CP::detail Namespace Reference

Classes
struct	ContainerType
	check what kind of object/container the argument is More...
struct	ShallowCopy
	a helper class to create shallow copies and register them in the event store More...
struct	ShallowCopy< T, 1 >
struct	ShallowCopy< T, 2 >
struct	ShallowCopy< T, 3 >
struct	ShallowCopy< xAOD::EgammaContainer >
struct	ShallowCopy< xAOD::IParticleContainer >

Functions
template<typename ContainerType, unsigned mode, typename AlgorithmType> requires (mode <= 2 && !std::is_const_v<ContainerType>)
StatusCode	addDependency (AlgorithmType &owner, const std::string &name, const std::string &decoName, bool decoWrite)

Function Documentation

addDependency()

template<typename ContainerType, unsigned mode, typename AlgorithmType>
requires (mode <= 2 && !std::is_const_v<ContainerType>)

StatusCode CP::detail::addDependency	(	AlgorithmType &	owner,
		const std::string &	name,
		const std::string &	decoName,
		bool	decoWrite )

Definition at line 38 of file AthenaDependencyHelpers.h.

    {
      // I'm creating a `****HandleKey` for the given name and then take
      // the proper dependency information from that, as that reuses as
      // much as possible from the official AthenaMT dependency
      // machinery.
      std::conditional_t<mode == 0,SG::ReadHandleKey<ContainerType>,
        std::conditional_t<mode == 1,SG::WriteHandleKey<ContainerType>,
          SG::UpdateHandleKey<ContainerType>>> key {name};
      if (!key.initialize().isSuccess())
        return StatusCode::FAILURE;
 
      if (decoName.empty())
      {
        owner.addDependency (key.fullKey(), key.mode());
        return StatusCode::SUCCESS;
      }
 
      // This `if` exempts the MissingETContainer, which doesn't seem to
      // like decoration handles. once this is fixed, this `if` should
      // be removed, as well as the link dependency to xAODMissingET in
      // the CMakeLists.txt of this package.
      if constexpr (std::same_as<ContainerType, xAOD::MissingETContainer>)
      {
        owner.msg() << MSG::WARNING << "Can not add decoration dependency " << name << "." << decoName << " as MissingET doesn't support decoration dependencies. This is only problematic if you are running in AthenaMT and rely on this dependency to exist." << endmsg;
        return StatusCode::SUCCESS;
      } else
      {
        if (decoWrite)
        {
          SG::WriteDecorHandleKey<ContainerType> decoKey {key, decoName};
          if (!decoKey.initialize().isSuccess())
            return StatusCode::FAILURE;
          owner.addDependency (decoKey.fullKey(), decoKey.mode());
        } else
        {
          SG::ReadDecorHandleKey<ContainerType> decoKey {key, decoName};
          if (!decoKey.initialize().isSuccess())
            return StatusCode::FAILURE;
          owner.addDependency (decoKey.fullKey(), decoKey.mode());
        }
        return StatusCode::SUCCESS;
      }
    }