AlignmentTrackSelector.cc

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

#include "FWCore/Framework/interface/ESHandle.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/TrackerRecHit2D/interface/SiPixelRecHit.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripRecHit1D.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripRecHit2D.h"
#include "DataFormats/TrackerRecHit2D/interface/ProjectedSiStripRecHit2D.h"
#include "DataFormats/TrackerRecHit2D/interface/SiStripMatchedRecHit2D.h"
#include "DataFormats/TrackerRecHit2D/interface/SiTrackerMultiRecHit.h"
#include "DataFormats/SiStripCluster/interface/SiStripCluster.h"
#include "DataFormats/Alignment/interface/AlignmentClusterFlag.h"
#include "DataFormats/Alignment/interface/AliClusterValueMap.h"

#include "DataFormats/DetId/interface/DetId.h"
#include "DataFormats/SiStripDetId/interface/SiStripDetId.h"
#include "DataFormats/SiPixelDetId/interface/PixelSubdetector.h"
#include "DataFormats/TrackerCommon/interface/TrackerTopology.h"
#include "Geometry/Records/interface/TrackerTopologyRcd.h"

#include <cmath>

const int kBPIX = PixelSubdetector::PixelBarrel;
const int kFPIX = PixelSubdetector::PixelEndcap;

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

AlignmentTrackSelector::AlignmentTrackSelector(const edm::ParameterSet & cfg, edm::ConsumesCollector& iC) :
  applyBasicCuts_( cfg.getParameter<bool>( "applyBasicCuts" ) ),
  applyNHighestPt_( cfg.getParameter<bool>( "applyNHighestPt" ) ),
  applyMultiplicityFilter_( cfg.getParameter<bool>( "applyMultiplicityFilter" ) ),
  seedOnlyFromAbove_( cfg.getParameter<int>( "seedOnlyFrom" ) ),
  applyIsolation_( cfg.getParameter<bool>( "applyIsolationCut" ) ),
  chargeCheck_( cfg.getParameter<bool>( "applyChargeCheck" ) ),
  nHighestPt_( cfg.getParameter<int>( "nHighestPt" ) ),
  minMultiplicity_ ( cfg.getParameter<int>( "minMultiplicity" ) ),
  maxMultiplicity_ ( cfg.getParameter<int>( "maxMultiplicity" ) ),
  multiplicityOnInput_ ( cfg.getParameter<bool>( "multiplicityOnInput" ) ),
  ptMin_( cfg.getParameter<double>( "ptMin" ) ),
  ptMax_( cfg.getParameter<double>( "ptMax" ) ),
  pMin_( cfg.getParameter<double>( "pMin" ) ),
  pMax_( cfg.getParameter<double>( "pMax" ) ),
  etaMin_( cfg.getParameter<double>( "etaMin" ) ),
  etaMax_( cfg.getParameter<double>( "etaMax" ) ),
  phiMin_( cfg.getParameter<double>( "phiMin" ) ),
  phiMax_( cfg.getParameter<double>( "phiMax" ) ),
  nHitMin_( cfg.getParameter<double>( "nHitMin" ) ),
  nHitMax_( cfg.getParameter<double>( "nHitMax" ) ),
  chi2nMax_( cfg.getParameter<double>( "chi2nMax" ) ),
  d0Min_(  cfg.getParameter<double>( "d0Min" ) ),
  d0Max_(  cfg.getParameter<double>( "d0Max" ) ),
  dzMin_(  cfg.getParameter<double>( "dzMin" ) ),
  dzMax_(  cfg.getParameter<double>( "dzMax" ) ),
  theCharge_( cfg.getParameter<int>( "theCharge" ) ),
  minHitChargeStrip_( cfg.getParameter<double>( "minHitChargeStrip" ) ),
  minHitIsolation_( cfg.getParameter<double>( "minHitIsolation" ) ),
  countStereoHitAs2D_( cfg.getParameter<bool>( "countStereoHitAs2D" ) ),
  nHitMin2D_( cfg.getParameter<unsigned int>( "nHitMin2D" ) ),
  // Ugly to use the same getParameter n times, but this allows const cut variables...
  minHitsinTIB_(cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTIB" ) ),
  minHitsinTOB_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTOB" ) ),
  minHitsinTID_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTID" ) ),
  minHitsinTEC_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTEC" ) ),
  minHitsinBPIX_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inBPIX" ) ),
  minHitsinFPIX_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inFPIX" ) ),
  minHitsinPIX_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inPIXEL" ) ),
  minHitsinTIDplus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTIDplus" ) ),
  minHitsinTIDminus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTIDminus" ) ),
  minHitsinTECplus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTECplus" ) ),
  minHitsinTECminus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inTECminus" ) ),
  minHitsinFPIXplus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inFPIXplus" ) ),
  minHitsinFPIXminus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inFPIXminus" ) ),
  minHitsinENDCAP_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inENDCAP" ) ),
  minHitsinENDCAPplus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inENDCAPplus" ) ),
  minHitsinENDCAPminus_ (cfg.getParameter<edm::ParameterSet>( "minHitsPerSubDet" ).getParameter<int>( "inENDCAPminus" ) ),
  maxHitDiffEndcaps_( cfg.getParameter<double>( "maxHitDiffEndcaps" ) ),
  nLostHitMax_( cfg.getParameter<double>( "nLostHitMax" ) ),
  RorZofFirstHitMin_( cfg.getParameter<std::vector<double> >( "RorZofFirstHitMin" ) ),
  RorZofFirstHitMax_( cfg.getParameter<std::vector<double> >( "RorZofFirstHitMax" ) ),
  RorZofLastHitMin_( cfg.getParameter<std::vector<double> >( "RorZofLastHitMin" ) ),
  RorZofLastHitMax_( cfg.getParameter<std::vector<double> >( "RorZofLastHitMax" ) ),
  clusterValueMapTag_(cfg.getParameter<edm::InputTag>("hitPrescaleMapTag")),
  minPrescaledHits_( cfg.getParameter<int>("minPrescaledHits")),
  applyPrescaledHitsFilter_(clusterValueMapTag_.encode().size() && minPrescaledHits_ > 0)
{
  if(applyIsolation_) {
    rphirecHitsToken_ = iC.consumes<SiStripRecHit2DCollection>(cfg.getParameter<edm::InputTag>("rphirecHits"));
    matchedrecHitsToken_ = iC.consumes<SiStripMatchedRecHit2DCollection>(cfg.getParameter<edm::InputTag>("matchedrecHits"));
  }

