/** CbmLitHitChiSq.h
 * @author Andrey Lebedev <andrey.lebedev@gsi.de>
 * @since 2008
 * @version 1.0
 **
 ** Class for temporary storage of hit and
 ** chi-square information.
 **/

#ifndef CBMLITHITCHISQ_H_
#define CBMLITHITCHISQ_H_

#include "base/CbmLitFloat.h"
#include "data/CbmLitTrackParam.h"

class CbmLitHit;

class CbmLitHitChiSq
{
public:
   /* Constructor */
   CbmLitHitChiSq():
      fHit(NULL),
      fChiSq(0.),
      fParam() {}

   /* Destructor */
   ~CbmLitHitChiSq() {}

   /* Sets hit pointer */
   void SetHit(const CbmLitHit* hit) {fHit = hit;}

   /* Sets chi-square value */
   void SetChiSq(myf chiSq) {fChiSq = chiSq;}

   /* Set track parameter pointer */
   void SetParam(const CbmLitTrackParam* param) {fParam = *param;}

   /* Returns hit pointer */
   const CbmLitHit* GetHit() const {return fHit;}

   /* Returns chi-square value */
   myf GetChiSq() const {return fChiSq;}

   /* Returns track parameters pointer */
   const CbmLitTrackParam* GetParam() const {return &fParam;}

private:
   /* Pointer to the hit */
   const CbmLitHit* fHit;
   /* Chi-square value */
   myf fChiSq;
   /* Pointer to the track parameters */
   CbmLitTrackParam fParam;
};

class CompareHitChiSqLess:
   public std::binary_function<
   const CbmLitHitChiSq&,
   const CbmLitHitChiSq&,
   bool>
{
public:
   bool operator()(const CbmLitHitChiSq& hit1, const CbmLitHitChiSq& hit2) const {
      return hit1.GetChiSq() < hit2.GetChiSq();
   }
};

#endif /* CBMLITHITCHISQ_H_ */