| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.internal.os; |
| |
| import android.os.Trace; |
| |
| import dalvik.system.DelegateLastClassLoader; |
| import dalvik.system.PathClassLoader; |
| |
| /** |
| * Creates class loaders. |
| * |
| * @hide |
| */ |
| public class ClassLoaderFactory { |
| // Unconstructable |
| private ClassLoaderFactory() {} |
| |
| private static final String PATH_CLASS_LOADER_NAME = PathClassLoader.class.getName(); |
| private static final String DELEGATE_LAST_CLASS_LOADER_NAME = |
| DelegateLastClassLoader.class.getName(); |
| |
| /** |
| * Returns true if {@code name} is a supported classloader. {@code name} must be a |
| * binary name of a class, as defined by {@code Class.getName}. |
| */ |
| public static boolean isValidClassLoaderName(String name) { |
| // This method is used to parse package data and does not accept null names. |
| return name != null && (isPathClassLoaderName(name) || isDelegateLastClassLoaderName(name)); |
| } |
| |
| /** |
| * Returns true if {@code name} is the encoding for the PathClassLoader. |
| */ |
| public static boolean isPathClassLoaderName(String name) { |
| // For null values we default to PathClassLoader. This cover the case when packages |
| // don't specify any value for their class loaders. |
| return name == null || PATH_CLASS_LOADER_NAME.equals(name); |
| } |
| |
| /** |
| * Returns true if {@code name} is the encoding for the DelegateLastClassLoader. |
| */ |
| public static boolean isDelegateLastClassLoaderName(String name) { |
| return DELEGATE_LAST_CLASS_LOADER_NAME.equals(name); |
| } |
| |
| /** |
| * Same as {@code createClassLoader} below, except that no associated namespace |
| * is created. |
| */ |
| public static ClassLoader createClassLoader(String dexPath, |
| String librarySearchPath, ClassLoader parent, String classloaderName) { |
| if (isPathClassLoaderName(classloaderName)) { |
| return new PathClassLoader(dexPath, librarySearchPath, parent); |
| } else if (isPathClassLoaderName(classloaderName)) { |
| return new DelegateLastClassLoader(dexPath, librarySearchPath, parent); |
| } |
| |
| throw new AssertionError("Invalid classLoaderName: " + classloaderName); |
| } |
| |
| /** |
| * Create a ClassLoader and initialize a linker-namespace for it. |
| */ |
| public static ClassLoader createClassLoader(String dexPath, |
| String librarySearchPath, String libraryPermittedPath, ClassLoader parent, |
| int targetSdkVersion, boolean isNamespaceShared, String classloaderName) { |
| |
| final ClassLoader classLoader = createClassLoader(dexPath, librarySearchPath, parent, |
| classloaderName); |
| |
| Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, "createClassloaderNamespace"); |
| String errorMessage = createClassloaderNamespace(classLoader, |
| targetSdkVersion, |
| librarySearchPath, |
| libraryPermittedPath, |
| isNamespaceShared); |
| Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER); |
| |
| if (errorMessage != null) { |
| throw new UnsatisfiedLinkError("Unable to create namespace for the classloader " + |
| classLoader + ": " + errorMessage); |
| } |
| |
| return classLoader; |
| } |
| |
| private static native String createClassloaderNamespace(ClassLoader classLoader, |
| int targetSdkVersion, |
| String librarySearchPath, |
| String libraryPermittedPath, |
| boolean isNamespaceShared); |
| } |