GSFAndBREMLinker.cc

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#include "RecoParticleFlow/PFProducer/interface/BlockElementLinkerBase.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecTrack.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementGsfTrack.h"
#include "DataFormats/ParticleFlowReco/interface/PFBlockElementBrem.h"
#include "RecoParticleFlow/PFClusterTools/interface/LinkByRecHit.h"
 
class GSFAndBREMLinker : public BlockElementLinkerBase {
public:
  GSFAndBREMLinker(const edm::ParameterSet& conf)
      : BlockElementLinkerBase(conf),
        useKDTree_(conf.getParameter<bool>("useKDTree")),
        debug_(conf.getUntrackedParameter<bool>("debug", false)) {}
 
  double testLink(const reco::PFBlockElement*, const reco::PFBlockElement*) const override;
 
private:
  bool useKDTree_, debug_;
};
 
DEFINE_EDM_PLUGIN(BlockElementLinkerFactory, GSFAndBREMLinker, "GSFAndBREMLinker");
 
double GSFAndBREMLinker::testLink(const reco::PFBlockElement* elem1, const reco::PFBlockElement* elem2) const {
  double dist = -1.0;
  const reco::PFBlockElementGsfTrack* gsfelem(nullptr);
  const reco::PFBlockElementBrem* bremelem(nullptr);
  if (elem1->type() < elem2->type()) {
    gsfelem = static_cast<const reco::PFBlockElementGsfTrack*>(elem1);
    bremelem = static_cast<const reco::PFBlockElementBrem*>(elem2);
  } else {
    gsfelem = static_cast<const reco::PFBlockElementGsfTrack*>(elem2);
    bremelem = static_cast<const reco::PFBlockElementBrem*>(elem1);
  }
  const reco::GsfPFRecTrackRef& gsfref = gsfelem->GsftrackRefPF();
  const reco::GsfPFRecTrackRef& bremref = bremelem->GsftrackRefPF();
  if (gsfref.isNonnull() && bremref.isNonnull() && gsfref == bremref) {
    dist = 0.001;
  }
  return dist;
}