TrackFromPVSelector.cc

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// Includes
#include "FWCore/Framework/interface/EDProducer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/InputTag.h"

#include "CommonTools/Utils/interface/StringCutObjectSelector.h"

#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"

#include "DataFormats/VertexReco/interface/Vertex.h"
#include "DataFormats/VertexReco/interface/VertexFwd.h"

#include <memory>
#include <vector>
#include <sstream>


// class definition
class TrackFromPVSelector : public edm::EDProducer
{
public:
  // construction/destruction
  TrackFromPVSelector(const edm::ParameterSet& iConfig);
  virtual ~TrackFromPVSelector();
  
  // member functions
  void produce(edm::Event& iEvent,const edm::EventSetup& iSetup) override;
  void endJob() override;

private:  
  // member data
  double                                          max_dxy_           ;
  double                                          max_dz_            ;
  edm::EDGetTokenT< std::vector<reco::Vertex> >   v_recoVertexToken_ ;
  edm::EDGetTokenT< std::vector<reco::Track> >    v_recoTrackToken_  ;
};



// construction/destruction

//______________________________________________________________________________
TrackFromPVSelector::TrackFromPVSelector(const edm::ParameterSet& iConfig)
  : max_dxy_          ( iConfig.getParameter<double>( "max_dxy" ) )
  , max_dz_           ( iConfig.getParameter<double>( "max_dz" ) )
  , v_recoVertexToken_( consumes< std::vector<reco::Vertex> >( iConfig.getParameter<edm::InputTag>( "srcVertex" ) ) )
  , v_recoTrackToken_ ( consumes< std::vector<reco::Track> >( iConfig.getParameter<edm::InputTag>( "srcTrack" ) ) )
{
  produces<std::vector<reco::Track> >();
}


//______________________________________________________________________________
TrackFromPVSelector::~TrackFromPVSelector(){}

// implementation of member functions

//______________________________________________________________________________
void TrackFromPVSelector::produce(edm::Event& iEvent,const edm::EventSetup& iSetup)
{  
  std::auto_ptr<std::vector<reco::Track> > goodTracks(new std::vector<reco::Track >);
  
  edm::Handle< std::vector<reco::Vertex> > VertexHandle;
  iEvent.getByToken( v_recoVertexToken_, VertexHandle );

  edm::Handle< std::vector<reco::Track> > TrackHandle;
  iEvent.getByToken( v_recoTrackToken_, TrackHandle );
  
  if( (VertexHandle->size() == 0) || (TrackHandle->size() == 0) ) 
  {
    iEvent.put(goodTracks);
    return ;
  }
  
  reco::Vertex PV = VertexHandle->front();   
  //typename std::vector<reco::Track>::const_iterator TrackIt ;
  std::vector<reco::Track>::const_iterator TrackIt ;

  for (TrackIt = TrackHandle->begin(); TrackIt != TrackHandle->end(); ++TrackIt) {
    if ( fabs(TrackIt->dxy(PV.position())) < max_dxy_ &&
         fabs(TrackIt->dz(PV.position()))  < max_dz_  ){
      goodTracks -> push_back(*TrackIt) ;
    }
  }  
  
  iEvent.put(goodTracks);
  
}

void TrackFromPVSelector::endJob()
{
}

#include "FWCore/Framework/interface/MakerMacros.h"
DEFINE_FWK_MODULE(TrackFromPVSelector);