#ifndef RESIP_EventDispatcher_hxx
#define RESIP_EventDispatcher_hxx

#include <vector>

#include "resip/dum/DumCommand.hxx"
#include "resip/dum/Postable.hxx"
#include "rutil/Mutex.hxx"
#include "rutil/Lock.hxx"

namespace resip
{

template<class E>
class EventDispatcher
{
   public:
      EventDispatcher() 
      {
      }

      bool dispatch(Message* msg)
      {
         E* event = dynamic_cast<E*>(msg);
         if (!event) return false;                         

         Lock lock(mMutex);                       
         const std::size_t size = mListeners.size();
         if (size == 0) return false; 

         for (std::size_t i = 0; i < size; ++i)
         {
            if ((i + 1) == size)
            {
               mListeners[i]->post(msg);
            }
            else
            {
               mListeners[i]->post(msg->clone());
            }
         }
         return true;
      }

      void addListener(Postable* listener)
      {
         Lock lock(mMutex);
         std::vector<Postable*>::iterator it = find(listener);
         if (it == mListeners.end())
         {
            mListeners.push_back(listener);
         }
      }

      void removeListener(Postable* listener)
      {
         Lock lock(mMutex);
         std::vector<Postable*>::iterator it = find(listener);         
         if (it != mListeners.end())
         {
            mListeners.erase(it);
         }
      }

   private:
      std::vector<Postable*> mListeners;
      Mutex mMutex;

      std::vector<Postable*>::iterator find(Postable* listener)
      {
         std::vector<Postable*>::iterator it;
         for (it = mListeners.begin(); it != mListeners.end(); ++it)
         {
            if (listener == *it)
            {
               break;
            }
         }
         return it;
      }
};

}


#endif


/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
 *    and "Vovida Open Communication Application Library (VOCAL)" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written
 *    permission, please contact vocal@vovida.org.
 *
 * 4. Products derived from this software may not be called "VOCAL", nor
 *    may "VOCAL" appear in their name, without prior written
 *    permission of Vovida Networks, Inc.
 * 
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESSED OR IMPLIED
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 * DAMAGE.
 * 
 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
 * <http://www.vovida.org/>.
 *
 */
