//-------------------------------------------------------------------
// File and Version Information: 
// $Id: TSvtDataBlock.hh,v 1.6 2005/12/15 23:34:02 rlc Exp $
//
// Svt Data Structure which contains a list of SVT tracks, a list
// of XTRP tracks, and Event related informations relevant to SVT.
//
// Author List
//   Subir Sarkar
//-------------------------------------------------------------------

#ifndef TSvtDataBlock_hh
#define TSvtDataBlock_hh

#include "TClonesArray.h" 
#include <Stntuple/data/TSvtTrack.hh>
#include <Stntuple/data/TSvXtTrack.hh>
#include <Stntuple/obj/TStnDataBlock.hh>
#include <Stntuple/mod/InitStntupleDataBlocks.hh>

class TSvtDataBlock : public TStnDataBlock {

  friend Int_t StntupleInitSvtDataBlock(TStnDataBlock *, AbsEvent *, int);
//-----------------------------------------------------------------------------
//  data members
//-----------------------------------------------------------------------------
protected:
  Int_t          fNSvtTracks;		// N(SVT tracks)  in the SVTD bank
  Int_t          fNXftTracks;		// N(XTRP tracks) in the SVTD bank
  Int_t          fEEWord;		// End Event word
  TClonesArray  *fSvtTrackList;		// list of SVT tracks
  TClonesArray  *fXftTrackList;		// list of XTRP tracks
  Float_t        Beam[4];               // beamline
//-----------------------------------------------------------------------------
//  functions
//-----------------------------------------------------------------------------
public:
					// ****** constructors and destructor
  TSvtDataBlock(); 
  virtual ~TSvtDataBlock();
					// ****** accessors

  Int_t NSvtTracks() const { return fNSvtTracks; }
  Int_t NXftTracks() const { return fNXftTracks; }

  Int_t BunchTag()   const { return  fEEWord & 0xff; }
  Int_t ParityBit()  const { return (fEEWord >> 8)  & 0x1; }
  Int_t GError()     const { return (fEEWord >> 9)  & 0xff; }
  Int_t L1TrigInfo() const { return (fEEWord >> 17) & 0x3; }
  Int_t L2BufId()    const { return (fEEWord >> 19) & 0x3; }

  Int_t EEWord() const {return fEEWord;}
  void SetEEWord (Int_t eeword) {fEEWord = eeword;}

  Float_t BeamX() const { return(Beam[0]);}
  Float_t BeamY() const { return(Beam[1]);}
  Float_t BeamDX() const { return(Beam[2]);}
  Float_t BeamDY() const { return(Beam[3]);}

  TSvtTrack  *SvtTrack(int i) { 
    return (TSvtTrack  *) fSvtTrackList->UncheckedAt(i);
  }

  TSvXtTrack *XftTrack(int i) { 
    return (TSvXtTrack *) fXftTrackList->UncheckedAt(i);
  }
                                   // ****** modifiers
  TSvtTrack *NewSvtTrack() { 
    return new ((*fSvtTrackList)[fNSvtTracks++]) TSvtTrack();
  }

  TSvtTrack *NewSvtTrack(Int_t size, Int_t *data) { 
    return new ((*fSvtTrackList)[fNSvtTracks++]) TSvtTrack(size, data);
  }
  TSvXtTrack *NewSvXtTrack() { 
    return new ((*fXftTrackList)[fNXftTracks++]) TSvXtTrack();
  }

  TSvXtTrack *NewSvXtTrack(Int_t word, const Bool_t validTrack) { 
    return new ((*fXftTrackList)[fNXftTracks++]) TSvXtTrack(word, validTrack);
  }
  void SetBeamSpot(Float_t *val);

  void SetBeamSpot(Int_t ib,Float_t val){Beam[ib]=val;}

                                   // ****** trick: force load, this method is
				   // to fool smart compilers (KCC) and 
				   // to force pulling in the object file
  void  ForceLoad();
                                   // ****** overloaded methods of TObject
  void  Clear(Option_t *opt="");
  void  Print(Option_t *opt="") const;
  void  Print(TClonesArray *vec, Option_t* opt="") const;

  ClassDef(TSvtDataBlock, 2)
};

#endif