CloseComponentsMerger.h

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#ifndef CloseComponentsMerger_H
#define CloseComponentsMerger_H

#include "TrackingTools/GsfTools/interface/MultiGaussianStateMerger.h"
#include "TrackingTools/GsfTools/interface/DistanceBetweenComponents.h"
#include "DataFormats/GeometryCommonDetAlgo/interface/DeepCopyPointerByClone.h"

#include <map>
#include <algorithm>


template <unsigned int N>
class CloseComponentsMerger final : public MultiGaussianStateMerger<N> {

 private:
  using SingleState = SingleGaussianState<N>;
  using MultiState =  MultiGaussianState<N> ;
  using SingleStatePtr = std::shared_ptr<SingleState>;

 public:

  CloseComponentsMerger(int n,
               const DistanceBetweenComponents<N>* distance);

  CloseComponentsMerger* clone() const override
  {  
    return new CloseComponentsMerger(*this);
  }
  
  MultiState merge(const MultiState& mgs) const override;
  
  MultiState mergeOld(const MultiState& mgs) const;


public:
  typedef std::multimap< double, SingleStatePtr > SingleStateMap;
  typedef std::pair< SingleStatePtr, typename SingleStateMap::iterator > MinDistResult;

private:

//   std::pair< SingleState, SingleStateMap::iterator > 
  MinDistResult
  compWithMinDistToLargestWeight(SingleStateMap&) const;

  int theMaxNumberOfComponents;
  DeepCopyPointerByClone< DistanceBetweenComponents<N> > theDistance;

};  

#include "TrackingTools/GsfTools/interface/CloseComponentsMerger.icc"

#endif // CloseComponentsMerger_H