proxy::CollectionProxyMaker< CollProxy > Struct Template Reference

Class to assemble the required proxy. More...

#include "CollectionProxyMaker.h"

Inheritance diagram for proxy::CollectionProxyMaker< CollProxy >:

Public Types
using	traits_t = CollectionProxyMakerTraits< CollProxy >
	Traits of the collection proxy for the collection proxy maker. More...
using	main_collection_proxy_t = typename traits_t::main_collection_proxy_t
	Type of main collection proxy. More...
using	main_element_t = typename traits_t::main_element_t
	Type returned by the main collection indexing operator. More...
using	main_collection_t = typename traits_t::main_collection_t
	Type of element of the main collection. More...

Static Public Member Functions
template<typename Event , typename... WithArgs>
static auto	make (Event const &event, art::InputTag const &tag, WithArgs &&...withArgs)
	Creates and returns a collection proxy based on CollProxy and with the requested associated data. More...

Detailed Description

template<typename CollProxy>
struct proxy::CollectionProxyMaker< CollProxy >

Class to assemble the required proxy.

Template Parameters

CollProxy

a type characterizing the produced proxy

This class is used by getCollection() to create the requested proxy. The required interface for this class is:

• make(): a static method returning the collection proxy, matching the signature

  template <typename Event, typename... Args>
  auto make(Event const&, Args&&...);

  where the first argument will be the event to read the information from.

A default implementation is provided as proxy::CollectionProxyMakerBase. Specializations of proxy::CollectionProxyMaker may choose to derive from proxy::CollectionProxyMakerBase as well, for convenience.

Definition at line 139 of file CollectionProxyMaker.h.

Member Typedef Documentation

template<typename CollProxy>

using proxy::CollectionProxyMakerBase< CollProxy >::main_collection_proxy_t = typename traits_t::main_collection_proxy_t

inherited

Type of main collection proxy.

Definition at line 87 of file CollectionProxyMaker.h.

template<typename CollProxy>

using proxy::CollectionProxyMakerBase< CollProxy >::main_collection_t = typename traits_t::main_collection_t

inherited

Type of element of the main collection.

Definition at line 93 of file CollectionProxyMaker.h.

template<typename CollProxy>

using proxy::CollectionProxyMakerBase< CollProxy >::main_element_t = typename traits_t::main_element_t

inherited

Type returned by the main collection indexing operator.

Definition at line 90 of file CollectionProxyMaker.h.

template<typename CollProxy>

using proxy::CollectionProxyMakerBase< CollProxy >::traits_t = CollectionProxyMakerTraits<CollProxy>

inherited

Traits of the collection proxy for the collection proxy maker.

Definition at line 84 of file CollectionProxyMaker.h.

Member Function Documentation

template<typename CollProxy >

template<typename Event , typename... WithArgs>

auto proxy::CollectionProxyMakerBase< CollProxy >::make ( Event const &  event, art::InputTag const &  tag, WithArgs &&...  withArgs  )

staticinherited

Creates and returns a collection proxy based on CollProxy and with the requested associated data.

Template Parameters

Event	type of the event to read the information from
WithArgs	type of arguments for associated data

Parameters

event	event to read the information from
tag	input tag of the main data product
withArgs	optional associated objects to be included

Returns

a collection proxy from data as retrieved via tag

For each argument in withArgs, an action is taken. Usually that is to add an association to the proxy.

Only a few associated data collections are supported:

• withAssociated<Aux>() (optional argument: hit-track association tag, as track by default): adds to the proxy an association to the Aux data product (see withAssociated())

Definition at line 262 of file CollectionProxyMaker.h.

Referenced by proxy::getCollection().

  {
    auto mainHandle = event.template getValidHandle<main_collection_t>(tag);

    // The actual type of collection proxy implementation is extracted from
    // the traits of the proxy (`collection_proxy_impl_t`), but if that is not
    // provided a default implementation, `proxy::CollectionProxy`, is used:
    return details::createCollectionProxyFromTraits<traits_t>(
      *mainHandle,
      withArgs.template createAuxProxyMaker<main_collection_proxy_t>(event, mainHandle, tag)...);
  } // CollectionProxyMakerBase<>::make<>()

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

• lardata/v09_16_03/source/lardata/RecoBaseProxy/ProxyBase/CollectionProxyMaker.h