/data/refman/pasoursint/CMSSW_5_2_9/src/Alignment/CommonAlignmentProducer/src/AlignmentCSCTrackSelector.cc

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#include "Alignment/CommonAlignmentProducer/interface/AlignmentCSCTrackSelector.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "FWCore/Framework/interface/Event.h"

#include "DataFormats/TrackingRecHit/interface/TrackingRecHit.h"
#include "DataFormats/TrackReco/interface/Track.h"
#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/MuonDetId/interface/CSCDetId.h"


// constructor ----------------------------------------------------------------

AlignmentCSCTrackSelector::AlignmentCSCTrackSelector(const edm::ParameterSet & cfg)
   : m_src(cfg.getParameter<edm::InputTag>("src"))
   , m_stationA(cfg.getParameter<int>("stationA"))
   , m_stationB(cfg.getParameter<int>("stationB"))
   , m_minHitsDT(cfg.getParameter<int>("minHitsDT"))
   , m_minHitsPerStation(cfg.getParameter<int>("minHitsPerStation"))
   , m_maxHitsPerStation(cfg.getParameter<int>("maxHitsPerStation"))
{}

// destructor -----------------------------------------------------------------

AlignmentCSCTrackSelector::~AlignmentCSCTrackSelector()
{}


// do selection ---------------------------------------------------------------

AlignmentCSCTrackSelector::Tracks 
AlignmentCSCTrackSelector::select(const Tracks& tracks, const edm::Event& evt) const 
{
   Tracks result;

   for (Tracks::const_iterator track = tracks.begin();  track != tracks.end();  ++track) {
      int hitsOnStationA = 0;
      int hitsOnStationB = 0;

      for (trackingRecHit_iterator hit = (*track)->recHitsBegin();  hit != (*track)->recHitsEnd();  ++hit) {
         DetId id = (*hit)->geographicalId();

         if (id.det() == DetId::Muon  &&  id.subdetId() == MuonSubdetId::DT) {
            if (m_stationA == 0) hitsOnStationA++;
            if (m_stationB == 0) hitsOnStationB++;
         }
         else if (id.det() == DetId::Muon  &&  id.subdetId() == MuonSubdetId::CSC) {
            CSCDetId cscid(id.rawId());
            int station = (cscid.endcap() == 1 ? 1 : -1) * cscid.station();

            if (station == m_stationA) hitsOnStationA++;
            if (station == m_stationB) hitsOnStationB++;

         } // end if CSC
      } // end loop over hits

      bool stationAokay;
      if (m_stationA == 0) stationAokay = (m_minHitsDT <= hitsOnStationA);
      else stationAokay = (m_minHitsPerStation <= hitsOnStationA  &&  hitsOnStationA <= m_maxHitsPerStation);

      bool stationBokay;
      if (m_stationB == 0) stationBokay = (m_minHitsDT <= hitsOnStationB);
      else stationBokay = (m_minHitsPerStation <= hitsOnStationB  &&  hitsOnStationB <= m_maxHitsPerStation);

      if (stationAokay  &&  stationBokay) {
         result.push_back(*track);
      }
   } // end loop over tracks
  
   return result;
}