#include <WeightManager.h>

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

	WeightManager (const edm::ParameterSet &)

	~WeightManager ()

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

edm::InputTag	_hepmcCollection

bool	_useHepMC

Detailed Description

Definition at line 17 of file WeightManager.h.

Constructor & Destructor Documentation

WeightManager::WeightManager ( const edm::ParameterSet & iConfig )

Definition at line 12 of file WeightManager.cc.

References _genEventInfos, _hepmcCollection, _useHepMC, and edm::ParameterSet::getParameter().

                                                        :
 _useHepMC(iConfig.getParameter<bool>("UseWeightFromHepMC"))
 {
   if (_useHepMC)
     _hepmcCollection = iConfig.getParameter<InputTag>("hepmcCollection");
   else  
     _genEventInfos = iConfig.getParameter<std::vector<InputTag> >("genEventInfos");
 }

WeightManager::~WeightManager ( )

inline

Definition at line 22 of file WeightManager.h.

22 {};

Member Function Documentation

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

Definition at line 21 of file WeightManager.cc.

References _genEventInfos, _hepmcCollection, _useHepMC, edm::Event::getByLabel(), i, and info.

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

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