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Java > Open Source Codes > com > sun > org > apache > bcel > internal > classfile > ConstantFloat


1 package com.sun.org.apache.bcel.internal.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 com.sun.org.apache.bcel.internal.Constants;
58 import java.io.*;
59
60 /**
61  * This class is derived from the abstract
62  * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class
63  * and represents a reference to a float object.
64  *
65  * @version $Id: ConstantFloat.java,v 1.1.1.1 2001/10/29 19:59:58 jvanzyl 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    * @throw 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    * @throw 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 JavaDoc toString() {
133     return super.toString() + "(bytes = " + bytes + ")";
134   }
135
136   /** @return Float object
137    */
138   public Object JavaDoc getConstantValue(ConstantPool cp) {
139     return new Float JavaDoc(bytes);
140   }
141 }
142
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