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   /*
    * 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:
    *
    *   https://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.channel;
  
  import io.netty.util.concurrent.Future;
  import io.netty.util.concurrent.GenericFutureListener;
  import io.netty.util.concurrent.ProgressiveFuture;
  
  /**
   * An special {@link ChannelFuture} which is used to indicate the {@link FileRegion} transfer progress
   */
  public interface ChannelProgressiveFuture extends ChannelFuture, ProgressiveFuture<Void> {
      @Override
      ChannelProgressiveFuture addListener(GenericFutureListener<? extends Future<? super Void>> listener);
  
      @Override
      ChannelProgressiveFuture addListeners(GenericFutureListener<? extends Future<? super Void>>... listeners);
  
      @Override
      ChannelProgressiveFuture removeListener(GenericFutureListener<? extends Future<? super Void>> listener);
  
      @Override
      ChannelProgressiveFuture removeListeners(GenericFutureListener<? extends Future<? super Void>>... listeners);
  
      @Override
      ChannelProgressiveFuture sync() throws InterruptedException;
  
      @Override
      ChannelProgressiveFuture syncUninterruptibly();
  
      @Override
      ChannelProgressiveFuture await() throws InterruptedException;
  
      @Override
      ChannelProgressiveFuture awaitUninterruptibly();
  }