GenericPairGenerator.cc

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#include "RecoTracker/SpecialSeedGenerators/interface/GenericPairGenerator.h"
//#include "RecoTracker/TkSeedingLayers/interface/SeedingLayerSetsBuilder.h"
typedef SeedingHitSet::ConstRecHitPointer SeedingHit;

#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "TrackingTools/TransientTrackingRecHit/interface/SeedingLayerSetsHits.h"
using namespace ctfseeding;


GenericPairGenerator::GenericPairGenerator(const edm::ParameterSet& conf, edm::ConsumesCollector& iC):
  theSeedingLayerToken(iC.consumes<SeedingLayerSetsHits>(conf.getParameter<edm::InputTag>("LayerSrc"))) {
    edm::LogInfo("CtfSpecialSeedGenerator|GenericPairGenerator") << "Constructing GenericPairGenerator";
} 


const OrderedSeedingHits& GenericPairGenerator::run(const TrackingRegion& region,
                                        const edm::Event& e,
                                            const edm::EventSetup& es){
    hitPairs.clear();
    hitPairs.reserve(0);
        edm::Handle<SeedingLayerSetsHits> hlayers;
        e.getByToken(theSeedingLayerToken, hlayers);
        const SeedingLayerSetsHits& layers = *hlayers;
        if(layers.numberOfLayersInSet() != 2)
          throw cms::Exception("CtfSpecialSeedGenerator") << "You are using " << layers.numberOfLayersInSet() <<" layers in set instead of 2 ";

        for(SeedingLayerSetsHits::SeedingLayerSet ls: layers) {
        auto innerHits  = region.hits(es, ls[0]);
        auto outerHits  = region.hits(es, ls[1]);
        for (auto iOuterHit = outerHits.begin(); iOuterHit != outerHits.end(); iOuterHit++){
          for (auto iInnerHit = innerHits.begin(); iInnerHit != innerHits.end(); iInnerHit++){
            hitPairs.push_back(OrderedHitPair(&(**iInnerHit),
                              &(**iOuterHit))
                       );
          }
        }
        }
    return hitPairs;
}