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// -*- C++ -*-
//
// Package: MCMultiSignatureFilter
// Class: MCMultiSignatureFilter
//
/*
Description: select events satistify any or all of signatures
Implementation: derived from MCMultiParticleFilter
*/
#include "DataFormats/Common/interface/Handle.h"
#include "FWCore/Framework/interface/global/EDFilter.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/Frameworkfwd.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/EDGetToken.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "SimDataFormats/GeneratorProducts/interface/HepMCProduct.h"
#include <cmath>
#include <cstdlib>
#include <vector>
//
// class declaration
//
class MCMultiSignatureFilter : public edm::global::EDFilter<> {
public:
explicit MCMultiSignatureFilter(const edm::ParameterSet&);
private:
bool filter(edm::StreamID, edm::Event&, const edm::EventSetup&) const override;
// ----------member data ---------------------------
const edm::EDGetTokenT<edm::HepMCProduct> token_;
const bool selectAny_; // if true select events that satistify any signature, otherwise all
const std::vector<int> particleID_; // particle IDs to look for
std::vector<double> ptMin_; // minimum Pt of particles
std::vector<double> etaMax_; // maximum fabs(eta) of particles
std::vector<int> status_; // status of particles
std::vector<int> minN_; // minimum number of particles
};
MCMultiSignatureFilter::MCMultiSignatureFilter(const edm::ParameterSet& iConfig)
: token_(consumes<edm::HepMCProduct>(
iConfig.getUntrackedParameter<edm::InputTag>("src", edm::InputTag("generator", "unsmeared")))),
selectAny_(iConfig.getParameter<bool>("SelectAny")),
particleID_(iConfig.getParameter<std::vector<int> >("ParticleID")),
ptMin_(iConfig.getParameter<std::vector<double> >("PtMin")),
etaMax_(iConfig.getParameter<std::vector<double> >("EtaMax")),
status_(iConfig.getParameter<std::vector<int> >("Status")),
minN_(iConfig.getParameter<std::vector<int> >("MinN")) {
if (particleID_.size() != ptMin_.size() || particleID_.size() != etaMax_.size() ||
particleID_.size() != status_.size() || particleID_.size() != minN_.size())
throw cms::Exception("BadConfig") << "MCMultiSignatureFilter: parameter vectors must have the same length";
}
// ------------ method called to skim the data ------------
bool MCMultiSignatureFilter::filter(edm::StreamID, edm::Event& iEvent, const edm::EventSetup&) const {
edm::Handle<edm::HepMCProduct> evt;
iEvent.getByToken(token_, evt);
unsigned int nSignatures(particleID_.size());
std::vector<int> searchResults(nSignatures, 0);
const HepMC::GenEvent* genEvent = evt->GetEvent();
for (HepMC::GenEvent::particle_const_iterator p = genEvent->particles_begin(); p != genEvent->particles_end(); ++p) {
auto genParticle = *p;
for (unsigned int i = 0; i < nSignatures; ++i) {
if (abs(genParticle->pdg_id()) != abs(particleID_[i]) or genParticle->momentum().perp() < ptMin_[i] or
fabs(genParticle->momentum().eta()) > etaMax_[i] or genParticle->status() != status_[i])
continue;
searchResults[i] += 1;
}
}
bool passedAll(true);
bool passedAny(false);
for (unsigned int i = 0; i < nSignatures; ++i) {
bool passed = searchResults[i] >= minN_[i];
passedAll = passedAll and passed;
passedAny = passedAny or passed;
}
if (selectAny_)
return passedAny;
else
return passedAll;
}
//define this as a plug-in
DEFINE_FWK_MODULE(MCMultiSignatureFilter);
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