SingleObjectSelector.h

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#ifndef UtilAlgos_SingleObjectSelector_h
#define UtilAlgos_SingleObjectSelector_h
/* \class SingleObjectSelector
 *
 * \author Luca Lista, INFN
 */
#include "CommonTools/UtilAlgos/interface/ObjectSelector.h"
#include "CommonTools/UtilAlgos/interface/StoreContainerTrait.h"
#include "CommonTools/UtilAlgos/interface/SelectionAdderTrait.h"
#include "CommonTools/UtilAlgos/interface/SingleElementCollectionSelector.h"



/* the following is just to ease transition
 *    grep -r SingleObjectSelector * | wc 
 *      209     540   22532
 */


template<typename InputCollection, typename Selector, 
     typename EdmFilter,
     typename OutputCollection = typename ::helper::SelectedOutputCollectionTrait<InputCollection>::type,
     typename StoreContainer = typename ::helper::StoreContainerTrait<OutputCollection>::type,
     typename PostProcessor = ::helper::NullPostProcessor<OutputCollection, EdmFilter>,
     typename StoreManager = typename ::helper::StoreManagerTrait<OutputCollection, EdmFilter>::type,
     typename Base = typename ::helper::StoreManagerTrait<OutputCollection, EdmFilter>::base,
     typename RefAdder = typename ::helper::SelectionAdderTrait<InputCollection, StoreContainer>::type>
class SingleObjectSelectorBase : 
  public ObjectSelector<SingleElementCollectionSelector<InputCollection, Selector, OutputCollection, StoreContainer, RefAdder>, 
            OutputCollection, NonNullNumberSelector, PostProcessor, StoreManager, Base> {
public:
  // SingleObjectSelectorBase() = default;
  explicit SingleObjectSelectorBase( const edm::ParameterSet & cfg ) :
    ObjectSelector<SingleElementCollectionSelector<InputCollection, Selector, OutputCollection, StoreContainer, RefAdder>, 
           OutputCollection, NonNullNumberSelector, PostProcessor, StoreManager, Base>( cfg ) { }
  ~SingleObjectSelectorBase() override { }
};



template<typename InputCollection, typename Selector,
     typename OutputCollection = typename ::helper::SelectedOutputCollectionTrait<InputCollection>::type,
     typename StoreContainer = typename ::helper::StoreContainerTrait<OutputCollection>::type,
     typename PostProcessor = ::helper::NullPostProcessor<OutputCollection, edm::EDFilter> >
using SingleObjectSelectorLegacy = SingleObjectSelectorBase<InputCollection,Selector, edm::EDFilter, 
                                OutputCollection,StoreContainer,PostProcessor
                                >;



#include "FWCore/Framework/interface/stream/EDFilter.h"

template<typename InputCollection, typename Selector,
     typename OutputCollection = typename ::helper::SelectedOutputCollectionTrait<InputCollection>::type,
     typename StoreContainer = typename ::helper::StoreContainerTrait<OutputCollection>::type,
     typename PostProcessor = ::helper::NullPostProcessor<OutputCollection, edm::stream::EDFilter<> > >
using SingleObjectSelectorStream = SingleObjectSelectorBase<InputCollection,Selector, edm::stream::EDFilter<>,
                                OutputCollection,StoreContainer,PostProcessor
                                >;


template<typename InputCollection, typename Selector,
     typename OutputCollection = typename ::helper::SelectedOutputCollectionTrait<InputCollection>::type,
     typename StoreContainer = typename ::helper::StoreContainerTrait<OutputCollection>::type,
     typename PostProcessor = ::helper::NullPostProcessor<OutputCollection, edm::stream::EDFilter<> > >
using SingleObjectSelector = SingleObjectSelectorStream<InputCollection,Selector,
                            OutputCollection,StoreContainer,PostProcessor>;



#endif