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.optimize.info;
22
23import proguard.classfile.*;
24import proguard.classfile.util.SimplifiedVisitor;
25import proguard.classfile.visitor.*;
26
27/**
28 * This ClassVisitor marks all classes that contain static initializers.
29 *
30 * @author Eric Lafortune
31 */
32public class StaticInitializerContainingClassMarker
33extends      SimplifiedVisitor
34implements   ClassVisitor
35{
36    // Implementations for ClassVisitor.
37
38    public void visitAnyClass(Clazz clazz)
39    {
40        if (clazz.findMethod(ClassConstants.INTERNAL_METHOD_NAME_CLINIT,
41                             ClassConstants.INTERNAL_METHOD_TYPE_CLINIT) != null)
42        {
43            setStaticInitializer(clazz);
44        }
45    }
46
47
48    // Small utility methods.
49
50    private static void setStaticInitializer(Clazz clazz)
51    {
52        ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
53        if (info != null)
54        {
55            info.setContainsStaticInitializer();
56        }
57    }
58
59
60    public static boolean containsStaticInitializer(Clazz clazz)
61    {
62        ClassOptimizationInfo info = ClassOptimizationInfo.getClassOptimizationInfo(clazz);
63        return info == null || info.containsStaticInitializer();
64    }
65}