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/*
* 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.packageinstaller;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.support.annotation.NonNull;
/**
* Receives install events and perists them using a {@link EventResultPersister}.
*/
public class InstallEventReceiver extends BroadcastReceiver {
private static final Object sLock = new Object();
private static EventResultPersister sReceiver;
/**
* Get the event receiver persisting the results
*
* @return The event receiver.
*/
@NonNull private static EventResultPersister getReceiver(@NonNull Context context) {
synchronized (sLock) {
if (sReceiver == null) {
sReceiver = new EventResultPersister(
TemporaryFileManager.getInstallStateFile(context));
}
}
return sReceiver;
}
@Override
public void onReceive(Context context, Intent intent) {
getReceiver(context).onEventReceived(context, intent);
}
/**
* Add an observer. If there is already an event for this id, call back inside of this call.
*
* @param context A context of the current app
* @param id The id the observer is for or {@code GENERATE_NEW_ID} to generate a new one.
* @param observer The observer to call back.
*
* @return The id for this event
*/
static int addObserver(@NonNull Context context, int id,
@NonNull EventResultPersister.EventResultObserver observer)
throws EventResultPersister.OutOfIdsException {
return getReceiver(context).addObserver(id, observer);
}
/**
* Remove a observer.
*
* @param context A context of the current app
* @param id The id the observer was added for
*/
static void removeObserver(@NonNull Context context, int id) {
getReceiver(context).removeObserver(id);
}
}
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