  if(applyPrescaledHitsFilter_) {
    clusterValueMapToken_ = iC.consumes<AliClusterValueMap>(clusterValueMapTag_);
  }

  //convert track quality from string to enum
  std::vector<std::string> trkQualityStrings(cfg.getParameter<std::vector<std::string> >("trackQualities"));
  std::string qualities;
  if(trkQualityStrings.size()>0){
    applyTrkQualityCheck_=true;
    for (unsigned int i = 0; i < trkQualityStrings.size(); ++i) {
      (qualities += trkQualityStrings[i]) += ", ";
      trkQualities_.push_back(reco::TrackBase::qualityByName(trkQualityStrings[i]));
    }
  }
  else applyTrkQualityCheck_=false;

  std::vector<std::string> trkIterStrings(cfg.getParameter<std::vector<std::string> >("iterativeTrackingSteps"));
  if(trkIterStrings.size()>0){
    applyIterStepCheck_=true;
    std::string tracksteps;
    for (unsigned int i = 0; i < trkIterStrings.size(); ++i) {
      (tracksteps += trkIterStrings[i]) += ", ";
      trkSteps_.push_back(reco::TrackBase::algoByName(trkIterStrings[i]));
    }
  }
  else   applyIterStepCheck_=false;

  if (applyBasicCuts_){
      edm::LogInfo("AlignmentTrackSelector") 
    << "applying basic track cuts ..."
    << "\nptmin,ptmax:     " << ptMin_   << "," << ptMax_ 
    << "\npmin,pmax:       " << pMin_    << "," << pMax_ 
    << "\netamin,etamax:   " << etaMin_  << "," << etaMax_
    << "\nphimin,phimax:   " << phiMin_  << "," << phiMax_
    << "\nnhitmin,nhitmax: " << nHitMin_ << "," << nHitMax_
    << "\nnlosthitmax:     " << nLostHitMax_
    << "\nnhitmin2D:       " << nHitMin2D_
        << (countStereoHitAs2D_ ? "," : ", not") << " counting hits on SiStrip stereo modules as 2D" 
    << "\nchi2nmax:        " << chi2nMax_;

      if (applyIsolation_)
    edm::LogInfo("AlignmentTrackSelector") 
      << "only retain tracks isolated at least by " << minHitIsolation_ << 
      " cm from other rechits"; 
      
      if (chargeCheck_)
    edm::LogInfo("AlignmentTrackSelector") 
      << "only retain hits with at least " << minHitChargeStrip_ <<  
      " ADC counts of total cluster charge"; 
   
      edm::LogInfo("AlignmentTrackSelector") 
    << "Minimum number of hits in TIB/TID/TOB/TEC/BPIX/FPIX/PIXEL = " 
    << minHitsinTIB_ << "/" << minHitsinTID_ << "/" << minHitsinTOB_
        << "/" << minHitsinTEC_ << "/" << minHitsinBPIX_ << "/" << minHitsinFPIX_ << "/" << minHitsinPIX_;

      edm::LogInfo("AlignmentTrackSelector")
        << "Minimum number of hits in TID+/TID-/TEC+/TEC-/FPIX+/FPIX- = "
        << minHitsinTIDplus_ << "/" << minHitsinTIDminus_
        << "/" << minHitsinTECplus_ << "/" << minHitsinTECminus_
        << "/" << minHitsinFPIXplus_ << "/" << minHitsinFPIXminus_;

