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Java > Open Source Codes > proguard > classfile > editor > ClassMemberSorter


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 library 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 library 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 Lesser General Public License
15  * for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with this library; if not, write to the Free Software Foundation,
19  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.classfile.editor;
22
23 import proguard.classfile.visitor.ClassVisitor;
24 import proguard.classfile.*;
25
26 import java.util.*;
27
28 /**
29  * This ClassVisitor sorts the class members of the classes that it visits.
30  * The sorting order is based on the access flags, the names, and the
31  * descriptors.
32  *
33  * @author Eric Lafortune
34  */
35 public class ClassMemberSorter implements ClassVisitor, Comparator
36 {
37     // Implementations for ClassVisitor.
38
39     public void visitProgramClass(ProgramClass programClass)
40     {
41         // Sort the fields.
42 Arrays.sort(programClass.fields, 0, programClass.u2fieldsCount, this);
43
44         // Sort the methods.
45 Arrays.sort(programClass.methods, 0, programClass.u2methodsCount, this);
46     }
47
48
49     public void visitLibraryClass(LibraryClass libraryClass)
50     {
51     }
52
53
54     // Implementations for Comparator.
55
56     public int compare(Object JavaDoc object1, Object JavaDoc object2)
57     {
58         ProgramMember member1 = (ProgramMember)object1;
59         ProgramMember member2 = (ProgramMember)object2;
60
61         return member1.u2accessFlags < member2.u2accessFlags ? -1 :
62                member1.u2accessFlags > member2.u2accessFlags ? 1 :
63                member1.u2nameIndex < member2.u2nameIndex ? -1 :
64                member1.u2nameIndex > member2.u2nameIndex ? 1 :
65                member1.u2descriptorIndex < member2.u2descriptorIndex ? -1 :
66                member1.u2descriptorIndex > member2.u2descriptorIndex ? 1 :
67                                                                         0;
68     }
69 }
70
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