/data/refman/pasoursint/CMSSW_4_1_8_patch13/src/RecoLocalTracker/SiStripRecHitConverter/src/SiStripRecHitConverterAlgorithm.cc

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#include "RecoLocalTracker/SiStripRecHitConverter/interface/SiStripRecHitConverterAlgorithm.h"
#include "RecoLocalTracker/Records/interface/TkStripCPERecord.h"
#include "CalibTracker/Records/interface/SiStripQualityRcd.h"

#include "Geometry/TrackerGeometryBuilder/interface/GluedGeomDet.h"
#include "Geometry/TrackerGeometryBuilder/interface/StripGeomDetUnit.h"

#include "DataFormats/SiStripDetId/interface/StripSubdetector.h"
#include "DataFormats/Common/interface/RefGetter.h"
#include "DataFormats/Common/interface/Ref.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/Utilities/interface/typelookup.h"
TYPELOOKUP_DATA_REG(SiStripRecHitMatcher);


SiStripRecHitConverterAlgorithm::SiStripRecHitConverterAlgorithm(const edm::ParameterSet& conf) : 
  useQuality(conf.getParameter<bool>("useSiStripQuality")),
  maskBad128StripBlocks( conf.existsAs<bool>("MaskBadAPVFibers") && conf.getParameter<bool>("MaskBadAPVFibers")),
  tracker_cache_id(0),
  cpe_cache_id(0),
  quality_cache_id(0),
  cpeTag(conf.getParameter<edm::ESInputTag>("StripCPE")),
  matcherTag(conf.getParameter<edm::ESInputTag>("Matcher")),
  qualityTag(conf.getParameter<edm::ESInputTag>("siStripQualityLabel"))
{}

void SiStripRecHitConverterAlgorithm::
initialize(const edm::EventSetup& es) 
{
  uint32_t tk_cache_id = es.get<TrackerDigiGeometryRecord>().cacheIdentifier();
  uint32_t c_cache_id = es.get<TkStripCPERecord>().cacheIdentifier();
  uint32_t q_cache_id = es.get<SiStripQualityRcd>().cacheIdentifier();

  if(tk_cache_id != tracker_cache_id) {
    es.get<TrackerDigiGeometryRecord>().get(tracker);
    tracker_cache_id = tk_cache_id;
  }
  if(c_cache_id != cpe_cache_id) {
    es.get<TkStripCPERecord>().get(matcherTag, matcher);
    es.get<TkStripCPERecord>().get(cpeTag, parameterestimator); 
    cpe_cache_id = c_cache_id;
  }
  if( useQuality && q_cache_id!=quality_cache_id) {
    es.get<SiStripQualityRcd>().get(qualityTag, quality);
    quality_cache_id = q_cache_id;
  }
}

void SiStripRecHitConverterAlgorithm::
run(edm::Handle<edmNew::DetSetVector<SiStripCluster> > input, products& output) 
{ run(input, output, LocalVector(0.,0.,0.)); }

void SiStripRecHitConverterAlgorithm::
run(edm::Handle<edmNew::DetSetVector<SiStripCluster> > inputhandle, products& output, LocalVector trackdirection)
{
  for (edmNew::DetSetVector<SiStripCluster>::const_iterator 
         DS = inputhandle->begin(); DS != inputhandle->end(); DS++ ) {     if(!useModule(DS->id())) continue;

    Collector collector = StripSubdetector(DS->id()).stereo()  
      ? Collector(*output.stereo, DS->id()) 
      : Collector(*output.rphi,   DS->id());
    bool bad128StripBlocks[6]; fillBad128StripBlocks( DS->id(), bad128StripBlocks);
    

    for(edmNew::DetSet<SiStripCluster>::const_iterator 
          cluster = DS->begin();  cluster != DS->end(); ++cluster ) {     if(isMasked(*cluster,bad128StripBlocks)) continue;

      StripClusterParameterEstimator::LocalValues parameters =  parameterestimator->localParameters(*cluster,*(tracker->idToDetUnit(DS->id())));
      collector.push_back(SiStripRecHit2D( parameters.first, parameters.second, DS->id(), edmNew::makeRefTo(inputhandle,cluster) ));
    }

    if (collector.empty()) collector.abort();
  }
  match(output,trackdirection);
}

void SiStripRecHitConverterAlgorithm::
run(edm::Handle<edm::RefGetter<SiStripCluster> >  refGetterhandle, 
    edm::Handle<edm::LazyGetter<SiStripCluster> >  lazyGetterhandle, 
    products& output)
{
  bool bad128StripBlocks[6];
  bool goodDet=true;
  DetId lastId(0);
  std::auto_ptr<Collector> collector(new Collector(*output.stereo, lastId));
  
  edm::RefGetter<SiStripCluster>::const_iterator iregion = refGetterhandle->begin();
  for(;iregion!=refGetterhandle->end();++iregion) {
    const edm::RegionIndex<SiStripCluster>& region = *iregion;
    const uint32_t start = region.start();
    const uint32_t finish = region.finish();
    for (uint32_t i = start; i < finish; i++) {
      edm::RegionIndex<SiStripCluster>::const_iterator icluster = region.begin()+(i-start);
      