      edm::LogInfo("AlignmentTrackSelector")
        << "Minimum number of hits in EndCap (TID+TEC)/EndCap+/EndCap- = "
        << minHitsinENDCAP_ << "/" << minHitsinENDCAPplus_ << "/" << minHitsinENDCAPminus_;

      edm::LogInfo("AlignmentTrackSelector")
    << "Max value of |nHitsinENDCAPplus - nHitsinENDCAPminus| = "
    << maxHitDiffEndcaps_;

      if (trkQualityStrings.size()) {
    edm::LogInfo("AlignmentTrackSelector")
      << "Select tracks with these qualities: " << qualities;
      }    
  }
  
  if (applyNHighestPt_)
    edm::LogInfo("AlignmentTrackSelector") 
      << "filter N tracks with highest Pt N=" << nHighestPt_;

  if (applyMultiplicityFilter_)
    edm::LogInfo("AlignmentTrackSelector") 
      << "apply multiplicity filter N>= " << minMultiplicity_ << "and N<= " << maxMultiplicity_
          << " on " << (multiplicityOnInput_ ? "input" : "output");

  if (applyPrescaledHitsFilter_) {
    edm::LogInfo("AlignmentTrackSelector") 
      << "apply cut on number of prescaled hits N>= " << minPrescaledHits_
      << " (prescale info from " << clusterValueMapTag_ << ")";
    
  }

  // Checking whether cuts on positions of first and last track hits are defined properly
  if(RorZofFirstHitMin_.size() != 2){
      throw cms::Exception("BadConfig") << "@SUB=AlignmentTrackSelector::AlignmentTrackSelector" 
      << "Wrong configuration of 'RorZofFirstHitMin'."
      << " Must have exactly 2 values instead of configured " << RorZofFirstHitMin_.size() << ")";
  } else {
    RorZofFirstHitMin_.at(0)=std::fabs(RorZofFirstHitMin_.at(0));
    RorZofFirstHitMin_.at(1)=std::fabs(RorZofFirstHitMin_.at(1));
  }
  if(RorZofFirstHitMax_.size() != 2){
      throw cms::Exception("BadConfig") << "@SUB=AlignmentTrackSelector::AlignmentTrackSelector" 
      << "Wrong configuration of 'RorZofFirstHitMax'."
      << " Must have exactly 2 values instead of configured " << RorZofFirstHitMax_.size() << ")";
  } else {
    RorZofFirstHitMax_.at(0) = std::fabs(RorZofFirstHitMax_.at(0));
    RorZofFirstHitMax_.at(1) = std::fabs(RorZofFirstHitMax_.at(1));
  }
  if(RorZofLastHitMin_.size() != 2){
      throw cms::Exception("BadConfig") << "@SUB=AlignmentTrackSelector::AlignmentTrackSelector" 
      << "Wrong configuration of 'RorZofLastHitMin'."
      << " Must have exactly 2 values instead of configured " << RorZofLastHitMin_.size() << ")";
  } else {
    RorZofLastHitMin_.at(0) = std::fabs(RorZofLastHitMin_.at(0));
    RorZofLastHitMin_.at(1) = std::fabs(RorZofLastHitMin_.at(1));
  }
  if(RorZofLastHitMax_.size() != 2){
      throw cms::Exception("BadConfig") << "@SUB=AlignmentTrackSelector::AlignmentTrackSelector" 
      << "Wrong configuration of 'RorZofLastHitMax'."
      << " Must have exactly 2 values instead of configured " << RorZofLastHitMax_.size() << ")";
  } else {
    RorZofLastHitMax_.at(0) = std::fabs(RorZofLastHitMax_.at(0));
    RorZofLastHitMax_.at(1) = std::fabs(RorZofLastHitMax_.at(1));
  }
  // If first hit set to be at larger distance then the last hit
  if(RorZofFirstHitMin_.at(0) > RorZofLastHitMax_.at(0) && RorZofFirstHitMin_.at(1) > RorZofLastHitMax_.at(1)){
      throw cms::Exception("BadConfig") << "@SUB=AlignmentTrackSelector::AlignmentTrackSelector" 
      << "Position of the first hit is set to larger distance than the last hit:."
      << " First hit(min): [" << RorZofFirstHitMin_.at(0) << ", " << RorZofFirstHitMin_.at(1) << "]; Last hit(max): [" 
      << RorZofLastHitMax_.at(0) << ", " << RorZofLastHitMax_.at(1) << "];";
  }

}

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

AlignmentTrackSelector::~AlignmentTrackSelector()
{}


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

AlignmentTrackSelector::Tracks 
AlignmentTrackSelector::select(const Tracks& tracks, const edm::Event& evt, const edm::EventSetup& eSetup) const 
{
  
  if (applyMultiplicityFilter_ && multiplicityOnInput_ && 
      (tracks.size() < static_cast<unsigned int>(minMultiplicity_) 
       || tracks.size() > static_cast<unsigned int>(maxMultiplicity_))) {
    return Tracks(); // empty collection
  }

