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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.visitor;
     22 
     23 import proguard.classfile.*;
     24 
     25 
     26 /**
     27  * This <code>MemberVisitor</code> delegates its visits to another given
     28  * <code>MemberVisitor</code>, but only when visiting members of program
     29  * classes.
     30  *
     31  * @author Eric Lafortune
     32  */
     33 public class ProgramMemberFilter implements MemberVisitor
     34 {
     35     private final MemberVisitor memberVisitor;
     36 
     37 
     38     /**
     39      * Creates a new ProgramMemberFilter.
     40      * @param memberVisitor     the <code>MemberVisitor</code> to which
     41      *                          visits will be delegated.
     42      */
     43     public ProgramMemberFilter(MemberVisitor memberVisitor)
     44     {
     45         this.memberVisitor = memberVisitor;
     46     }
     47 
     48 
     49     // Implementations for MemberVisitor.
     50 
     51     public void visitProgramField(ProgramClass programClass, ProgramField programField)
     52     {
     53         memberVisitor.visitProgramField(programClass, programField);
     54     }
     55 
     56 
     57     public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
     58     {
     59         memberVisitor.visitProgramMethod(programClass, programMethod);
     60     }
     61 
     62 
     63     public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
     64     {
     65         // Don't delegate visits to library members.
     66     }
     67 
     68 
     69     public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
     70     {
     71         // Don't delegate visits to library members.
     72     }
     73 }
     74