EvtSpinType.hh

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//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
//      Copyright (C) 1998      Caltech, UCSB
//
// Module: EvtGen/EvtSpinType.hh
//
// Description: Class for enumarating the different types of
//              particles and the number of states they have.
//
// Modification history:
//
//    RYD     August 12, 1998         Module created
//
//------------------------------------------------------------------------
 
#ifndef EVTSPINTYPE_HH
#define EVTSPINTYPE_HH
 
#include "EvtReport.hh"
 
class EvtSpinType {
 
public:
  enum spintype {
    SCALAR,
    VECTOR,
    TENSOR,
    DIRAC,
    PHOTON,
    NEUTRINO,
    STRING,
    RARITASCHWINGER,
    SPIN3,
    SPIN4,
    SPIN5HALF,
    SPIN7HALF
  };
 
  static int getSpin2( spintype stype ) {
 
    switch ( stype )
    {
    case SCALAR:
    case STRING: return 0;
    case DIRAC:
    case NEUTRINO: return 1;
    case VECTOR:
    case PHOTON: return 2;
    case RARITASCHWINGER: return 3;
    case TENSOR: return 4;
    case SPIN5HALF: return 5;
    case SPIN3: return 6;
    case SPIN7HALF: return 7;
    case SPIN4: return 8;
    default:
      report( ERROR, "EvtGen" ) << "Unknown spintype in EvtSpinType!" << std::endl;
      return 0;
    }
  }
 
  static int getSpinStates( spintype stype ) {
 
    switch ( stype )
    {
    case SCALAR:
    case STRING:
    case NEUTRINO: return 1;
    case DIRAC:
    case PHOTON: return 2;
    case VECTOR: return 3;
    case RARITASCHWINGER: return 4;
    case TENSOR: return 5;
    case SPIN5HALF: return 6;
    case SPIN3: return 7;
    case SPIN7HALF: return 8;
    case SPIN4: return 9;
    default:
      report( ERROR, "EvtGen" ) << "Unknown spintype in EvtSpinType!" << std::endl;
      return 0;
    }
  }
 
private:
};
 
#endif