//-----------------------------------------------------------
// File and Version Information:
// $Id$
//
// Description:
//      Abstract Interface for residual calculation with 
//      reference tracks
//      USAGE: Create this object ON MACRO LEVEL,
//      add all required branch names
//      YOU HAVE TO MAKE SURE IN YOUR IMPLEMENTATION OF 
//      THAT THE DATA YOU NEED IS THERE!
//
// Environment:
//      Software developed for the PANDA Detector at FAIR.
//
// Author List:
//      Felix Boehmer                     (original author)
//      Sverre Doerheim                   (adapted to be more general)
//      Physik Department E18, TUM
//
//-----------------------------------------------------------

#ifndef ABSRESCALC_HH
#define ABSRESCALC_HH

#include <vector>
#include <map>
#include "TString.h"
#include "TObject.h"

class AbsRefTrackResCalc;
class TpcRefResidualCollection;
class TClonesArray;

//TODO: Make it so that the name of the residual output branch can be
//specified. The Task should then get the information from each calc
//and write the TCA to the tree
class AbsResCalc {

  friend class TpcRefTrackResidualTask;
  friend class AbsRefTrackResCalc;  
 public:
  AbsResCalc();
  ~AbsResCalc();

  //should not be needed to be re-defined!
  //dynamically add another BranchName to the list
  //POINTERS to the TCArrays are taken care of FROM THE OUTSIDE!
  //take care of the logical identification & connection in your 
  //implementation!
  virtual int addBranchName(const TString& branch);
			                     //return 0: ok,consistent
                                             //return 1: inconsistent

  
  //main function to be called after successful calculation
  virtual int calc() = 0;

  //is called by the task after setting the branches
  //this is where you should check if all the data are there!
  virtual bool init() = 0;    //false: all fine

  //will be needed from outside to connect to the input branches
  virtual std::map<TString, TClonesArray*>* getBranchMap()
    {return &fBranchMap;}

 protected:

  
  std::vector<TString> fBranchNames;
  std::map<TString, TClonesArray*> fBranchMap;
  
  bool fInit; 
  unsigned int fNExpectedBranches;

};

#endif