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
|
/*
* 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.optimize.evaluation;
import proguard.classfile.*;
import proguard.classfile.visitor.*;
import proguard.optimize.info.SimpleEnumMarker;
/**
* This ClassVisitor marks all program classes that it visits as simple enums,
* if their methods qualify.
*
* @author Eric Lafortune
*/
public class SimpleEnumClassChecker
implements ClassVisitor
{
//*
private static final boolean DEBUG = false;
/*/
private static boolean DEBUG = System.getProperty("enum") != null;
//*/
private final SimpleEnumMarker simpleEnumMarker = new SimpleEnumMarker(true);
private final MemberVisitor virtualMethodChecker = new MemberAccessFilter(0,
ClassConstants.ACC_PRIVATE |
ClassConstants.ACC_STATIC,
new MemberToClassVisitor(
new SimpleEnumMarker(false)));
// Implementations for ClassVisitor.
public void visitLibraryClass(LibraryClass libraryClass) {}
public void visitProgramClass(ProgramClass programClass)
{
// Does the class have the simple enum constructor?
if (programClass.findMethod(ClassConstants.METHOD_NAME_INIT,
ClassConstants.METHOD_TYPE_INIT_ENUM) != null)
{
if (DEBUG)
{
System.out.println("SimpleEnumClassChecker: ["+programClass.getName()+"] is a candidate simple enum, without extra fields");
}
// Mark it.
simpleEnumMarker.visitProgramClass(programClass);
// However, unmark it again if it has any non-private, non-static
// methods.
programClass.methodsAccept(virtualMethodChecker);
}
}
}
|
