CMSSW Reference Manual

GenEventWeightProducer::GenEventWeightProducer ( const edm::ParameterSet & p )

constructor

Definition at line 35 of file GenEventWeightProducer.cc.

00035                                                                        :
00036   src_( p.getParameter<InputTag>( "src" ) ) {
00037   produces<double>();
00038 }

void GenEventWeightProducer::produce	(	edm::Event &	evt,
		const edm::EventSetup &	es
	)			`[private, virtual]`

Implements edm::EDProducer.

Definition at line 41 of file GenEventWeightProducer.cc.

References lat::endl(), TtGenEvtProducer_cfi::genEvt, edm::Event::getByLabel(), edm::errors::InvalidReference, edm::Event::put(), src_, and weight.

00041                                                                        {
00042   Handle<HepMCProduct> mc;
00043   evt.getByLabel( src_, mc );
00044   const GenEvent * genEvt = mc->GetEvent();
00045   if( genEvt == 0 ) 
00046     throw edm::Exception( edm::errors::InvalidReference ) 
00047       << "HepMC has null pointer to GenEvent" << endl;
00048   auto_ptr<double> weight( new double(1) );
00049   HepMC::WeightContainer wc = genEvt->weights();
00050   if ( wc.size() > 0 )  (*weight) = wc[ 0 ];
00051   evt.put( weight );
00052 }

edm::InputTag GenEventWeightProducer::src_ [private]

Definition at line 23 of file GenEventWeightProducer.cc.

Referenced by produce().


Public Member Functions
	GenEventWeightProducer (const edm::ParameterSet &)
	constructor
Private Member Functions
void	produce (edm::Event &evt, const edm::EventSetup &es)
Private Attributes
edm::InputTag	src_

GenEventWeightProducer Class Reference

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation