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/*
* Copyright (C) 2013 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.dialer.binary.common;
import android.app.Application;
import android.os.Trace;
import android.preference.PreferenceManager;
import android.support.annotation.NonNull;
import com.android.dialer.blocking.BlockedNumbersAutoMigrator;
import com.android.dialer.blocking.FilteredNumberAsyncQueryHandler;
import com.android.dialer.inject.HasRootComponent;
/** A common application subclass for all Dialer build variants. */
public abstract class DialerApplication extends Application implements HasRootComponent {
private volatile Object rootComponent;
@Override
public void onCreate() {
Trace.beginSection("DialerApplication.onCreate");
super.onCreate();
new BlockedNumbersAutoMigrator(
this,
PreferenceManager.getDefaultSharedPreferences(this),
new FilteredNumberAsyncQueryHandler(this))
.autoMigrate();
Trace.endSection();
}
/**
* Returns a new instance of the root component for the application. Sub classes should define a
* root component that extends all the sub components "HasComponent" intefaces. The component
* should specify all modules that the application supports and provide stubs for the remainder.
*/
@NonNull
protected abstract Object buildRootComponent();
/** Returns a cached instance of application's root component. */
@Override
@NonNull
public final Object component() {
Object result = rootComponent;
if (result == null) {
synchronized (this) {
result = rootComponent;
if (result == null) {
rootComponent = result = buildRootComponent();
}
}
}
return result;
}
}
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