KinematicConstraint.h

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#ifndef KinematicConstraint_H
#define KinematicConstraint_H

#include "RecoVertex/KinematicFitPrimitives/interface/RefCountedKinematicParticle.h"
#include "RecoVertex/KinematicFitPrimitives/interface/RefCountedKinematicVertex.h"
#include "DataFormats/CLHEP/interface/AlgebraicObjects.h"

class KinematicConstraint {
public:
  KinematicConstraint() {}

  virtual ~KinematicConstraint() {}

  virtual std::pair<AlgebraicVector, AlgebraicVector> value(const AlgebraicVector& exPoint) const = 0;

  virtual std::pair<AlgebraicMatrix, AlgebraicVector> derivative(const AlgebraicVector& exPoint) const = 0;

  virtual std::pair<AlgebraicVector, AlgebraicVector> value(
      const std::vector<RefCountedKinematicParticle>& par) const = 0;

  virtual std::pair<AlgebraicMatrix, AlgebraicVector> derivative(
      const std::vector<RefCountedKinematicParticle>& par) const = 0;

  virtual AlgebraicVector deviations(int nStates) const = 0;

  virtual int numberOfEquations() const = 0;

  virtual KinematicConstraint* clone() const = 0;
};

#endif