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   /*
    * Copyright 2012 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 org.jboss.netty.channel;
  
  import java.net.SocketAddress;
  
  /**
   * A skeletal server-side {@link Channel} implementation.  A server-side
   * {@link Channel} does not allow the following operations:
   * <ul>
   * <li>{@link #connect(SocketAddress)}</li>
   * <li>{@link #disconnect()}</li>
   * <li>{@link #getInterestOps()}</li>
   * <li>{@link #setInterestOps(int)}</li>
   * <li>{@link #write(Object)}</li>
   * <li>{@link #write(Object, SocketAddress)}</li>
   * <li>and the shortcut methods which calls the methods mentioned above
   * </ul>
   */
  public abstract class AbstractServerChannel extends AbstractChannel implements ServerChannel {
  
      /**
       * Creates a new instance.
       *
       * @param factory
       *        the factory which created this channel
       * @param pipeline
       *        the pipeline which is going to be attached to this channel
       * @param sink
       *        the sink which will receive downstream events from the pipeline
       *        and send upstream events to the pipeline
       */
      protected AbstractServerChannel(
              ChannelFactory factory,
              ChannelPipeline pipeline,
              ChannelSink sink) {
          super(null, factory, pipeline, sink);
      }
  
      @Override
      public ChannelFuture connect(SocketAddress remoteAddress) {
          return getUnsupportedOperationFuture();
      }
  
      @Override
      public ChannelFuture disconnect() {
          return getUnsupportedOperationFuture();
      }
  
      @Override
      public int getInterestOps() {
          return OP_NONE;
      }
  
      @Override
      public ChannelFuture setInterestOps(int interestOps) {
          return getUnsupportedOperationFuture();
      }
  
      @Override
      protected void setInternalInterestOps(int interestOps) {
          // Ignore.
      }
  
      @Override
      public ChannelFuture write(Object message) {
          return getUnsupportedOperationFuture();
      }
  
      @Override
      public ChannelFuture write(Object message, SocketAddress remoteAddress) {
          return getUnsupportedOperationFuture();
      }
  
      public boolean isConnected() {
          return false;
      }
  }