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/*
* Copyright (C) 2017 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 android.media.update;
import android.app.ActivityManager;
import android.app.AppGlobals;
import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.RemoteException;
import android.os.UserHandle;
import com.android.internal.annotations.GuardedBy;
import dalvik.system.PathClassLoader;
import java.io.File;
/**
* @hide
*/
public final class ApiLoader {
@GuardedBy("this")
private static StaticProvider sMediaUpdatable;
private static final String UPDATE_PACKAGE = "com.android.media.update";
private static final String UPDATE_CLASS = "com.android.media.update.ApiFactory";
private static final String UPDATE_METHOD = "initialize";
private static final boolean REGISTER_UPDATE_DEPENDENCY = true;
private ApiLoader() { }
public static StaticProvider getProvider() {
if (sMediaUpdatable != null) return sMediaUpdatable;
try {
return getMediaUpdatable();
} catch (RemoteException e) {
throw e.rethrowFromSystemServer();
} catch (NameNotFoundException | ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
// TODO This method may do I/O; Ensure it does not violate (emit warnings in) strict mode.
private static synchronized StaticProvider getMediaUpdatable()
throws NameNotFoundException, ReflectiveOperationException, RemoteException {
if (sMediaUpdatable != null) return sMediaUpdatable;
// TODO Figure out when to use which package (query media update service)
int flags = Build.IS_DEBUGGABLE ? 0 : PackageManager.MATCH_FACTORY_ONLY;
flags |= PackageManager.GET_SHARED_LIBRARY_FILES;
ApplicationInfo ai = AppGlobals.getPackageManager().getApplicationInfo(
UPDATE_PACKAGE, flags, UserHandle.myUserId());
if (REGISTER_UPDATE_DEPENDENCY) {
// Register a dependency to the updatable in order to be killed during updates
ActivityManager.getService().addPackageDependency(ai.packageName);
}
ClassLoader classLoader = new PathClassLoader(ai.sourceDir,
ai.nativeLibraryDir + File.pathSeparator + System.getProperty("java.library.path"),
ClassLoader.getSystemClassLoader().getParent());
return sMediaUpdatable = (StaticProvider) classLoader.loadClass(UPDATE_CLASS)
.getMethod(UPDATE_METHOD, ApplicationInfo.class).invoke(null, ai);
}
}
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