//* Author: Victor Perevoztchikov (perev@bnl.gov)

#ifndef ROOT_TDsKey
#define ROOT_TDsKey

#include "TString.h"
#include "TArrayI.h"

const UInt_t kUMAX = (UInt_t)(-1);

class TDsKey
{
  private:
    TString fName;
    TArrayI fUrr;

  public:
    TDsKey(const char *name=0,UInt_t *uk=0,int nk=1);
    TDsKey(const char *name,UInt_t uk);
    TDsKey(UInt_t uRun,UInt_t uEvent=0);
    virtual ~TDsKey(){}
    virtual  TDsKey &operator=( const TDsKey &from);
    virtual  TDsKey &operator=( UInt_t from);
    virtual  TDsKey &operator=( Int_t from){ *this=(UInt_t)from; return *this;}
    virtual  TDsKey &operator=( const char *from);
    virtual  Bool_t operator==(const TDsKey &from) const;
    virtual  UInt_t  operator[](Int_t i) const { return (*(TArrayI *)(&fUrr))[i]; }
    virtual  void    Update(const TDsKey &from,const char *name=0);
    virtual  void    SetName(const char *name){fName=name;} 
    virtual  const char *GetName() const {return fName;} 
    virtual  TString GetKey() const; 
    virtual  UInt_t  EventNumber() const { return (*this)[1];}
    virtual  UInt_t  RunNumber() const { return (*this)[0];}
    virtual  void    SetKey(const char *key);
    virtual  void    SetUrr(const UInt_t *key,int nk);
    virtual  UInt_t  GetSum() const;
    virtual  Int_t   EOK()    const { return (UInt_t)(*(TArrayI *)(&fUrr))[0]==kUMAX;}
    virtual  Int_t   IsNull() const { return !(*(TArrayI *)(&fUrr))[0];}

};


#endif