IccMpeFactory.h

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/*
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// HISTORY:
//
// -Feb 4, 2006 
//  A CIccMpeCreator singleton class has been added to provide general
//  support for dynamically creating element classes using a element signature.
//  Prototype and private element type support can be added to the system
//  by pushing additional IIccMpeFactory based objects to the 
//  singleton CIccMpeCreator object.
//
// -Nov 6, 2006
//  Merged into release
//

#ifndef _ICCMPEFACTORY_H
#define _ICCMPEFACTORY_H

#include "IccDefs.h"
#include <memory>
#include <list>

//CIccProcessElement factory support
#ifdef USESAMPLEICCNAMESPACE
namespace sampleICC {
#endif

class CIccMultiProcessElement;

class ICCPROFLIB_API IIccMpeFactory 
{
public:
  virtual ~IIccMpeFactory() {}

  virtual CIccMultiProcessElement* CreateElement(icElemTypeSignature elemTypeSig)=0;

  virtual bool GetElementSigName(std::string &elemName, icElemTypeSignature elemTypeSig)=0;
};


//A CIccMpeFactoryList is used by CIccMpeCreator to keep track of element
//creation factories
typedef std::list<IIccMpeFactory*> CIccMpeFactoryList;


class CIccBasicMpeFactory : public IIccMpeFactory
{
public:
  virtual CIccMultiProcessElement* CreateElement(icElemTypeSignature elementSig);

  virtual bool GetElementSigName(std::string &elemName, icElemTypeSignature elemTypeSig);
};

class CIccMpeCreator;

typedef std::auto_ptr<CIccMpeCreator> CIccMpeCreatorPtr;

class CIccMpeCreator 
{
public:
  ~CIccMpeCreator();

  static CIccMultiProcessElement* CreateElement(icElemTypeSignature elemTypeSig)
      { return CIccMpeCreator::GetInstance()->DoCreateElement(elemTypeSig); }

  static bool GetElementSigName(std::string &elemName, icElemTypeSignature elemTypeSig)
      { return CIccMpeCreator::GetInstance()->DoGetElementSigName(elemName, elemTypeSig); }

  static void PushFactory(IIccMpeFactory *pFactory)
      { CIccMpeCreator::GetInstance()->CIccMpeCreator::DoPushFactory(pFactory); }

  static IIccMpeFactory* PopFactory()
      { return CIccMpeCreator::GetInstance()->DoPopFactory(); }

private:
  CIccMpeCreator() { }

  static CIccMpeCreator* GetInstance();

  CIccMultiProcessElement* DoCreateElement(icElemTypeSignature elemTypeSig);
  bool DoGetElementSigName(std::string &elemName, icElemTypeSignature elemTypeSig);
  void DoPushFactory(IIccMpeFactory *pFactory);
  IIccMpeFactory* DoPopFactory(bool bAll=false);

  static CIccMpeCreatorPtr theElementCreator; 

  CIccMpeFactoryList factoryStack;
};

#ifdef USESAMPLEICCNAMESPACE
} //namespace sampleICC
#endif

#endif //_ICCMPEFACTORY_H

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