DuplicateListMerger.cc

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#include "RecoTracker/FinalTrackSelectors/interface/TrackCollectionCloner.h"


#include "FWCore/Framework/interface/global/EDProducer.h"
#include "FWCore/Utilities/interface/InputTag.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"


#include "DataFormats/TrackReco/interface/TrackFwd.h"
#include "DataFormats/TrackReco/interface/Track.h"


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

#include <vector>
#include <algorithm>
#include <string>
#include <iostream>
#include<memory>

// #include "TMVA/Reader.h"

#include "trackAlgoPriorityOrder.h"

using namespace reco;

namespace {
class DuplicateListMerger final : public edm::global::EDProducer<> {
 public:
  explicit DuplicateListMerger(const edm::ParameterSet& iPara);
  virtual ~DuplicateListMerger();
  
  using CandidateToDuplicate = std::vector<std::pair<int, int>>;
  
  using RecHitContainer = edm::OwnVector<TrackingRecHit>;
  
  using MVACollection = std::vector<float>;
  using QualityMaskCollection = std::vector<unsigned char>;
 

  static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);

  
 private:
  void produce(edm::StreamID, edm::Event &, const edm::EventSetup &) const override;
  
 private:  
  

  TrackCollectionCloner collectionCloner;
  TrackCollectionCloner::Tokens mergedTrackSource_;
  TrackCollectionCloner::Tokens originalTrackSource_;


  edm::EDGetTokenT<CandidateToDuplicate> candidateComponents_;
  edm::EDGetTokenT<std::vector<TrackCandidate>> candidateSource_;
     
  edm::EDGetTokenT<MVACollection> originalMVAValsToken_;
  edm::EDGetTokenT<MVACollection> mergedMVAValsToken_;

  int diffHitsCut_;
 

};
}

#include "TrackingTools/PatternTools/interface/Trajectory.h"
#include "TrackingTools/PatternTools/interface/TrajTrackAssociation.h"
#include "DataFormats/TrajectorySeed/interface/TrajectorySeedCollection.h"
#include "DataFormats/TrackerRecHit2D/interface/ClusterRemovalRefSetter.h"

#include "FWCore/Framework/interface/Event.h"
#include "CommonTools/Statistics/interface/ChiSquaredProbability.h"

#include<tuple>
#include<array>
#include "CommonTools/Utils/interface/DynArray.h"


namespace {
void DuplicateListMerger::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
  edm::ParameterSetDescription desc;
  desc.add<edm::InputTag>("mergedSource",edm::InputTag());
  desc.add<edm::InputTag>("originalSource",edm::InputTag());
  desc.add<edm::InputTag>("mergedMVAVals",edm::InputTag());
  desc.add<edm::InputTag>("originalMVAVals",edm::InputTag());
  desc.add<edm::InputTag>("candidateSource",edm::InputTag());
  desc.add<edm::InputTag>("candidateComponents",edm::InputTag());
  desc.add<int>("diffHitsCut",5);
  descriptions.add("DuplicateListMerger", desc);  
}

DuplicateListMerger::DuplicateListMerger(const edm::ParameterSet& iPara) :
  collectionCloner(*this, iPara, true),
  mergedTrackSource_(iPara.getParameter<edm::InputTag>("mergedSource"),consumesCollector()),
  originalTrackSource_(iPara.getParameter<edm::InputTag>("originalSource"),consumesCollector())
{
  
  diffHitsCut_ = iPara.getParameter<int>("diffHitsCut");
  candidateSource_ = consumes<std::vector<TrackCandidate> >(iPara.getParameter<edm::InputTag>("candidateSource"));
  candidateComponents_ = consumes<CandidateToDuplicate>(iPara.getParameter<edm::InputTag>("candidateComponents"));

  mergedMVAValsToken_ = consumes<MVACollection>(iPara.getParameter<edm::InputTag>("mergedMVAVals"));
  originalMVAValsToken_ = consumes<MVACollection>(iPara.getParameter<edm::InputTag>("originalMVAVals"));

  

  produces<MVACollection>("MVAValues");
  produces<QualityMaskCollection>("QualityMasks");


}

DuplicateListMerger::~DuplicateListMerger()
{

  /* no op */

}

void DuplicateListMerger::produce(edm::StreamID, edm::Event& iEvent, const edm::EventSetup& iSetup) const
{

  TrackCollectionCloner::Producer producer(iEvent, collectionCloner);

  
 
  auto const & originals = originalTrackSource_.tracks(iEvent);
  auto const & merged = mergedTrackSource_.tracks(iEvent);
  auto const & candIndices = mergedTrackSource_.indicesInput(iEvent);
  
  edm::Handle<std::vector<TrackCandidate>> candidateH;
  iEvent.getByToken(candidateSource_,candidateH);
  auto const & candidates = *candidateH;

  edm::Handle<CandidateToDuplicate>  candidateComponentsH;
  iEvent.getByToken(candidateComponents_,candidateComponentsH);
  auto const & candidateComponents = *candidateComponentsH;


  
  edm::Handle<MVACollection> originalMVAStore;
  edm::Handle<MVACollection> mergedMVAStore;

  iEvent.getByToken(originalMVAValsToken_,originalMVAStore);
  iEvent.getByToken(mergedMVAValsToken_,mergedMVAStore);

