1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2014 Eric Lafortune (eric@graphics.cornell.edu)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard.classfile.visitor;
import proguard.classfile.*;
import proguard.classfile.util.SimplifiedVisitor;
/**
* This <code>MemberVisitor</code> lets a given <code>MemberVisitor</code>
* travel to all concrete and abstract implementations of the visited methods
* in their class hierarchies.
*
* @author Eric Lafortune
*/
public class MethodImplementationTraveler
extends SimplifiedVisitor
implements MemberVisitor
{
private final boolean visitThisMethod;
private final boolean visitSuperMethods;
private final boolean visitInterfaceMethods;
private final boolean visitOverridingMethods;
private final MemberVisitor memberVisitor;
/**
* Creates a new MethodImplementationTraveler.
* @param visitThisMethod specifies whether to visit the originally
* visited methods.
* @param visitSuperMethods specifies whether to visit the method in
* the super classes.
* @param visitInterfaceMethods specifies whether to visit the method in
* the interface classes.
* @param visitOverridingMethods specifies whether to visit the method in
* the subclasses.
* @param memberVisitor the <code>MemberVisitor</code> to which
* visits will be delegated.
*/
public MethodImplementationTraveler(boolean visitThisMethod,
boolean visitSuperMethods,
boolean visitInterfaceMethods,
boolean visitOverridingMethods,
MemberVisitor memberVisitor)
{
this.visitThisMethod = visitThisMethod;
this.visitSuperMethods = visitSuperMethods;
this.visitInterfaceMethods = visitInterfaceMethods;
this.visitOverridingMethods = visitOverridingMethods;
this.memberVisitor = memberVisitor;
}
// Implementations for MemberVisitor.
public void visitProgramMethod(ProgramClass programClass, ProgramMethod programMethod)
{
if (visitThisMethod)
{
programMethod.accept(programClass, memberVisitor);
}
if (!isSpecial(programClass, programMethod))
{
programClass.hierarchyAccept(false,
visitSuperMethods,
visitInterfaceMethods,
visitOverridingMethods,
new NamedMethodVisitor(programMethod.getName(programClass),
programMethod.getDescriptor(programClass),
new MemberAccessFilter(0,
ClassConstants.ACC_PRIVATE |
ClassConstants.ACC_STATIC,
memberVisitor)));
}
}
public void visitLibraryMethod(LibraryClass libraryClass, LibraryMethod libraryMethod)
{
if (visitThisMethod)
{
libraryMethod.accept(libraryClass, memberVisitor);
}
if (!isSpecial(libraryClass, libraryMethod))
{
libraryClass.hierarchyAccept(false,
visitSuperMethods,
visitInterfaceMethods,
visitOverridingMethods,
new NamedMethodVisitor(libraryMethod.getName(libraryClass),
libraryMethod.getDescriptor(libraryClass),
new MemberAccessFilter(0,
ClassConstants.ACC_PRIVATE |
ClassConstants.ACC_STATIC,
memberVisitor)));
}
}
// Small utility methods.
private boolean isSpecial(Clazz clazz, Method method)
{
return (method.getAccessFlags() &
(ClassConstants.ACC_PRIVATE |
ClassConstants.ACC_STATIC)) != 0 ||
method.getName(clazz).equals(ClassConstants.METHOD_NAME_INIT);
}
}
|
