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1   /*
2    * reserved comment block
3    * DO NOT REMOVE OR ALTER!
4    */
5   package com.sun.org.apache.bcel.internal.classfile;
6   
7   /* ====================================================================
8    * The Apache Software License, Version 1.1
9    *
10   * Copyright (c) 2001 The Apache Software Foundation.  All rights
11   * reserved.
12   *
13   * Redistribution and use in source and binary forms, with or without
14   * modification, are permitted provided that the following conditions
15   * are met:
16   *
17   * 1. Redistributions of source code must retain the above copyright
18   *    notice, this list of conditions and the following disclaimer.
19   *
20   * 2. Redistributions in binary form must reproduce the above copyright
21   *    notice, this list of conditions and the following disclaimer in
22   *    the documentation and/or other materials provided with the
23   *    distribution.
24   *
25   * 3. The end-user documentation included with the redistribution,
26   *    if any, must include the following acknowledgment:
27   *       "This product includes software developed by the
28   *        Apache Software Foundation (http://www.apache.org/)."
29   *    Alternately, this acknowledgment may appear in the software itself,
30   *    if and wherever such third-party acknowledgments normally appear.
31   *
32   * 4. The names "Apache" and "Apache Software Foundation" and
33   *    "Apache BCEL" must not be used to endorse or promote products
34   *    derived from this software without prior written permission. For
35   *    written permission, please contact apache@apache.org.
36   *
37   * 5. Products derived from this software may not be called "Apache",
38   *    "Apache BCEL", nor may "Apache" appear in their name, without
39   *    prior written permission of the Apache Software Foundation.
40   *
41   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
42   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
43   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
44   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
45   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
46   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
47   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
48   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
49   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
50   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
51   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52   * SUCH DAMAGE.
53   * ====================================================================
54   *
55   * This software consists of voluntary contributions made by many
56   * individuals on behalf of the Apache Software Foundation.  For more
57   * information on the Apache Software Foundation, please see
58   * <http://www.apache.org/>.
59   */
60  
61  import com.sun.org.apache.bcel.internal.Constants;
62  import java.io.*;
63  
64  /**
65   * This class is derived from the abstract
66   * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class
67   * and represents a reference to a float object.
68   *
69   * @author  <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
70   * @see     Constant
71   */
72  public final class ConstantFloat extends Constant implements ConstantObject {
73    private float bytes;
74  
75    /**
76     * @param bytes Data
77     */
78    public ConstantFloat(float bytes)
79    {
80      super(Constants.CONSTANT_Float);
81      this.bytes = bytes;
82    }
83    /**
84     * Initialize from another object. Note that both objects use the same
85     * references (shallow copy). Use clone() for a physical copy.
86     */
87    public ConstantFloat(ConstantFloat c) {
88      this(c.getBytes());
89    }
90    /**
91     * Initialize instance from file data.
92     *
93     * @param file Input stream
94     * @throws IOException
95     */
96    ConstantFloat(DataInputStream file) throws IOException
97    {
98      this(file.readFloat());
99    }
100   /**
101    * Called by objects that are traversing the nodes of the tree implicitely
102    * defined by the contents of a Java class. I.e., the hierarchy of methods,
103    * fields, attributes, etc. spawns a tree of objects.
104    *
105    * @param v Visitor object
106    */
107   public void accept(Visitor v) {
108     v.visitConstantFloat(this);
109   }
110   /**
111    * Dump constant float to file stream in binary format.
112    *
113    * @param file Output file stream
114    * @throws IOException
115    */
116   public final void dump(DataOutputStream file) throws IOException
117   {
118     file.writeByte(tag);
119     file.writeFloat(bytes);
120   }
121   /**
122    * @return data, i.e., 4 bytes.
123    */
124   public final float getBytes() { return bytes; }
125   /**
126    * @param bytes.
127    */
128   public final void setBytes(float bytes) {
129     this.bytes = bytes;
130   }
131 
132   /**
133    * @return String representation.
134    */
135   public final String toString() {
136     return super.toString() + "(bytes = " + bytes + ")";
137   }
138 
139   /** @return Float object
140    */
141   public Object getConstantValue(ConstantPool cp) {
142     return new Float(bytes);
143   }
144 }