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 * @LastModified: Nov 2017 36 */ 37 public final class ConstantDouble extends Constant implements ConstantObject { 38 39 private double bytes; 40 41 42 /** 43 * @param bytes Data 44 */ 45 public ConstantDouble(final double bytes) { 46 super(Const.CONSTANT_Double); 47 this.bytes = bytes; 48 } 49 50 51 /** 52 * Initialize from another object. 53 */ 54 public ConstantDouble(final ConstantDouble c) { 55 this(c.getBytes()); 56 } 57 58 59 /** 60 * Initialize instance from file data. 61 * 62 * @param file Input stream 63 * @throws IOException 64 */ 65 ConstantDouble(final DataInput file) throws IOException { 66 this(file.readDouble()); 67 } 68 69 70 /** 71 * Called by objects that are traversing the nodes of the tree implicitely 72 * defined by the contents of a Java class. I.e., the hierarchy of methods, 73 * fields, attributes, etc. spawns a tree of objects. 74 * 75 * @param v Visitor object 76 */ 77 @Override 78 public void accept( final Visitor v ) { 79 v.visitConstantDouble(this); 80 } 81 82 83 /** 84 * Dump constant double to file stream in binary format. 85 * 86 * @param file Output file stream 87 * @throws IOException 88 */ 89 @Override 90 public final void dump( final DataOutputStream file ) throws IOException { 91 file.writeByte(super.getTag()); 92 file.writeDouble(bytes); 93 } 94 95 96 /** 97 * @return data, i.e., 8 bytes. 98 */ 99 public final double getBytes() { 100 return bytes; 101 } 102 103 104 /** 105 * @param bytes the raw bytes that represent the double value 106 */ 107 public final void setBytes( final double bytes ) { 108 this.bytes = bytes; 109 } 110 111 112 /** 113 * @return String representation. 114 */ 115 @Override 116 public final String toString() { 117 return super.toString() + "(bytes = " + bytes + ")"; 118 } 119 120 121 /** @return Double object 122 */ 123 @Override 124 public Object getConstantValue( final ConstantPool cp ) { 125 return bytes; 126 } 127 }