1 package org.apache.bcel.classfile;
2
3 /* ====================================================================
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2001 The Apache Software Foundation. All rights
7 * reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 *
21 * 3. The end-user documentation included with the redistribution,
22 * if any, must include the following acknowledgment:
23 * "This product includes software developed by the
24 * Apache Software Foundation (http://www.apache.org/)."
25 * Alternately, this acknowledgment may appear in the software itself,
26 * if and wherever such third-party acknowledgments normally appear.
27 *
28 * 4. The names "Apache" and "Apache Software Foundation" and
29 * "Apache BCEL" must not be used to endorse or promote products
30 * derived from this software without prior written permission. For
31 * written permission, please contact apache@apache.org.
32 *
33 * 5. Products derived from this software may not be called "Apache",
34 * "Apache BCEL", nor may "Apache" appear in their name, without
35 * prior written permission of the Apache Software Foundation.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 *
51 * This software consists of voluntary contributions made by many
52 * individuals on behalf of the Apache Software Foundation. For more
53 * information on the Apache Software Foundation, please see
54 * <http://www.apache.org/>.
55 */
56
57 import org.apache.bcel.Constants;
58 import java.io.*;
59
60 /***
61 * This class is derived from the abstract
62 * <A HREF="org.apache.bcel.classfile.Constant.html">Constant</A> class
63 * and represents a reference to a float object.
64 *
65 * @version $Id: ConstantFloat.java,v 1.2 2002/03/11 16:16:35 mdahm Exp $
66 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
67 * @see Constant
68 */
69 public final class ConstantFloat extends Constant implements ConstantObject {
70 private float bytes;
71
72 /***
73 * @param bytes Data
74 */
75 public ConstantFloat(float bytes)
76 {
77 super(Constants.CONSTANT_Float);
78 this.bytes = bytes;
79 }
80 /***
81 * Initialize from another object. Note that both objects use the same
82 * references (shallow copy). Use clone() for a physical copy.
83 */
84 public ConstantFloat(ConstantFloat c) {
85 this(c.getBytes());
86 }
87 /***
88 * Initialize instance from file data.
89 *
90 * @param file Input stream
91 * @throws IOException
92 */
93 ConstantFloat(DataInputStream file) throws IOException
94 {
95 this(file.readFloat());
96 }
97 /***
98 * Called by objects that are traversing the nodes of the tree implicitely
99 * defined by the contents of a Java class. I.e., the hierarchy of methods,
100 * fields, attributes, etc. spawns a tree of objects.
101 *
102 * @param v Visitor object
103 */
104 public void accept(Visitor v) {
105 v.visitConstantFloat(this);
106 }
107 /***
108 * Dump constant float to file stream in binary format.
109 *
110 * @param file Output file stream
111 * @throws IOException
112 */
113 public final void dump(DataOutputStream file) throws IOException
114 {
115 file.writeByte(tag);
116 file.writeFloat(bytes);
117 }
118 /***
119 * @return data, i.e., 4 bytes.
120 */
121 public final float getBytes() { return bytes; }
122 /***
123 * @param bytes.
124 */
125 public final void setBytes(float bytes) {
126 this.bytes = bytes;
127 }
128
129 /***
130 * @return String representation.
131 */
132 public final String toString() {
133 return super.toString() + "(bytes = " + bytes + ")";
134 }
135
136 /*** @return Float object
137 */
138 public Object getConstantValue(ConstantPool cp) {
139 return new Float(bytes);
140 }
141 }
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