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.util;
  
  import android.os.Handler;
  import android.os.Looper;
  import android.os.Message;
  
  /**
   * An interface to call through to a {@link Handler}. Instances must be created by calling {@link
   * Clock#createHandler(Looper, Handler.Callback)} on {@link Clock#DEFAULT} for all non-test cases.
   */
  public interface HandlerWrapper {
  
    /** @see Handler#getLooper() */
    Looper getLooper();
  
    /** @see Handler#obtainMessage(int) */
    Message obtainMessage(int what);
  
    /** @see Handler#obtainMessage(int, Object) */
    Message obtainMessage(int what, Object obj);
  
    /** @see Handler#obtainMessage(int, int, int) */
    Message obtainMessage(int what, int arg1, int arg2);
  
    /** @see Handler#obtainMessage(int, int, int, Object) */
    Message obtainMessage(int what, int arg1, int arg2, Object obj);
  
    /** @see Handler#sendEmptyMessage(int) */
    boolean sendEmptyMessage(int what);
  
    /** @see Handler#sendEmptyMessageAtTime(int, long) */
    boolean sendEmptyMessageAtTime(int what, long uptimeMs);
  
    /** @see Handler#removeMessages(int) */
    void removeMessages(int what);
  
    /** @see Handler#removeCallbacksAndMessages(Object) */
    void removeCallbacksAndMessages(Object token);
  
    /** @see Handler#post(Runnable) */
    boolean post(Runnable runnable);
  
    /** @see Handler#postDelayed(Runnable, long) */
    boolean postDelayed(Runnable runnable, long delayMs);
  }
  