G4CrossSectionFactory.hh

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#ifndef G4CrossSectionFactory_h
#define G4CrossSectionFactory_h 1
 
 
#include "globals.hh"
#include "G4CrossSectionDataSetRegistry.hh"
#include "G4VCrossSectionDataSet.hh"
 
class G4VBaseXSFactory
{
 
public:
 
  virtual G4VCrossSectionDataSet* Instantiate() = 0;
 
};
 
 
template <typename T> class G4CrossSectionFactory : public G4VBaseXSFactory
{
public:
  
  G4CrossSectionFactory(const G4String& name)
  {
    G4CrossSectionDataSetRegistry::Instance()->AddFactory(name, this);
  }
  
  virtual G4VCrossSectionDataSet* Instantiate() 
  {
    return new T();
  }
};
 
 
#define G4_DECLARE_XS_FACTORY(cross_section) \
  const G4CrossSectionFactory<cross_section>& cross_section##Factory = G4CrossSectionFactory<cross_section>(cross_section::Default_Name())
 
#define G4_REFERENCE_XS_FACTORY(cross_section) \
  class cross_section; \
  extern const G4CrossSectionFactory<cross_section>& cross_section##Factory; \
  const G4CrossSectionFactory<cross_section>& cross_section##FactoryRef = cross_section##Factory
 
 
#endif