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comparison src/com/go/trove/classfile/ConstantClassInfo.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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1 /* ====================================================================
2 * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group
3 * ====================================================================
4 * The Tea Software License, Version 1.1
5 *
6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. The end-user documentation included with the redistribution,
21 * if any, must include the following acknowledgment:
22 * "This product includes software developed by the
23 * Walt Disney Internet Group (http://opensource.go.com/)."
24 * Alternately, this acknowledgment may appear in the software itself,
25 * if and wherever such third-party acknowledgments normally appear.
26 *
27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
28 * not be used to endorse or promote products derived from this
29 * software without prior written permission. For written
30 * permission, please contact opensource@dig.com.
31 *
32 * 5. Products derived from this software may not be called "Tea",
33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
35 * written permission of the Walt Disney Internet Group.
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 WALT DISNEY INTERNET GROUP OR ITS
41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 * ====================================================================
49 *
50 * For more information about Tea, please see http://opensource.go.com/.
51 */
52
53 package com.go.trove.classfile;
54
55 import java.io.*;
56
57 /******************************************************************************
58 * This class corresponds to the CONSTANT_Class_info structure as defined in
59 * section 4.4.1 of <i>The Java Virtual Machine Specification</i>.
60 *
61 * @author Brian S O'Neill
62 * @version
63 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/05/14 <!-- $-->
64 */
65 public class ConstantClassInfo extends ConstantInfo {
66 private String mClassName;
67 private int mDim;
68 private TypeDescriptor mType;
69
70 private ConstantUTFInfo mNameConstant;
71
72 /**
73 * Will return either a new ConstantClassInfo object or one already in
74 * the constant pool. If it is a new ConstantClassInfo, it will be inserted
75 * into the pool.
76 */
77 static ConstantClassInfo make(ConstantPool cp, String className) {
78 ConstantInfo ci = new ConstantClassInfo(cp, className);
79 return (ConstantClassInfo)cp.addConstant(ci);
80 }
81
82 /** Used to describe an array class. */
83 static ConstantClassInfo make(ConstantPool cp,
84 String className, int dim) {
85 ConstantInfo ci = new ConstantClassInfo(cp, className, dim);
86 return (ConstantClassInfo)cp.addConstant(ci);
87 }
88
89 static ConstantClassInfo make(ConstantPool cp,
90 TypeDescriptor type) {
91 ConstantInfo ci = new ConstantClassInfo(cp, type);
92 return (ConstantClassInfo)cp.addConstant(ci);
93 }
94
95 ConstantClassInfo(ConstantUTFInfo nameConstant) {
96 super(TAG_CLASS);
97 mNameConstant = nameConstant;
98 String name = nameConstant.getValue();
99 if (!name.endsWith(";") && !name.startsWith("[")) {
100 mClassName = name.replace('/', '.');
101 mDim = 0;
102 }
103 else {
104 TypeDescriptor desc = TypeDescriptor.parseTypeDesc(name);
105 mClassName = desc.getClassName();
106 mDim = desc.getDimensions();
107 }
108 }
109
110 private ConstantClassInfo(ConstantPool cp, String className) {
111 super(TAG_CLASS);
112
113 mClassName = className;
114 mDim = 0;
115
116 String desc = className.replace('.', '/');
117 mNameConstant = ConstantUTFInfo.make(cp, desc);
118 }
119
120 /** Used to describe an array class. */
121 private ConstantClassInfo(ConstantPool cp, String className, int dim) {
122 super(TAG_CLASS);
123
124 mClassName = className;
125 mDim = dim;
126
127 String desc;
128 if (dim > 0) {
129 desc = TypeDescriptor.generate(className, dim);
130 }
131 else {
132 desc = className.replace('.', '/');
133 }
134
135 mNameConstant = ConstantUTFInfo.make(cp, desc);
136 }
137
138 private ConstantClassInfo(ConstantPool cp, TypeDescriptor type) {
139 super(TAG_CLASS);
140
141 mClassName = type.getClassName();
142 mDim = type.getDimensions();
143 mType = type;
144
145 String desc;
146 if (mDim > 0) {
147 desc = type.toString();
148 }
149 else {
150 desc = type.getClassName().replace('.', '/');
151 }
152
153 mNameConstant = ConstantUTFInfo.make(cp, desc);
154 }
155
156 public String getClassName() {
157 return mClassName;
158 }
159
160 public int getDimensions() {
161 return mDim;
162 }
163
164 public TypeDescriptor getTypeDescriptor() {
165 if (mType == null) {
166 mType = new TypeDescriptor(getClassName());
167
168 int dim = getDimensions();
169 if (dim > 0) {
170 mType = new TypeDescriptor(mType, dim);
171 }
172 }
173
174 return mType;
175 }
176
177 public int hashCode() {
178 return mClassName.hashCode();
179 }
180
181 public boolean equals(Object obj) {
182 if (obj instanceof ConstantClassInfo) {
183 ConstantClassInfo other = (ConstantClassInfo)obj;
184 return mClassName.equals(other.mClassName) && mDim == other.mDim;
185 }
186
187 return false;
188 }
189
190 public void writeTo(DataOutput dout) throws IOException {
191 super.writeTo(dout);
192 dout.writeShort(mNameConstant.getIndex());
193 }
194
195 public String toString() {
196 StringBuffer buf = new StringBuffer("CONSTANT_Class_info: ");
197 buf.append(getClassName());
198 for (int i = getDimensions(); i > 0; i--) {
199 buf.append('[');
200 buf.append(']');
201 }
202 return buf.toString();
203 }
204 }