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Java > Open Source Codes > proguard > classfile > attribute > annotation > visitor > AnnotationToMemberVisitor


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.attribute.annotation.visitor;
22
23 import proguard.classfile.*;
24 import proguard.classfile.attribute.annotation.Annotation;
25 import proguard.classfile.util.SimplifiedVisitor;
26 import proguard.classfile.visitor.*;
27
28
29 /**
30  * This AnnotationVisitor delegates all visits to a given MemberVisitor.
31  * The latter visits the class member of each visited class member annotation
32  * or method parameter annotation, although never twice in a row.
33  *
34  * @author Eric Lafortune
35  */
36 public class AnnotationToMemberVisitor
37 extends SimplifiedVisitor
38 implements AnnotationVisitor
39 {
40     private MemberVisitor memberVisitor;
41
42     private Member lastVisitedMember;
43
44
45     public AnnotationToMemberVisitor(MemberVisitor memberVisitor)
46     {
47         this.memberVisitor = memberVisitor;
48     }
49
50
51     // Implementations for AnnotationVisitor.
52
53     public void visitAnnotation(Clazz clazz, Member member, Annotation annotation)
54     {
55         if (!member.equals(lastVisitedMember))
56         {
57             member.accept(clazz, memberVisitor);
58
59             lastVisitedMember = member;
60         }
61     }
62 }
63
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