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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 ClassVisitor delegates all method calls to a ClassVisitor
     28  * that can be changed at any time.
     29  *
     30  * @author Eric Lafortune
     31  */
     32 public class VariableClassVisitor implements ClassVisitor
     33 {
     34     private ClassVisitor classVisitor;
     35 
     36 
     37     public VariableClassVisitor()
     38     {
     39         this(null);
     40     }
     41 
     42 
     43     public VariableClassVisitor(ClassVisitor classVisitor)
     44     {
     45         this.classVisitor = classVisitor;
     46     }
     47 
     48 
     49     public void setClassVisitor(ClassVisitor classVisitor)
     50     {
     51         this.classVisitor = classVisitor;
     52     }
     53 
     54     public ClassVisitor getClassVisitor()
     55     {
     56         return classVisitor;
     57     }
     58 
     59 
     60     // Implementations for ClassVisitor.
     61 
     62     public void visitProgramClass(ProgramClass programClass)
     63     {
     64         if (classVisitor != null)
     65         {
     66             classVisitor.visitProgramClass(programClass);
     67         }
     68     }
     69 
     70 
     71     public void visitLibraryClass(LibraryClass libraryClass)
     72     {
     73         if (classVisitor != null)
     74         {
     75             classVisitor.visitLibraryClass(libraryClass);
     76         }
     77     }
     78 }
     79