/*
    * Copyright 2013 The Netty Project
    *
    * The Netty Project licenses this file to you 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 io.netty.util.concurrent;
  
  import java.util.concurrent.TimeUnit;
  
  /**
   * A skeletal {@link Future} implementation which represents a {@link Future} which has been completed already.
   */
  public abstract class CompleteFuture<V> extends AbstractFuture<V> {
  
      private final EventExecutor executor;
  
      /**
       * Creates a new instance.
       *
       * @param executor the {@link EventExecutor} associated with this future
       */
      protected CompleteFuture(EventExecutor executor) {
          this.executor = executor;
      }
  
      /**
       * Return the {@link EventExecutor} which is used by this {@link CompleteFuture}.
       */
      protected EventExecutor executor() {
          return executor;
      }
  
      @Override
      public Future<V> addListener(GenericFutureListener<? extends Future<? super V>> listener) {
          if (listener == null) {
              throw new NullPointerException("listener");
          }
          DefaultPromise.notifyListener(executor(), this, listener);
          return this;
      }
  
      @Override
      public Future<V> addListeners(GenericFutureListener<? extends Future<? super V>>... listeners) {
          if (listeners == null) {
              throw new NullPointerException("listeners");
          }
          for (GenericFutureListener<? extends Future<? super V>> l: listeners) {
              if (l == null) {
                  break;
              }
              DefaultPromise.notifyListener(executor(), this, l);
          }
          return this;
      }
  
      @Override
      public Future<V> removeListener(GenericFutureListener<? extends Future<? super V>> listener) {
          // NOOP
          return this;
      }
  
      @Override
      public Future<V> removeListeners(GenericFutureListener<? extends Future<? super V>>... listeners) {
          // NOOP
          return this;
      }
  
      @Override
      public Future<V> await() throws InterruptedException {
          if (Thread.interrupted()) {
              throw new InterruptedException();
          }
          return this;
      }
  
      @Override
      public boolean await(long timeout, TimeUnit unit) throws InterruptedException {
          if (Thread.interrupted()) {
              throw new InterruptedException();
          }
          return true;
      }
  
      @Override
      public Future<V> sync() throws InterruptedException {
          return this;
      }
  
     @Override
     public Future<V> syncUninterruptibly() {
         return this;
     }
 
     @Override
     public boolean await(long timeoutMillis) throws InterruptedException {
         if (Thread.interrupted()) {
             throw new InterruptedException();
         }
         return true;
     }
 
     @Override
     public Future<V> awaitUninterruptibly() {
         return this;
     }
 
     @Override
     public boolean awaitUninterruptibly(long timeout, TimeUnit unit) {
         return true;
     }
 
     @Override
     public boolean awaitUninterruptibly(long timeoutMillis) {
         return true;
     }
 
     @Override
     public boolean isDone() {
         return true;
     }
 
     @Override
     public boolean isCancellable() {
         return false;
     }
 
     @Override
     public boolean isCancelled() {
         return false;
     }
 
     /**
      * {@inheritDoc}
      *
      * @param mayInterruptIfRunning this value has no effect in this implementation.
      */
     @Override
     public boolean cancel(boolean mayInterruptIfRunning) {
         return false;
     }
 }