MuonAlignmentPreFilter.cc

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// -*- C++ -*-
//
// Package:    MuonAlignmentPreFilter
// Class:      MuonAlignmentPreFilter
// 
#include <memory>

#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/EDFilter.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/Utilities/interface/InputTag.h"

#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/TrackingRecHit/interface/TrackingRecHit.h"
#include "DataFormats/TrackingRecHit/interface/TrackingRecHitFwd.h"
#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/MuonDetId/interface/MuonSubdetId.h"


class MuonAlignmentPreFilter : public edm::EDFilter
{
public:
  explicit MuonAlignmentPreFilter(const edm::ParameterSet&);
  ~MuonAlignmentPreFilter() override {}

private:
  void beginJob() override {}
  bool filter(edm::Event&, const edm::EventSetup&) override;
  void endJob() override {}

  // ----------member data ---------------------------

  edm::InputTag m_tracksTag;
  double m_minTrackPt;
  double m_minTrackP;
  bool m_allowTIDTEC;
  int m_minTrackerHits;
  int m_minDTHits;
  int m_minCSCHits;
  double m_minTrackEta;
  double m_maxTrackEta;
};


MuonAlignmentPreFilter::MuonAlignmentPreFilter(const edm::ParameterSet& cfg)
   : m_tracksTag(cfg.getParameter<edm::InputTag>("tracksTag"))
  , m_minTrackPt(cfg.getParameter<double>("minTrackPt"))
  , m_minTrackP(cfg.getParameter<double>("minTrackP"))
  , m_allowTIDTEC(cfg.getParameter<bool>("allowTIDTEC"))
  , m_minTrackerHits(cfg.getParameter<int>("minTrackerHits"))
  , m_minDTHits(cfg.getParameter<int>("minDTHits"))
  , m_minCSCHits(cfg.getParameter<int>("minCSCHits"))
  , m_minTrackEta(cfg.getParameter<double>("minTrackEta"))
  , m_maxTrackEta(cfg.getParameter<double>("maxTrackEta"))
{}


bool 
MuonAlignmentPreFilter::filter(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  edm::Handle<reco::TrackCollection> trackColl;
  iEvent.getByLabel(m_tracksTag, trackColl);
  
  // check if there's at least one interesting track:
  
  for (reco::TrackCollection::const_iterator it = trackColl->begin(); it != trackColl->end(); it++)
  {
    int tracker_numHits = 0;
    bool contains_TIDTEC = false;
    int dt_numHits = 0;
    int csc_numHits = 0;

    const reco::Track* track = &(*it);
    
    if (track->pt() < m_minTrackPt || track->p() < m_minTrackP) continue;
    if (track->eta() < m_minTrackEta || track->eta() > m_maxTrackEta ) continue;
    
    for(auto const& hit : track->recHits())
    {
      DetId id = hit->geographicalId();        
      if (id.det() == DetId::Tracker) 
      {
        tracker_numHits++;
        if (id.subdetId() == StripSubdetector::TID  ||  id.subdetId() == StripSubdetector::TEC) contains_TIDTEC = true;
      }
     
      if ( id.det() == DetId::Muon && id.subdetId() == MuonSubdetId::DT ) dt_numHits++;
      if ( id.det() == DetId::Muon && id.subdetId() == MuonSubdetId::CSC ) csc_numHits++;
    }

    if (( m_allowTIDTEC || !contains_TIDTEC )   &&
          m_minTrackerHits <= tracker_numHits &&
        ( m_minDTHits <= dt_numHits  ||  m_minCSCHits <= csc_numHits ) )  return true;
  }
  return false;
}


//define this as a plug-in
DEFINE_FWK_MODULE(MuonAlignmentPreFilter);