LibraryClassFilter.java revision b9cc48a43ed984587c939d02fba5316bf5c0df6e 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2013 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 */
21package proguard.classfile.visitor;
22
23import proguard.classfile.*;
24
25
26/**
27 * This <code>ClassVisitor</code> delegates its visits to another given
28 * <code>ClassVisitor</code>, but only when visiting library classes.
29 *
30 * @author Eric Lafortune
31 */
32public class LibraryClassFilter implements ClassVisitor
33{
34    private final ClassVisitor classVisitor;
35
36
37    /**
38     * Creates a new LibraryClassFilter.
39     * @param classVisitor     the <code>ClassVisitor</code> to which visits
40     *                         will be delegated.
41     */
42    public LibraryClassFilter(ClassVisitor classVisitor)
43    {
44        this.classVisitor = classVisitor;
45    }
46
47
48    // Implementations for ClassVisitor.
49
50    public void visitProgramClass(ProgramClass programClass)
51    {
52        // Don't delegate visits to program classes.
53    }
54
55
56    public void visitLibraryClass(LibraryClass libraryClass)
57    {
58        classVisitor.visitLibraryClass(libraryClass);
59    }
60}
61