MemberToClassVisitor.java revision 8a6199f0c36a778f22394364347a301b0b28e94b 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2013 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.classfile.visitor;
22
23import proguard.classfile.*;
24
25
26/**
27 * This MemberVisitor delegates all visits to a given ClassVisitor.
28 * The latter visits the class of each visited class member, although
29 * never twice in a row.
30 *
31 * @author Eric Lafortune
32 */
33public class MemberToClassVisitor implements MemberVisitor
34{
35    private final ClassVisitor classVisitor;
36
37    private Clazz lastVisitedClass;
38
39
40    public MemberToClassVisitor(ClassVisitor classVisitor)
41    {
42        this.classVisitor = classVisitor;
43    }
44
45
46    // Implementations for MemberVisitor.
47
48    public void visitProgramField(ProgramClass programClass, ProgramField programField)
49    {
50        if (!programClass.equals(lastVisitedClass))
51        {
52            classVisitor.visitProgramClass(programClass);
53
54            lastVisitedClass = programClass;
55        }
56    }
57
58
59    public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
60    {
61        if (!programClass.equals(lastVisitedClass))
62        {
63            classVisitor.visitProgramClass(programClass);
64
65            lastVisitedClass = programClass;
66        }
67    }
68
69
70    public void visitLibraryField(LibraryClass libraryClass, LibraryField libraryField)
71    {
72        if (!libraryClass.equals(lastVisitedClass))
73        {
74            classVisitor.visitLibraryClass(libraryClass);
75
76            lastVisitedClass = libraryClass;
77        }
78    }
79
80
81    public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
82    {
83        if (!libraryClass.equals(lastVisitedClass))
84        {
85            classVisitor.visitLibraryClass(libraryClass);
86
87            lastVisitedClass = libraryClass;
88        }
89    }
90}
91