1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2014 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.attribute.*;
25import proguard.classfile.attribute.visitor.*;
26import proguard.classfile.constant.ClassConstant;
27import proguard.classfile.constant.visitor.ConstantVisitor;
28import proguard.classfile.util.*;
29import proguard.classfile.visitor.*;
30
31
32/**
33 * This <code>ClassVisitor</code> and <code>MemberVisitor</code>
34 * marks names of the classes and class members it visits. The marked names
35 * will remain unchanged in the obfuscation step.
36 *
37 * @see ClassObfuscator
38 * @see MemberObfuscator
39 *
40 * @author Eric Lafortune
41 */
42class      NameMarker
43extends    SimplifiedVisitor
44implements ClassVisitor,
45           MemberVisitor,
46           AttributeVisitor,
47           InnerClassesInfoVisitor,
48           ConstantVisitor
49{
50    // Implementations for ClassVisitor.
51
52    public void visitProgramClass(ProgramClass programClass)
53    {
54        keepClassName(programClass);
55
56        // Make sure any outer class names are kept as well.
57        programClass.attributesAccept(this);
58    }
59
60
61    public void visitLibraryClass(LibraryClass libraryClass)
62    {
63        keepClassName(libraryClass);
64    }
65
66
67    // Implementations for MemberVisitor.
68
69    public void visitProgramField(ProgramClass programClass, ProgramField programField)
70    {
71        keepFieldName(programClass, programField);
72    }
73
74
75    public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
76    {
77        keepMethodName(programClass, programMethod);
78    }
79
80
81    public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
82    {
83        keepFieldName(libraryClass, libraryField);
84    }
85
86
87    public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
88    {
89        keepMethodName(libraryClass, libraryMethod);
90    }
91
92
93    // Implementations for AttributeVisitor.
94
95    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
96
97
98    public void visitInnerClassesAttribute(Clazz clazz, InnerClassesAttribute innerClassesAttribute)
99    {
100        // Make sure the outer class names are kept as well.
101        innerClassesAttribute.innerClassEntriesAccept(clazz, this);
102    }
103
104
105    // Implementations for InnerClassesInfoVisitor.
106
107    public void visitInnerClassesInfo(Clazz clazz, InnerClassesInfo innerClassesInfo)
108    {
109        // Make sure the outer class name is kept as well.
110        int innerClassIndex = innerClassesInfo.u2innerClassIndex;
111        int outerClassIndex = innerClassesInfo.u2outerClassIndex;
112        if (innerClassIndex != 0 &&
113            outerClassIndex != 0 &&
114            clazz.getClassName(innerClassIndex).equals(clazz.getName()))
115        {
116            clazz.constantPoolEntryAccept(outerClassIndex, this);
117        }
118    }
119
120
121    // Implementations for ConstantVisitor.
122
123    public void visitClassConstant(Clazz clazz, ClassConstant classConstant)
124    {
125        // Make sure the outer class name is kept as well.
126        classConstant.referencedClassAccept(this);
127    }
128
129
130    // Small utility method.
131
132    /**
133     * Ensures the name of the given class name will be kept.
134     */
135    public void keepClassName(Clazz clazz)
136    {
137        ClassObfuscator.setNewClassName(clazz,
138                                        clazz.getName());
139    }
140
141
142    /**
143     * Ensures the name of the given field name will be kept.
144     */
145    private void keepFieldName(Clazz clazz, Field field)
146    {
147        MemberObfuscator.setFixedNewMemberName(field,
148                                               field.getName(clazz));
149    }
150
151
152    /**
153     * Ensures the name of the given method name will be kept.
154     */
155    private void keepMethodName(Clazz clazz, Method method)
156    {
157        String name = method.getName(clazz);
158
159        if (!ClassUtil.isInitializer(name))
160        {
161            MemberObfuscator.setFixedNewMemberName(method, name);
162        }
163    }
164}
165