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#ifndef RecoAlgos_SingleElementCollectionSelector_h
#define RecoAlgos_SingleElementCollectionSelector_h
/** \class SingleElementCollectionSelector
*
* selects a subset of a collection based
* on single element selection done via functor
*
* \author Luca Lista, INFN
*
* \version $Revision: 1.1 $
*
* $Id: SingleElementCollectionSelector.h,v 1.1 2009/03/03 13:07:28 llista Exp $
*
*/
#include "FWCore/Framework/interface/ConsumesCollector.h"
#include "FWCore/ParameterSet/interface/ConfigurationDescriptions.h"
#include "CommonTools/UtilAlgos/interface/SelectionAdderTrait.h"
#include "CommonTools/UtilAlgos/interface/StoreContainerTrait.h"
#include "CommonTools/UtilAlgos/interface/ParameterAdapter.h"
#include "CommonTools/UtilAlgos/interface/SelectedOutputCollectionTrait.h"
namespace reco {
namespace modules {
template <typename S>
struct SingleElementCollectionSelectorEventSetupInit;
}
} // namespace reco
namespace edm {
class Event;
class EventSetup;
} // namespace edm
template <typename InputCollection,
typename Selector,
typename OutputCollection = typename ::helper::SelectedOutputCollectionTrait<InputCollection>::type,
typename StoreContainer = typename ::helper::StoreContainerTrait<OutputCollection>::type,
typename RefAdder = typename ::helper::SelectionAdderTrait<InputCollection, StoreContainer>::type>
struct SingleElementCollectionSelector {
typedef InputCollection collection;
typedef StoreContainer container;
typedef Selector selector;
typedef typename container::const_iterator const_iterator;
SingleElementCollectionSelector(const edm::ParameterSet& cfg, edm::ConsumesCollector&& iC)
: select_(reco::modules::make<Selector>(cfg, iC)) {}
const_iterator begin() const { return selected_.begin(); }
const_iterator end() const { return selected_.end(); }
void select(const edm::Handle<InputCollection>& c, const edm::Event&, const edm::EventSetup&) {
selected_.clear();
for (size_t idx = 0; idx < c->size(); ++idx) {
if (select_((*c)[idx]))
addRef_(selected_, c, idx);
}
}
static void fillPSetDescription(edm::ParameterSetDescription& desc) {
reco::modules::ParameterAdapter<Selector>::fillPSetDescription(desc);
};
private:
container selected_;
selector select_;
RefAdder addRef_;
friend struct reco::modules::SingleElementCollectionSelectorEventSetupInit<SingleElementCollectionSelector>;
};
#include "CommonTools/UtilAlgos/interface/EventSetupInitTrait.h"
namespace reco {
namespace modules {
template <typename S>
struct SingleElementCollectionSelectorEventSetupInit {
explicit SingleElementCollectionSelectorEventSetupInit(edm::ConsumesCollector iC) : esi_(iC) {}
typedef typename EventSetupInit<typename S::selector>::type ESI;
void init(S& s, const edm::Event& ev, const edm::EventSetup& es) { esi_.init(s.select_, ev, es); }
ESI esi_;
};
template <typename I, typename S, typename O, typename C, typename R>
struct EventSetupInit<SingleElementCollectionSelector<I, S, O, C, R> > {
typedef SingleElementCollectionSelectorEventSetupInit<SingleElementCollectionSelector<I, S, O, C, R> > type;
};
} // namespace modules
} // namespace reco
#endif
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