/data/refman/pasoursint/CMSSW_5_3_3/src/PhysicsTools/RecoAlgos/plugins/CandCommonVertexFitter.h

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#ifndef RecoAlgos_CandKalmanVertexFitter_h
#define RecoAlgos_CandKalmanVertexFitter_h
#include "CommonTools/UtilAlgos/interface/EventSetupInitTrait.h"
#include "PhysicsTools/RecoUtils/interface/CandCommonVertexFitter.h"
#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Framework/interface/EventSetup.h"

namespace reco {
  namespace modules {
    template<typename Fitter>
    struct CandVertexFitterEventSetupInit {
      static void init(CandCommonVertexFitter<Fitter> & fitter, 
                       const edm::Event & evt,
                       const edm::EventSetup& es) { 
        edm::ESHandle<MagneticField> h;
        es.get<IdealMagneticFieldRecord>().get(h);
        fitter.set(h.product());
      }
    };

    template<typename Fitter>
    struct EventSetupInit<CandCommonVertexFitter<Fitter> > {
      typedef CandVertexFitterEventSetupInit<Fitter> type;
    };
  }
}

#endif