StepHandler.h

// -*- C++ -*-
//
// StepHandler.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2019 Leif Lonnblad
//
// ThePEG is licenced under version 3 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_StepHandler_H
#define ThePEG_StepHandler_H
// This is the declaration of the StepHandler class.
 
#include "ThePEG/Config/ThePEG.h"
#include "ThePEG/Utilities/Exception.fh"
#include "ThePEG/Handlers/HandlerBase.h"
#include <stdexcept>
 
namespace ThePEG {
 
class StepHandler: public HandlerBase {
 
public:
 
  virtual ~StepHandler();
 
public:
 
  virtual void handle(EventHandler & eh, const tPVector & tagged,
                      const Hint & hint) = 0;
 
  tEHPtr eventHandler() const { return theEventHandler; }
 
  void eventHandler(tEHPtr);
 
  tStepPtr newStep() {
    if ( !theNewStep ) createNewStep();
    return theNewStep;
  }
 
  tStepPtr currentStep() {
    if ( theNewStep ) return theNewStep;
    return theCurrentStep;
  }
 
public:
 
  static void Init();
 
protected:
 
  void createNewStep();
 
private:
 
  tEHPtr theEventHandler;
 
  tStepPtr theNewStep;
 
  tStepPtr theCurrentStep;
 
private:
 
  static AbstractNoPIOClassDescription<StepHandler> initStepHandler;
 
  StepHandler & operator=(const StepHandler &) = delete;
 
};
 
template <>
struct BaseClassTrait<StepHandler,1>: public ClassTraitsType {
  typedef HandlerBase NthBase;
};
 
template <>
struct ClassTraits<StepHandler>: public ClassTraitsBase<StepHandler> {
  static string className() { return "ThePEG::StepHandler"; }
};
 
}
 
#endif /* ThePEG_StepHandler_H */