1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2014 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;
22
23import proguard.classfile.util.*;
24
25import java.util.List;
26
27/**
28 * This class checks if the user is specifying to assume no side effects
29 * for a reasonable number of methods in a class: not none and not all.
30 *
31 * @author Eric Lafortune
32 */
33public class AssumeNoSideEffectsChecker
34{
35    private final WarningPrinter notePrinter;
36
37
38    /**
39     * Creates a new KeepClassMemberChecker.
40     */
41    public AssumeNoSideEffectsChecker(WarningPrinter notePrinter)
42    {
43        this.notePrinter = notePrinter;
44    }
45
46
47    /**
48     * Checks if the given class specifications try to assume no side effects
49     * for all methods in a class, printing notes if necessary.
50     */
51    public void checkClassSpecifications(List classSpecifications)
52    {
53        if (classSpecifications != null)
54        {
55            for (int classSpecificationIndex = 0;
56                 classSpecificationIndex < classSpecifications.size();
57                 classSpecificationIndex++)
58            {
59                ClassSpecification classSpecification =
60                    (ClassSpecification)classSpecifications.get(classSpecificationIndex);
61
62                String className = classSpecification.className;
63                if (className == null)
64                {
65                    className = classSpecification.extendsClassName;
66                }
67
68                if (className == null ||
69                    notePrinter.accepts(className))
70                {
71                    List methodSpecifications =
72                        classSpecification.methodSpecifications;
73
74                    if (methodSpecifications != null)
75                    {
76                        for (int methodSpecificationIndex = 0;
77                             methodSpecificationIndex < methodSpecifications.size();
78                             methodSpecificationIndex++)
79                        {
80                            final MemberSpecification methodSpecification =
81                                (MemberSpecification)methodSpecifications.get(methodSpecificationIndex);
82
83                            if (methodSpecification.name       == null &&
84                                methodSpecification.descriptor == null)
85                            {
86                                notePrinter.print(className,
87                                                  "Note: the configuration specifies that none of the methods of class '" +
88                                                  (className == null ?
89                                                       ConfigurationConstants.ANY_CLASS_KEYWORD :
90                                                       ClassUtil.externalClassName(className)) + "' have any side effects");
91                            }
92                        }
93                    }
94                }
95            }
96        }
97    }
98}
99