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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  * This <code>MemberVisitor</code> lets a given <code>MemberVisitor</code>
     27  * visit all members that have the same name and type as the visited methods
     28  * in the class hierarchy of a given target class.
     29  *
     30  * @author Eric Lafortune
     31  */
     32 public class SimilarMemberVisitor
     33 implements   MemberVisitor
     34 {
     35     private final Clazz         targetClass;
     36     private final boolean       visitThisMember;
     37     private final boolean       visitSuperMembers;
     38     private final boolean       visitInterfaceMembers;
     39     private final boolean       visitOverridingMembers;
     40     private final MemberVisitor memberVisitor;
     41 
     42 
     43     /**
     44      * Creates a new SimilarMemberVisitor.
     45      * @param targetClass            the class in whose hierarchy to look for
     46      *                               the visited class members.
     47      * @param visitThisMember        specifies whether to visit the class
     48      *                               members in the target class itself.
     49      * @param visitSuperMembers      specifies whether to visit the class
     50      *                               members in the super classes of the target
     51      *                               class.
     52      * @param visitInterfaceMembers  specifies whether to visit the class
     53      *                               members in the interface classes of the
     54      *                               target class.
     55      * @param visitOverridingMembers specifies whether to visit the class
     56      *                               members in the subclasses of the target
     57      *                               class.
     58      * @param memberVisitor          the <code>MemberVisitor</code> to which
     59      *                               visits will be delegated.
     60      */
     61     public SimilarMemberVisitor(Clazz         targetClass,
     62                                 boolean       visitThisMember,
     63                                 boolean       visitSuperMembers,
     64                                 boolean       visitInterfaceMembers,
     65                                 boolean       visitOverridingMembers,
     66                                 MemberVisitor memberVisitor)
     67     {
     68         this.targetClass            = targetClass;
     69         this.visitThisMember        = visitThisMember;
     70         this.visitSuperMembers      = visitSuperMembers;
     71         this.visitInterfaceMembers  = visitInterfaceMembers;
     72         this.visitOverridingMembers = visitOverridingMembers;
     73         this.memberVisitor          = memberVisitor;
     74     }
     75 
     76 
     77     // Implementations for MemberVisitor.
     78 
     79     public void visitProgramField(ProgramClass programClass, ProgramField programField)
     80     {
     81         targetClass.hierarchyAccept(visitThisMember,
     82                                     visitSuperMembers,
     83                                     visitInterfaceMembers,
     84                                     visitOverridingMembers,
     85                                     new NamedFieldVisitor(programField.getName(programClass),
     86                                                           programField.getDescriptor(programClass),
     87                                                           memberVisitor));
     88     }
     89 
     90 
     91     public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
     92     {
     93         targetClass.hierarchyAccept(visitThisMember,
     94                                     visitSuperMembers,
     95                                     visitInterfaceMembers,
     96                                     visitOverridingMembers,
     97                                     new NamedFieldVisitor(libraryField.getName(libraryClass),
     98                                                           libraryField.getDescriptor(libraryClass),
     99                                                           memberVisitor));
    100     }
    101 
    102 
    103     public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
    104     {
    105         targetClass.hierarchyAccept(visitThisMember,
    106                                     visitSuperMembers,
    107                                     visitInterfaceMembers,
    108                                     visitOverridingMembers,
    109                                     new NamedMethodVisitor(programMethod.getName(programClass),
    110                                                            programMethod.getDescriptor(programClass),
    111                                                            memberVisitor));
    112     }
    113 
    114 
    115     public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
    116     {
    117         targetClass.hierarchyAccept(visitThisMember,
    118                                     visitSuperMembers,
    119                                     visitInterfaceMembers,
    120                                     visitOverridingMembers,
    121                                     new NamedMethodVisitor(libraryMethod.getName(libraryClass),
    122                                                            libraryMethod.getDescriptor(libraryClass),
    123                                                            memberVisitor));
    124     }
    125 }