/data/refman/pasoursint/CMSSW_5_3_0/src/Alignment/CommonAlignmentProducer/src/AlignmentCSCOverlapSelector.cc

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

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

#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/MuonDetId/interface/MuonSubdetId.h"
#include "DataFormats/MuonDetId/interface/CSCDetId.h"
#include "DataFormats/TrackingRecHit/interface/TrackingRecHit.h"
#include "DataFormats/TrackingRecHit/interface/TrackingRecHitFwd.h"

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

AlignmentCSCOverlapSelector::AlignmentCSCOverlapSelector(const edm::ParameterSet &iConfig)
   : m_station(iConfig.getParameter<int>("station"))
   , m_minHitsPerChamber(iConfig.getParameter<unsigned int>("minHitsPerChamber"))
{
   if (m_station == 0) {
      edm::LogInfo("AlignmentCSCOverlapSelector") 
         << "Acceptable tracks must have " << m_minHitsPerChamber << " in two chambers on all stations." << std::endl;
   }
   else {
      edm::LogInfo("AlignmentCSCOverlapSelector") 
         << "Acceptable tracks must have " << m_minHitsPerChamber << " in two chambers on station " << m_station << "." << std::endl;
   }
}

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

AlignmentCSCOverlapSelector::~AlignmentCSCOverlapSelector() {}

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

AlignmentCSCOverlapSelector::Tracks 
AlignmentCSCOverlapSelector::select(const Tracks &tracks, const edm::Event &iEvent) const {
   Tracks result;

   for (Tracks::const_iterator track = tracks.begin();  track != tracks.end();  ++track) {
      unsigned int MEminus4_even = 0;
      unsigned int MEminus4_odd = 0;
      unsigned int MEminus3_even = 0;
      unsigned int MEminus3_odd = 0;
      unsigned int MEminus2_even = 0;
      unsigned int MEminus2_odd = 0;
      unsigned int MEminus1_even = 0;
      unsigned int MEminus1_odd = 0;

      unsigned int MEplus1_even = 0;
      unsigned int MEplus1_odd = 0;
      unsigned int MEplus2_even = 0;
      unsigned int MEplus2_odd = 0;
      unsigned int MEplus3_even = 0;
      unsigned int MEplus3_odd = 0;
      unsigned int MEplus4_even = 0;
      unsigned int MEplus4_odd = 0;

      for (trackingRecHit_iterator hit = (*track)->recHitsBegin();  hit != (*track)->recHitsEnd();  ++hit) {
         DetId id = (*hit)->geographicalId();
         if (id.det() == DetId::Muon  &&  id.subdetId() == MuonSubdetId::CSC) {
            CSCDetId cscid(id.rawId());
            int station = (cscid.endcap() == 1 ? 1 : -1) * cscid.station();

            if (station == -4) {
               if (cscid.chamber() % 2 == 0) MEminus4_even++;
               else MEminus4_odd++;
            }
            else if (station == -3) {
               if (cscid.chamber() % 2 == 0) MEminus3_even++;
               else MEminus3_odd++;
            }
            else if (station == -2) {
               if (cscid.chamber() % 2 == 0) MEminus2_even++;
               else MEminus2_odd++;
            }
            else if (station == -1) {
               if (cscid.chamber() % 2 == 0) MEminus1_even++;
               else MEminus1_odd++;
            }

            else if (station == 1) {
               if (cscid.chamber() % 2 == 0) MEplus1_even++;
               else MEplus1_odd++;
            }
            else if (station == 2) {
               if (cscid.chamber() % 2 == 0) MEplus2_even++;
               else MEplus2_odd++;
            }
            else if (station == 3) {
               if (cscid.chamber() % 2 == 0) MEplus3_even++;
               else MEplus3_odd++;
            }
            else if (station == 4) {
               if (cscid.chamber() % 2 == 0) MEplus4_even++;
               else MEplus4_odd++;
            }

         } // end if it's a CSC hit
      } // end loop over hits

      if ((m_station == 0  ||  m_station == -4)  &&
          (MEminus4_even >= m_minHitsPerChamber)  &&  (MEminus4_odd >= m_minHitsPerChamber)) result.push_back(*track);

      else if ((m_station == 0  ||  m_station == -3)  &&
               (MEminus3_even >= m_minHitsPerChamber)  &&  (MEminus3_odd >= m_minHitsPerChamber)) result.push_back(*track);

      else if ((m_station == 0  ||  m_station == -2)  &&
               (MEminus2_even >= m_minHitsPerChamber)  &&  (MEminus2_odd >= m_minHitsPerChamber)) result.push_back(*track);

      else if ((m_station == 0  ||  m_station == -1)  &&
               (MEminus1_even >= m_minHitsPerChamber)  &&  (MEminus1_odd >= m_minHitsPerChamber)) result.push_back(*track);

      else if ((m_station == 0  ||  m_station == 1)  &&
               (MEplus1_even >= m_minHitsPerChamber)  &&  (MEplus1_odd >= m_minHitsPerChamber)) result.push_back(*track);

      else if ((m_station == 0  ||  m_station == 2)  &&
               (MEplus2_even >= m_minHitsPerChamber)  &&  (MEplus2_odd >= m_minHitsPerChamber)) result.push_back(*track);

      else if ((m_station == 0  ||  m_station == 3)  &&
               (MEplus3_even >= m_minHitsPerChamber)  &&  (MEplus3_odd >= m_minHitsPerChamber)) result.push_back(*track);

      else if ((m_station == 0  ||  m_station == 4)  &&
               (MEplus4_even >= m_minHitsPerChamber)  &&  (MEplus4_odd >= m_minHitsPerChamber)) result.push_back(*track);

   } // end loop over tracks
  
   return result;
}