PFMatchDistance.h

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
/*
 * PFMatchDistance.h
 *
 *  Created on: 28.03.2014
 *      Author: tlodd
 */
 
#ifndef EFLOWREC_PFMATCHDISTANCE_H
#define EFLOWREC_PFMATCHDISTANCE_H
 
#include "PFMatchInterfaces.h"
 
namespace PFMatch {
 
class EtaPhi;
class EtaPhiWithVariance;
 
/* Distance calculator classes */

class EtaPhiSqDistanceCalculator: public DistanceCalculator<EtaPhi, EtaPhi> {
public:
  EtaPhiSqDistanceCalculator() { }
  virtual ~EtaPhiSqDistanceCalculator() { }
 
  virtual double distanceBetween(const EtaPhi& position1, const EtaPhi& position2) const;
};

class EtaPhiSqSignificanceCalculator: public DistanceCalculator<EtaPhi, EtaPhiWithVariance> {
public:
  EtaPhiSqSignificanceCalculator() { }
  virtual ~EtaPhiSqSignificanceCalculator() { }
 
  virtual double distanceBetween(const EtaPhi& position1, const EtaPhiWithVariance& position2) const;
};
 
 
/* Distance calculator factory */

class DistanceFactory {
public:
  static std::unique_ptr<IDistanceProvider> Get(const std::string& distanceType, std::unique_ptr<IPositionProvider> trackPosition,
                        std::unique_ptr<IPositionProvider> clusterPosition) {
    if (distanceType == "EtaPhiSquareDistance") {
      return std::make_unique<DistanceProvider<EtaPhi, EtaPhi> >(std::move(trackPosition), std::move(clusterPosition), std::make_unique<EtaPhiSqDistanceCalculator>());
    } else if (distanceType == "EtaPhiSquareSignificance") {
      return std::make_unique<DistanceProvider<EtaPhi, EtaPhiWithVariance> >(std::move(trackPosition), std::move(clusterPosition), std::make_unique<EtaPhiSqSignificanceCalculator>());
    } else {
      std::cerr << "DistanceFactory\tERROR\tInvalid distance type: \"" << distanceType << "\"" << std::endl;
      assert(false);
      return 0;
    }
  }
};
 
}
 
#endif /* EFLOWREC_PFMATCHDISTANCE_H */