1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  *             of Java bytecode.
4  *
5  * Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This program 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 program 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 General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along
18  * with this program; if not, write to the Free Software Foundation, Inc.,
19  * 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 Top type.
29  *
30  * @author Eric Lafortune
31  */
32 public class TopType extends VerificationType
33 {
34     // Implementations for VerificationType.
35 
getTag()36     public int getTag()
37     {
38         return TOP_TYPE;
39     }
40 
41 
accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, VerificationTypeVisitor verificationTypeVisitor)42     public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, VerificationTypeVisitor verificationTypeVisitor)
43     {
44         verificationTypeVisitor.visitTopType(clazz, method, codeAttribute, instructionOffset, this);
45     }
46 
47 
stackAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int stackIndex, VerificationTypeVisitor verificationTypeVisitor)48     public void stackAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int stackIndex, VerificationTypeVisitor verificationTypeVisitor)
49     {
50         verificationTypeVisitor.visitStackTopType(clazz, method, codeAttribute, instructionOffset, stackIndex, this);
51     }
52 
53 
variablesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int variableIndex, VerificationTypeVisitor verificationTypeVisitor)54     public void variablesAccept(Clazz clazz, Method method, CodeAttribute codeAttribute, int instructionOffset, int variableIndex, VerificationTypeVisitor verificationTypeVisitor)
55     {
56         verificationTypeVisitor.visitVariablesTopType(clazz, method, codeAttribute, instructionOffset, variableIndex, this);
57     }
58 
59 
60     // Implementations for Object.
61 
toString()62     public String toString()
63     {
64         return "T";
65     }
66 }
67