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