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Java > Open Source Codes > proguard > classfile > visitor > ClassMemberVisitor


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 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.visitor;
22
23 import proguard.classfile.*;
24
25
26 /**
27  * This MemberVisitor delegates all visits to a given ClassVisitor.
28  * The latter visits the class of each visited class member, although
29  * never twice in a row.
30  *
31  * @author Eric Lafortune
32  */
33 public class ClassMemberVisitor implements MemberVisitor
34 {
35     private ClassVisitor classVisitor;
36
37     private Clazz lastVisitedClass;
38
39
40     public ClassMemberVisitor(ClassVisitor classVisitor)
41     {
42         this.classVisitor = classVisitor;
43     }
44
45
46     public void visitProgramField(ProgramClass programClass, ProgramField programField)
47     {
48         if (!programClass.equals(lastVisitedClass))
49         {
50             classVisitor.visitProgramClass(programClass);
51
52             lastVisitedClass = programClass;
53         }
54     }
55
56
57     public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
58     {
59         if (!programClass.equals(lastVisitedClass))
60         {
61             classVisitor.visitProgramClass(programClass);
62
63             lastVisitedClass = programClass;
64         }
65     }
66
67
68     public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
69     {
70         if (!libraryClass.equals(lastVisitedClass))
71         {
72             classVisitor.visitLibraryClass(libraryClass);
73
74             lastVisitedClass = libraryClass;
75         }
76     }
77
78
79     public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
80     {
81         if (!libraryClass.equals(lastVisitedClass))
82         {
83             classVisitor.visitLibraryClass(libraryClass);
84
85             lastVisitedClass = libraryClass;
86         }
87     }
88 }
89
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