KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > proguard > obfuscate > MappingPrinter


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 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  */
21 package proguard.obfuscate;
22
23 import proguard.classfile.*;
24 import proguard.classfile.util.*;
25 import proguard.classfile.visitor.*;
26
27 import java.io.*;
28
29
30 /**
31  * This ClassVisitor prints out the renamed classes and class members with
32  * their old names and new names.
33  *
34  * @see ClassRenamer
35  *
36  * @author Eric Lafortune
37  */
38 public class MappingPrinter
39 extends SimplifiedVisitor
40 implements ClassVisitor,
41              MemberVisitor
42 {
43     private PrintStream ps;
44
45
46     /**
47      * Creates a new MappingPrinter that prints to <code>System.out</code>.
48      */
49     public MappingPrinter()
50     {
51         this(System.out);
52     }
53
54
55     /**
56      * Creates a new MappingPrinter that prints to the given stream.
57      * @param printStream the stream to which to print
58      */
59     public MappingPrinter(PrintStream printStream)
60     {
61         this.ps = printStream;
62     }
63
64
65     // Implementations for ClassVisitor.
66
67     public void visitProgramClass(ProgramClass programClass)
68     {
69         String JavaDoc name = programClass.getName();
70         String JavaDoc newName = ClassObfuscator.newClassName(programClass);
71
72         ps.println(ClassUtil.externalClassName(name) +
73                    " -> " +
74                    ClassUtil.externalClassName(newName) +
75                    ":");
76
77         // Print out the class members.
78 programClass.fieldsAccept(this);
79         programClass.methodsAccept(this);
80     }
81
82
83     public void visitLibraryClass(LibraryClass libraryClass)
84     {
85     }
86
87
88     // Implementations for MemberVisitor.
89
90     public void visitProgramField(ProgramClass programClass, ProgramField programField)
91     {
92         String JavaDoc newName = MemberObfuscator.newMemberName(programField);
93         if (newName != null)
94         {
95             ps.println(" " +
96                        //lineNumberRange(programClass, programField) +
97 ClassUtil.externalFullFieldDescription(
98                            0,
99                            programField.getName(programClass),
100                            programField.getDescriptor(programClass)) +
101                        " -> " +
102                        newName);
103         }
104     }
105
106
107     public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
108     {
109         // Special cases: <clinit> and <init> are always kept unchanged.
110 // We can ignore them here.
111 String JavaDoc name = programMethod.getName(programClass);
112         if (name.equals(ClassConstants.INTERNAL_METHOD_NAME_CLINIT) ||
113             name.equals(ClassConstants.INTERNAL_METHOD_NAME_INIT))
114         {
115             return;
116         }
117
118         String JavaDoc newName = MemberObfuscator.newMemberName(programMethod);
119         if (newName != null)
120         {
121             ps.println(" " +
122                        lineNumberRange(programClass, programMethod) +
123                        ClassUtil.externalFullMethodDescription(
124                            programClass.getName(),
125                            0,
126                            programMethod.getName(programClass),
127                            programMethod.getDescriptor(programClass)) +
128                        " -> " +
129                        newName);
130         }
131     }
132
133
134     // Small utility methods.
135
136     /**
137      * Returns the line number range of the given class member, followed by a
138      * colon, or just an empty String if no range is available.
139      */
140     private static String JavaDoc lineNumberRange(ProgramClass programClass, ProgramMember programMember)
141     {
142         String JavaDoc range = programMember.getLineNumberRange(programClass);
143         return range != null ?
144             (range + ":") :
145             "";
146     }
147 }
148
Popular Tags