MTDDetLayerMeasurements.h

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#ifndef MeasurementDet_MTDDetLayerMeasurements_H
#define MeasurementDet_MTDDetLayerMeasurements_H

#include "FWCore/Framework/interface/Event.h"
#include "TrackingTools/TrajectoryState/interface/TrajectoryStateOnSurface.h"
#include "TrackingTools/GeomPropagators/interface/Propagator.h"
#include "TrackingTools/DetLayers/interface/MeasurementEstimator.h"
#include "TrackingTools/TransientTrackingRecHit/interface/TransientTrackingRecHit.h"
#include "TrackingTools/TransientTrackingRecHit/interface/GenericTransientTrackingRecHit.h"
#include "TrackingTools/MeasurementDet/interface/TrajectoryMeasurementGroup.h"
#include "DataFormats/TrackerRecHit2D/interface/MTDTrackingRecHit.h"

#include "FWCore/Utilities/interface/InputTag.h"
#include "FWCore/Framework/interface/ConsumesCollector.h"



#include <vector>

class DetLayer;
class GeomDet;
class TrajectoryMeasurement;

class MTDDetLayerMeasurements {
 public:
  typedef std::vector<TrajectoryMeasurement>          MeasurementContainer;
  typedef std::pair<const GeomDet*,TrajectoryStateOnSurface> DetWithState;
  typedef std::vector<GenericTransientTrackingRecHit::RecHitPointer> MTDRecHitContainer;

  MTDDetLayerMeasurements(edm::InputTag mtdlabel,
              edm::ConsumesCollector& iC);
  
  virtual ~MTDDetLayerMeasurements();
  
  // for a given det and state.  Not clear when the fastMeasurements below
  //  should be used, since it isn't passed a GeomDet
  MeasurementContainer
    measurements( const DetLayer* layer,
                  const GeomDet * det,
                  const TrajectoryStateOnSurface& stateOnDet,
                  const MeasurementEstimator& est,
                  const edm::Event& iEvent);

  MeasurementContainer
    measurements( const DetLayer* layer,
          const TrajectoryStateOnSurface& startingState,
          const Propagator& prop,
          const MeasurementEstimator& est,
          const edm::Event& iEvent);

  MeasurementContainer
    fastMeasurements( const DetLayer* layer,
              const TrajectoryStateOnSurface& theStateOnDet,
              const TrajectoryStateOnSurface& startingState,
              const Propagator& prop,
              const MeasurementEstimator& est,
              const edm::Event& iEvent);

  MeasurementContainer
    measurements( const DetLayer* layer,
          const TrajectoryStateOnSurface& startingState,
          const Propagator& prop,
          const MeasurementEstimator& est);

  MeasurementContainer
    fastMeasurements( const DetLayer* layer,
              const TrajectoryStateOnSurface& theStateOnDet,
              const TrajectoryStateOnSurface& startingState,
              const Propagator& prop,
              const MeasurementEstimator& est);

  std::vector<TrajectoryMeasurementGroup>
    groupedMeasurements( const DetLayer* layer,
                  const TrajectoryStateOnSurface& startingState,
                  const Propagator& prop,
                  const MeasurementEstimator& est,
                  const edm::Event& iEvent);

  std::vector<TrajectoryMeasurementGroup>
    groupedMeasurements( const DetLayer* layer,
                  const TrajectoryStateOnSurface& startingState,
                  const Propagator& prop,
                  const MeasurementEstimator& est);
 
  void setEvent(const edm::Event &);  

  MTDRecHitContainer recHits(const DetLayer* layer, const edm::Event& iEvent);

  MTDRecHitContainer recHits(const DetLayer* layer);


 private:

  MTDRecHitContainer recHits(const GeomDet*, const edm::Event& iEvent);

  void checkEvent() const;


  edm::EDGetTokenT<MTDTrackingRecHit> mtdToken_;
  
  // caches that should get filled once per event
  edm::Handle<edmNew::DetSetVector<MTDTrackingRecHit>> theMTDRecHits;

  void checkMTDRecHits();

  // keeps track of which event the cache holds
  edm::Event::CacheIdentifier_t theMTDEventCacheID;

  const edm::Event* theEvent;
};
#endif