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      1 /*
      2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
      3  *             of Java bytecode.
      4  *
      5  * Copyright (c) 2002-2009 Eric Lafortune (eric (at) 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.MemberVisitor;
     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 final 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