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