01: /*
02: * ProGuard -- shrinking, optimization, obfuscation, and preverification
03: * of Java bytecode.
04: *
05: * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
06: *
07: * This program is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU General Public License as published by the Free
09: * 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.obfuscate;
22:
23: import proguard.classfile.*;
24: import 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: */
37: public class MemberSpecialNameFilter implements MemberVisitor {
38: private final MemberVisitor memberVisitor;
39:
40: /**
41: * Creates a new MemberSpecialNameFilter.
42: * @param memberVisitor the <code>MemberVisitor</code> to which
43: * visits will be delegated.
44: */
45: public MemberSpecialNameFilter(MemberVisitor memberVisitor) {
46: this .memberVisitor = memberVisitor;
47: }
48:
49: // Implementations for MemberVisitor.
50:
51: public void visitProgramField(ProgramClass programClass,
52: ProgramField programField) {
53: if (isSpecialName(programField)) {
54: memberVisitor.visitProgramField(programClass, programField);
55: }
56: }
57:
58: public void visitProgramMethod(ProgramClass programClass,
59: ProgramMethod programMethod) {
60: if (isSpecialName(programMethod)) {
61: memberVisitor.visitProgramMethod(programClass,
62: programMethod);
63: }
64: }
65:
66: public void visitLibraryField(LibraryClass libraryClass,
67: LibraryField libraryField) {
68: if (isSpecialName(libraryField)) {
69: memberVisitor.visitLibraryField(libraryClass, libraryField);
70: }
71: }
72:
73: public void visitLibraryMethod(LibraryClass libraryClass,
74: LibraryMethod libraryMethod) {
75: if (isSpecialName(libraryMethod)) {
76: memberVisitor.visitLibraryMethod(libraryClass,
77: libraryMethod);
78: }
79: }
80:
81: // Small utility methods.
82:
83: /**
84: * Returns whether the given class member has a special new name.
85: * @param member the class member.
86: */
87: private static boolean isSpecialName(Member member) {
88: return SpecialNameFactory.isSpecialName(MemberObfuscator
89: .newMemberName(member));
90: }
91: }
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