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   /*
    * Copyright 2015 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.epoll;
  
  import io.netty.buffer.ByteBufAllocator;
  import io.netty.channel.ChannelOption;
  import io.netty.channel.MessageSizeEstimator;
  import io.netty.channel.RecvByteBufAllocator;
  import io.netty.channel.WriteBufferWaterMark;
  import io.netty.channel.socket.DuplexChannelConfig;
  import io.netty.channel.unix.DomainSocketChannelConfig;
  import io.netty.channel.unix.DomainSocketReadMode;
  import io.netty.util.internal.ObjectUtil;
  
  import java.io.IOException;
  import java.util.Map;
  
  import static io.netty.channel.ChannelOption.ALLOW_HALF_CLOSURE;
  import static io.netty.channel.ChannelOption.SO_RCVBUF;
  import static io.netty.channel.ChannelOption.SO_SNDBUF;
  import static io.netty.channel.unix.UnixChannelOption.DOMAIN_SOCKET_READ_MODE;
  
  public final class EpollDomainSocketChannelConfig extends EpollChannelConfig
          implements DomainSocketChannelConfig, DuplexChannelConfig {
      private volatile DomainSocketReadMode mode = DomainSocketReadMode.BYTES;
      private volatile boolean allowHalfClosure;
  
      EpollDomainSocketChannelConfig(AbstractEpollChannel channel) {
          super(channel);
      }
  
      @Override
      public Map<ChannelOption<?>, Object> getOptions() {
          return getOptions(super.getOptions(), DOMAIN_SOCKET_READ_MODE, ALLOW_HALF_CLOSURE, SO_SNDBUF, SO_RCVBUF);
      }
  
      @SuppressWarnings("unchecked")
      @Override
      public <T> T getOption(ChannelOption<T> option) {
          if (option == DOMAIN_SOCKET_READ_MODE) {
              return (T) getReadMode();
          }
          if (option == ALLOW_HALF_CLOSURE) {
              return (T) Boolean.valueOf(isAllowHalfClosure());
          }
          if (option == SO_SNDBUF) {
              return (T) Integer.valueOf(getSendBufferSize());
          }
          if (option == SO_RCVBUF) {
              return (T) Integer.valueOf(getReceiveBufferSize());
          }
          return super.getOption(option);
      }
  
      @Override
      public <T> boolean setOption(ChannelOption<T> option, T value) {
          validate(option, value);
  
          if (option == DOMAIN_SOCKET_READ_MODE) {
              setReadMode((DomainSocketReadMode) value);
          } else if (option == ALLOW_HALF_CLOSURE) {
              setAllowHalfClosure((Boolean) value);
          } else if (option == SO_SNDBUF) {
              setSendBufferSize((Integer) value);
          } else if (option == SO_RCVBUF) {
              setReceiveBufferSize((Integer) value);
          } else {
              return super.setOption(option, value);
          }
  
          return true;
      }
  
      @Override
      @Deprecated
      public EpollDomainSocketChannelConfig setMaxMessagesPerRead(int maxMessagesPerRead) {
          super.setMaxMessagesPerRead(maxMessagesPerRead);
          return this;
      }
  
      @Override
      public EpollDomainSocketChannelConfig setConnectTimeoutMillis(int connectTimeoutMillis) {
          super.setConnectTimeoutMillis(connectTimeoutMillis);
          return this;
      }
  
     @Override
     public EpollDomainSocketChannelConfig setWriteSpinCount(int writeSpinCount) {
         super.setWriteSpinCount(writeSpinCount);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setRecvByteBufAllocator(RecvByteBufAllocator allocator) {
         super.setRecvByteBufAllocator(allocator);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setAllocator(ByteBufAllocator allocator) {
         super.setAllocator(allocator);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setAutoClose(boolean autoClose) {
         super.setAutoClose(autoClose);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setMessageSizeEstimator(MessageSizeEstimator estimator) {
         super.setMessageSizeEstimator(estimator);
         return this;
     }
 
     @Override
     @Deprecated
     public EpollDomainSocketChannelConfig setWriteBufferLowWaterMark(int writeBufferLowWaterMark) {
         super.setWriteBufferLowWaterMark(writeBufferLowWaterMark);
         return this;
     }
 
     @Override
     @Deprecated
     public EpollDomainSocketChannelConfig setWriteBufferHighWaterMark(int writeBufferHighWaterMark) {
         super.setWriteBufferHighWaterMark(writeBufferHighWaterMark);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setWriteBufferWaterMark(WriteBufferWaterMark writeBufferWaterMark) {
         super.setWriteBufferWaterMark(writeBufferWaterMark);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setAutoRead(boolean autoRead) {
         super.setAutoRead(autoRead);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setEpollMode(EpollMode mode) {
         super.setEpollMode(mode);
         return this;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setReadMode(DomainSocketReadMode mode) {
         this.mode = ObjectUtil.checkNotNull(mode, "mode");
         return this;
     }
 
     @Override
     public DomainSocketReadMode getReadMode() {
         return mode;
     }
 
     @Override
     public boolean isAllowHalfClosure() {
         return allowHalfClosure;
     }
 
     @Override
     public EpollDomainSocketChannelConfig setAllowHalfClosure(boolean allowHalfClosure) {
         this.allowHalfClosure = allowHalfClosure;
         return this;
     }
 
     public int getSendBufferSize() {
         try {
             return ((EpollDomainSocketChannel) channel).socket.getSendBufferSize();
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
     }
 
     public EpollDomainSocketChannelConfig setSendBufferSize(int sendBufferSize) {
         try {
             ((EpollDomainSocketChannel) channel).socket.setSendBufferSize(sendBufferSize);
             return this;
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
     }
 
     public int getReceiveBufferSize() {
         try {
             return ((EpollDomainSocketChannel) channel).socket.getReceiveBufferSize();
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
     }
 
     public EpollDomainSocketChannelConfig setReceiveBufferSize(int receiveBufferSize) {
         try {
             ((EpollDomainSocketChannel) channel).socket.setReceiveBufferSize(receiveBufferSize);
             return this;
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
     }
 }