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1 package org.apache.bcel.classfile; 2 3 /* ==================================================================== 4 * The Apache Software License, Version 1.1 5 * 6 * Copyright (c) 2001 The Apache Software Foundation. All rights 7 * reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in 18 * the documentation and/or other materials provided with the 19 * distribution. 20 * 21 * 3. The end-user documentation included with the redistribution, 22 * if any, must include the following acknowledgment: 23 * "This product includes software developed by the 24 * Apache Software Foundation (http://www.apache.org/)." 25 * Alternately, this acknowledgment may appear in the software itself, 26 * if and wherever such third-party acknowledgments normally appear. 27 * 28 * 4. The names "Apache" and "Apache Software Foundation" and 29 * "Apache BCEL" must not be used to endorse or promote products 30 * derived from this software without prior written permission. For 31 * written permission, please contact apache@apache.org. 32 * 33 * 5. Products derived from this software may not be called "Apache", 34 * "Apache BCEL", nor may "Apache" appear in their name, without 35 * prior written permission of the Apache Software Foundation. 36 * 37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED 38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR 41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 48 * SUCH DAMAGE. 49 * ==================================================================== 50 * 51 * This software consists of voluntary contributions made by many 52 * individuals on behalf of the Apache Software Foundation. For more 53 * information on the Apache Software Foundation, please see 54 * <http://www.apache.org/>;. 55 */ 56 57 import org.apache.bcel.Constants; 58 import java.io.*; 59 60 /*** 61 * This class is derived from the abstract 62 * <A HREF="org.apache.bcel.classfile.Constant.html">Constant</A> class 63 * and represents a reference to a Double object. 64 * 65 * @version $Id: ConstantDouble.java,v 1.2 2002/03/11 16:16:35 mdahm Exp $ 66 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 67 * @see Constant 68 */ 69 public final class ConstantDouble extends Constant implements ConstantObject { 70 private double bytes; 71 72 /*** 73 * @param bytes Data 74 */ 75 public ConstantDouble(double bytes) { 76 super(Constants.CONSTANT_Double); 77 this.bytes = bytes; 78 } 79 80 /*** 81 * Initialize from another object. 82 */ 83 public ConstantDouble(ConstantDouble c) { 84 this(c.getBytes()); 85 } 86 87 /*** 88 * Initialize instance from file data. 89 * 90 * @param file Input stream 91 * @throws IOException 92 */ 93 ConstantDouble(DataInputStream file) throws IOException 94 { 95 this(file.readDouble()); 96 } 97 98 /*** 99 * Called by objects that are traversing the nodes of the tree implicitely 100 * defined by the contents of a Java class. I.e., the hierarchy of methods, 101 * fields, attributes, etc. spawns a tree of objects. 102 * 103 * @param v Visitor object 104 */ 105 public void accept(Visitor v) { 106 v.visitConstantDouble(this); 107 } 108 /*** 109 * Dump constant double to file stream in binary format. 110 * 111 * @param file Output file stream 112 * @throws IOException 113 */ 114 public final void dump(DataOutputStream file) throws IOException 115 { 116 file.writeByte(tag); 117 file.writeDouble(bytes); 118 } 119 /*** 120 * @return data, i.e., 8 bytes. 121 */ 122 public final double getBytes() { return bytes; } 123 /*** 124 * @param bytes. 125 */ 126 public final void setBytes(double bytes) { 127 this.bytes = bytes; 128 } 129 /*** 130 * @return String representation. 131 */ 132 public final String toString() 133 { 134 return super.toString() + "(bytes = " + bytes + ")"; 135 } 136 137 /*** @return Double object 138 */ 139 public Object getConstantValue(ConstantPool cp) { 140 return new Double(bytes); 141 } 142 }

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