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/*
* Copyright (C) 2008 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.
*/
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
/**
* Policy that governs which classes are preloaded.
*/
public class Policy {
/**
* No constructor - use static methods only
*/
private Policy() {}
/**
* This location (in the build system) of the preloaded-classes file.
*/
static final String PRELOADED_CLASS_FILE
= "frameworks/base/preloaded-classes";
/**
* Long running services. These are restricted in their contribution to the
* preloader because their launch time is less critical.
*/
// TODO: Generate this automatically from package manager.
private static final Set<String> SERVICES = new HashSet<String>(Arrays.asList(
"system_server",
"com.google.process.content",
"android.process.media",
"com.android.bluetooth",
"com.android.calendar",
"com.android.inputmethod.latin",
"com.android.phone",
"com.google.android.apps.maps.FriendService", // pre froyo
"com.google.android.apps.maps:FriendService", // froyo
"com.google.android.apps.maps.LocationFriendService",
"com.google.android.deskclock",
"com.google.process.gapps",
"android.tts"
));
/**
* Classes which we shouldn't load from the Zygote.
*/
private static final Set<String> EXCLUDED_CLASSES
= new HashSet<String>(Arrays.asList(
// Binders
"android.app.AlarmManager",
"android.app.SearchManager",
"android.os.FileObserver",
"com.android.server.PackageManagerService$AppDirObserver",
// Threads
"android.os.AsyncTask",
"android.pim.ContactsAsyncHelper",
"android.webkit.WebViewClassic$1",
"java.lang.ProcessManager"
));
/**
* Returns true if the given process name is a "long running" process or
* service.
*/
public static boolean isService(String processName) {
return SERVICES.contains(processName);
}
/** Reports if the given class should be preloaded. */
public static boolean isPreloadable(LoadedClass clazz) {
return clazz.systemClass && !EXCLUDED_CLASSES.contains(clazz.name)
&& !clazz.name.endsWith("$NoPreloadHolder");
}
}
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