  MVACollection mvaVec;


  auto mergedMVA = *mergedMVAStore;

  //match new tracks to their candidates
  std::vector<std::array<int,3>> matches;
  for(int i = 0; i < (int)merged.size(); ++i) {
    auto cInd = candIndices[i];
    auto const & cand = candidates[cInd];
    const reco::Track& matchedTrack = merged[i];

    if (mergedMVA[i]< -0.7f) continue;  // at least "loose"  ( FIXME: take cut value from CutSelector)

    // if( ChiSquaredProbability(matchedTrack.chi2(),matchedTrack.ndof()) < minTrkProbCut_)continue;
    int dHits = (cand.recHits().second - cand.recHits().first) - matchedTrack.recHitsSize();
    if(dHits > diffHitsCut_)continue;
    matches.push_back(std::array<int,3>{{i,candidateComponents[cInd].first,candidateComponents[cInd].second}});
  }

  //check for candidates/tracks that share merged tracks, select minimum chi2, remove the rest
  if (matches.size()>1) 
    for ( auto matchIter0 = matches.begin(); matchIter0 != matches.end()-1; ++matchIter0) {
      if ( (*matchIter0)[0]<0) continue;
      auto nchi2 = merged[(*matchIter0)[0]].normalizedChi2();
      for( auto matchIter1 = matchIter0+1; matchIter1 != matches.end(); ++matchIter1){
    if ( (*matchIter1)[0]<0) continue;
    if ( (*matchIter0)[1]==(*matchIter1)[1]
         || (*matchIter0)[1]==(*matchIter1)[2]
         || (*matchIter0)[2]==(*matchIter1)[1]
         || (*matchIter0)[2]==(*matchIter1)[2]
         ) {
      auto nchi2_1 = merged[(*matchIter1)[0]].normalizedChi2();
      if(nchi2_1 < nchi2){
        (*matchIter0)[0] = -1;
        break;
      }else{
        (*matchIter1)[0] = -1;
      }
    }
      }
    }


  // products
  auto pmvas = std::make_unique<MVACollection>();
  auto pquals = std::make_unique<QualityMaskCollection>();
  

  //add the good merged tracks to the output list, remove input tracks
  std::vector<int> inputTracks;


  std::vector<unsigned int> selId;
  auto ntotTk = matches.size();
  // declareDynArray(reco::TrackBase::TrackAlgorithm, ntotTk, algo);
  declareDynArray(reco::TrackBase::TrackAlgorithm, ntotTk, oriAlgo);
  declareDynArray(reco::TrackBase::AlgoMask, ntotTk,  algoMask);

  auto nsel=0U;
  for(auto matchIter0 = matches.begin(); matchIter0 != matches.end(); matchIter0++){
    if ( (*matchIter0)[0]<0) continue;
    selId.push_back((*matchIter0)[0]);

    pmvas->push_back(mergedMVA[(*matchIter0)[0]]);
     
    const reco::Track& inTrk1 = originals[(*matchIter0)[1]];
    const reco::Track& inTrk2 = originals[(*matchIter0)[2]];
    oriAlgo[nsel] = std::min(inTrk1.algo(),inTrk2.algo(),
                 [](reco::TrackBase::TrackAlgorithm a, reco::TrackBase::TrackAlgorithm b) {
                   return trackAlgoPriorityOrder[a] < trackAlgoPriorityOrder[b];
                 });


    algoMask[nsel] = inTrk1.algoMask() | inTrk2.algoMask();
    
    pquals->push_back((inTrk1.qualityMask() | inTrk2.qualityMask()));
    pquals->back() |= (1<<reco::TrackBase::confirmed);
    
    inputTracks.push_back((*matchIter0)[1]);
    inputTracks.push_back((*matchIter0)[2]);

 
    ++nsel;
    
  }

  
  producer(mergedTrackSource_,selId);
  assert(producer.selTracks_->size()==pquals->size());
  
  for (auto isel=0U;isel<nsel;++isel) {
    algoMask[isel].set(reco::TrackBase::duplicateMerge);
    auto & otk = (*producer.selTracks_)[isel];
    otk.setQualityMask((*pquals)[isel]);
    otk.setAlgorithm(reco::TrackBase::duplicateMerge);
    otk.setOriginalAlgorithm(oriAlgo[isel]);
    otk.setAlgoMask(algoMask[isel]);
  }

  
  selId.clear();
  for(int i = 0; i < (int)originals.size(); i++){
    const reco::Track& origTrack = originals[i];
    if (std::find(inputTracks.begin(),inputTracks.end(),i) != inputTracks.end()) continue;
    selId.push_back(i);
    pmvas->push_back((*originalMVAStore)[i]);
    pquals->push_back(origTrack.qualityMask());
  }

  producer(originalTrackSource_,selId);
  assert(producer.selTracks_->size()==pquals->size());

  iEvent.put(std::move(pmvas),"MVAValues");
  iEvent.put(std::move(pquals),"QualityMasks");


}

}

#include "FWCore/PluginManager/interface/ModuleDef.h"
#include "FWCore/Framework/interface/MakerMacros.h"

DEFINE_FWK_MODULE(DuplicateListMerger);