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PATTrigProducer.cc

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//
// $Id: PATTrigProducer.cc,v 1.2 2008/06/08 12:24:03 vadler Exp $
//


#include "PhysicsTools/PatAlgos/plugins/PATTrigProducer.h"

#include "DataFormats/HLTReco/interface/TriggerEvent.h"

#include "DataFormats/PatCandidates/interface/TriggerPrimitive.h"


using namespace pat;
using namespace trigger;
using namespace edm;
using namespace std;


PATTrigProducer::PATTrigProducer( const ParameterSet & iConfig ) :
  // initialize
  triggerEvent_ (iConfig.getParameter<InputTag>( "triggerEvent" ) ),
  filterName_   (iConfig.getParameter<InputTag>( "filterName" ) )
{
  produces<TriggerPrimitiveCollection>();
}


PATTrigProducer::~PATTrigProducer()
{
}


void PATTrigProducer::produce( Event& iEvent, const EventSetup& iSetup )
{
  auto_ptr<TriggerPrimitiveCollection> patTrigCandidates( new TriggerPrimitiveCollection );
  Handle<TriggerEvent> triggerEvent;
  try { // In this case, we want to act differently compared to the usual behaviour on "ProductNotFound" exception thrown by Event::getByLabel.
    iEvent.getByLabel( triggerEvent_, triggerEvent );
    size_type nFilters = triggerEvent->sizeFilters();
    if ( nFilters == 0 ) {
      LogDebug( "noTriggerFilters" ) << "PATTrigProducer: The TriggerEvent of this event contains no filter information at all!";
    } else {
      size_type iFilter = triggerEvent->filterIndex( filterName_ );
      if ( iFilter == nFilters ) {
        LogDebug( "noTriggerFilter" ) << "PATTrigProducer: The TriggerEvent of this event contains no filter information on filter " << filterName_.label() << "!";
      } else {
        const Vids &                    triggerIds     = triggerEvent->filterIds( iFilter );
        const Keys &                    triggerKeys    = triggerEvent->filterKeys( iFilter );
        const TriggerObjectCollection & triggerObjects = triggerEvent->getObjects();
        assert( triggerIds.size() == triggerKeys.size() );
        for ( size_type idx = 0; idx < triggerKeys.size(); ++idx ) {
          const TriggerObject triggerObject = triggerObjects.at( triggerKeys.at( idx ) );
          auto_ptr<TriggerPrimitive> ptr( new TriggerPrimitive( triggerObject.particle().p4(), filterName_.label(), triggerIds.at( idx ), triggerObject.id() ) );
          patTrigCandidates->push_back( ptr );
        }
      } 
    }
  } catch( Exception exc ) {
    if ( exc.categoryCode() == errors::ProductNotFound ) {
      LogWarning( "noTriggerEvent" ) << "PATTrigProducer: No TriggerEvent " << triggerEvent_.label() << " found!";
    } else {
      throw exc;
    }
  }
  iEvent.put( patTrigCandidates );
}


#include "FWCore/Framework/interface/MakerMacros.h"
DEFINE_FWK_MODULE(PATTrigProducer);

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