THaHelicityDet.cxx

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//*-- Author :    Vincent Sulkosky and R. Feuerbach,  Jan 2006
// Changed to an abstract base class, Ole Hansen, Aug 2006
//
// THaHelicityDet
//
// Base class for a beam helicity detector.
//
 
 
#include "THaHelicityDet.h"
 
using namespace std;
 
//_____________________________________________________________________________
THaHelicityDet::THaHelicityDet( const char* name, const char* description ,
                                THaApparatus* apparatus )
  : THaDetector( name, description, apparatus ), fHelicity(kUnknown), fSign(1)
{
  // Constructor
}
 
//_____________________________________________________________________________
THaHelicityDet::~THaHelicityDet()
{
  // Destructor
  RemoveVariables();
}
 
//_____________________________________________________________________________
Int_t THaHelicityDet::DefineVariables( EMode mode )
{
  // Initialize global variables
 
  const RVarDef var[] = {
    { "helicity", "Beam helicity",  "fHelicity" },
    { nullptr }
  };
  return DefineVarsFromList( var, mode );
}
 
//_____________________________________________________________________________
const char* THaHelicityDet::GetDBFileName() const
{
  // All helicity detectors read from db_hel.dat by default. Database
  // keys should (but do not have to) be prefixed by each detector's prefix,
  // e.g. L.adchel.detmap
 
  return "hel.";
}
 
//_____________________________________________________________________________
void THaHelicityDet::MakePrefix()
{
  // All helicity detectors use only their name, not apparatus.name, as
  // prefix.
 
  THaDetectorBase::MakePrefix( nullptr );
 
}
 
//_____________________________________________________________________________
Int_t THaHelicityDet::ReadDatabase( const TDatime& date )
{
  // Read fSign
 
  fSign = 1;  // Default sign is +1
 
  FILE* file = OpenFile( date );
  if( !file )
    // No database file is fine since we only read an optional parameter here
    return kOK;
 
  const  DBRequest request[] = {
    { "helicity_sign", &fSign, kInt, 0, true, -2 },
    { nullptr }
  };
  Int_t err = LoadDB( file, date, request );
  fclose(file);
  if( err )
    return kInitError;
 
  return kOK;
}
 
ClassImp(THaHelicityDet)