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.android.launcher3.util;
  
  import android.os.Handler;
  import android.os.Looper;
  
  import java.util.List;
  import java.util.concurrent.AbstractExecutorService;
  import java.util.concurrent.TimeUnit;
  
  /**
   * Extension of {@link AbstractExecutorService} which executed on a provided looper.
   */
  public class LooperExecutor extends AbstractExecutorService {
  
      private final Handler mHandler;
  
      public LooperExecutor(Looper looper) {
          mHandler = new Handler(looper);
      }
  
      @Override
      public void execute(Runnable runnable) {
          if (mHandler.getLooper() == Looper.myLooper()) {
              runnable.run();
          } else {
              mHandler.post(runnable);
          }
      }
  
      /**
       * Not supported and throws an exception when used.
       */
      @Override
      @Deprecated
      public void shutdown() {
          throw new UnsupportedOperationException();
      }
  
      /**
       * Not supported and throws an exception when used.
       */
      @Override
      @Deprecated
      public List<Runnable> shutdownNow() {
          throw new UnsupportedOperationException();
      }
  
      @Override
      public boolean isShutdown() {
          return false;
      }
  
      @Override
      public boolean isTerminated() {
          return false;
      }
  
      /**
       * Not supported and throws an exception when used.
       */
      @Override
      @Deprecated
      public boolean awaitTermination(long l, TimeUnit timeUnit) throws InterruptedException {
          throw new UnsupportedOperationException();
      }
  }
  