[ROOT] invalid class specified in TClonesArray ctor

From: Colin Bernet (bernet@kph.uni-mainz.de)
Date: Sun Jun 25 2000 - 15:57:05 MEST 

Hi,

I wanted to adapt the Event and Track classes to my needs, so I just
renamed the Track class as Hit, removed some methods and the ClassImp,
ClassDef. I may have removed too many things, cause now I get this
message when adding a Hit to the TClonesArray in Event :

Error in <TClonesArray::operator[]>: invalid class specified in
TClonesArray ctor

Then a segmentation fault occurs in the TObject constructor (Hit
inherits from TObject).

Could you help  ?
thanks,

    Colin





#include "Event.h"


TClonesArray *Event::fgHits = 0;

//______________________________________________________________________________
Event::Event()
{
   // Create an Event object.
   // When the constructor is invoked for the first time, the class static
   // variable fgHits is 0 and the TClonesArray fgHits is created.

   if (!fgHits) fgHits = new TClonesArray("Hit", 1000);
   fHits = fgHits;
   fNHit = 0;
}

//______________________________________________________________________________
Event::~Event()
{
   Clear();
}

//______________________________________________________________________________
void Event::AddHit(TString* detname, int channel, float data, int type)
{
   TClonesArray &Hits = *fHits;
   new(Hits[fNHit++]) Hit(detname,channel,data,type);
}

//______________________________________________________________________________
void Event::Clear(Option_t *option)
{
   fHits->Clear(option);
}

//______________________________________________________________________________
void Event::Reset(Option_t *option)
{
// Static function to reset all static objects for this event
//   fgHits->Delete(option);
   delete fgHits; fgHits = 0;
}

//______________________________________________________________________________
void Event::SetHeader(Int_t i, Int_t run)
{
   fNHit = 0;
   fEvtHdr.Set(i, run);
}

//______________________________________________________________________________
Hit::Hit(TString* detname, int channel, float data, int type) : TObject()
{
  fDetname=new TString(*detname);
  fChannel=channel;
  fData=data;
  fType=type;
}

Hit::IsMeanTimer() {
  if (fType=1) return 1; 
  else return 0;
}

Hit::IsAdc() {
  if (fType=2) return 1; 
  else return 0;
}


#ifndef MY_Event
#define MY_Event

#include <TString.h>
#include <TObject.h>
#include <TClonesArray.h>


class EventHeader {

 private:
  Int_t   fEvtNum;
  Int_t   fRun;
  
 public:
  EventHeader() : fEvtNum(0), fRun(0) { }
  virtual ~EventHeader() { }
  void   Set(Int_t i, Int_t r) { fEvtNum = i; fRun = r;}
  Int_t  GetEvtNum() const { return fEvtNum; }
  Int_t  GetRun() const { return fRun; }
};


class Event : public TObject {
  
 private:
  Int_t          fNHit;
  UInt_t         fFlag;
  EventHeader    fEvtHdr;
  TClonesArray  *fHits;
  
  static TClonesArray *fgHits;
  
 public:
  Event();
  virtual ~Event();
  void          Clear(Option_t *option ="");
  static void   Reset(Option_t *option ="");
  void          SetNhits(Int_t n) { fNHit = n; }
  void          SetFlag(UInt_t f) { fFlag = f; }
  
  void          SetHeader(Int_t i, Int_t run);
  void          AddHit(TString* detname, int channel, float data, int type);
  
  Int_t         GetNhits() const { return fNHit; }
  UInt_t        GetFlag() const { return fFlag; }
  EventHeader*  GetHeader() { return &fEvtHdr; }
  TClonesArray* GetHits() const { return fHits; }
};


class Hit : public TObject {
  
 private:
  TString *fDetname;
  int fChannel;
  float fData;
  int fType;
  
 public:
   Hit() { }
   Hit(TString* detname, int channel, float data, int type);
   virtual ~Hit() { }   
   int           IsMeanTimer();
   int           IsAdc();
};

#endif

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