ProxyAsAuxProxyMaker.h

Go to the documentation of this file.

#ifndef LARDATA_RECOBASEPROXY_PROXYBASE_PROXYASAUXPROXYMAKER_H
#define LARDATA_RECOBASEPROXY_PROXYBASE_PROXYASAUXPROXYMAKER_H

// LArSoft libraries
#include "lardata/RecoBaseProxy/ProxyBase/ProxyAsParallelData.h"
#include "lardata/RecoBaseProxy/ProxyBase/getCollection.h"
#include "larcorealg/CoreUtils/ContainerMeta.h" // util::collection_value_t, ...

// framework libraries
#include "canvas/Utilities/InputTag.h"

// C/C++ standard 
#include <utility> // std::forward(), std::move()


namespace proxy {
  
  
  template <
    typename Main,
    typename AuxProxy,
    typename AuxTag = AuxProxy
    >
  struct ProxyAsAuxProxyMakerBase {
    
    using data_tag = AuxTag;
    
    using main_element_t = Main;
    
    using aux_proxy_t = AuxProxy;
    
    template
      <typename Event, typename Handle, typename MainArgs, typename... AuxArgs>
    static auto make(
      Event const& event, Handle&&, MainArgs const&,
      art::InputTag const& auxProxyTag, AuxArgs&&... args
      )
      {
        auto auxProxy = makeAuxiliaryProxy
          (event, auxProxyTag, std::forward<AuxArgs>(args)...);
        return makeProxyAsParallelData
          <data_tag, util::collection_value_t<decltype(auxProxy)>>
          (std::move(auxProxy));
      }
    
    
      private:
    
    template <typename Event, typename... AuxArgs>
    static auto makeAuxiliaryProxy(
      Event const& event,
      art::InputTag const& auxProxyTag,
      AuxArgs&&... args
    )
      { 
        return getCollection<aux_proxy_t>
          (event, auxProxyTag, std::forward<AuxArgs>(args)...);
      }
    
    
  }; // struct ProxyAsAuxProxyMakerBase<>
  
  
  //--------------------------------------------------------------------------
  template <
    typename Main,
    typename AuxProxy,
    typename CollProxy,
    typename Tag = util::collection_value_t<AuxProxy>
    >
  class ProxyAsAuxProxyMaker
    : public ProxyAsAuxProxyMakerBase<Main, AuxProxy, Tag>
    {};
  
  
  
  
} // namespace proxy


#endif // LARDATA_RECOBASEPROXY_PROXYBASE_PROXYASAUXPROXYMAKER_H