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1   /*
2   * Copyright 2014 The Netty Project
3   *
4   * The Netty Project licenses this file to you under the Apache License,
5   * version 2.0 (the "License"); you may not use this file except in compliance
6   * with the License. You may obtain a copy of the License at:
7   *
8   *   http://www.apache.org/licenses/LICENSE-2.0
9   *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations
14  * under the License.
15  */
16  package io.netty.channel;
17  
18  final class DefaultChannelHandlerContext extends AbstractChannelHandlerContext {
19      private final ChannelHandler handler;
20  
21      DefaultChannelHandlerContext(
22              DefaultChannelPipeline pipeline, ChannelHandlerInvoker invoker, String name, ChannelHandler handler) {
23          super(pipeline, invoker, name, skipFlags(checkNull(handler)));
24          this.handler = handler;
25      }
26  
27      private static ChannelHandler checkNull(ChannelHandler handler) {
28          if (handler == null) {
29              throw new NullPointerException("handler");
30          }
31          return handler;
32      }
33  
34      @Override
35      public ChannelHandler handler() {
36          return handler;
37      }
38  }