SG::AuxElement Class Reference

Base class for elements of a container that can have aux data. More...

#include <AuxElement.h>

Inherits SG::ConstAuxElement.

Inherited by D3PDTest::Obj5, DMTest::AllocTest_v1, DMTest::C_v1, DMTest::CLinks_v1, DMTest::G_v1, DMTest::H_v1, DMTest::H_v2, TrigNavTest::TestB, xAOD::AFPData_v1, xAOD::AFPSiHit_v1, xAOD::AFPSiHit_v2, xAOD::AFPSiHitsCluster_v1, xAOD::AFPToFHit_v1, xAOD::AFPToFTrack_v1, xAOD::AFPTrack_v1, xAOD::AFPTrack_v2, xAOD::AFPVertex_v1, xAOD::ALFAData_v1, xAOD::BCMRawData_v1, xAOD::BTagging_v1, xAOD::BTagVertex_v1, xAOD::BunchConf_v1, xAOD::CaloRings_v1, xAOD::CMMCPHits_v1, xAOD::CMMEtSums_v1, xAOD::CMMJetHits_v1, xAOD::CMMRoI_v1, xAOD::CMXCPHits_v1, xAOD::CMXCPTob_v1, xAOD::CMXEtSums_v1, xAOD::CMXJetHits_v1, xAOD::CMXJetTob_v1, xAOD::CMXRoI_v1, xAOD::CPMHits_v1, xAOD::CPMRoI_v1, xAOD::CPMTobRoI_v1, xAOD::CPMTower_v1, xAOD::CPMTower_v2, xAOD::CutBookkeeper_v1, xAOD::eFexEMRoI_v1, xAOD::eFexTauRoI_v1, xAOD::eFexTower_v1, xAOD::EmTauRoI_v1, xAOD::EmTauRoI_v2, xAOD::EnergySumRoI_v1, xAOD::EnergySumRoI_v2, xAOD::EventInfo_v1, xAOD::EventShape_v1, xAOD::FileMetaData_v1, xAOD::ForwardEventInfo_v1, xAOD::gFexGlobalRoI_v1, xAOD::gFexJetRoI_v1, xAOD::gFexTower_v1, xAOD::HIEventShape_v1, xAOD::HIEventShape_v2, xAOD::IParticle, xAOD::JEMEtSums_v1, xAOD::JEMEtSums_v2, xAOD::JEMHits_v1, xAOD::JEMRoI_v1, xAOD::JEMTobRoI_v1, xAOD::JetElement_v1, xAOD::JetElement_v2, xAOD::JetEtRoI_v1, xAOD::JetRoI_v1, xAOD::JetRoI_v2, xAOD::jFexFwdElRoI_v1, xAOD::jFexLRJetRoI_v1, xAOD::jFexMETRoI_v1, xAOD::jFexSRJetRoI_v1, xAOD::jFexSumETRoI_v1, xAOD::jFexTauRoI_v1, xAOD::jFexTower_v1, xAOD::KLFitterResult, xAOD::L1TopoRawData_v1, xAOD::L1TopoSimResults_v1, xAOD::LumiBlockRange_v1, xAOD::MBTSModule_v1, xAOD::MissingET_v1, xAOD::MissingETAssociation_v1, xAOD::MissingETComponent_v1, xAOD::MuonRoI_v1, xAOD::MuonSegment_v1, xAOD::MuonSimHit_v1, xAOD::NRPCRDO_v1, xAOD::NSWMMTPRDO_v1, xAOD::NSWTPRDO_v1, xAOD::PartonHistory, xAOD::PseudoTopResult, xAOD::RingSet_v1, xAOD::RingSetConf_v1, xAOD::RODHeader_v1, xAOD::RODHeader_v2, xAOD::RoiDescriptorStore_v1, xAOD::SCTRawHitValidation_v1, xAOD::SlowMuon_v1, xAOD::SpacePoint_v1, xAOD::SystematicEvent, xAOD::TrackJacobian_v1, xAOD::TrackMeasurement_v1, xAOD::TrackMeasurementValidation_v1, xAOD::TrackParameters_v1, xAOD::TrackParticleClusterAssociation_v1, xAOD::TrackState_v1, xAOD::TrackStateValidation_v1, xAOD::TrackSummary_v1, xAOD::TrackSurface_v1, xAOD::TrigBphys_v1, xAOD::TrigCaloCluster_v1, xAOD::TrigComposite_v1, xAOD::TrigDecision_v1, xAOD::TriggerMenu_v1, xAOD::TriggerMenuJson_v1, xAOD::TriggerTower_v1, xAOD::TrigHisto2D_v1, xAOD::TrigMissingET_v1, xAOD::TrigNavigation_v1, xAOD::TrigPassBits_v1, xAOD::TrigRingerRings_v1, xAOD::TrigRingerRings_v2, xAOD::TrigRNNOutput_v1, xAOD::TrigRNNOutput_v2, xAOD::TrigSpacePointCounts_v1, xAOD::TrigT2MbtsBits_v1, xAOD::TrigT2ZdcSignals_v1, xAOD::TrigTrackCounts_v1, xAOD::TrigVertexCounts_v1, xAOD::TruthEventBase_v1, xAOD::TruthMetaData_v1, xAOD::TruthVertex_v1, xAOD::UncalibratedMeasurement_v1, xAOD::Vertex_v1, and xAOD::ZdcModule_v1.

