AnnotatedClassVisitor.java revision cfead78069f3dc32998dc118ee08cab3867acea2 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2011 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.attribute.annotation.visitor;
22
23import proguard.classfile.Clazz;
24import proguard.classfile.attribute.annotation.Annotation;
25import proguard.classfile.util.SimplifiedVisitor;
26import proguard.classfile.visitor.ClassVisitor;
27
28
29/**
30 * This AnnotationVisitor delegates all visits to a given ClassVisitor.
31 * The latter visits the class of each visited annotation, although
32 * never twice in a row.
33 *
34 * @author Eric Lafortune
35 */
36public class AnnotatedClassVisitor
37extends      SimplifiedVisitor
38implements   AnnotationVisitor
39{
40    private final ClassVisitor classVisitor;
41
42    private Clazz lastVisitedClass;
43
44
45    public AnnotatedClassVisitor(ClassVisitor classVisitor)
46    {
47        this.classVisitor = classVisitor;
48    }
49
50
51    // Implementations for AnnotationVisitor.
52
53    public void visitAnnotation(Clazz clazz, Annotation annotation)
54    {
55        if (!clazz.equals(lastVisitedClass))
56        {
57            clazz.accept(classVisitor);
58
59            lastVisitedClass = clazz;
60        }
61    }
62}
63