/data/refman/pasoursint/CMSSW_6_1_2_SLHC2_patch1/src/RecoVertex/MultiVertexFit/interface/MultiVertexFitter.h

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#ifndef _MultiVertexFitter_H_
#define _MultiVertexFitter_H_

#include <vector>
#include <set>
#include <utility>
#include <map>
#include "RecoVertex/VertexPrimitives/interface/CachingVertex.h"
#include "DataFormats/GeometryVector/interface/GlobalPoint.h"
#include "RecoVertex/MultiVertexFit/interface/DefaultMVFAnnealing.h"
#include "TrackingTools/TransientTrack/interface/TransientTrack.h"
#include "RecoVertex/LinearizationPointFinders/interface/DefaultLinearizationPointFinder.h"
#include "RecoVertex/MultiVertexFit/interface/LinTrackCache.h"

class MultiVertexFitter
{
public:
  MultiVertexFitter( const AnnealingSchedule & sched = DefaultMVFAnnealing(),
                     const LinearizationPointFinder & seeder = 
                        DefaultLinearizationPointFinder(),
                     float revive_below = -1. );
  MultiVertexFitter( const MultiVertexFitter & );
  ~MultiVertexFitter();

  typedef std::pair < reco::TransientTrack, float > TrackAndWeight;
  typedef std::map < int , double > SeedToWeightMap;
  typedef std::map < reco::TransientTrack, SeedToWeightMap > TrackAndSeedToWeightMap;

  std::vector < CachingVertex<5> > vertices ( 
      const std::vector < std::vector < reco::TransientTrack > > &,
      const std::vector < reco::TransientTrack > & primaries =
       std::vector < reco::TransientTrack > () );

  std::vector < CachingVertex<5> > vertices (
      const std::vector < std::vector < TrackAndWeight > > &,
      const std::vector < reco::TransientTrack > & primaries =
       std::vector < reco::TransientTrack > () );

  std::vector < CachingVertex<5> > vertices (
      const std::vector < CachingVertex<5> > &,
      const std::vector < reco::TransientTrack > & primaries =
       std::vector < reco::TransientTrack > () );

  std::vector < CachingVertex<5> > vertices ( const std::vector < TransientVertex > &,
     const std::vector < reco::TransientTrack > & primaries =
     std::vector < reco::TransientTrack > () );

private:
  std::vector < CachingVertex<5> > fit();
  void lostVertexClaimer();
  void updateWeights();
  bool updateSeeds();

  void clear();
  void createSeed ( const std::vector < reco::TransientTrack > & tracks );
  void createSeed ( const std::vector < TrackAndWeight > & tracks );
  void createPrimaries ( const std::vector < reco::TransientTrack > tracks );
  void printWeights() const;
  void printWeights( const reco::TransientTrack & ) const;
  void printSeeds() const;

  int seedNr();
  void resetSeedNr();

private:

  typedef CachingVertex<5>::RefCountedVertexTrack RefCountedVertexTrack;
  typedef ReferenceCountingPointer<LinearizedTrackState<5> > RefCountedLinearizedTrackState;

  // vertex seeds. Come with a seed number
  // makes the weight table simpler, faster,
  // and more reliable (I hope)
  std::vector < std::pair < int, CachingVertex<5> > > theVertexStates;
  int theVertexStateNr;
  float theReviveBelow;
  std::vector < reco::TransientTrack > theTracks;
  std::set < reco::TransientTrack > thePrimaries;
  AnnealingSchedule * theAssComp;
  LinearizationPointFinder * theSeeder;
  mutable TrackAndSeedToWeightMap theWeights;
  LinTrackCache theCache;
};

#endif