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pfpat Namespace Reference

Functions
template<class T>
void	fetchCollection (T &c, const edm::InputTag &tag, const edm::Event &iEvent)

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Function Documentation

template<class T>

void pfpat::fetchCollection	(	T &	c,
		const edm::InputTag &	tag,
		const edm::Event &	iEvent
	)			[inline]

Definition at line 10 of file FetchCollection.h.

References empty, lat::endl(), err, Exception, and edm::Event::getByLabel().

Referenced by PFTopProjector::produce(), PFIsolation::produce(), and PFPileUp::produce().

                                             {
  
  edm::InputTag empty;
  if( tag==empty ) return;
  
  bool found = iEvent.getByLabel(tag, c);
  
  if(!found ) {
    std::ostringstream  err;
    err<<" cannot get collection: "
       <<tag<<std::endl;
    edm::LogError("PFPAT")<<err.str();
    throw cms::Exception( "MissingProduct", err.str());
  }
  
}

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