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      1 /*
      2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
      3  *             of Java bytecode.
      4  *
      5  * Copyright (c) 2002-2014 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;
     22 
     23 import proguard.classfile.*;
     24 import proguard.classfile.visitor.ClassVisitor;
     25 
     26 /**
     27  * This ClassVisitor delegates all its method calls to another ClassVisitor,
     28  * but only for Clazz objects that are being subclassed.
     29  *
     30  * @author Eric Lafortune
     31  */
     32 final class SubclassedClassFilter
     33 implements ClassVisitor
     34 {
     35     private final ClassVisitor classVisitor;
     36 
     37 
     38     public SubclassedClassFilter(ClassVisitor classVisitor)
     39     {
     40         this.classVisitor = classVisitor;
     41     }
     42 
     43 
     44     // Implementations for ClassVisitor.
     45 
     46     public void visitProgramClass(ProgramClass programClass)
     47     {
     48         if (programClass.subClasses != null)
     49         {
     50             classVisitor.visitProgramClass(programClass);
     51         }
     52     }
     53 
     54 
     55     public void visitLibraryClass(LibraryClass libraryClass)
     56     {
     57         if (libraryClass.subClasses != null)
     58         {
     59             classVisitor.visitLibraryClass(libraryClass);
     60         }
     61     }
     62 }
     63