      DetId detId(icluster->geographicalId());
      if(detId != lastId) {
        if(collector->empty()) collector->abort();
        lastId = detId;
        goodDet = useModule(detId);
        if(goodDet) {
          fillBad128StripBlocks(detId, bad128StripBlocks);
          collector = StripSubdetector(detId).stereo()  
            ? std::auto_ptr<Collector>(new Collector(*output.stereo, detId)) 
            : std::auto_ptr<Collector>(new Collector(*output.rphi,   detId));
        }
      }
      if( !goodDet || isMasked(*icluster, bad128StripBlocks)) continue;

      StripClusterParameterEstimator::LocalValues parameters = parameterestimator->localParameters(*icluster,*(tracker->idToDetUnit(detId)));
      collector->push_back(SiStripRecHit2D( parameters.first, parameters.second, detId, makeRefToLazyGetter(lazyGetterhandle,i) ));      
    }
    if(collector->empty()) collector->abort();
  }
  match(output,LocalVector(0.,0.,0.));
}


namespace {

  struct CollectorHelper {
    bool regional;
    size_t nmatch;
    
    
    typedef edm::OwnVector<SiStripMatchedRecHit2D> CollectorMatched;
    typedef SiStripMatchedRecHit2DCollection::FastFiller Collector;
    
    Collector & m_collector;
    CollectorMatched & m_collectorMatched;
    SiStripRecHit2DCollection::FastFiller & m_fillerRphiUnm;
    std::vector<SiStripRecHit2D::ClusterRef::key_type>         & m_matchedSteroClusters;
    std::vector<SiStripRecHit2D::ClusterRegionalRef::key_type> & m_matchedSteroClustersRegional;
    
    static inline SiStripRecHit2D const & stereoHit(edmNew::DetSet<SiStripRecHit2D>::const_iterator iter) {
      return *iter;
    }
    
    static inline SiStripRecHit2D const & monoHit(edmNew::DetSet<SiStripRecHit2D>::const_iterator iter) {
      return *iter;
    }
    
    struct Add {
      Add(CollectorHelper& ih) : h(ih){}
      CollectorHelper& h;
      void operator()(SiStripMatchedRecHit2D const & rh) { h.m_collectorMatched.push_back(rh);}
    };

    CollectorHelper & collector() {
      return *this;
    }

   void operator()(SiStripMatchedRecHit2D const & rh) {m_collectorMatched.push_back(rh);}


    CollectorHelper(
                    Collector & i_collector,
                    CollectorMatched & i_collectorMatched,
                    SiStripRecHit2DCollection::FastFiller & i_fillerRphiUnm,
                    std::vector<SiStripRecHit2D::ClusterRef::key_type>         & i_matchedSteroClusters,
                    std::vector<SiStripRecHit2D::ClusterRegionalRef::key_type> & i_matchedSteroClustersRegional
                    ) : regional(false), nmatch(0), 
                        m_collector(i_collector),
                        m_collectorMatched(i_collectorMatched),
                        m_fillerRphiUnm(i_fillerRphiUnm),
                        m_matchedSteroClusters(i_matchedSteroClusters),
                        m_matchedSteroClustersRegional(i_matchedSteroClustersRegional)
    {}
    
    void closure(edmNew::DetSet<SiStripRecHit2D>::const_iterator it) {
      if (!m_collectorMatched.empty()){
        nmatch+=m_collectorMatched.size();
        for (edm::OwnVector<SiStripMatchedRecHit2D>::const_iterator itm = m_collectorMatched.begin(),
               edm = m_collectorMatched.end();
             itm != edm; 
             ++itm) {
          m_collector.push_back(*itm);
          // mark the stereo hit cluster as used, so that the hit won't go in the unmatched stereo ones
          if (itm->stereoHit()->cluster().isNonnull()) {
            m_matchedSteroClusters.push_back(itm->stereoHit()->cluster().key()); 
          } else {
            m_matchedSteroClustersRegional.push_back(itm->stereoHit()->cluster_regional().key()); 
            regional = true;
          }
        }
        m_collectorMatched.clear();
      } else {
        // store a copy of this rphi hit as an unmatched rphi hit
        m_fillerRphiUnm.push_back(*it);
      }
    }
  };
}


void SiStripRecHitConverterAlgorithm::
match(products& output, LocalVector trackdirection) const 
{
  int nmatch=0;
  edm::OwnVector<SiStripMatchedRecHit2D> collectorMatched; // gp/FIXME: avoid this
  
