115 } 116 } 117