#include <WeightManager.h>

Public Member Functions
double	weight (const edm::Event &)

	WeightManager (const edm::ParameterSet &, edm::ConsumesCollector iC)

	~WeightManager ()

Private Attributes
std::vector< edm::InputTag >	_genEventInfos

edm::InputTag	_hepmcCollection

bool	_useHepMC

std::vector< edm::EDGetTokenT< std::vector< edm::InputTag > > >	genEventInfosTokens_

edm::EDGetTokenT< edm::HepMCProduct >	hepmcCollectionToken_

Detailed Description

Definition at line 20 of file WeightManager.h.

Constructor & Destructor Documentation

WeightManager::WeightManager	(	const edm::ParameterSet &	iConfig,
		edm::ConsumesCollector	iC
	)

Definition at line 12 of file WeightManager.cc.

References _genEventInfos, _hepmcCollection, _useHepMC, edm::ConsumesCollector::consumes(), genEventInfosTokens_, edm::ParameterSet::getParameter(), hepmcCollectionToken_, and mps_fire::i.

                                                                                :
 _useHepMC(iConfig.getParameter<bool>("UseWeightFromHepMC"))
 {
   if (_useHepMC){
     _hepmcCollection = iConfig.getParameter<InputTag>("hepmcCollection");
     hepmcCollectionToken_=iC.consumes<HepMCProduct>(_hepmcCollection);
   }
   else{
     _genEventInfos = iConfig.getParameter<std::vector<InputTag> >("genEventInfos");
     for(unsigned int i=0; i<_genEventInfos.size();i++) genEventInfosTokens_.push_back(iC.consumes<std::vector<InputTag> >(_genEventInfos[i]));
   }
 }

WeightManager::~WeightManager ( )

inline

Definition at line 25 of file WeightManager.h.

References mps_merge::weight.

25 {};

Member Function Documentation

double WeightManager::weight ( const edm::Event & iEvent )

Definition at line 25 of file WeightManager.cc.

References _useHepMC, genEventInfosTokens_, edm::Event::getByToken(), edm::HepMCProduct::GetEvent(), hepmcCollectionToken_, mps_fire::i, info(), and GenEventInfoProduct::weight().

Referenced by WValidation::analyze(), BasicHepMCHeavyIonValidation::analyze(), DrellYanValidation::analyze(), BasicGenParticleValidation::analyze(), BasicHepMCValidation::analyze(), MBUEandQCDValidation::analyze(), HiggsValidation::analyze(), and DuplicationChecker::analyze().

                                                {
   if (_useHepMC){
     edm::Handle<HepMCProduct> evt;
     iEvent.getByToken(hepmcCollectionToken_, evt);
     const HepMC::GenEvent *myGenEvent = evt->GetEvent();
 
     double weight = 1.;
     if (!myGenEvent->weights().empty())
       weight = myGenEvent->weights()[0];
     return weight;
   } else {
     double weight = 1.;
     for (unsigned int i = 0; i < genEventInfosTokens_.size(); ++i){
       edm::Handle<GenEventInfoProduct> info;
       iEvent.getByToken(genEventInfosTokens_[i], info);
       weight *= info->weight();
     }
     return weight;
   }
 }