  // Remember the ends of the collections, as we will use them a lot
  SiStripRecHit2DCollection::const_iterator edStereoDet = output.stereo->end();
  SiStripRecHit2DCollection::const_iterator edRPhiDet   = output.rphi->end();
  
  // two work vectors for bookeeping clusters used by the stereo part of the matched hits
  std::vector<SiStripRecHit2D::ClusterRef::key_type>         matchedSteroClusters;
  std::vector<SiStripRecHit2D::ClusterRegionalRef::key_type> matchedSteroClustersRegional;
  
  for (SiStripRecHit2DCollection::const_iterator itRPhiDet = output.rphi->begin(); itRPhiDet != edRPhiDet; ++itRPhiDet) {
    edmNew::DetSet<SiStripRecHit2D> rphiHits = *itRPhiDet;
    StripSubdetector specDetId(rphiHits.detId());
    uint32_t partnerId = specDetId.partnerDetId();
    
    // if not part of a glued pair
    if (partnerId == 0) { 
      // I must copy these as unmatched 
      if (!rphiHits.empty()) {
        SiStripRecHit2DCollection::FastFiller filler(*output.rphiUnmatched, rphiHits.detId());
        filler.resize(rphiHits.size());
        std::copy(rphiHits.begin(), rphiHits.end(), filler.begin());
      }
      continue;
    }
    
    SiStripRecHit2DCollection::const_iterator itStereoDet = output.stereo->find(partnerId);
    
    // if the partner is not found (which probably can happen if it's empty)
    if (itStereoDet == edStereoDet) {
      // I must copy these as unmatched 
      if (!rphiHits.empty()) {
        SiStripRecHit2DCollection::FastFiller filler(*output.rphiUnmatched, rphiHits.detId());
        filler.resize(rphiHits.size());
        std::copy(rphiHits.begin(), rphiHits.end(), filler.begin());
      }
      continue;
    }
    
    edmNew::DetSet<SiStripRecHit2D> stereoHits = *itStereoDet;
    
     
    // Get ready for making glued hits
    const GluedGeomDet* gluedDet = (const GluedGeomDet*)tracker->idToDet(DetId(specDetId.glued()));
    typedef SiStripMatchedRecHit2DCollection::FastFiller Collector;
    Collector collector(*output.matched, specDetId.glued());
    
    // Prepare also the list for unmatched rphi hits
    SiStripRecHit2DCollection::FastFiller fillerRphiUnm(*output.rphiUnmatched, rphiHits.detId());
    
    // a list of clusters used by the matched part of the stereo hits in this detector
    matchedSteroClusters.clear();          // at the beginning, empty
    matchedSteroClustersRegional.clear();  // I need two because the refs can be different
    bool regional = false;                 // I also want to remember if they come from standard or HLT reco

#ifdef DOUBLE_MATCH
    CollectorHelper chelper(collector, collectorMatched,
                    fillerRphiUnm,
                    matchedSteroClusters,matchedSteroClustersRegional
                    );
    matcher->doubleMatch(rphiHits.begin(), rphiHits.end(), 
                         stereoHits.begin(),stereoHits.end(),gluedDet,trackdirection,chelper);
    regional = chelper.regional;
    nmatch+=chelper.nmatch;
#else 
   // Make simple collection of this (gp:FIXME: why do we need it?)
    SiStripRecHitMatcher::SimpleHitCollection stereoSimpleHits;
    // gp:FIXME: use std::transform 
    stereoSimpleHits.reserve(stereoHits.size());
    for (edmNew::DetSet<SiStripRecHit2D>::const_iterator it = stereoHits.begin(), ed = stereoHits.end(); it != ed; ++it) {
      stereoSimpleHits.push_back(&*it);
    }

    for (edmNew::DetSet<SiStripRecHit2D>::const_iterator it = rphiHits.begin(), ed = rphiHits.end(); it != ed; ++it) {
      matcher->match(&(*it),stereoSimpleHits.begin(),stereoSimpleHits.end(),collectorMatched,gluedDet,trackdirection);
      if (collectorMatched.size()>0){
        nmatch+=collectorMatched.size();
        for (edm::OwnVector<SiStripMatchedRecHit2D>::const_iterator itm = collectorMatched.begin(),
               edm = collectorMatched.end();
             itm != edm; 
             ++itm) {
          collector.push_back(*itm);
          // mark the stereo hit cluster as used, so that the hit won't go in the unmatched stereo ones
          if (itm->stereoHit()->cluster().isNonnull()) {
            matchedSteroClusters.push_back(itm->stereoHit()->cluster().key()); 
          } else {
            matchedSteroClustersRegional.push_back(itm->stereoHit()->cluster_regional().key()); 
            regional = true;
          }
        }
        collectorMatched.clear();
      } else {
        // store a copy of this rphi hit as an unmatched rphi hit
        fillerRphiUnm.push_back(*it);
      }
    }
    
