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


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 MemberToClassVisitor implements MemberVisitor
34 {
35     private ClassVisitor classVisitor;
36
37     private Clazz lastVisitedClass;
38
39
40     public MemberToClassVisitor(ClassVisitor classVisitor)
41     {
42         this.classVisitor = classVisitor;
43     }
44
45
46     // Implementations for MemberVisitor.
47
48     public void visitProgramField(ProgramClass programClass, ProgramField programField)
49     {
50         if (!programClass.equals(lastVisitedClass))
51         {
52             classVisitor.visitProgramClass(programClass);
53
54             lastVisitedClass = programClass;
55         }
56     }
57
58
59     public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
60     {
61         if (!programClass.equals(lastVisitedClass))
62         {
63             classVisitor.visitProgramClass(programClass);
64
65             lastVisitedClass = programClass;
66         }
67     }
68
69
70     public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
71     {
72         if (!libraryClass.equals(lastVisitedClass))
73         {
74             classVisitor.visitLibraryClass(libraryClass);
75
76             lastVisitedClass = libraryClass;
77         }
78     }
79
80
81     public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
82     {
83         if (!libraryClass.equals(lastVisitedClass))
84         {
85             classVisitor.visitLibraryClass(libraryClass);
86
87             lastVisitedClass = libraryClass;
88         }
89     }
90 }
91
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