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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.classfile.visitor;
     22 
     23 import proguard.classfile.*;
     24 
     25 
     26 /**
     27  * This MemberVisitor delegates all visits to a given ClassVisitor.
     28  * The latter visits the class of each visited class member, although
     29  * never twice in a row.
     30  *
     31  * @author Eric Lafortune
     32  */
     33 public class MemberToClassVisitor implements MemberVisitor
     34 {
     35     private final ClassVisitor classVisitor;
     36 
     37     private Clazz lastVisitedClass;
     38 
     39 
     40     public MemberToClassVisitor(ClassVisitor classVisitor)
     41     {
     42         this.classVisitor = classVisitor;
     43     }
     44 
     45 
     46     // Implementations for MemberVisitor.
     47 
     48     public void visitProgramField(ProgramClass programClass, ProgramField programField)
     49     {
     50         if (!programClass.equals(lastVisitedClass))
     51         {
     52             classVisitor.visitProgramClass(programClass);
     53 
     54             lastVisitedClass = programClass;
     55         }
     56     }
     57 
     58 
     59     public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
     60     {
     61         if (!programClass.equals(lastVisitedClass))
     62         {
     63             classVisitor.visitProgramClass(programClass);
     64 
     65             lastVisitedClass = programClass;
     66         }
     67     }
     68 
     69 
     70     public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
     71     {
     72         if (!libraryClass.equals(lastVisitedClass))
     73         {
     74             classVisitor.visitLibraryClass(libraryClass);
     75 
     76             lastVisitedClass = libraryClass;
     77         }
     78     }
     79 
     80 
     81     public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
     82     {
     83         if (!libraryClass.equals(lastVisitedClass))
     84         {
     85             classVisitor.visitLibraryClass(libraryClass);
     86 
     87             lastVisitedClass = libraryClass;
     88         }
     89     }
     90 }
     91