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   /*
   * Copyright 2014 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.channel;
  
  import io.netty.util.concurrent.EventExecutor;
  
  final class DefaultChannelHandlerContext extends AbstractChannelHandlerContext {
  
      private final ChannelHandler handler;
  
      DefaultChannelHandlerContext(
              DefaultChannelPipeline pipeline, EventExecutor executor, String name, ChannelHandler handler) {
          super(pipeline, executor, name, isInbound(handler), isOutbound(handler));
          if (handler == null) {
              throw new NullPointerException("handler");
          }
          this.handler = handler;
      }
  
      @Override
      public ChannelHandler handler() {
          return handler;
      }
  
      private static boolean isInbound(ChannelHandler handler) {
          return handler instanceof ChannelInboundHandler;
      }
  
      private static boolean isOutbound(ChannelHandler handler) {
          return handler instanceof ChannelOutboundHandler;
      }
  }