GenMETExtractor.cc

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#include "PhysicsTools/PatAlgos/plugins/GenMETExtractor.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "FWCore/ParameterSet/interface/ParameterSetDescription.h"

#include <memory>

using namespace pat;

GenMETExtractor::GenMETExtractor(const edm::ParameterSet &iConfig) {
  edm::InputTag metIT = iConfig.getParameter<edm::InputTag>("metSource");
  metSrcToken_ = consumes<pat::METCollection>(metIT);

  // produces vector of genMet
  produces<std::vector<reco::GenMET> >();
}

GenMETExtractor::~GenMETExtractor() {}

void GenMETExtractor::produce(edm::StreamID streamID, edm::Event &iEvent, const edm::EventSetup &iSetup) const {
  edm::Handle<std::vector<pat::MET> > src;
  iEvent.getByToken(metSrcToken_, src);
  if (src->empty())
    edm::LogError("GenMETExtractor::produce") << "input genMET collection is empty";

  const reco::GenMET *genMet = src->front().genMET();

  std::vector<reco::GenMET> *genMetCol = new std::vector<reco::GenMET>();
  genMetCol->push_back((*genMet));

  std::unique_ptr<std::vector<reco::GenMET> > genMETs(genMetCol);
  iEvent.put(std::move(genMETs));
}

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

DEFINE_FWK_MODULE(GenMETExtractor);