ObjectCountEventSelector.h

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#ifndef CommonTools_UtilAlgos_ObjectCountEventSelector_h
#define CommonTools_UtilAlgos_ObjectCountEventSelector_h

#include "FWCore/Framework/interface/Event.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Utilities/interface/InputTag.h"
#include "CommonTools/UtilAlgos/interface/ParameterAdapter.h"
#include "CommonTools/UtilAlgos/interface/CollectionFilterTrait.h"
#include "CommonTools/UtilAlgos/interface/EventSelectorBase.h"

template<typename C, 
     typename S = AnySelector,
     typename N = MinNumberSelector,
         typename CS = typename helper::CollectionFilterTrait<C, S, N>::type>
class ObjectCountEventSelector : public EventSelectorBase
{
 public:
  explicit ObjectCountEventSelector( const edm::ParameterSet & cfg ) :
    src_( cfg.template getParameter<edm::InputTag>( "src" ) ),
    select_( reco::modules::make<S>( cfg ) ),
    sizeSelect_( reco::modules::make<N>( cfg ) ) {
  }
 
  bool operator()(edm::Event& evt, const edm::EventSetup&) {
    edm::Handle<C> source;
    evt.getByLabel( src_, source );
    return CS::filter( * source, select_, sizeSelect_ );
  }
 
 private:
  edm::InputTag src_;
 
  S select_;
 
  N sizeSelect_;
};

#endif