1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5
6 package com.sun.org.apache.bcel.internal.classfile;
7
8 /* ====================================================================
9 * The Apache Software License, Version 1.1
10 *
11 * Copyright (c) 2001 The Apache Software Foundation. All rights
12 * reserved.
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 *
18 * 1. Redistributions of source code must retain the above copyright
19 * notice, this list of conditions and the following disclaimer.
20 *
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in
23 * the documentation and/or other materials provided with the
24 * distribution.
25 *
26 * 3. The end-user documentation included with the redistribution,
27 * if any, must include the following acknowledgment:
28 * "This product includes software developed by the
29 * Apache Software Foundation (http://www.apache.org/)."
30 * Alternately, this acknowledgment may appear in the software itself,
31 * if and wherever such third-party acknowledgments normally appear.
32 *
33 * 4. The names "Apache" and "Apache Software Foundation" and
34 * "Apache BCEL" must not be used to endorse or promote products
35 * derived from this software without prior written permission. For
36 * written permission, please contact apache@apache.org.
37 *
38 * 5. Products derived from this software may not be called "Apache",
39 * "Apache BCEL", nor may "Apache" appear in their name, without
40 * prior written permission of the Apache Software Foundation.
41 *
42 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
43 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
44 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
45 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
46 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
47 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
48 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
49 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
50 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
51 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
52 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * SUCH DAMAGE.
54 * ====================================================================
55 *
56 * This software consists of voluntary contributions made by many
57 * individuals on behalf of the Apache Software Foundation. For more
58 * information on the Apache Software Foundation, please see
59 * <http://www.apache.org/>.
60 */
61
62
63 import com.sun.org.apache.bcel.internal.Constants;
64 import java.io.*;
65
66 /**
67 * This class is derived from the abstract
68 * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class
69 * and represents a reference to an int object.
70 *
71 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A>
72 * @see Constant
73 */
74 public final class ConstantInteger extends Constant implements ConstantObject {
75 private int bytes;
76
77 /**
78 * @param bytes Data
79 */
80 public ConstantInteger(int bytes)
81 {
82 super(Constants.CONSTANT_Integer);
83 this.bytes = bytes;
84 }
85
86 /**
87 * Initialize from another object.
88 */
89 public ConstantInteger(ConstantInteger c) {
90 this(c.getBytes());
91 }
92
93 /**
94 * Initialize instance from file data.
95 *
96 * @param file Input stream
97 * @throws IOException
98 */
99 ConstantInteger(DataInputStream file) throws IOException
100 {
101 this(file.readInt());
102 }
103
104 /**
105 * Called by objects that are traversing the nodes of the tree implicitely
106 * defined by the contents of a Java class. I.e., the hierarchy of methods,
107 * fields, attributes, etc. spawns a tree of objects.
108 *
109 * @param v Visitor object
110 */
111 public void accept(Visitor v) {
112 v.visitConstantInteger(this);
113 }
114
115 /**
116 * Dump constant integer to file stream in binary format.
117 *
118 * @param file Output file stream
119 * @throws IOException
120 */
121 public final void dump(DataOutputStream file) throws IOException
122 {
123 file.writeByte(tag);
124 file.writeInt(bytes);
125 }
126
127 /**
128 * @return data, i.e., 4 bytes.
129 */
130 public final int getBytes() { return bytes; }
131
132 /**
133 * @param bytes.
134 */
135 public final void setBytes(int bytes) {
136 this.bytes = bytes;
137 }
138
139 /**
140 * @return String representation.
141 */
142 public final String toString() {
143 return super.toString() + "(bytes = " + bytes + ")";
144 }
145
146 /** @return Integer object
147 */
148 public Object getConstantValue(ConstantPool cp) {
149 return new Integer(bytes);
150 }
151 }