  Tracks result = tracks;
  // apply basic track cuts (if selected)
  if (applyBasicCuts_) result= this->basicCuts(result, evt, eSetup);
  
  // filter N tracks with highest Pt (if selected)
  if (applyNHighestPt_) result = this->theNHighestPtTracks(result);
  
  // apply minimum multiplicity requirement (if selected)
  if (applyMultiplicityFilter_ && !multiplicityOnInput_) {
    if (result.size() < static_cast<unsigned int>(minMultiplicity_) 
        || result.size() > static_cast<unsigned int>(maxMultiplicity_) ) {

      result.clear();
    }
  }

  if(applyPrescaledHitsFilter_){
    result = this->checkPrescaledHits(result, evt);
  }

  return result;
}

bool AlignmentTrackSelector::useThisFilter()
{
  return applyMultiplicityFilter_ || applyBasicCuts_ || applyNHighestPt_ || applyPrescaledHitsFilter_;

}


// make basic cuts ------------------------------------------------------------

AlignmentTrackSelector::Tracks 
AlignmentTrackSelector::basicCuts(const Tracks& tracks, const edm::Event& evt, const edm::EventSetup& eSetup) const 
{
  Tracks result;

  for (Tracks::const_iterator it=tracks.begin(); it != tracks.end(); ++it) {
    const reco::Track* trackp=*it;
    float pt=trackp->pt();
    float p=trackp->p();
    float eta=trackp->eta();
    float phi=trackp->phi();
    int nhit = trackp->numberOfValidHits(); 
    int nlosthit = trackp->numberOfLostHits(); 
    float chi2n = trackp->normalizedChi2();

    int q = trackp->charge();
    bool isChargeOk = false;
    if(theCharge_==-1 && q<0)         isChargeOk = true; 
    else if (theCharge_==1 && q>0)    isChargeOk = true; 
    else if (theCharge_==0)           isChargeOk = true; 

    float d0    = trackp->d0();
    float dz    = trackp->dz();

    // edm::LogDebug("AlignmentTrackSelector") << " pt,eta,phi,nhit: "
    //  <<pt<<","<<eta<<","<<phi<<","<<nhit;

    if (pt>ptMin_ && pt<ptMax_ 
       && p>pMin_ && p<pMax_ 
       && eta>etaMin_ && eta<etaMax_ 
       && phi>phiMin_ && phi<phiMax_ 
       && nhit>=nHitMin_ && nhit<=nHitMax_
       && nlosthit<=nLostHitMax_
       && chi2n<chi2nMax_
       && isChargeOk
       && d0>=d0Min_ && d0<=d0Max_
       && dz>=dzMin_ && dz<=dzMax_) {
      bool trkQualityOk=false ;
      if (!applyTrkQualityCheck_ &&!applyIterStepCheck_)trkQualityOk=true ; // nothing required
      else trkQualityOk = this->isOkTrkQuality(trackp);

      bool hitsCheckOk=this->detailedHitsCheck(trackp, evt, eSetup);
 
      if (trkQualityOk && hitsCheckOk )  result.push_back(trackp);
    }
  }

  return result;
}

//-----------------------------------------------------------------------------

bool AlignmentTrackSelector::detailedHitsCheck(const reco::Track *trackp, const edm::Event& evt, const edm::EventSetup& eSetup) const
{

  //Retrieve tracker topology from geometry
  edm::ESHandle<TrackerTopology> tTopoHandle;
  eSetup.get<TrackerTopologyRcd>().get(tTopoHandle);
  const TrackerTopology* const tTopo = tTopoHandle.product();

  // checking hit requirements beyond simple number of valid hits

  if (minHitsinTIB_ || minHitsinTOB_ || minHitsinTID_ || minHitsinTEC_
      || minHitsinENDCAP_ || minHitsinENDCAPplus_ || minHitsinENDCAPminus_ || (maxHitDiffEndcaps_ < 999)
      || minHitsinTIDplus_ || minHitsinTIDminus_
      || minHitsinFPIXplus_ || minHitsinFPIXminus_
      || minHitsinTECplus_ || minHitsinTECminus_
      || minHitsinFPIX_ || minHitsinBPIX_ || minHitsinPIX_ ||nHitMin2D_ || chargeCheck_
      || applyIsolation_ || (seedOnlyFromAbove_ == 1 || seedOnlyFromAbove_ == 2)
      || RorZofFirstHitMin_.size() > 0 || RorZofFirstHitMax_.size() > 0 || RorZofLastHitMin_.size() > 0 || RorZofLastHitMax_.size() > 0 ) {
    // any detailed hit cut is active, so have to check
    
    int nhitinTIB = 0, nhitinTOB = 0, nhitinTID = 0;
    int nhitinTEC = 0, nhitinBPIX = 0, nhitinFPIX = 0, nhitinPIXEL=0;
    int nhitinENDCAP = 0, nhitinENDCAPplus = 0, nhitinENDCAPminus = 0;
    int nhitinTIDplus = 0, nhitinTIDminus = 0;
    int nhitinFPIXplus = 0, nhitinFPIXminus = 0;
    int nhitinTECplus = 0, nhitinTECminus = 0;
    unsigned int nHit2D = 0;
    unsigned int thishit = 0;

    for (trackingRecHit_iterator iHit = trackp->recHitsBegin(); iHit != trackp->recHitsEnd(); ++iHit) {
      thishit++;
      const DetId detId((*iHit)->geographicalId());
      const int subdetId = detId.subdetId(); 

