plugins/linkers/SCAndECALLinker.cc

0001 #include "RecoParticleFlow/PFProducer/interface/BlockElementLinkerBase.h"
0002 #include "DataFormats/ParticleFlowReco/interface/PFCluster.h"
0003 #include "DataFormats/ParticleFlowReco/interface/PFBlockElementCluster.h"
0004 #include "DataFormats/ParticleFlowReco/interface/PFBlockElementSuperCluster.h"
0005 #include "RecoParticleFlow/PFClusterTools/interface/LinkByRecHit.h"
0006 #include "RecoParticleFlow/PFClusterTools/interface/ClusterClusterMapping.h"
0007
0008 class SCAndECALLinker : public BlockElementLinkerBase {
0009 public:
0010   SCAndECALLinker(const edm::ParameterSet& conf)
0011       : BlockElementLinkerBase(conf),
0012         useKDTree_(conf.getParameter<bool>("useKDTree")),
0013         debug_(conf.getUntrackedParameter<bool>("debug", false)),
0014         superClusterMatchByRef_(conf.getParameter<bool>("SuperClusterMatchByRef")) {}
0015
0016   double testLink(const reco::PFBlockElement*, const reco::PFBlockElement*) const override;
0017
0018 private:
0019   bool useKDTree_, debug_, superClusterMatchByRef_;
0020 };
0021
0022 DEFINE_EDM_PLUGIN(BlockElementLinkerFactory, SCAndECALLinker, "SCAndECALLinker");
0023
0024 double SCAndECALLinker::testLink(const reco::PFBlockElement* elem1, const reco::PFBlockElement* elem2) const {
0025   double dist = -1.0;
0026   const reco::PFBlockElementCluster* ecalelem(nullptr);
0027   const reco::PFBlockElementSuperCluster* scelem(nullptr);
0028   if (elem1->type() < elem2->type()) {
0029     ecalelem = static_cast<const reco::PFBlockElementCluster*>(elem1);
0030     scelem = static_cast<const reco::PFBlockElementSuperCluster*>(elem2);
0031   } else {
0032     ecalelem = static_cast<const reco::PFBlockElementCluster*>(elem2);
0033     scelem = static_cast<const reco::PFBlockElementSuperCluster*>(elem1);
0034   }
0035   const reco::PFClusterRef& clus = ecalelem->clusterRef();
0036   const reco::SuperClusterRef& sclus = scelem->superClusterRef();
0037   if (sclus.isNull()) {
0038     throw cms::Exception("BadRef") << "SuperClusterRef is invalid!";
0039   }
0040
0041   if (superClusterMatchByRef_) {
0042     if (sclus == ecalelem->superClusterRef())
0043       dist = 0.001;
0044   } else {
0045     if (ClusterClusterMapping::overlap(*sclus, *clus)) {
0046       dist = LinkByRecHit::computeDist(
0047           sclus->position().eta(), sclus->position().phi(), clus->positionREP().Eta(), clus->positionREP().Phi());
0048     }
0049   }
0050   return dist;
0051 }