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 float object. 32 * 33 * @version $Id: ConstantFloat.java 1747278 2016-06-07 17:28:43Z britter $ 34 * @see Constant 35 * @LastModified: Nov 2017 36 */ 37 public final class ConstantFloat extends Constant implements ConstantObject { 38 39 private float bytes; 40 41 42 /** 43 * @param bytes Data 44 */ 45 public ConstantFloat(final float bytes) { 46 super(Const.CONSTANT_Float); 47 this.bytes = bytes; 48 } 49 50 51 /** 52 * Initialize from another object. Note that both objects use the same 53 * references (shallow copy). Use clone() for a physical copy. 54 */ 55 public ConstantFloat(final ConstantFloat c) { 56 this(c.getBytes()); 57 } 58 59 60 /** 61 * Initialize instance from file data. 62 * 63 * @param file Input stream 64 * @throws IOException 65 */ 66 ConstantFloat(final DataInput file) throws IOException { 67 this(file.readFloat()); 68 } 69 70 71 /** 72 * Called by objects that are traversing the nodes of the tree implicitely 73 * defined by the contents of a Java class. I.e., the hierarchy of methods, 74 * fields, attributes, etc. spawns a tree of objects. 75 * 76 * @param v Visitor object 77 */ 78 @Override 79 public void accept( final Visitor v ) { 80 v.visitConstantFloat(this); 81 } 82 83 84 /** 85 * Dump constant float to file stream in binary format. 86 * 87 * @param file Output file stream 88 * @throws IOException 89 */ 90 @Override 91 public final void dump( final DataOutputStream file ) throws IOException { 92 file.writeByte(super.getTag()); 93 file.writeFloat(bytes); 94 } 95 96 97 /** 98 * @return data, i.e., 4 bytes. 99 */ 100 public final float getBytes() { 101 return bytes; 102 } 103 104 105 /** 106 * @param bytes the raw bytes that represent this float 107 */ 108 public final void setBytes( final float bytes ) { 109 this.bytes = bytes; 110 } 111 112 113 /** 114 * @return String representation. 115 */ 116 @Override 117 public final String toString() { 118 return super.toString() + "(bytes = " + bytes + ")"; 119 } 120 121 122 /** @return Float object 123 */ 124 @Override 125 public Object getConstantValue( final ConstantPool cp ) { 126 return bytes; 127 } 128 }