01: /*
02: * ProGuard -- shrinking, optimization, obfuscation, and preverification
03: * of Java bytecode.
04: *
05: * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
06: *
07: * This library is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU General Public License as published by the Free
09: * 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: public int u2classIndex;
34:
35: /**
36: * Creates an uninitialized ObjectType.
37: */
38: public ObjectType() {
39: }
40:
41: /**
42: * Creates an ObjectType that points to the given class constant.
43: */
44: public ObjectType(int u2classIndex) {
45: this .u2classIndex = u2classIndex;
46: }
47:
48: // Implementations for VerificationType.
49:
50: public int getTag() {
51: return OBJECT_TYPE;
52: }
53:
54: public void accept(Clazz clazz, Method method,
55: CodeAttribute codeAttribute, int instructionOffset,
56: VerificationTypeVisitor verificationTypeVisitor) {
57: verificationTypeVisitor.visitObjectType(clazz, method,
58: codeAttribute, instructionOffset, this );
59: }
60:
61: public void stackAccept(Clazz clazz, Method method,
62: CodeAttribute codeAttribute, int instructionOffset,
63: int stackIndex,
64: VerificationTypeVisitor verificationTypeVisitor) {
65: verificationTypeVisitor.visitStackObjectType(clazz, method,
66: codeAttribute, instructionOffset, stackIndex, this );
67: }
68:
69: public void variablesAccept(Clazz clazz, Method method,
70: CodeAttribute codeAttribute, int instructionOffset,
71: int variableIndex,
72: VerificationTypeVisitor verificationTypeVisitor) {
73: verificationTypeVisitor.visitVariablesObjectType(clazz, method,
74: codeAttribute, instructionOffset, variableIndex, this );
75: }
76:
77: // Implementations for Object.
78:
79: public boolean equals(Object object) {
80: if (!super .equals(object)) {
81: return false;
82: }
83:
84: ObjectType other = (ObjectType) object;
85:
86: return this .u2classIndex == other.u2classIndex;
87: }
88:
89: public int hashCode() {
90: return super .hashCode() ^ u2classIndex;
91: }
92:
93: public String toString() {
94: return "a:" + u2classIndex;
95: }
96: }
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