art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT > Class Template Reference

#include <IPRHelper.h>

Public Types
using	shared_exception_t = std::shared_ptr< art::Exception const >

Public Member Functions
	IPRHelper (EVENT const &e, InputTag const &tag)
template<typename Acoll , typename Bcoll >
shared_exception_t	operator() (Acoll const &aColl, Bcoll &bColl) const
template<typename Acoll , typename Bcoll >
shared_exception_t	operator() (Acoll const &aColl, Bcoll &bColl, dataColl_t &dColl) const
template<typename Acoll , typename Bcoll >
auto	operator() (Acoll const &aColl, Bcoll &bColl) const -> shared_exception_t
template<typename Acoll , typename Bcoll >
auto	operator() (Acoll const &aColl, Bcoll &bColl, dataColl_t &dColl) const -> shared_exception_t

Private Types
using	dataColl_t = std::conditional_t< std::is_void_v< Data >, IPRHelperDef, DATACOLL >

Private Attributes
EVENT const &	event_
InputTag const	assnsTag_

Detailed Description

template<typename ProdA, typename ProdB, typename Data, typename DATACOLL, typename EVENT>
class art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >

Definition at line 50 of file IPRHelper.h.

Member Typedef Documentation

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

using art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::dataColl_t = std::conditional_t<std::is_void_v<Data>, IPRHelperDef, DATACOLL>

private

Definition at line 128 of file IPRHelper.h.

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

using art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::shared_exception_t = std::shared_ptr<art::Exception const>

Definition at line 131 of file IPRHelper.h.

Constructor & Destructor Documentation

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::IPRHelper ( EVENT const &  e, InputTag const &  tag  )

inline

Definition at line 133 of file IPRHelper.h.

: event_{e}, assnsTag_{tag} {}

Member Function Documentation

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

template<typename Acoll , typename Bcoll >

shared_exception_t art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::operator()	(	Acoll const &	aColl,
		Bcoll &	bColl
	)		const

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

template<typename Acoll , typename Bcoll >

shared_exception_t art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::operator()	(	Acoll const &	aColl,
		Bcoll &	bColl,
		dataColl_t &	dColl
	)		const

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

template<typename Acoll , typename Bcoll >

auto art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::operator() ( Acoll const &  aColl, Bcoll &  bColl  ) const -> shared_exception_t

inline

Definition at line 164 of file IPRHelper.h.

{
  IPRHelperDef dummy;
  return (*this)(aColl, bColl, dummy);
}

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

template<typename Acoll , typename Bcoll >

auto art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::operator()	(	Acoll const &	aColl,
		Bcoll &	bColl,
		dataColl_t &	dColl
	)		const -> shared_exception_t

Definition at line 206 of file IPRHelper.h.

{
  detail::BcollHelper<ProdB> bh(assnsTag_);
  detail::DataCollHelper<Data> dh;
  typename EVENT::template HandleT<Assns<ProdA, ProdB, Data>> assnsHandle;
  event_.getByLabel(assnsTag_, assnsHandle);
  if (!assnsHandle.isValid()) {
    return assnsHandle.whyFailed(); // Failed to get Assns product.
  }
  bh.init(aColl.size(), bColl);
  dh.init(aColl.size(), dColl);
  // Answer cache.
  std::unordered_multimap<typename Ptr<ProdA>::const_pointer,
                          std::pair<Ptr<ProdB>, ptrdiff_t>>
    lookupCache;
  ptrdiff_t counter{0};
  for (auto const& apair : *assnsHandle) {
    if (apair.first.isAvailable()) {
      lookupCache.emplace(
        apair.first.get(),
        typename decltype(lookupCache)::mapped_type(apair.second, counter));
    }
    ++counter;
  }
  // Now use the cache.
  size_t bIndex{0};
  for (typename Acoll::const_iterator i = aColl.begin(), e = aColl.end();
       i != e;
       ++i, ++bIndex) {
    auto foundItems = lookupCache.equal_range(
      ensurePointer<typename Ptr<ProdA>::const_pointer>(i));
    if (foundItems.first != lookupCache.cend()) {
      std::for_each(
        foundItems.first,
        foundItems.second,
        [&bh, &dh, &bColl, bIndex, &assnsHandle, &dColl](auto const& itemPair) {
          bh.fill(bIndex, itemPair.second.first, bColl);
          dh.fill(itemPair.second.second, *assnsHandle, bIndex, dColl);
        });
    }
  }
  return shared_exception_t();
}

Member Data Documentation

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

InputTag const art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::assnsTag_

private

Definition at line 153 of file IPRHelper.h.

template<typename ProdA , typename ProdB , typename Data , typename DATACOLL , typename EVENT >

EVENT const& art::detail::IPRHelper< ProdA, ProdB, Data, DATACOLL, EVENT >::event_

private

Definition at line 152 of file IPRHelper.h.

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The documentation for this class was generated from the following file:

• canvas/canvas/Persistency/Common/detail/IPRHelper.h