/data/refman/pasoursint/CMSSW_6_1_2_SLHC2/src/RecoTracker/CkfPattern/src/CachingSeedCleanerBySharedInput.cc

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#include "RecoTracker/CkfPattern/interface/CachingSeedCleanerBySharedInput.h"

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

#include "DataFormats/TrajectorySeed/interface/TrajectorySeed.h"

#include "DataFormats/SiPixelDetId/interface/PixelSubdetector.h"

#include<boost/bind.hpp>
#include<algorithm>

void CachingSeedCleanerBySharedInput::init(const std::vector<Trajectory> *vect) { 
    theVault.clear(); theCache.clear();
}

void CachingSeedCleanerBySharedInput::done() { 
    //edm::LogInfo("CachingSeedCleanerBySharedInput") << " Calls: " << calls_ << ", Tracks: " << tracks_ <<", Comps: " << comps_ << " Vault: " << theVault.size() << ".";
    //calls_ = comps_ = tracks_ = 0;
    theVault.clear(); theCache.clear();

    //don't, at least we'll not copy vector by value!

    //    std::vector<Trajectory::RecHitContainer> swapper;
    //swapper.swap(theVault); // this should clean the vault even more
}



void CachingSeedCleanerBySharedInput::add(const Trajectory *trj) {
    typedef Trajectory::RecHitContainer::const_iterator TI;
    unsigned int idx = theVault.size();
    theVault.resize(idx+1);
    // a vector of shared pointers....
    Trajectory::ConstRecHitContainer & hits = theVault.back();
    (*trj).validRecHits(hits);
    //    std::sort(hits.begin(),hits.end(),
    //        boost::bind(&TrackingRecHit::geographicalId(),_1));
    
    uint32_t detid;
    for (TI t = hits.begin(), te = hits.end(); t != te; ++t) {
      //    if ((*t)->isValid()) {   // they are valid!
      detid = (*t)->geographicalId().rawId();

      //For seeds that are made only of pixel hits, it is pointless to store the 
      //information about hits on other sub-detector of the trajectory.
      if( theOnlyPixelHits && 
          (*t)->geographicalId().subdetId() != PixelSubdetector::PixelBarrel && 
          (*t)->geographicalId().subdetId() != PixelSubdetector::PixelEndcap    ) continue;
      if (detid) theCache.insert(std::pair<uint32_t, unsigned int>(detid, idx));
    }
}

bool CachingSeedCleanerBySharedInput::good(const TrajectorySeed *seed) {
  if (seed->nHits()==0){    return true; }

    typedef TrajectorySeed::const_iterator SI;
    typedef Trajectory::RecHitContainer::const_iterator TI;
    TrajectorySeed::range range = seed->recHits();

    SI first = range.first, last = range.second, curr;
    uint32_t detid = first->geographicalId().rawId();
    
    //std::multimap<uint32_t, unsigned int>::const_iterator it, end = theCache.end();
    typedef boost::unordered_multimap<uint32_t, unsigned int>::const_iterator IT;
    IT it; std::pair<IT,IT> itrange;
    

    //calls_++;
    //for (it = theCache.find(detid); (it != end) && (it->first == detid); ++it) {
    for (itrange = theCache.equal_range(detid), it = itrange.first; it != itrange.second; ++it) {
      assert(it->first == detid);
      //tracks_++;
      
      // seeds are limited to the first "theNumHitsForSeedCleaner" hits in trajectory...
      int ext = std::min(theNumHitsForSeedCleaner,int(theVault[it->second].size()));
      TI te =  theVault[it->second].begin()+ext;
      //    TI  te = theVault[it->second].end();
      
      TI ts = theVault[it->second].begin();
      TI t = ts;
      for (curr = first; curr != last; ++curr) {
        bool found = false;
        // for (TI t = ts; t != te; ++t) {
        for (;t != te; ++t) {
          //comps_++;
          if ( curr->sharesInput((**t).hit(),TrackingRecHit::all) ) { found = true; ++t; break; }
        }
        if (!found) break;
      }
      if (curr == last) return false;
    }
    return true;
}