PFCand_AssoMapAlgos.h

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#ifndef PFCand_AssoMapAlgos_h
#define PFCand_AssoMapAlgos_h


//
// Original Author:  Matthias Geisler,32 4-B20,+41227676487,
// $Id$
//
//
#include "CommonTools/RecoUtils/interface/PF_PU_AssoMapAlgos.h"

#include "DataFormats/ParticleFlowCandidate/interface/PFCandidate.h"
#include "DataFormats/ParticleFlowCandidate/interface/PFCandidateFwd.h"

//
// constants, enums and typedefs
//

typedef edm::AssociationMap<edm::OneToManyWithQuality< reco::VertexCollection, reco::PFCandidateCollection, int> > PFCandToVertexAssMap;
typedef edm::AssociationMap<edm::OneToManyWithQuality< reco::PFCandidateCollection, reco::VertexCollection, int> > VertexToPFCandAssMap;

typedef std::pair<reco::PFCandidateRef, int> PFCandQualityPair;
typedef std::vector<PFCandQualityPair > PFCandQualityPairVector;

typedef std::pair<reco::VertexRef, PFCandQualityPair> VertexPfcQuality;

typedef std::pair <reco::VertexRef, float>  VertexPtsumPair;
typedef std::vector< VertexPtsumPair > VertexPtsumVector;

class PFCand_AssoMapAlgos : public PF_PU_AssoMapAlgos  {

 public:

   //dedicated constructor for the algorithms
   PFCand_AssoMapAlgos(const edm::ParameterSet&); 

   //get all needed collections at the beginning
   void GetInputCollections(edm::Event&, const edm::EventSetup&);

   //create the pf candidate to vertex association map
   std::auto_ptr<PFCandToVertexAssMap> CreatePFCandToVertexMap(edm::Handle<reco::PFCandidateCollection>, const edm::EventSetup&);

   //create the vertex to pf candidate association map
   std::auto_ptr<VertexToPFCandAssMap> CreateVertexToPFCandMap(edm::Handle<reco::PFCandidateCollection>, const edm::EventSetup&);

   //function to sort the vertices in the AssociationMap by the sum of (pT - pT_Error)**2
   std::auto_ptr<PFCandToVertexAssMap> SortPFCandAssociationMap(PFCandToVertexAssMap*); 

 protected:
  //protected functions 

 private: 
  //private functions

   int input_MaxNumAssociations_;

   edm::InputTag input_VertexCollection_;
   edm::Handle<reco::VertexCollection> vtxcollH;

   edm::InputTag input_BeamSpot_;
   edm::Handle<reco::BeamSpot> beamspotH;

   edm::ESHandle<MagneticField> bFieldH;

};

#endif