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   /*
    * Copyright 2017 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.nio;
  
  import java.io.IOException;
  import java.nio.channels.SelectionKey;
  import java.nio.channels.Selector;
  import java.nio.channels.spi.SelectorProvider;
  import java.util.Set;
  
  final class SelectedSelectionKeySetSelector extends Selector {
      private final SelectedSelectionKeySet selectionKeys;
      private final Selector delegate;
  
      SelectedSelectionKeySetSelector(Selector delegate, SelectedSelectionKeySet selectionKeys) {
          this.delegate = delegate;
          this.selectionKeys = selectionKeys;
      }
  
      @Override
      public boolean isOpen() {
          return delegate.isOpen();
      }
  
      @Override
      public SelectorProvider provider() {
          return delegate.provider();
      }
  
      @Override
      public Set<SelectionKey> keys() {
          return delegate.keys();
      }
  
      @Override
      public Set<SelectionKey> selectedKeys() {
          return delegate.selectedKeys();
      }
  
      @Override
      public int selectNow() throws IOException {
          selectionKeys.reset();
          return delegate.selectNow();
      }
  
      @Override
      public int select(long timeout) throws IOException {
          selectionKeys.reset();
          return delegate.select(timeout);
      }
  
      @Override
      public int select() throws IOException {
          selectionKeys.reset();
          return delegate.select();
      }
  
      @Override
      public Selector wakeup() {
          return delegate.wakeup();
      }
  
      @Override
      public void close() throws IOException {
          delegate.close();
      }
  }