      // *** thishit == 1 means last hit in CTF *** 
      // (FIXME: assumption might change or not be valid for all tracking algorthms)
      // ==> for cosmics
      // seedOnlyFrom = 1 is TIB-TOB-TEC tracks only
      // seedOnlyFrom = 2 is TOB-TEC tracks only 
      if (seedOnlyFromAbove_ == 1 && thishit == 1 
          && (subdetId == int(SiStripDetId::TOB) || subdetId == int(SiStripDetId::TEC))){
        return false; 
      }
      if (seedOnlyFromAbove_ == 2 && thishit == 1 && subdetId == int(SiStripDetId::TIB)) {
        return false;
      }

      if (!(*iHit)->isValid()) continue; // only real hits count as in trackp->numberOfValidHits()
      if (detId.det() != DetId::Tracker) {
        edm::LogError("DetectorMismatch") << "@SUB=AlignmentTrackSelector::detailedHitsCheck"
                                          << "DetId.det() != DetId::Tracker (=" << DetId::Tracker
                                          << "), but " << detId.det() << ".";
      }
      const TrackingRecHit* therechit = (*iHit);
      if (chargeCheck_ && !(this->isOkCharge(therechit))) return false;
      if (applyIsolation_ && (!this->isIsolated(therechit, evt))) return false;
      if      (SiStripDetId::TIB == subdetId) ++nhitinTIB;
      else if (SiStripDetId::TOB == subdetId) ++nhitinTOB;
      else if (SiStripDetId::TID == subdetId) {
        ++nhitinTID;
        ++nhitinENDCAP;
        
        if (tTopo->tidIsZMinusSide(detId)) {
          ++nhitinTIDminus;
          ++nhitinENDCAPminus;
    }
        else if (tTopo->tidIsZPlusSide(detId)) {
          ++nhitinTIDplus;
          ++nhitinENDCAPplus;
    }
      }
      else if (SiStripDetId::TEC == subdetId) {
        ++nhitinTEC;
        ++nhitinENDCAP;
        
        if (tTopo->tecIsZMinusSide(detId)) {
          ++nhitinTECminus;
          ++nhitinENDCAPminus;
    }
        else if (tTopo->tecIsZPlusSide(detId)) {
          ++nhitinTECplus;
          ++nhitinENDCAPplus;
    }
      }
      else if (            kBPIX == subdetId) {++nhitinBPIX;++nhitinPIXEL;}
      else if (            kFPIX == subdetId) {
        ++nhitinFPIX;
        ++nhitinPIXEL;
    
        if (tTopo->pxfSide(detId)==1) ++nhitinFPIXminus;
        else if (tTopo->pxfSide(detId)==2) ++nhitinFPIXplus;
      }
      // Do not call isHit2D(..) if already enough 2D hits for performance reason:
      if (nHit2D < nHitMin2D_ && this->isHit2D(**iHit)) ++nHit2D;
    } // end loop on hits


    // Checking whether the track satisfies requirement of the first and last hit positions
    bool passedLastHitPositionR = true;
    bool passedLastHitPositionZ = true;
    bool passedFirstHitPositionR = true;
    bool passedFirstHitPositionZ = true;
    
    if( RorZofFirstHitMin_.at(0) != 0.0 || RorZofFirstHitMin_.at(1) != 0.0 
      || RorZofFirstHitMax_.at(0) != 999.0 || RorZofFirstHitMax_.at(1) != 999.0 ) {

      const reco::TrackBase::Point firstPoint(trackp->innerPosition());

      if( (std::fabs(firstPoint.R()) < RorZofFirstHitMin_.at(0) )) passedFirstHitPositionR = false;
      if( (std::fabs(firstPoint.R()) > RorZofFirstHitMax_.at(0) )) passedFirstHitPositionR = false;
      if( (std::fabs(firstPoint.Z()) < RorZofFirstHitMin_.at(1) )) passedFirstHitPositionZ = false;
      if( (std::fabs(firstPoint.Z()) > RorZofFirstHitMax_.at(1) )) passedFirstHitPositionZ = false;
    }
    
    if( RorZofLastHitMin_.at(0) != 0.0 || RorZofLastHitMin_.at(1) != 0.0 
      || RorZofLastHitMax_.at(0) != 999.0 || RorZofLastHitMax_.at(1) != 999.0 ) {

      const reco::TrackBase::Point lastPoint(trackp->outerPosition());

