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 Double object.
64 *
65 * @version $Id: ConstantDouble.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 ConstantDouble extends Constant implements ConstantObject {
70 private double bytes;
71
72 /***
73 * @param bytes Data
74 */
75 public ConstantDouble(double bytes) {
76 super(Constants.CONSTANT_Double);
77 this.bytes = bytes;
78 }
79
80 /***
81 * Initialize from another object.
82 */
83 public ConstantDouble(ConstantDouble c) {
84 this(c.getBytes());
85 }
86
87 /***
88 * Initialize instance from file data.
89 *
90 * @param file Input stream
91 * @throws IOException
92 */
93 ConstantDouble(DataInputStream file) throws IOException
94 {
95 this(file.readDouble());
96 }
97
98 /***
99 * Called by objects that are traversing the nodes of the tree implicitely
100 * defined by the contents of a Java class. I.e., the hierarchy of methods,
101 * fields, attributes, etc. spawns a tree of objects.
102 *
103 * @param v Visitor object
104 */
105 public void accept(Visitor v) {
106 v.visitConstantDouble(this);
107 }
108 /***
109 * Dump constant double to file stream in binary format.
110 *
111 * @param file Output file stream
112 * @throws IOException
113 */
114 public final void dump(DataOutputStream file) throws IOException
115 {
116 file.writeByte(tag);
117 file.writeDouble(bytes);
118 }
119 /***
120 * @return data, i.e., 8 bytes.
121 */
122 public final double getBytes() { return bytes; }
123 /***
124 * @param bytes.
125 */
126 public final void setBytes(double bytes) {
127 this.bytes = bytes;
128 }
129 /***
130 * @return String representation.
131 */
132 public final String toString()
133 {
134 return super.toString() + "(bytes = " + bytes + ")";
135 }
136
137 /*** @return Double object
138 */
139 public Object getConstantValue(ConstantPool cp) {
140 return new Double(bytes);
141 }
142 }
This page was automatically generated by Maven