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 <em>Attribute</em> and represents a reference
62 * to a <a href="http://www.inf.fu-berlin.de/~bokowski/pmgjava/index.html">PMG</a>
63 * attribute.
64 *
65 * @version $Id: PMGClass.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 Attribute
68 */
69 public final class PMGClass extends Attribute {
70 private int pmg_class_index, pmg_index;
71
72 /***
73 * Initialize from another object. Note that both objects use the same
74 * references (shallow copy). Use clone() for a physical copy.
75 */
76 public PMGClass(PMGClass c) {
77 this(c.getNameIndex(), c.getLength(), c.getPMGIndex(), c.getPMGClassIndex(),
78 c.getConstantPool());
79 }
80
81 /***
82 * Construct object from file stream.
83 * @param name_index Index in constant pool to CONSTANT_Utf8
84 * @param length Content length in bytes
85 * @param file Input stream
86 * @param constant_pool Array of constants
87 * @throws IOException
88 */
89 PMGClass(int name_index, int length, DataInputStream file,
90 ConstantPool constant_pool) throws IOException
91 {
92 this(name_index, length, file.readUnsignedShort(), file.readUnsignedShort(),
93 constant_pool);
94 }
95
96 /***
97 * @param name_index Index in constant pool to CONSTANT_Utf8
98 * @param length Content length in bytes
99 * @param constant_pool Array of constants
100 * @param PMGClass_index Index in constant pool to CONSTANT_Utf8
101 */
102 public PMGClass(int name_index, int length, int pmg_index, int pmg_class_index,
103 ConstantPool constant_pool)
104 {
105 super(Constants.ATTR_PMG, name_index, length, constant_pool);
106 this.pmg_index = pmg_index;
107 this.pmg_class_index = pmg_class_index;
108 }
109
110 /***
111 * Called by objects that are traversing the nodes of the tree implicitely
112 * defined by the contents of a Java class. I.e., the hierarchy of methods,
113 * fields, attributes, etc. spawns a tree of objects.
114 *
115 * @param v Visitor object
116 */
117 public void accept(Visitor v) {
118 System.err.println("Visiting non-standard PMGClass object");
119 }
120
121 /***
122 * Dump source file attribute to file stream in binary format.
123 *
124 * @param file Output file stream
125 * @throws IOException
126 */
127 public final void dump(DataOutputStream file) throws IOException
128 {
129 super.dump(file);
130 file.writeShort(pmg_index);
131 file.writeShort(pmg_class_index);
132 }
133
134 /***
135 * @return Index in constant pool of source file name.
136 */
137 public final int getPMGClassIndex() { return pmg_class_index; }
138
139 /***
140 * @param PMGClass_index.
141 */
142 public final void setPMGClassIndex(int pmg_class_index) {
143 this.pmg_class_index = pmg_class_index;
144 }
145
146 /***
147 * @return Index in constant pool of source file name.
148 */
149 public final int getPMGIndex() { return pmg_index; }
150
151 /***
152 * @param PMGClass_index.
153 */
154 public final void setPMGIndex(int pmg_index) {
155 this.pmg_index = pmg_index;
156 }
157
158 /***
159 * @return PMG name.
160 */
161 public final String getPMGName() {
162 ConstantUtf8 c = (ConstantUtf8)constant_pool.getConstant(pmg_index,
163 Constants.CONSTANT_Utf8);
164 return c.getBytes();
165 }
166
167 /***
168 * @return PMG class name.
169 */
170 public final String getPMGClassName() {
171 ConstantUtf8 c = (ConstantUtf8)constant_pool.getConstant(pmg_class_index,
172 Constants.CONSTANT_Utf8);
173 return c.getBytes();
174 }
175
176 /***
177 * @return String representation
178 */
179 public final String toString() {
180 return "PMGClass(" + getPMGName() + ", " + getPMGClassName() + ")";
181 }
182
183 /***
184 * @return deep copy of this attribute
185 */
186 public Attribute copy(ConstantPool constant_pool) {
187 return (PMGClass)clone();
188 }
189 }
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