      if( (std::fabs(lastPoint.R()) < RorZofLastHitMin_.at(0) )) passedLastHitPositionR = false;
      if( (std::fabs(lastPoint.R()) > RorZofLastHitMax_.at(0) )) passedLastHitPositionR = false;
      if( (std::fabs(lastPoint.Z()) < RorZofLastHitMin_.at(1) )) passedLastHitPositionZ = false;
      if( (std::fabs(lastPoint.Z()) > RorZofLastHitMax_.at(1) )) passedLastHitPositionZ = false;
    }

    bool passedFirstHitPosition = passedFirstHitPositionR || passedFirstHitPositionZ;
    bool passedLastHitPosition = passedLastHitPositionR || passedLastHitPositionZ;


  
    return (nhitinTIB >= minHitsinTIB_ && nhitinTOB >= minHitsinTOB_ 
            && nhitinTID >= minHitsinTID_ && nhitinTEC >= minHitsinTEC_ 
            && nhitinENDCAP >= minHitsinENDCAP_ && nhitinENDCAPplus >= minHitsinENDCAPplus_ && nhitinENDCAPminus >= minHitsinENDCAPminus_
        && std::abs(nhitinENDCAPplus-nhitinENDCAPminus) <= maxHitDiffEndcaps_
            && nhitinTIDplus >= minHitsinTIDplus_ && nhitinTIDminus >= minHitsinTIDminus_
            && nhitinFPIXplus >= minHitsinFPIXplus_ && nhitinFPIXminus >= minHitsinFPIXminus_
            && nhitinTECplus >= minHitsinTECplus_ && nhitinTECminus >= minHitsinTECminus_
            && nhitinBPIX >= minHitsinBPIX_ 
        && nhitinFPIX >= minHitsinFPIX_ && nhitinPIXEL>=minHitsinPIX_ 
            && nHit2D >= nHitMin2D_ && passedFirstHitPosition && passedLastHitPosition);
  } else { // no cuts set, so we are just fine and can avoid loop on hits
    return true;
  }
  
}

//-----------------------------------------------------------------------------

bool AlignmentTrackSelector::isHit2D(const TrackingRecHit &hit) const
{
  // we count SiStrip stereo modules as 2D if selected via countStereoHitAs2D_
  // (since they provide theta information)
  if (!hit.isValid() ||
      (hit.dimension() < 2 && !countStereoHitAs2D_ && !dynamic_cast<const SiStripRecHit1D*>(&hit))){
    return false; // real RecHit1D - but SiStripRecHit1D depends on countStereoHitAs2D_
  } else {
    const DetId detId(hit.geographicalId());
    if (detId.det() == DetId::Tracker) {
      if (detId.subdetId() == kBPIX || detId.subdetId() == kFPIX) {
        return true; // pixel is always 2D
      } else { // should be SiStrip now
    const SiStripDetId stripId(detId);
    if (stripId.stereo()) return countStereoHitAs2D_; // stereo modules
        else if (dynamic_cast<const SiStripRecHit1D*>(&hit)
         || dynamic_cast<const SiStripRecHit2D*>(&hit)) return false; // rphi modules hit
    //the following two are not used any more since ages... 
        else if (dynamic_cast<const SiStripMatchedRecHit2D*>(&hit)) return true; // matched is 2D
        else if (dynamic_cast<const ProjectedSiStripRecHit2D*>(&hit)) {
      const ProjectedSiStripRecHit2D* pH = static_cast<const ProjectedSiStripRecHit2D*>(&hit);
      return (countStereoHitAs2D_ && this->isHit2D(pH->originalHit())); // depends on original...
    } else {
          edm::LogError("UnkownType") << "@SUB=AlignmentTrackSelector::isHit2D"
                                      << "Tracker hit not in pixel, neither SiStripRecHit[12]D nor "
                                      << "SiStripMatchedRecHit2D nor ProjectedSiStripRecHit2D.";
          return false;
        }
      }
    } else { // not tracker??
      edm::LogWarning("DetectorMismatch") << "@SUB=AlignmentTrackSelector::isHit2D"
                                          << "Hit not in tracker with 'official' dimension >=2.";
      return true; // dimension() >= 2 so accept that...
    }
  }
  // never reached...
}

//-----------------------------------------------------------------------------

bool AlignmentTrackSelector::isOkCharge(const TrackingRecHit* hit) const
{
  if (!hit || !hit->isValid()) return true; 

  // check det and subdet
  const DetId id(hit->geographicalId());
  if (id.det() != DetId::Tracker) {
    edm::LogWarning("DetectorMismatch") << "@SUB=isOkCharge" << "Hit not in tracker!";
    return true;
  }
  if (id.subdetId() == kFPIX || id.subdetId() == kBPIX) {
    return true; // might add some requirement...
  }

