/*
    * 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.socket.nio;
  
  import org.jboss.netty.channel.Channel;
  import org.jboss.netty.channel.ChannelEvent;
  import org.jboss.netty.channel.ChannelFuture;
  import org.jboss.netty.channel.ChannelPipeline;
  import org.jboss.netty.channel.ChannelState;
  import org.jboss.netty.channel.ChannelStateEvent;
  import org.jboss.netty.channel.MessageEvent;
  
  import java.net.SocketAddress;
  
  class NioServerSocketPipelineSink extends AbstractNioChannelSink {
  
      public void eventSunk(
              ChannelPipeline pipeline, ChannelEvent e) throws Exception {
          Channel channel = e.getChannel();
          if (channel instanceof NioServerSocketChannel) {
              handleServerSocket(e);
          } else if (channel instanceof NioSocketChannel) {
              handleAcceptedSocket(e);
          }
      }
  
      private static void handleServerSocket(ChannelEvent e) {
          if (!(e instanceof ChannelStateEvent)) {
              return;
          }
  
          ChannelStateEvent event = (ChannelStateEvent) e;
          NioServerSocketChannel channel =
              (NioServerSocketChannel) event.getChannel();
          ChannelFuture future = event.getFuture();
          ChannelState state = event.getState();
          Object value = event.getValue();
  
          switch (state) {
          case OPEN:
              if (Boolean.FALSE.equals(value)) {
                  ((NioServerBoss) channel.boss).close(channel, future);
              }
              break;
          case BOUND:
              if (value != null) {
                  ((NioServerBoss) channel.boss).bind(channel, future, (SocketAddress) value);
              } else {
                  ((NioServerBoss) channel.boss).close(channel, future);
              }
              break;
          default:
              break;
          }
      }
  
      private static void handleAcceptedSocket(ChannelEvent e) {
          if (e instanceof ChannelStateEvent) {
              ChannelStateEvent event = (ChannelStateEvent) e;
              NioSocketChannel channel = (NioSocketChannel) event.getChannel();
              ChannelFuture future = event.getFuture();
              ChannelState state = event.getState();
              Object value = event.getValue();
  
              switch (state) {
              case OPEN:
                  if (Boolean.FALSE.equals(value)) {
                      channel.worker.close(channel, future);
                  }
                  break;
              case BOUND:
              case CONNECTED:
                  if (value == null) {
                      channel.worker.close(channel, future);
                  }
                  break;
              case INTEREST_OPS:
                  channel.worker.setInterestOps(channel, future, ((Integer) value).intValue());
                  break;
              }
          } else if (e instanceof MessageEvent) {
              MessageEvent event = (MessageEvent) e;
              NioSocketChannel channel = (NioSocketChannel) event.getChannel();
              boolean offered = channel.writeBufferQueue.offer(event);
              assert offered;
              channel.worker.writeFromUserCode(channel);
         }
     }
 }