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


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 a Uninitialized type.
29  *
30  * @author Eric Lafortune
31  */

32 public class UninitializedType extends VerificationType
33 {
34     public int u2newInstructionOffset;
35
36
37     /**
38      * Creates an uninitialized UninitializedType.
39      */

40     public UninitializedType()
41     {
42     }
43
44
45     /**
46      * Creates an UninitializedType pointing to the given 'new' instruction.
47      */

48     public UninitializedType(int u2newInstructionOffset)
49     {
50         this.u2newInstructionOffset = u2newInstructionOffset;
51     }
52
53
54     // Implementations for VerificationType.
55

56     public int getTag()
57     {
58         return UNINITIALIZED_TYPE;
59     }
60
61
62     public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, VerificationTypeVisitor verificationTypeVisitor)
63     {
64         verificationTypeVisitor.visitUninitializedType(clazz, method, codeAttribute, instructionOffset, this);
65     }
66
67
68     public void stackAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int stackIndex, VerificationTypeVisitor verificationTypeVisitor)
69     {
70         verificationTypeVisitor.visitStackUninitializedType(clazz, method, codeAttribute, instructionOffset, stackIndex, this);
71     }
72
73
74     public void variablesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int variableIndex, VerificationTypeVisitor verificationTypeVisitor)
75     {
76         verificationTypeVisitor.visitVariablesUninitializedType(clazz, method, codeAttribute, instructionOffset, variableIndex, this);
77     }
78
79
80     // Implementations for Object.
81

82     public boolean equals(Object JavaDoc object)
83     {
84         if (!super.equals(object))
85         {
86             return false;
87         }
88
89         UninitializedType other = (UninitializedType)object;
90
91         return this.u2newInstructionOffset == other.u2newInstructionOffset;
92     }
93
94
95     public int hashCode()
96     {
97         return super.hashCode() ^
98                u2newInstructionOffset;
99     }
100
101
102     public String JavaDoc toString()
103     {
104         return "u:" + u2newInstructionOffset;
105     }
106 }
107
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