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/*
* Copyright (C) 2013 The CyanogenMod 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.server;
import android.content.Context;
import android.content.ContextWrapper;
import android.content.res.Resources;
import android.os.Binder;
import android.util.Log;
import com.android.internal.os.DeviceDockBatteryHandler;
import com.android.internal.os.DeviceKeyHandler;
import com.android.internal.os.IDeviceHandler;
import dalvik.system.DexClassLoader;
import java.lang.reflect.Constructor;
/**
* DeviceHandlerService exposed device specific handlers to other services.
* All specific device, not implemented by aosp, should be included here.
* @see DeviceKeyHandler
* @see DeviceDockBatteryHandler
* @hide
*/
public final class DeviceHandlerService extends Binder implements IDeviceHandler {
private static final String TAG = DeviceHandlerService.class.getSimpleName();
private static final boolean DEBUG = true;
private final Context mContext;
private DeviceKeyHandler mDeviceKeyHandler = null;
private DeviceDockBatteryHandler mDeviceDockBatteryHandler = null;
public DeviceHandlerService(Context context) {
mContext = context;
registerHandlers();
}
private void registerHandlers() {
// For register device specific handlers at least a library with the
// implementations is required.
Resources res = mContext.getResources();
String deviceHandlersLib =
res.getString(
com.android.internal.R.string.config_deviceHandlersLib);
if (deviceHandlersLib.isEmpty()) {
Log.i(TAG, "No device specific handler lib was defined.");
return;
}
ClassLoader classLoader =
new DexClassLoader(
deviceHandlersLib,
new ContextWrapper(mContext).getCacheDir().getAbsolutePath(),
null,
ClassLoader.getSystemClassLoader());
// ------------------
// DeviceKeyHandler
// ------------------
String handlerClass =
res.getString(com.android.internal.R.string.config_deviceKeyHandlerClass);
if (!handlerClass.isEmpty()) {
mDeviceKeyHandler = (DeviceKeyHandler)getHandler(classLoader, "key", handlerClass);
}
// ------------------
// DeviceDockBatteryHandler
// ------------------
// Has dock battery? and device specific handler?
boolean hasDockBattery = res.getBoolean(com.android.internal.R.bool.config_hasDockBattery);
if (hasDockBattery) {
handlerClass =
res.getString(
com.android.internal.R.string.config_deviceDockBatteryHandlerClass);
if (!handlerClass.isEmpty()) {
mDeviceDockBatteryHandler =
(DeviceDockBatteryHandler)getHandler(
classLoader, "dock battery", handlerClass);
}
}
}
private Object getHandler(final ClassLoader classLoader,
final String type, final String handlerClass) {
try {
Class<?> clazz = classLoader.loadClass(handlerClass);
Constructor<?> constructor = clazz.getConstructor(Context.class);
Object handler = constructor.newInstance(mContext);
if(DEBUG) {
Log.d(TAG, String.format("Instantiated %s handler class %s", type, handlerClass));
}
return handler;
} catch (Exception e) {
Log.w(TAG,
String.format(
"Could not instantiate %s handler class %s", type, handlerClass), e);
}
return null;
}
public DeviceKeyHandler getDeviceKeyHandler() {
return mDeviceKeyHandler;
}
public DeviceDockBatteryHandler getDeviceDockBatteryHandler() {
return mDeviceDockBatteryHandler;
}
}
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