PFRecHitNavigatorBase.h

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#ifndef RecoParticleFlow_PFClusterProducer_PFRecHitNavigatorBase_h
#define RecoParticleFlow_PFClusterProducer_PFRecHitNavigatorBase_h

#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/EventSetup.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHit.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHitFwd.h"

#include "DataFormats/ParticleFlowReco/interface/PFRecHit.h"
#include "DataFormats/ParticleFlowReco/interface/PFRecHitFwd.h"

#include "Geometry/CaloGeometry/interface/CaloSubdetectorGeometry.h"
#include "Geometry/CaloGeometry/interface/CaloGeometry.h"
#include "Geometry/CaloGeometry/interface/CaloCellGeometry.h"
#include "Geometry/CaloGeometry/interface/TruncatedPyramid.h"
#include "Geometry/Records/interface/CaloGeometryRecord.h"

#include <unordered_map>

class PFRecHitNavigatorBase {
public:
  typedef std::unordered_map<unsigned, unsigned> DetIdToHitIdx;

  PFRecHitNavigatorBase() = default;
  PFRecHitNavigatorBase(const edm::ParameterSet& iConfig) {}

  virtual ~PFRecHitNavigatorBase() = default;

  virtual void beginEvent(const edm::EventSetup&) = 0;
  virtual void associateNeighbours(reco::PFRecHit&,
                                   std::unique_ptr<reco::PFRecHitCollection>&,
                                   edm::RefProd<reco::PFRecHitCollection>&) = 0;

protected:
  void associateNeighbour(const DetId& id,
                          reco::PFRecHit& hit,
                          std::unique_ptr<reco::PFRecHitCollection>& hits,
                          edm::RefProd<reco::PFRecHitCollection>& refProd,
                          short eta,
                          short phi,
                          short depth) {
    auto found_hit = std::lower_bound(
        hits->begin(), hits->end(), id, [](const reco::PFRecHit& a, const DetId& id) { return a.detId() < id; });
    if (found_hit != hits->end() && found_hit->detId() == id.rawId()) {
      hit.addNeighbour(eta, phi, depth, found_hit - hits->begin());
    }
  }
};

#include "FWCore/PluginManager/interface/PluginFactory.h"
typedef edmplugin::PluginFactory<PFRecHitNavigatorBase*(const edm::ParameterSet&)> PFRecHitNavigationFactory;

#endif