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// system include files
#include <memory>
// user include files
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/one/EDAnalyzer.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "SimDataFormats/CaloHit/interface/PCaloHitContainer.h"
#include "DataFormats/HepMCCandidate/interface/GenParticle.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "CommonTools/UtilAlgos/interface/TFileService.h"
#include "TTree.h"
class TreeWriterForEcalCorrection : public edm::one::EDAnalyzer<edm::one::SharedResources> {
public:
explicit TreeWriterForEcalCorrection(const edm::ParameterSet&);
~TreeWriterForEcalCorrection() override = default;
static void fillDescriptions(edm::ConfigurationDescriptions& descriptions);
private:
void analyze(const edm::Event&, const edm::EventSetup&) override;
const edm::EDGetTokenT<reco::GenParticleCollectio> tok_gen_;
const edm::EDGetTokenT<edm::PCaloHitContainer> tok_ebf_;
const edm::EDGetTokenT<edm::PCaloHitContainer> tok_eef_;
const edm::EDGetTokenT<edm::PCaloHitContainer> tok_esf_;
const edm::EDGetTokenT<edm::PCaloHitContainer> tok_ebs_;
const edm::EDGetTokenT<edm::PCaloHitContainer> tok_ees_;
const edm::EDGetTokenT<edm::PCaloHitContainer> tok_ess_;
TTree* tree_;
float tree_e_, tree_eta_, tree_response_;
};
TreeWriterForEcalCorrection::TreeWriterForEcalCorrection(const edm::ParameterSet& iConfig)
: tok_gen_(consumes<reco::GenParticleCollectio>(edm::InputTag("genParticles", ""))),
tok_ebf_(consumes<edm::PCaloHitContainer>(edm::InputTag("fastSimProducer", "EcalHitsEB"))),
tok_eef_(consumes<edm::PCaloHitContainer>(edm::InputTag("fastSimProducer", "EcalHitsEE"))),
tok_esf_(consumes<edm::PCaloHitContainer>(edm::InputTag("fastSimProducer", "EcalHitsES"))),
tok_ebs_(consumes<edm::PCaloHitContainer>(edm::InputTag("g4SimHits", "EcalHitsEB"))),
tok_ees_(consumes<edm::PCaloHitContainer>(edm::InputTag("g4SimHits", "EcalHitsEE"))),
tok_ess_(consumes<edm::PCaloHitContainer>(edm::InputTag("g4SimHits", "EcalHitsES"))) {
usesResource(TFileService::kSharedResource);
edm::Service<TFileService> file;
tree_ = file->make<TTree>("responseTree", "same info as 3dhisto");
tree_->Branch("e", &tree_e_, "e/F");
tree_->Branch("eta", &tree_eta_, "eta/F");
tree_->Branch("r", &tree_response_, "r/F");
}
void TreeWriterForEcalCorrection::analyze(const edm::Event& iEvent, const edm::EventSetup& iSetup) {
// get generated particles
const edm::Handle<reco::GenParticleCollection>& GenParticles = iEvent.getHandle(tok_gen_);
// As this module is intended for single particle guns, there should be
// exactly one generated particle.
if (GenParticles->size() != 1) {
throw cms::Exception("MismatchedInputFiles") << "Intended for particle guns only\n";
}
// I assume here that the tracker simulation is disabled and no vertex
// smearing is done, so that the generated particles is exactly the same
// particle as the particle hitting the entrace of the ECAL.
reco::GenParticle gen = GenParticles->at(0);
float genE = gen.energy();
float genEta = gen.eta();
// genEta is positive for my photongun sample per definition.
// If not, you could take the absolute value here.
// get sim hits
edm::Handle<edm::PCaloHitContainer> SimHitsEB = iEvent.getHandle(tok_ebf_);
// Finds out automatically, if this is fullsim or fastsim
bool isFastSim = SimHitsEB.isValid();
if (!isFastSim)
SimHitsEB = iEvent.getHandle(tok_ebs_);
const edm::Handle<edm::PCaloHitContainer> SimHitsEE =
isFastSim ? iEvent.getHandle(tok_eef_) : iEvent.getHandle(tok_ees_);
const edm::Handle<edm::PCaloHitContainer> SimHitsES =
isFastSim ? iEvent.getHandle(tok_esf_) : iEvent.getHandle(tok_ess_);
// merge them into one single vector
auto SimHits = *(SimHitsEB.product());
SimHits.insert(SimHits.end(), SimHitsEE->begin(), SimHitsEE->end());
SimHits.insert(SimHits.end(), SimHitsES->begin(), SimHitsES->end());
// As we only had one generated particle (and hopefully no pileup),
// the total energy is due to the generated particle only
float energyTotal = 0;
for (auto const& Hit : SimHits) {
energyTotal += Hit.energy();
}
tree_e_ = genE;
tree_eta_ = genEta;
tree_response_ = energyTotal / genE;
tree_->Fill();
}
void TreeWriterForEcalCorrection::fillDescriptions(edm::ConfigurationDescriptions& descriptions) {
edm::ParameterSetDescription desc;
descriptions.add("ecalScaleFactorCalculator", desc);
}
DEFINE_FWK_MODULE(TreeWriterForEcalCorrection);
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