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


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>ClassVisitor</code> delegates its visits to another given
28  * <code>ClassVisitor</code>, but only when visiting program classes.
29  *
30  * @author Eric Lafortune
31  */
32 public class ProgramClassFilter implements ClassVisitor
33 {
34     private ClassVisitor classVisitor;
35
36
37     /**
38      * Creates a new ProgramClassFilter.
39      * @param classVisitor the <code>ClassVisitor</code> to which visits
40      * will be delegated.
41      */
42     public ProgramClassFilter(ClassVisitor classVisitor)
43     {
44         this.classVisitor = classVisitor;
45     }
46
47
48     // Implementations for ClassVisitor.
49
50     public void visitProgramClass(ProgramClass programClass)
51     {
52         classVisitor.visitProgramClass(programClass);
53     }
54
55
56     public void visitLibraryClass(LibraryClass libraryClass)
57     {
58         // Don't delegate visits to library classes.
59 }
60 }
61
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