  // We are in SiStrip now, so test normal hit:
  const std::type_info &type = typeid(*hit);
  

  if (type == typeid(SiStripRecHit2D)) {
    const SiStripRecHit2D *stripHit2D = dynamic_cast<const SiStripRecHit2D*>(hit);
    if (stripHit2D) {
      return this->isOkChargeStripHit(*stripHit2D);
    }
  }
  else if(type == typeid(SiStripRecHit1D)){
    const SiStripRecHit1D *stripHit1D = dynamic_cast<const SiStripRecHit1D*>(hit);
    if (stripHit1D) {
      return this->isOkChargeStripHit(*stripHit1D);
    } 
  }

  else if(type == typeid(SiStripMatchedRecHit2D)){  // or matched (should not occur anymore due to hit splitting since 20X)
    const SiStripMatchedRecHit2D *matchedHit = dynamic_cast<const SiStripMatchedRecHit2D*>(hit);
    if (matchedHit) {  
      return (this->isOkChargeStripHit(matchedHit->monoHit())
          && this->isOkChargeStripHit(matchedHit->stereoHit()));
    }
  }
  else if(type == typeid(ProjectedSiStripRecHit2D)){ 
    // or projected (should not occur anymore due to hit splitting since 20X):
    const ProjectedSiStripRecHit2D *projHit = dynamic_cast<const ProjectedSiStripRecHit2D*>(hit);
    if (projHit) {
      return this->isOkChargeStripHit(projHit->originalHit());
    }
  }
  else{
    edm::LogError("AlignmentTrackSelector")<< "@SUB=isOkCharge" <<"Unknown type of a valid tracker hit in Strips "
                                           << " SubDet = "<<id.subdetId();
    return false;
  }
  


  // and now? SiTrackerMultiRecHit? Not here I guess!
  // Should we throw instead?
  edm::LogError("AlignmentTrackSelector") 
    << "@SUB=isOkCharge" << "Unknown valid tracker hit not in pixel, subdet " << id.subdetId()
    << ", SiTrackerMultiRecHit " << dynamic_cast<const SiTrackerMultiRecHit*>(hit)
    << ", BaseTrackerRecHit " << dynamic_cast<const BaseTrackerRecHit*>(hit); 
  
  return true;
} 


//-----------------------------------------------------------------------------

bool AlignmentTrackSelector::isOkChargeStripHit(const SiStripRecHit2D & siStripRecHit2D) const
{
  double charge = 0.;

  SiStripRecHit2D::ClusterRef cluster(siStripRecHit2D.cluster());
  const auto &amplitudes = cluster->amplitudes();

  for (size_t ia = 0; ia < amplitudes.size(); ++ia) {
    charge += amplitudes[ia];
  }

  return (charge >= minHitChargeStrip_);
}

//-----------------------------------------------------------------------------

bool AlignmentTrackSelector::isOkChargeStripHit(const SiStripRecHit1D & siStripRecHit1D) const
{
  double charge = 0.;

  SiStripRecHit1D::ClusterRef cluster(siStripRecHit1D.cluster());
  const auto &amplitudes = cluster->amplitudes();

  for (size_t ia = 0; ia < amplitudes.size(); ++ia) {
    charge += amplitudes[ia];
  }

  return (charge >= minHitChargeStrip_);
}

//-----------------------------------------------------------------------------

bool AlignmentTrackSelector::isIsolated(const TrackingRecHit* therechit, const edm::Event& evt) const
{
  // FIXME:
  // adapt to changes after introduction of SiStripRecHit1D...
  //
  // edm::ESHandle<TrackerGeometry> tracker;
  edm::Handle<SiStripRecHit2DCollection> rphirecHits;
  edm::Handle<SiStripMatchedRecHit2DCollection> matchedrecHits;
  // es.get<TrackerDigiGeometryRecord>().get(tracker);
  evt.getByToken( rphirecHitsToken_, rphirecHits );
  evt.getByToken( matchedrecHitsToken_, matchedrecHits );

  SiStripRecHit2DCollection::DataContainer::const_iterator istripSt; 
  SiStripMatchedRecHit2DCollection::DataContainer::const_iterator istripStm; 
  const SiStripRecHit2DCollection::DataContainer& stripcollSt = rphirecHits->data();
  const SiStripMatchedRecHit2DCollection::DataContainer& stripcollStm = matchedrecHits->data();
  
  DetId idet = therechit->geographicalId(); 
  
  // FIXME: instead of looping the full hit collection, we should explore the features of 
  // SiStripRecHit2DCollection::rangeRphi = rphirecHits.get(idet) and loop
  // only from rangeRphi.first until rangeRphi.second
  for( istripSt=stripcollSt.begin(); istripSt!=stripcollSt.end(); ++istripSt ) {
    const SiStripRecHit2D *aHit = &*(istripSt);
    DetId mydet1 = aHit->geographicalId(); 
    if (idet.rawId() != mydet1.rawId()) continue; 
    float theDistance = ( therechit->localPosition() - aHit->localPosition() ).mag();
    // std::cout << "theDistance1 = " << theDistance << "\n";
    if (theDistance > 0.001 && theDistance < minHitIsolation_) return false;
  }
  
