/*
    *  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.apr;
  
  import java.net.InetSocketAddress;
  
  import org.apache.mina.core.RuntimeIoException;
  import org.apache.mina.core.buffer.IoBuffer;
  import org.apache.mina.core.service.DefaultTransportMetadata;
  import org.apache.mina.core.service.IoProcessor;
  import org.apache.mina.core.service.IoService;
  import org.apache.mina.core.service.TransportMetadata;
  import org.apache.mina.core.session.IoSession;
  import org.apache.mina.transport.socket.AbstractDatagramSessionConfig;
  import org.apache.mina.transport.socket.DatagramSessionConfig;
  import org.apache.tomcat.jni.Socket;
  
  /**
   * An {@link IoSession} for APR UDP datagram based session.
   * It's implementing the usual common features for {@link DatagramSessionConfig}. 
   *
   * @author <a href="http://mina.apache.org">Apache MINA Project</a>
   */
  class AprDatagramSession extends AprSession {
  
      static final TransportMetadata METADATA = new DefaultTransportMetadata("apr", "datagram", true, false,
              InetSocketAddress.class, DatagramSessionConfig.class, IoBuffer.class);
  
      /**
       * Create an instance of {@link AprDatagramSession}. 
       * 
       * {@inheritDoc} 
       */
      AprDatagramSession(IoService service, IoProcessor<AprSession> processor, long descriptor,
              InetSocketAddress remoteAddress) throws Exception {
          super(service, processor, descriptor, remoteAddress);
          config = new SessionConfigImpl();
          this.config.setAll(service.getSessionConfig());
      }
  
      /**
       * {@inheritDoc}
       */
      public DatagramSessionConfig getConfig() {
          return (DatagramSessionConfig) config;
      }
  
      /**
       * {@inheritDoc}
       */
      public TransportMetadata getTransportMetadata() {
          return METADATA;
      }
  
      /**
       * The implementation for the {@link org.apache.mina.core.session.IoSessionConfig} related to APR UDP socket.
       * @author <a href="http://mina.apache.org">Apache MINA Project</a>
       */
      private class SessionConfigImpl extends AbstractDatagramSessionConfig {
          /**
           * {@inheritDoc}
           */
          public boolean isReuseAddress() {
              try {
                  return Socket.optGet(getDescriptor(), Socket.APR_SO_REUSEADDR) == 1;
              } catch (Exception e) {
                  throw new RuntimeIoException("Failed to get SO_REUSEADDR.", e);
              }
          }
  
          /**
           * {@inheritDoc}
           */
          public void setReuseAddress(boolean on) {
              Socket.optSet(getDescriptor(), Socket.APR_SO_REUSEADDR, on ? 1 : 0);
          }
  
          /**
           * {@inheritDoc}
           */
          public int getTrafficClass() {
              return 0;
         }
 
         /**
          * {@inheritDoc}
          */
         public void setTrafficClass(int tc) {
         }
 
         /**
          * {@inheritDoc}
          */
         public int getSendBufferSize() {
             try {
                 return Socket.optGet(getDescriptor(), Socket.APR_SO_SNDBUF);
             } catch (Exception e) {
                 throw new RuntimeException("APR Exception", e);
             }
         }
 
         /**
          * {@inheritDoc}
          */
         public void setSendBufferSize(int size) {
             Socket.optSet(getDescriptor(), Socket.APR_SO_SNDBUF, size);
         }
 
         /**
          * {@inheritDoc}
          */
         public int getReceiveBufferSize() {
             try {
                 return Socket.optGet(getDescriptor(), Socket.APR_SO_RCVBUF);
             } catch (Exception e) {
                 throw new RuntimeException("APR Exception", e);
             }
         }
 
         /**
          * {@inheritDoc}
          */
         public void setReceiveBufferSize(int size) {
             Socket.optSet(getDescriptor(), Socket.APR_SO_RCVBUF, size);
         }
 
         /**
          * {@inheritDoc}
          */
         public boolean isBroadcast() {
             return false;
         }
 
         /**
          * {@inheritDoc}
          */
         public void setBroadcast(boolean broadcast) {
         }
     }
 }