/*
    *  Licensed to the Apache Software Foundation (ASF) under one
    *  or more contributor license agreements.  See the NOTICE file
    *  distributed with this work for additional information
    *  regarding copyright ownership.  The ASF 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.apache.mina.transport.socket.nio;
  
  import java.net.DatagramSocket;
  import java.net.SocketException;
  import java.nio.channels.DatagramChannel;
  
  import org.apache.mina.core.RuntimeIoException;
  import org.apache.mina.transport.socket.AbstractDatagramSessionConfig;
  
  /**
   * Define the configuration for a Datagram based session. 
   * 
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  class NioDatagramSessionConfig extends AbstractDatagramSessionConfig {
      /** The associated channel */
      private final DatagramChannel channel;
  
      /**
       * Creates a new instance of NioDatagramSessionConfig, associated
       * with the given DatagramChannel.
       *
       * @param channel The associated DatagramChannel
       */
      NioDatagramSessionConfig(DatagramChannel channel) {
          this.channel = channel;
      }
  
      /**
       * Get the Socket receive buffer size for this DatagramChannel.
       * 
       * @return the DatagramChannel receive buffer size.
       * @throws RuntimeIoException if the socket is closed or if we 
       * had a SocketException
       * 
       * @see DatagramSocket#getReceiveBufferSize()
       */
      @Override
      public int getReceiveBufferSize() {
          try {
              return channel.socket().getReceiveBufferSize();
          } catch (SocketException e) {
              throw new RuntimeIoException(e);
          }
      }
  
      /**
       * Set the Socket receive buffer size for this DatagramChannel. <br>
       * <br>
       * Note : The underlying Socket may not accept the new buffer's size.
       * The user has to check that the new value has been set. 
       * 
       * @param receiveBufferSize the DatagramChannel receive buffer size.
       * @throws RuntimeIoException if the socket is closed or if we 
       * had a SocketException
       * 
       * @see DatagramSocket#setReceiveBufferSize(int)
       */
      @Override
      public void setReceiveBufferSize(int receiveBufferSize) {
          try {
              channel.socket().setReceiveBufferSize(receiveBufferSize);
          } catch (SocketException e) {
              throw new RuntimeIoException(e);
          }
      }
  
      /**
       * Tells if SO_BROADCAST is enabled.
       * 
       * @return <tt>true</tt> if SO_BROADCAST is enabled
       * @throws RuntimeIoException If the socket is closed or if we get an
       * {@link SocketException} 
       */
      @Override
      public boolean isBroadcast() {
          try {
              return channel.socket().getBroadcast();
          } catch (SocketException e) {
              throw new RuntimeIoException(e);
         }
     }
 
     @Override
     public void setBroadcast(boolean broadcast) {
         try {
             channel.socket().setBroadcast(broadcast);
         } catch (SocketException e) {
             throw new RuntimeIoException(e);
         }
     }
 
     /**
      * 
      * @throws RuntimeIoException If the socket is closed or if we get an
      * {@link SocketException} 
      */
     @Override
     public int getSendBufferSize() {
         try {
             return channel.socket().getSendBufferSize();
         } catch (SocketException e) {
             throw new RuntimeIoException(e);
         }
     }
 
     /**
      * 
      * @throws RuntimeIoException If the socket is closed or if we get an
      * {@link SocketException} 
      */
     @Override
     public void setSendBufferSize(int sendBufferSize) {
         try {
             channel.socket().setSendBufferSize(sendBufferSize);
         } catch (SocketException e) {
             throw new RuntimeIoException(e);
         }
     }
 
     /**
      * Tells if SO_REUSEADDR is enabled.
      * 
      * @return <tt>true</tt> if SO_REUSEADDR is enabled
      * @throws RuntimeIoException If the socket is closed or if we get an
      * {@link SocketException} 
      */
     @Override
     public boolean isReuseAddress() {
         try {
             return channel.socket().getReuseAddress();
         } catch (SocketException e) {
             throw new RuntimeIoException(e);
         }
     }
 
     /**
      * 
      * @throws RuntimeIoException If the socket is closed or if we get an
      * {@link SocketException} 
      */
     @Override
     public void setReuseAddress(boolean reuseAddress) {
         try {
             channel.socket().setReuseAddress(reuseAddress);
         } catch (SocketException e) {
             throw new RuntimeIoException(e);
         }
     }
 
     /**
      * Get the current Traffic Class for this Socket, if any. As this is
      * not a mandatory feature, the returned value should be considered as 
      * a hint. 
      * 
      * @return The Traffic Class supported by this Socket
      * @throws RuntimeIoException If the socket is closed or if we get an
      * {@link SocketException} 
      */
     @Override
     public int getTrafficClass() {
         try {
             return channel.socket().getTrafficClass();
         } catch (SocketException e) {
             throw new RuntimeIoException(e);
         }
     }
 
     /**
      * {@inheritDoc}
      * @throws RuntimeIoException If the socket is closed or if we get an
      * {@link SocketException} 
      */
     @Override
     public void setTrafficClass(int trafficClass) {
         try {
             channel.socket().setTrafficClass(trafficClass);
         } catch (SocketException e) {
             throw new RuntimeIoException(e);
         }
     }
 }