1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2009 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.attribute.visitor;
22
23import proguard.classfile.*;
24import proguard.classfile.attribute.*;
25import proguard.classfile.util.SimplifiedVisitor;
26import proguard.classfile.visitor.*;
27
28/**
29 * This ClassVisitor, MemberVisitor, and AttributeVisitor lets a given
30 * AttributeVisitor visit all Attribute objects of the program classes,
31 * program class members, or code attributes, respectively, that it visits.
32 *
33 * @author Eric Lafortune
34 */
35public class AllAttributeVisitor
36extends      SimplifiedVisitor
37implements   ClassVisitor,
38             MemberVisitor,
39             AttributeVisitor
40{
41    private final boolean          deep;
42    private final AttributeVisitor attributeVisitor;
43
44
45    /**
46     * Creates a new shallow AllAttributeVisitor.
47     * @param attributeVisitor the AttributeVisitor to which visits will be
48     *                         delegated.
49     */
50    public AllAttributeVisitor(AttributeVisitor attributeVisitor)
51    {
52        this(false, attributeVisitor);
53    }
54
55
56    /**
57     * Creates a new optionally deep AllAttributeVisitor.
58     * @param deep             specifies whether the attributes contained
59     *                         further down the class structure should be
60     *                         visited too.
61     * @param attributeVisitor the AttributeVisitor to which visits will be
62     *                         delegated.
63     */
64    public AllAttributeVisitor(boolean          deep,
65                               AttributeVisitor attributeVisitor)
66    {
67        this.deep             = deep;
68        this.attributeVisitor = attributeVisitor;
69    }
70
71
72    // Implementations for ClassVisitor.
73
74    public void visitProgramClass(ProgramClass programClass)
75    {
76        programClass.attributesAccept(attributeVisitor);
77
78        // Visit the attributes further down the class structure, if required.
79        if (deep)
80        {
81            programClass.fieldsAccept(this);
82            programClass.methodsAccept(this);
83            programClass.attributesAccept(this);
84        }
85    }
86
87
88    public void visitLibraryClass(LibraryClass libraryClass) {}
89
90
91    // Implementations for MemberVisitor.
92
93    public void visitProgramMember(ProgramClass programClass, ProgramMember programMember)
94    {
95        programMember.attributesAccept(programClass, attributeVisitor);
96
97        // Visit the attributes further down the member structure, if required.
98        if (deep)
99        {
100            programMember.attributesAccept(programClass, this);
101        }
102    }
103
104
105    public void visitLibraryMember(LibraryClass programClass, LibraryMember programMember) {}
106
107
108    // Implementations for AttributeVisitor.
109
110    public void visitAnyAttribute(Clazz clazz, Attribute attribute) {}
111
112
113    public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute)
114    {
115        codeAttribute.attributesAccept(clazz, method, attributeVisitor);
116    }
117}
118