content: /*
   * Copyright (C) 2017 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.google.android.exoplayer2.scheduler;
  
  import android.app.Notification;
  import android.app.Service;
  import android.content.Intent;
  
  /** Schedules a service to be started in the foreground when some {@link Requirements} are met. */
  public interface Scheduler {
  
    /**
     * Schedules a service to be started in the foreground when some {@link Requirements} are met.
     * Anything that was previously scheduled will be canceled.
     *
     * <p>The service to be started must be declared in the manifest of {@code servicePackage} with an
     * intent filter containing {@code serviceAction}. Note that when started with {@code
     * serviceAction}, the service must call {@link Service#startForeground(int, Notification)} to
     * make itself a foreground service, as documented by {@link
     * Service#startForegroundService(Intent)}.
     *
     * @param requirements The requirements.
     * @param servicePackage The package name.
     * @param serviceAction The action with which the service will be started.
     * @return Whether scheduling was successful.
     */
    boolean schedule(Requirements requirements, String servicePackage, String serviceAction);
  
    /**
     * Cancels anything that was previously scheduled, or else does nothing.
     *
     * @return Whether cancellation was successful.
     */
    boolean cancel();
  
    /**
     * Checks whether this {@link Scheduler} supports the provided {@link Requirements}. If all of the
     * requirements are supported then the same {@link Requirements} instance is returned. If not then
     * a new instance is returned containing the subset of the requirements that are supported.
     *
     * @param requirements The requirements to check.
     * @return The supported requirements.
     */
    Requirements getSupportedRequirements(Requirements requirements);
  }
  