/*
 * Copyright (C) 2009 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.backup;

import android.content.Context;
import android.os.RemoteException;
import android.os.ServiceManager;

/**
 * BackupManager is the interface to the system's backup service.
 * Applications simply instantiate one, and then use that instance
 * to communicate with the backup infrastructure.
 *
 * <p>When your application has made changes to data it wishes to have
 * backed up, call {@link #dataChanged()} to notify the backup service.
 * The system will then schedule a backup operation to occur in the near
 * future.  Repeated calls to {@link #dataChanged()} have no further effect
 * until the backup operation actually occurs.
 *
 * <p>The backup operation itself begins with the system launching the
 * {@link BackupService} subclass declared in your manifest.  See the documentation
 * for {@link BackupService} for a detailed description of how the backup then proceeds.
 *
 * @hide pending API solidification
 */
public class BackupManager {
    private Context mContext;
    private IBackupManager mService;

    /**
     * Constructs a BackupManager object through which the application can
     * communicate with the Android backup system.
     *
     * @param context The {@link android.content.Context} that was provided when
     *                one of your application's {@link android.app.Activity Activities}
     *                was created.
     */
    public BackupManager(Context context) {
        mContext = context;
        mService = IBackupManager.Stub.asInterface(
                ServiceManager.getService(Context.BACKUP_SERVICE));
    }

    /**
     * Notifies the Android backup system that your application wishes to back up
     * new changes to its data.  A backup operation using your application's
     * {@link BackupService} subclass will be scheduled when you call this method.
     */
    public void dataChanged() {
        try {
            mService.dataChanged(mContext.getPackageName());
        } catch (RemoteException e) {
        }
    }
}