#endif


    // discard matched hits if the collection is empty
    if (collector.empty()) collector.abort();
    
    // discard unmatched rphi hits if there are none
    if (fillerRphiUnm.empty()) fillerRphiUnm.abort();
    
    // now look for unmatched stereo hits    
    SiStripRecHit2DCollection::FastFiller fillerStereoUnm(*output.stereoUnmatched, stereoHits.detId());
    if (!regional) {
      std::sort(matchedSteroClusters.begin(), matchedSteroClusters.end());
      for (edmNew::DetSet<SiStripRecHit2D>::const_iterator it = stereoHits.begin(), ed = stereoHits.end(); it != ed; ++it) {
        if (!std::binary_search(matchedSteroClusters.begin(), matchedSteroClusters.end(), it->cluster().key())) {
          fillerStereoUnm.push_back(*it);
        }
      }
    } else {
      std::sort(matchedSteroClustersRegional.begin(), matchedSteroClustersRegional.end());
      for (edmNew::DetSet<SiStripRecHit2D>::const_iterator it = stereoHits.begin(), ed = stereoHits.end(); it != ed; ++it) {
        if (!std::binary_search(matchedSteroClustersRegional.begin(), matchedSteroClustersRegional.end(), it->cluster_regional().key())) {
          fillerStereoUnm.push_back(*it);
        }
      }
    }
    if (fillerStereoUnm.empty()) fillerStereoUnm.abort(); 
    
    
  }
  
  for (SiStripRecHit2DCollection::const_iterator itStereoDet = output.stereo->begin(); itStereoDet != edStereoDet; ++itStereoDet) {
    edmNew::DetSet<SiStripRecHit2D> stereoHits = *itStereoDet;
    StripSubdetector specDetId(stereoHits.detId());
    uint32_t partnerId = specDetId.partnerDetId();
    if (partnerId == 0) continue;
    SiStripRecHit2DCollection::const_iterator itRPhiDet = output.rphi->find(partnerId);
    if (itRPhiDet == edRPhiDet) {
      if (!stereoHits.empty()) {
        SiStripRecHit2DCollection::FastFiller filler(*output.stereoUnmatched, stereoHits.detId());
        filler.resize(stereoHits.size());
        std::copy(stereoHits.begin(), stereoHits.end(), filler.begin());
      }
    }
  }
  
  edm::LogInfo("SiStripRecHitConverter") 
    << "found\n"         
    << nmatch 
    << "  matched RecHits\n";
}

void SiStripRecHitConverterAlgorithm::
fillBad128StripBlocks(const uint32_t detid, bool bad128StripBlocks[6] ) const 
{
  if(maskBad128StripBlocks) {
    short badApvs   = quality->getBadApvs(detid);
    short badFibers = quality->getBadFibers(detid);
    for (int j = 0; j < 6; j++) {
      bad128StripBlocks[j] = (badApvs & (1 << j));
    }
    for (int j = 0; j < 3; j++) {
      if (badFibers & (1 << j)) {
        bad128StripBlocks[2*j+0] = true;
        bad128StripBlocks[2*j+1] = true;
      }
    }
  }
}

inline
bool SiStripRecHitConverterAlgorithm::
isMasked(const SiStripCluster &cluster, bool bad128StripBlocks[6]) const 
{
  if(maskBad128StripBlocks) {
    if ( bad128StripBlocks[cluster.firstStrip() >> 7] ) {
      if ( bad128StripBlocks[(cluster.firstStrip()+cluster.amplitudes().size())  >> 7] ||
           bad128StripBlocks[static_cast<int32_t>(cluster.barycenter()-0.499999) >> 7] ) {
        return true;
      }
    } else {
      if ( bad128StripBlocks[(cluster.firstStrip()+cluster.amplitudes().size())  >> 7] &&
           bad128StripBlocks[static_cast<int32_t>(cluster.barycenter()-0.499999) >> 7] ) {
        return true;
      }
    }
  }
  return false;
}

inline
bool SiStripRecHitConverterAlgorithm::
useModule(const uint32_t id) const
{
  const StripGeomDetUnit * stripdet=(const StripGeomDetUnit*)tracker->idToDetUnit(id);
  if(stripdet==0) edm::LogWarning("SiStripRecHitConverter") << "Detid=" << id << " not found";
  return stripdet!=0 && (!useQuality || quality->IsModuleUsable(id));
}