#ifndef STNTUPLE_TSiGeantIsectBlock
#define STNTUPLE_TSiGeantIsectBlock
//-----------------------------------------------------------------------------
// This is a pared down version of PropagatedSiParticleColl.  It is just a
// TClonesArray of TStnSiGeantIsect objects.
//
//
//  Author:    Aaron Dominguez (CDF/LBNL)
//  Date:      June 6 2001
//-----------------------------------------------------------------------------

#include "Stntuple/obj/TStnDataBlock.hh"
#include "Stntuple/obj/TStnSiGeantIsect.hh"
#include "Stntuple/obj/TStnSiDigiCode.hh"
#include "Stntuple/obj/TStnLinkBlock.hh"
#include "TClonesArray.h"
#include "TArrayI.h"

#include <vector>

class TSiGeantIsectBlock: public TStnDataBlock {

  friend Int_t StntupleInitSiGeantIsectBlock(TStnDataBlock* block, 
					AbsEvent*      event, 
					int            mode);
public:
//------------------------------------------------------------------------------
//  data members
//------------------------------------------------------------------------------
  Int_t          fNSiGeantIsect;               // Total number of
					       // Geant intersections.

  TClonesArray*  fSiGeantIsectList;            // Flat array of
					       // intersections in
					       // blocks of same OBSP.

  TStnLinkBlock  fIsectLinkObsp;               // Link from OBSP
					       // number to
					       // intersections.
//-----------------------------------------------------------------------------
//  functions
//-----------------------------------------------------------------------------
public:
					// ****** constructors and destructor
  TSiGeantIsectBlock();
  virtual ~TSiGeantIsectBlock();

					// ****** init methods

  Int_t         InitEvent(Int_t flag=0);

					// ****** accessors
  Int_t         NSiGeantIsect  ()  { return fNSiGeantIsect; }
  TClonesArray* SiGeantIsectList() { return fSiGeantIsectList; }

  TStnSiGeantIsect*    SiGeantIsect(int i) const { 
    return (TStnSiGeantIsect*) fSiGeantIsectList->UncheckedAt(i); 
  }

  TStnLinkBlock* IsectLinkObsp() {return &fIsectLinkObsp;}

					// ****** modifiers
  TStnSiGeantIsect*      NewSiGeantIsect() {
    return new ((*fSiGeantIsectList)[fNSiGeantIsect++]) TStnSiGeantIsect();
  }


					// ****** overloaded methods of 
					// TObject
  void Clear(Option_t* opt="");
#ifndef NO_ROOT_CONST
  void Print(Option_t* opt="") const;
#else
  void Print(Option_t* opt="") ;
#endif

  ClassDef(TSiGeantIsectBlock,3)
};

#endif