  // FIXME: see above
  for( istripStm=stripcollStm.begin(); istripStm!=stripcollStm.end(); ++istripStm ) {
    const SiStripMatchedRecHit2D *aHit = &*(istripStm);
    DetId mydet2 = aHit->geographicalId(); 
    if (idet.rawId() != mydet2.rawId()) continue;
    float theDistance = (therechit->localPosition() - aHit->localPosition()).mag();
    // std::cout << "theDistance1 = " << theDistance << "\n";
    if (theDistance > 0.001 && theDistance < minHitIsolation_) return false;
  }
  return true;
}

//-----------------------------------------------------------------------------

AlignmentTrackSelector::Tracks 
AlignmentTrackSelector::theNHighestPtTracks(const Tracks& tracks) const
{
  Tracks sortedTracks=tracks;
  Tracks result;

  // sort in pt
  std::sort(sortedTracks.begin(),sortedTracks.end(),ptComparator);

  // copy theTrackMult highest pt tracks to result vector
  int n=0;
  for (Tracks::const_iterator it=sortedTracks.begin();
       it!=sortedTracks.end(); ++it) {
    if (n<nHighestPt_) { result.push_back(*it); n++; }
  }

  return result;
}

//---------

AlignmentTrackSelector::Tracks 
AlignmentTrackSelector::checkPrescaledHits(const Tracks& tracks, const edm::Event& evt) const 
{
  Tracks result;

  //take Cluster-Flag Assomap
  edm::Handle<AliClusterValueMap> fMap;
  evt.getByToken( clusterValueMapToken_, fMap);
  const AliClusterValueMap &flagMap=*fMap;

  //for each track loop on hits and count the number of taken hits
  for (Tracks::const_iterator ittrk=tracks.begin(); ittrk != tracks.end(); ++ittrk) {
    const reco::Track* trackp=*ittrk;
    int ntakenhits=0;
    //    float pt=trackp->pt();

    for (trackingRecHit_iterator ith = trackp->recHitsBegin(), edh = trackp->recHitsEnd(); ith != edh; ++ith) {
      const TrackingRecHit *hit = (*ith); // ith is an iterator on edm::Ref to rechit
      if(! hit->isValid())continue;
      DetId detid = hit->geographicalId();
      int subDet = detid.subdetId();
      AlignmentClusterFlag flag;

      bool isPixelHit=(subDet == kFPIX || subDet == kBPIX);

      if (!isPixelHit){
    const std::type_info &type = typeid(*hit);

    if (type == typeid(SiStripRecHit2D)) {  
      const SiStripRecHit2D* striphit=dynamic_cast<const  SiStripRecHit2D*>(hit); 
      if(striphit!=0){
        SiStripRecHit2D::ClusterRef stripclust(striphit->cluster());
        flag = flagMap[stripclust];
      }
    }
    else if(type == typeid(SiStripRecHit1D)){
      const SiStripRecHit1D* striphit = dynamic_cast<const SiStripRecHit1D*>(hit);
      if(striphit!=0){
        SiStripRecHit1D::ClusterRef stripclust(striphit->cluster());
        flag = flagMap[stripclust];
      }
    } 
    else{
       edm::LogError("AlignmentTrackSelector")<<"ERROR in <AlignmentTrackSelector::checkPrescaledHits>: Dynamic cast of Strip RecHit failed!"
                          <<" Skipping this hit.";
       continue;
    }

      

      }//end if hit in Strips
      else{ // test explicitely BPIX/FPIX
    const SiPixelRecHit* pixelhit= dynamic_cast<const SiPixelRecHit*>(hit);
    if(pixelhit!=0){
      SiPixelRecHit::ClusterRef pixclust(pixelhit->cluster());
      flag = flagMap[pixclust];
    }
    else{
        edm::LogError("AlignmentTrackSelector")<<"ERROR in <AlignmentTrackSelector::checkPrescaledHits>: Dynamic cast of Pixel RecHit failed!  ";
    }
      }//end else hit is in Pixel
      
      if(flag.isTaken())ntakenhits++;

    }//end loop on hits
    if(ntakenhits >= minPrescaledHits_)result.push_back(trackp);
  }//end loop on tracks

  return result;
}//end checkPrescaledHits

//-----------------------------------------------------------------

bool AlignmentTrackSelector::isOkTrkQuality(const reco::Track* track) const
{
  bool qualityOk=false;
  bool iterStepOk=false;

  //check iterative step
  if(applyIterStepCheck_){
    for (unsigned int i = 0; i < trkSteps_.size(); ++i) {
      if (track->algo()==(trkSteps_[i])) {
    iterStepOk=true;
      }
    }
  }
  else iterStepOk=true;

  //check track quality
  if(applyTrkQualityCheck_){
    for (unsigned int i = 0; i < trkQualities_.size(); ++i) {
      if (track->quality(trkQualities_[i])) {
    qualityOk=true;
      }
    }
  }
  else  qualityOk=true;

  return qualityOk&&iterStepOk;
}//end check on track quality