1 /* 2 * reserved comment block 3 * DO NOT REMOVE OR ALTER! 4 */ 5 /* 6 * Licensed to the Apache Software Foundation (ASF) under one or more 7 * contributor license agreements. See the NOTICE file distributed with 8 * this work for additional information regarding copyright ownership. 9 * The ASF licenses this file to You under the Apache License, Version 2.0 10 * (the "License"); you may not use this file except in compliance with 11 * the License. You may obtain a copy of the License at 12 * 13 * http://www.apache.org/licenses/LICENSE-2.0 14 * 15 * Unless required by applicable law or agreed to in writing, software 16 * distributed under the License is distributed on an "AS IS" BASIS, 17 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 18 * See the License for the specific language governing permissions and 19 * limitations under the License. 20 */ 21 22 package com.sun.org.apache.bcel.internal.classfile; 23 24 25 import com.sun.org.apache.bcel.internal.Constants; 26 import java.io.*; 27 28 /** 29 * This class is derived from the abstract 30 * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class 31 * and represents a reference to a Double object. 32 * 33 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 34 * @see Constant 35 */ 36 public final class ConstantDouble extends Constant implements ConstantObject { 37 private double bytes; 38 39 /** 40 * @param bytes Data 41 */ 42 public ConstantDouble(double bytes) { 43 super(Constants.CONSTANT_Double); 44 this.bytes = bytes; 45 } 46 47 /** 48 * Initialize from another object. 49 */ 50 public ConstantDouble(ConstantDouble c) { 51 this(c.getBytes()); 52 } 53 54 /** 55 * Initialize instance from file data. 56 * 57 * @param file Input stream 58 * @throws IOException 59 */ 60 ConstantDouble(DataInputStream file) throws IOException 61 { 62 this(file.readDouble()); 63 } 64 65 /** 66 * Called by objects that are traversing the nodes of the tree implicitely 67 * defined by the contents of a Java class. I.e., the hierarchy of methods, 68 * fields, attributes, etc. spawns a tree of objects. 69 * 70 * @param v Visitor object 71 */ 72 public void accept(Visitor v) { 73 v.visitConstantDouble(this); 74 } 75 /** 76 * Dump constant double to file stream in binary format. 77 * 78 * @param file Output file stream 79 * @throws IOException 80 */ 81 public final void dump(DataOutputStream file) throws IOException 82 { 83 file.writeByte(tag); 84 file.writeDouble(bytes); 85 } 86 /** 87 * @return data, i.e., 8 bytes. 88 */ 89 public final double getBytes() { return bytes; } 90 /** 91 * @param bytes. 92 */ 93 public final void setBytes(double bytes) { 94 this.bytes = bytes; 95 } 96 /** 97 * @return String representation. 98 */ 99 public final String toString() 100 { 101 return super.toString() + "(bytes = " + bytes + ")"; 102 } 103 104 /** @return Double object 105 */ 106 public Object getConstantValue(ConstantPool cp) { 107 return new Double(bytes); 108 } 109 }