1/* 2 * ProGuard -- shrinking, optimization, obfuscation, and preverification 3 * of Java bytecode. 4 * 5 * Copyright (c) 2002-2009 Eric Lafortune (eric@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 */ 21package proguard.obfuscate; 22 23import proguard.classfile.*; 24import proguard.classfile.visitor.MemberVisitor; 25 26/** 27 * This <code>MemberVisitor</code> delegates its visits to another given 28 * <code>MemberVisitor</code>, but only when the visited member has a 29 * special new name. A special name is a name that might have been produced by 30 * a <code>SpecialNameFactory</code>. 31 * 32 * @see MemberObfuscator 33 * @see SpecialNameFactory 34 * 35 * @author Eric Lafortune 36 */ 37public class MemberSpecialNameFilter implements MemberVisitor 38{ 39 private final MemberVisitor memberVisitor; 40 41 42 /** 43 * Creates a new MemberSpecialNameFilter. 44 * @param memberVisitor the <code>MemberVisitor</code> to which 45 * visits will be delegated. 46 */ 47 public MemberSpecialNameFilter(MemberVisitor memberVisitor) 48 { 49 this.memberVisitor = memberVisitor; 50 } 51 52 53 // Implementations for MemberVisitor. 54 55 public void visitProgramField(ProgramClass programClass, ProgramField programField) 56 { 57 if (isSpecialName(programField)) 58 { 59 memberVisitor.visitProgramField(programClass, programField); 60 } 61 } 62 63 64 public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod) 65 { 66 if (isSpecialName(programMethod)) 67 { 68 memberVisitor.visitProgramMethod(programClass, programMethod); 69 } 70 } 71 72 73 public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField) 74 { 75 if (isSpecialName(libraryField)) 76 { 77 memberVisitor.visitLibraryField(libraryClass, libraryField); 78 } 79 } 80 81 82 public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod) 83 { 84 if (isSpecialName(libraryMethod)) 85 { 86 memberVisitor.visitLibraryMethod(libraryClass, libraryMethod); 87 } 88 } 89 90 91 // Small utility methods. 92 93 /** 94 * Returns whether the given class member has a special new name. 95 * @param member the class member. 96 */ 97 private static boolean isSpecialName(Member member) 98 { 99 return SpecialNameFactory.isSpecialName(MemberObfuscator.newMemberName(member)); 100 } 101} 102