1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.internal.os;
18
19import android.os.Trace;
20
21import dalvik.system.PathClassLoader;
22
23/**
24 * Creates path class loaders.
25 *
26 * @hide
27 */
28public class PathClassLoaderFactory {
29    // Unconstructable
30    private PathClassLoaderFactory() {}
31
32    /**
33     * Create a PathClassLoader and initialize a linker-namespace for it.
34     *
35     * @hide
36     */
37    public static PathClassLoader createClassLoader(String dexPath,
38                                                    String librarySearchPath,
39                                                    String libraryPermittedPath,
40                                                    ClassLoader parent,
41                                                    int targetSdkVersion,
42                                                    boolean isNamespaceShared) {
43        PathClassLoader pathClassloader = new PathClassLoader(dexPath, librarySearchPath, parent);
44
45        Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "createClassloaderNamespace");
46        String errorMessage = createClassloaderNamespace(pathClassloader,
47                                                         targetSdkVersion,
48                                                         librarySearchPath,
49                                                         libraryPermittedPath,
50                                                         isNamespaceShared);
51        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
52
53        if (errorMessage != null) {
54            throw new UnsatisfiedLinkError("Unable to create namespace for the classloader " +
55                                           pathClassloader + ": " + errorMessage);
56        }
57
58        return pathClassloader;
59    }
60
61    private static native String createClassloaderNamespace(ClassLoader classLoader,
62                                                            int targetSdkVersion,
63                                                            String librarySearchPath,
64                                                            String libraryPermittedPath,
65                                                            boolean isNamespaceShared);
66}
67