IHitParticleAssociations.h

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////////////////////////////////////////////////////////////////////////
///
/// \file  IMCTruthMatching.h
/// \brief This provides an interface which defines truth matching functions
///        made available to downstream analysis code
///
/// \author  usher@slac.stanford.edu
///
////////////////////////////////////////////////////////////////////////
#ifndef IMCTRUTHMATCHING_H
#define IMCTRUTHMATCHING_H

#include "fhiclcpp/ParameterSet.h"

#include "art/Framework/Principal/Event.h"
#include "canvas/Persistency/Common/Assns.h"
#include "nusimdata/SimulationBase/MCParticle.h"
#include "lardataobj/RecoBase/Hit.h"
#include "lardataobj/AnalysisBase/BackTrackerMatchingData.h"

///code to link reconstructed objects back to the MC truth information
namespace t0
{

using HitParticleAssociations = art::Assns<simb::MCParticle, recob::Hit, anab::BackTrackerHitMatchingData>;

class IHitParticleAssociations
{
public:
    /**
     *  @brief  Virtual Destructor
     */
    virtual ~IHitParticleAssociations() noexcept = default;

    /**
     *  @brief Interface for configuring the particular algorithm tool
     *
     *  @param ParameterSet  The input set of parameters for configuration
     */
    virtual void reconfigure(fhicl::ParameterSet const& pset) = 0;

    /**
     *  @brief This rebuilds the internal maps
     */
    virtual void CreateHitParticleAssociations(art::Event&, HitParticleAssociations*) = 0;
};

} // namespace
#endif // IMCTRUTHMATCHING_H