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Java > Open Source Codes > proguard > classfile > attribute > preverification > ObjectType


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This library is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This library is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
15  * for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with this library; if not, write to the Free Software Foundation,
19  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.classfile.attribute.preverification;
22
23 import proguard.classfile.*;
24 import proguard.classfile.attribute.CodeAttribute;
25 import proguard.classfile.attribute.preverification.visitor.VerificationTypeVisitor;
26
27 /**
28  * This VerificationType represents an Object type.
29  *
30  * @author Eric Lafortune
31  */
32 public class ObjectType extends VerificationType
33 {
34     public int u2classIndex;
35
36
37
38     /**
39      * Creates an uninitialized ObjectType.
40      */
41     public ObjectType()
42     {
43     }
44
45
46     /**
47      * Creates an ObjectType that points to the given class constant.
48      */
49     public ObjectType(int u2classIndex)
50     {
51         this.u2classIndex = u2classIndex;
52     }
53
54
55     // Implementations for VerificationType.
56
57     public int getTag()
58     {
59         return OBJECT_TYPE;
60     }
61
62
63     public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, VerificationTypeVisitor verificationTypeVisitor)
64     {
65         verificationTypeVisitor.visitObjectType(clazz, method, codeAttribute, instructionOffset, this);
66     }
67
68
69     public void stackAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int stackIndex, VerificationTypeVisitor verificationTypeVisitor)
70     {
71         verificationTypeVisitor.visitStackObjectType(clazz, method, codeAttribute, instructionOffset, stackIndex, this);
72     }
73
74
75     public void variablesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int variableIndex, VerificationTypeVisitor verificationTypeVisitor)
76     {
77         verificationTypeVisitor.visitVariablesObjectType(clazz, method, codeAttribute, instructionOffset, variableIndex, this);
78     }
79
80
81     // Implementations for Object.
82
83     public boolean equals(Object JavaDoc object)
84     {
85         if (!super.equals(object))
86         {
87             return false;
88         }
89
90         ObjectType other = (ObjectType)object;
91
92         return this.u2classIndex == other.u2classIndex;
93     }
94
95
96     public int hashCode()
97     {
98         return super.hashCode() ^
99                u2classIndex;
100     }
101
102
103     public String JavaDoc toString()
104     {
105         return "a:" + u2classIndex;
106     }
107 }
108
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