Creates an one-to-(zero-or-one) wrapper for the specified types. More...

#include <OneTo01DataProxyMaker.h>

Inheritance diagram for proxy::OneTo01DataProxyMaker< Main, Aux, Metadata, CollProxy, Tag >:

Public Types
using	main_element_t = Main
	Type of the main datum ("left"). More...

using	aux_element_t = Aux
	Type of the auxiliary associated datum ("right"). More...

using	metadata_t = Metadata
	Type of associated metadata. More...

using	aux_collection_proxy_t = details::OneTo01Data< main_element_t, aux_element_t, metadata_t, data_tag >
	Type of associated data proxy being created. More...

using	assns_t = typename aux_collection_proxy_t::assns_t
	Type of art association being used as input. More...

Public Types inherited from proxy::OneTo01DataProxyMakerBase< Main, Aux, Metadata, Tag >
using	data_tag = Tag
	Tag labelling the associated data we are going to produce. More...

using	main_element_t = Main
	Type of the main datum ("left"). More...

using	aux_element_t = Aux
	Type of the auxiliary associated datum ("right"). More...

using	metadata_t = Metadata
	Type of associated metadata. More...

using	aux_collection_proxy_t = details::OneTo01Data< main_element_t, aux_element_t, metadata_t, data_tag >
	Type of associated data proxy being created. More...

using	assns_t = typename aux_collection_proxy_t::assns_t
	Type of art association being used as input. More...

Static Public Member Functions
template<typename Event , typename Handle , typename MainArgs , typename... Args>
static auto	make (Event const &event, Handle &&mainHandle, MainArgs const &margs, Args &&...args)
	Create a association proxy collection using main collection tag. More...

Static Public Member Functions inherited from proxy::OneTo01DataProxyMakerBase< Main, Aux, Metadata, Tag >
static auto	make (Event const &event, Handle &&mainHandle, MainArgs const &mainArgs)
	Create a association proxy collection using main collection tag. More...

static auto	make (Event const &event, Handle &&mainHandle, MainArgs const &, art::InputTag const &auxInputTag)
	Create a association proxy collection using the specified tag. More...

static auto	make (Event const &, Handle &&handle, MainArgs const &, Assns const &assns)
	Create a association proxy collection using the specified tag. More...

Private Types
using	base_t = OneTo01DataProxyMakerBase< Main, Aux, Metadata, Tag >

Detailed Description

template<typename Main, typename Aux, typename Metadata, typename CollProxy, typename Tag = Aux>
class proxy::OneTo01DataProxyMaker< Main, Aux, Metadata, CollProxy, Tag >

Creates an one-to-(zero-or-one) wrapper for the specified types.

Template Parameters

Main	type of main datum (element) to associate from ("left")
Aux	type of datum (element) to associate to ("right")
Metadata	type of metadata in the association
CollProxy	type of proxy this associated data works for
Tag	tag for the association proxy to be created

See also

withZeroOrOne() This class is (indirectly) called when using proxy::withZeroOrOne() in getCollection(). Its task is to supervise the creation of the proxy to the data association between the main data type and an auxiliary one. The interface required by withZeroOrOne() includes:

a static make() method creating and returning the associated data proxy with arguments an event, the main data product handle, a template argument representing the main collection information, and all the arguments required for the creation of the associated proxy (coming from withZeroOrOne()); equivalent to the signature:
template <typename Event, typename Handle, typename MainArg, typename... Args>
auto make(Event const&, Handle&&, MainArg const&, Args&&...);

This class can be specialized (see withAssociated() for an example of the general procedure). The default implementation just wraps a one-to-(zero-or-one) art::Assns<Main, Aux> data product fulfilling one-to-(zero or one) sequential association requirement.

The last template argument is designed for specialization of associations in the context of a specific proxy type.

Definition at line 201 of file OneTo01DataProxyMaker.h.