1/*
2 * Copyright 2015, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.analysis;
33
34import org.jf.dexlib2.AccessFlags;
35import org.jf.dexlib2.analysis.util.TypeProtoUtils;
36import org.jf.dexlib2.iface.ClassDef;
37import org.jf.dexlib2.iface.Method;
38import org.jf.dexlib2.util.MethodUtil;
39import org.jf.dexlib2.util.TypeUtils;
40
41import javax.annotation.Nonnull;
42
43public class AnalyzedMethodUtil {
44    public static boolean canAccess(@Nonnull TypeProto type, @Nonnull Method virtualMethod, boolean checkPackagePrivate,
45                                    boolean checkProtected, boolean checkClass) {
46        if (checkPackagePrivate && MethodUtil.isPackagePrivate(virtualMethod)) {
47            String otherPackage = TypeUtils.getPackage(virtualMethod.getDefiningClass());
48            String thisPackage = TypeUtils.getPackage(type.getType());
49            if (!otherPackage.equals(thisPackage)) {
50                return false;
51            }
52        }
53
54        if (checkProtected && (virtualMethod.getAccessFlags() & AccessFlags.PROTECTED.getValue()) != 0) {
55            if (!TypeProtoUtils.extendsFrom(type, virtualMethod.getDefiningClass())) {
56                return false;
57            }
58        }
59
60        if (checkClass) {
61            ClassPath classPath = type.getClassPath();
62            ClassDef methodClassDef = classPath.getClassDef(virtualMethod.getDefiningClass());
63            if (!TypeUtils.canAccessClass(type.getType(), methodClassDef)) {
64                return false;
65            }
66        }
67
68        return true;
69    }
70}
71