// -------------------------------------------------------------------------
// -----                   PndGemTrackFinder header file               -----
// -----                  Created 19.03.2009 by R. Karabowicz          -----
// -----                according to the PndDchTrackFinder             -----
// -------------------------------------------------------------------------


/** \class PndGemTrackFinder
 *  \author R. Karabowicz <r.karabowicz@gsi.de>
 *  \date 19.03.2009
 *  \brief Abstract base class for concrete Gem track finding algorithm.
 * 
 *  Each derived class must implement the method DoFind. This has
 *  to operate on the TClonesArrays of Pnd hits/digis and to fill
 *  the PndGemTrackArray.
 **/

#ifndef PNDGEMTRACKFINDER
#define PNDGEMTRACKFINDER 1

#include "TObject.h"

class TClonesArray;

class PndGemTrackFinder : public TObject
{

public:

  /** Default constructor **/
  PndGemTrackFinder() { };
  
  
  /** Destructor **/
  virtual ~PndGemTrackFinder() { };
  
  
  /** Virtual method Init. If needed, to be implemented in the
   *  concrete class.
   **/
  virtual void Init() { };
  virtual void Finish() {};

  /** Virtual method SetParContainers. If needed, to be implemented in the
   *  concrete class.
   **/
  virtual void SetParContainers() { };
  
  /** Abstract method DoFind. To be implemented in the concrete class.
   *  Task: Read the hit/digi array and fill the track array,
   *  pointers to which are given as arguments
   * 
   *  \param hitOrDigiArray   Array of Pnd hits/digis
   *  \param trackArray       Array of PndGemTrack
   *  \return Number of tracks created
   **/
  virtual Int_t DoFind(TClonesArray* hitOrDigiArray,
		       TClonesArray* trackArray,
		       TClonesArray* trackCandArray) = 0;
  
  
  ClassDef(PndGemTrackFinder,1);

};

#endif