1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.bcel.internal.classfile; 22 23 import java.io.DataInput; 24 import java.io.DataOutputStream; 25 import java.io.IOException; 26 27 import com.sun.org.apache.bcel.internal.Const; 28 29 /** 30 * This class is derived from the abstract {@link Constant} 31 * and represents a reference to a Double object. 32 * 33 * @version $Id: ConstantDouble.java 1747278 2016-06-07 17:28:43Z britter $ 34 * @see Constant 35 */ 36 public final class ConstantDouble extends Constant implements ConstantObject { 37 38 private double bytes; 39 40 41 /** 42 * @param bytes Data 43 */ 44 public ConstantDouble(final double bytes) { 45 super(Const.CONSTANT_Double); 46 this.bytes = bytes; 47 } 48 49 50 /** 51 * Initialize from another object. 52 */ 53 public ConstantDouble(final ConstantDouble c) { 54 this(c.getBytes()); 55 } 56 57 58 /** 59 * Initialize instance from file data. 60 * 61 * @param file Input stream 62 * @throws IOException 63 */ 64 ConstantDouble(final DataInput file) throws IOException { 65 this(file.readDouble()); 66 } 67 68 69 /** 70 * Called by objects that are traversing the nodes of the tree implicitely 71 * defined by the contents of a Java class. I.e., the hierarchy of methods, 72 * fields, attributes, etc. spawns a tree of objects. 73 * 74 * @param v Visitor object 75 */ 76 @Override 77 public void accept( final Visitor v ) { 78 v.visitConstantDouble(this); 79 } 80 81 82 /** 83 * Dump constant double to file stream in binary format. 84 * 85 * @param file Output file stream 86 * @throws IOException 87 */ 88 @Override 89 public final void dump( final DataOutputStream file ) throws IOException { 90 file.writeByte(super.getTag()); 91 file.writeDouble(bytes); 92 } 93 94 95 /** 96 * @return data, i.e., 8 bytes. 97 */ 98 public final double getBytes() { 99 return bytes; 100 } 101 102 103 /** 104 * @param bytes the raw bytes that represent the double value 105 */ 106 public final void setBytes( final double bytes ) { 107 this.bytes = bytes; 108 } 109 110 111 /** 112 * @return String representation. 113 */ 114 @Override 115 public final String toString() { 116 return super.toString() + "(bytes = " + bytes + ")"; 117 } 118 119 120 /** @return Double object 121 */ 122 @Override 123 public Object getConstantValue( final ConstantPool cp ) { 124 return new Double(bytes); 125 } 126 }