#ifndef VEGA_VConditionFormula
#define VEGA_VConditionFormula

//*-- Modified : v0.50 17/07/00 by D. Buskulic
//*-- Author :    Damir Buskulic   11/01/00

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// VConditionFormula                                                    //
//                                                                      //
// The Frame conditions formula class                                   //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

#include "TFormula.h"
#include "TString.h"
#include "TObjArray.h"
#include "VVirtualFrameInfoDB.h"
#include "VFrCondition.h"

class VVirtualFrameInfoDB;
class VConditionSet;

const Int_t kMAXCODES = 100;

class VConditionFormula : public TFormula {

private:

   VVirtualFrameInfoDB* mDataBase;           // Pointer to parent database
   Short_t      mCodes[kMAXCODES];   // List of condition numbers referenced in formula
   Int_t        mNCodes;             // Number of conditions referenced in formula
   Int_t        mVarCodes[kMAXCODES];// List of variable numbers corresponding to conditions
   Double_t     mLastResult;         // Result of the last evaluation

   Int_t CheckStandardVar(const Text_t* name);  // Checks that the name of the var. is standard
   
public:
             VConditionFormula();
             VConditionFormula(const char *name,const char *expression, VVirtualFrameInfoDB *db);
             VConditionFormula(const VConditionFormula &cformula);
   virtual   ~VConditionFormula();
   virtual void       Copy(TObject &obj);
   virtual Int_t      GetConditionNumber(Int_t code) {return mCodes[code];}
   virtual Int_t      GetNConditions() {return mNCodes;}
   virtual Int_t      DefinedVariable(TString &variable);
//   virtual Double_t   EvalInstance();
   virtual Double_t   EvalInstance(VFrCondition** condarray, Int_t ncond);
   virtual Double_t   EvalInstance(VConditionSet* condset);
   virtual Double_t   EvalInstance(TObjArray* lcond);
   virtual Double_t   GetLastResult() {return mLastResult;}
   virtual Int_t      GetNcodes() {return mNCodes;}

   ClassDef(VConditionFormula,0)  //The conditions formula
};

#endif