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#ifndef TSCBLBuilderWithPropagator_H
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#define TSCBLBuilderWithPropagator_H
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#include "TrackingTools/PatternTools/interface/TrajectoryStateClosestToBeamLineBuilder.h"
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#include "TrackingTools/GeomPropagators/interface/Propagator.h"
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#include "DataFormats/GeometryCommonDetAlgo/interface/DeepCopyPointerByClone.h"
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#include "MagneticField/Engine/interface/MagneticField.h"
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/**
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* This class builds a TrajectoryStateClosestToBeamLine given an original
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* FreeTrajectoryState. This new state is then
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* defined at the point of closest approach to the beam line.
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* It is to be used when a specific propagator has to be used.
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*/
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class TSCBLBuilderWithPropagator : public TrajectoryStateClosestToBeamLineBuilder
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{
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public:
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/// constructor with default geometrical propagator
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TSCBLBuilderWithPropagator(const MagneticField* field);
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/// constructor with user-supplied propagator
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TSCBLBuilderWithPropagator(const Propagator& u);
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virtual ~TSCBLBuilderWithPropagator(){};
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virtual TrajectoryStateClosestToBeamLine operator()
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(const FTS& originalFTS, const reco::BeamSpot & beamSpot) const;
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private:
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DeepCopyPointerByClone<Propagator> thePropagator;
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};
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#endif
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