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 android.os;
  
  import android.annotation.NonNull;
  
  import com.android.internal.util.Preconditions;
  
  import java.util.concurrent.Executor;
  import java.util.concurrent.RejectedExecutionException;
  
  /**
   * An adapter {@link Executor} that posts all executed tasks onto the given
   * {@link Handler}.
   *
   * @hide
   */
  public class HandlerExecutor implements Executor {
      private final Handler mHandler;
  
      public HandlerExecutor(@NonNull Handler handler) {
          mHandler = Preconditions.checkNotNull(handler);
      }
  
      @Override
      public void execute(Runnable command) {
          if (!mHandler.post(command)) {
              throw new RejectedExecutionException(mHandler + " is shutting down");
          }
      }
  }
  