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


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 <code>MemberVisitor</code> delegates its visits to another given
28  * <code>MemberVisitor</code>, but only when visiting members of library
29  * classes.
30  *
31  * @author Eric Lafortune
32  */
33 public class LibraryMemberFilter implements MemberVisitor
34 {
35     private MemberVisitor memberVisitor;
36
37
38     /**
39      * Creates a new ProgramMemberFilter.
40      * @param memberVisitor the <code>MemberVisitor</code> to which
41      * visits will be delegated.
42      */
43     public LibraryMemberFilter(MemberVisitor memberVisitor)
44     {
45         this.memberVisitor = memberVisitor;
46     }
47
48
49     // Implementations for MemberVisitor.
50
51     public void visitProgramField(ProgramClass programClass, ProgramField programField)
52     {
53         // Don't delegate visits to program members.
54 }
55
56
57     public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
58     {
59         // Don't delegate visits to program members.
60 }
61
62
63     public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
64     {
65         memberVisitor.visitLibraryField(libraryClass, libraryField);
66     }
67
68
69     public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
70     {
71         memberVisitor.visitLibraryMethod(libraryClass, libraryMethod);
72     }
73 }
74
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