brat modules

From: Djamel Ouerdane (ouerdane@nbi.dk)
Date: Fri May 05 2000 - 10:00:20 EDT

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    Hi brat users,

I have noticed that in most of brat module classes (like e.g.
BrDigitizeTof), the
scheme of the Event method was:

-----------------------------------------
  //prepare output table
BrDataTable* outputable = new BrDataTable(tableName);
OutputNode->AddDataTable(outputable);

then follows e.g. for digitizing modules:

BrDataTable  *geantHits = InputNode->GetDataTable(name);
Int_t nhits = geantHits->GetEntries();

for (Int_t  i=0; i < nhits, i++) {
      ....and then the real work of that method.
}
//end of Event method
------------------------------------------

I have changed that a bit to prevent this method from putting empty
tables in case the procedure
gives no objects to put inside these tables:

------------------------------------------
 //prepare output table
BrDataTable* outputable = new BrDataTable(tableName);

BrDataTable  *geantHits = InputNode->GetDataTable(name);
Int_t nhits = geantHits->GetEntries();

if(nhits) {
 for (Int_t  i=0; i < nhits, i++) {
    ...
    ...  procedure;
    }

  if (outputable->GetEntries())
    OutputNode->AddDataTable(outputable);
}

//end of Event method
------------------------------------------
I made that for several modules and thereby I don't have empty tables in
nodes
I'd like to analyze. The 'if(nhits)' statement prevents the program from
declaring
variables for nothing and so on.

So if you think it's worth, I can make that available for all of us.

Djamel

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