TrackerCleaner.h

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#ifndef TauAnalysis_MCEmbeddingTools_TrackerCleaner_H
#define TauAnalysis_MCEmbeddingTools_TrackerCleaner_H

#include "FWCore/Framework/interface/stream/EDProducer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "DataFormats/Common/interface/Handle.h"
#include "DataFormats/PatCandidates/interface/Muon.h"
#include "DataFormats/MuonReco/interface/MuonEnergy.h"
#include "FWCore/Framework/interface/MakerMacros.h"

#include "TrackingTools/TrackAssociator/interface/TrackAssociatorParameters.h"
#include "TrackingTools/TrackAssociator/interface/TrackDetectorAssociator.h"
#include "TrackingTools/Records/interface/TrackingComponentsRecord.h"

#include "DataFormats/Common/interface/SortedCollection.h"
#include "DataFormats/Common/interface/DetSetVectorNew.h"
#include "DataFormats/TrackerRecHit2D/interface/BaseTrackerRecHit.h"
#include "DataFormats/TrackerRecHit2D/interface/OmniClusterRef.h"


#include <string>
#include <iostream>
#include <map>


template <typename T>
class TrackerCleaner : public edm::stream::EDProducer<>
{
 public:
  explicit TrackerCleaner(const edm::ParameterSet&);
  ~TrackerCleaner() override;

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

  const edm::EDGetTokenT<edm::View<pat::Muon> > mu_input_;
  typedef edmNew::DetSetVector<T> TrackClusterCollection;
   
  std::map<std::string,  edm::EDGetTokenT<TrackClusterCollection > > inputs_;
  
  bool match_rechit_type(const TrackingRecHit &murechit);


};

template <typename T>
TrackerCleaner<T>::TrackerCleaner(const edm::ParameterSet& iConfig) :
    mu_input_(consumes<edm::View<pat::Muon> >(iConfig.getParameter<edm::InputTag>("MuonCollection")))
  
{
  std::vector<edm::InputTag> inCollections =  iConfig.getParameter<std::vector<edm::InputTag> >("oldCollection");
  for (auto inCollection : inCollections){
     inputs_[inCollection.instance()] = consumes<TrackClusterCollection >(inCollection);
     produces<TrackClusterCollection>(inCollection.instance());
  }
    
  
}


template <typename T>
TrackerCleaner<T>::~TrackerCleaner()
{
// nothing to be done yet...  
}


template <typename T>
void TrackerCleaner<T>::produce(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  
   using namespace edm;
   
   edm::Handle< edm::View<pat::Muon> > muonHandle;
   iEvent.getByToken(mu_input_, muonHandle);
   edm::View<pat::Muon> muons = *muonHandle;
   
  for (auto input_ : inputs_){
   
   edm::Handle<TrackClusterCollection > inputClusters;
   iEvent.getByToken(input_.second, inputClusters);

   std::vector<bool> vetodClusters;

   vetodClusters.resize(inputClusters->dataSize(), false);

   for (edm::View<pat::Muon>::const_iterator iMuon = muons.begin(); iMuon != muons.end(); ++iMuon) {   
    if(!iMuon->isGlobalMuon() ) continue;
    const reco::Track* mutrack = iMuon->globalTrack().get();
  //  reco::Track *mutrack = new reco::Track(*(iMuon->innerTrack() ));
    for (trackingRecHit_iterator hitIt = mutrack->recHitsBegin(); hitIt != mutrack->recHitsEnd(); ++hitIt) {
        const TrackingRecHit &murechit = **hitIt;     
        if(!(murechit).isValid()) continue;
    
    if (match_rechit_type(murechit)){
      auto & thit = reinterpret_cast<BaseTrackerRecHit const&>(murechit);
          auto const & cluster = thit.firstClusterRef();
      vetodClusters[cluster.key()]=true;
    }
    
        
     }  
  }
  std::unique_ptr<TrackClusterCollection > output(new TrackClusterCollection());

    int idx = 0;
    for ( typename TrackClusterCollection::const_iterator clustSet = inputClusters->begin(); clustSet != inputClusters->end(); ++clustSet ) { 
      DetId detIdObject( clustSet->detId() );
      typename TrackClusterCollection::FastFiller spc(*output, detIdObject);
      for (typename edmNew::DetSet<T>::const_iterator clustIt = clustSet->begin(); clustIt != clustSet->end(); ++clustIt ) { 
        idx++;  
        if (vetodClusters[idx-1]) continue;
    //if (!vetodClusters[idx-1]) continue; for inverted selction
        spc.push_back(*clustIt);
      }
    }
    iEvent.put(std::move(output),input_.first);
  }
  
}
#endif