ProxyFactory.h

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 *
 * VR Juggler is (C) Copyright 1998-2005 by Iowa State University
 *
 * Original Authors:
 *   Allen Bierbaum, Christopher Just,
 *   Patrick Hartling, Kevin Meinert,
 *   Carolina Cruz-Neira, Albert Baker
 *
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 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
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 * File:          $RCSfile$
 * Date modified: $Date: 2005-03-03 19:09:14 -0600 (Thu, 03 Mar 2005) $
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#ifndef _GADGET_PROXY_FACTORY_H_
#define _GADGET_PROXY_FACTORY_H_
//#pragma once

#include <gadget/gadgetConfig.h>
#include <vector>
#include <gadget/Type/Proxy.h>
#include <jccl/Config/ConfigElementPtr.h>
#include <vpr/Util/Singleton.h>
#include <jccl/RTRC/DependencyManager.h>


namespace gadget
{

class ProxyConstructorBase
{
public:
   ProxyConstructorBase()
   {;}

   virtual ~ProxyConstructorBase()
   {;}

   virtual Proxy* createProxy(jccl::ConfigElementPtr element) const = 0;

   virtual std::string getElementType() const = 0;
};


template <class PROXY>
class ProxyConstructor : public ProxyConstructorBase
{
public:
   ProxyConstructor();

   Proxy* createProxy(jccl::ConfigElementPtr element) const
   {
      PROXY* new_proxy = new PROXY;             // Create new proxy
      bool success = new_proxy->config(element);  // Attempt to configure it
                                                  // config calls inputmgr registrator

      if(success)          // Configured succesfully
      {
         return new_proxy;
      }
      else                 // Failed
      {
  //XXX//       delete new_proxy;
         return NULL;
      }
   }

   std::string getElementType() const
   {
      return PROXY::getElementType();
   }
};


class ProxyFactory
{
private:
   ProxyFactory() {;}

   void loadKnownProxies();

public:
   void registerProxy(ProxyConstructorBase* constructor);

   bool recognizeProxy(jccl::ConfigElementPtr element);

   Proxy* loadProxy(jccl::ConfigElementPtr element);

private:

   int findConstructor(jccl::ConfigElementPtr element);

private:
   std::vector<ProxyConstructorBase*> mConstructors;   
   vprSingletonHeaderWithInitFunc(ProxyFactory,loadKnownProxies);
};

} // end namespace

#endif

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