Collaboration diagram for SG::AuxElement:

Public Types
using	TypelessConstAccessor = ConstAuxElement::TypelessConstAccessor
template<class T , class ALLOC = AuxAllocator_t<T>>
using	ConstAccessor = SG::ConstAccessor< T, ALLOC >
template<class T , class ALLOC = AuxAllocator_t<T>>
using	Accessor = SG::Accessor< T, ALLOC >
template<class T , class ALLOC = AuxAllocator_t<T>>
using	Decorator = SG::Decorator< T, ALLOC >

Public Member Functions
	AuxElement ()
	Default constructor. More...
	AuxElement (SG::AuxVectorData *container, size_t index)
	Constructor with explicit container / index. More...
	AuxElement (const AuxElement &other)
	Copy Constructor. More...
AuxElement &	operator= (const AuxElement &other)
	Assignment. More...
	~AuxElement ()
	Destructor. More...
const SG::AuxVectorData *	container () const
	Return the container holding this element. More...
SG::AuxVectorData *	container ()
	Return the container holding this element. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Accessor< T, ALLOC >::reference_type	auxdata (const std::string &name)
	Fetch an aux data variable, as a non-const reference. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Accessor< T, ALLOC >::reference_type	auxdata (const std::string &name, const std::string &clsname)
	Fetch an aux data variable, as a non-const reference. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Accessor< T, ALLOC >::const_reference_type	auxdata (const std::string &name) const
	Fetch an aux data variable, as a const reference. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Accessor< T, ALLOC >::const_reference_type	auxdata (const std::string &name, const std::string &clsname) const
	Fetch an aux data variable, as a const reference. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Accessor< T, ALLOC >::const_reference_type	auxdataConst (const std::string &name) const
	Fetch an aux data variable, as a const reference. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Accessor< T, ALLOC >::const_reference_type	auxdataConst (const std::string &name, const std::string &clsname) const
	Fetch an aux data variable, as a const reference. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
bool	isAvailable (const std::string &name, const std::string &clsname="") const
	Check if an aux variable is available for reading. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
bool	isAvailableWritable (const std::string &name, const std::string &clsname="")
	Check if an aux variable is available for writing. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
bool	isAvailableWritableAsDecoration (const std::string &name, const std::string &clsname="") const
	Check if an aux variable is available for writing as a decoration. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Decorator< T, ALLOC >::reference_type	auxdecor (const std::string &name) const
	Fetch an aux decoration, as a non-const reference. More...
template<class T , class ALLOC = AuxAllocator_t<T>>
Decorator< T, ALLOC >::reference_type	auxdecor (const std::string &name, const std::string &clsname) const
	Fetch an aux decoration, as a non-const reference. More...
void	makePrivateStore ()
	Create a new (empty) private store for this object. More...
template<class U1 >
void	makePrivateStore (const U1 &other)
	Create a new private store for this object and copy aux data. More...
template<class U1 >
void	makePrivateStore (const U1 *other)
	Create a new private store for this object and copy aux data. More...
void	releasePrivateStore ()
	Release and free any private store associated with this object. More...
void	setStore (const SG::IConstAuxStore *store)
	Set the store associated with this object. More...
void	setStore (SG::IAuxStore *store)
	Set the store associated with this object. More...
void	setStore (const DataLink< SG::IConstAuxStore > &store)
	Set the store associated with this object. More...
void	setConstStore (const SG::IConstAuxStore *store)
	Synonym for setStore with IConstAuxStore. More...
void	setNonConstStore (SG::IAuxStore *store)
	Synonym for setStore with IAuxStore. More...
bool	usingPrivateStore () const
	Test to see if this object is currently using a private store. More...
bool	usingStandaloneStore () const
	Test to see if this object is currently using a standalone store. More...
const SG::IConstAuxStore *	getConstStore () const
	Return the current store, as a const interface. More...
SG::IAuxStore *	getStore () const
	Return the current store, as a non-const interface. More...
void	clearCache ()
	Clear the cached aux data pointers. More...
const SG::auxid_set_t &	getAuxIDs () const
	Return a set of identifiers for existing data items for this object. More...
bool	hasStore () const
	Return true if this object has an associated store. More...
bool	hasNonConstStore () const
	Return true if this object has an associated non-const store. More...
bool	clearDecorations () const
	Clear all decorations. More...
bool	trackIndices () const
	Return true if index tracking is enabled for this object. More...
size_t	index () const
	Return the index of this element within its container. More...
size_t	index () const
	Return the index of this element within its container. More...

Static Public Attributes
static constexpr bool	supportsThinning = true
	Mark that this type supports thinning operations. More...

Protected Member Functions
bool	noPrivateData () const
	True if this element has no private data. More...
bool	havePrivateData () const
	True if this element currently has private data. More...
bool	hadPrivateData () const
	True if this element had private data before it was added to its current container. More...

Private Types
enum	PrivateStoreState : uint8_t { PrivateStoreState::NO_PRIVATE = 0, PrivateStoreState::HAVE_PRIVATE = 1, PrivateStoreState::HAD_PRIVATE = 2 }
	The current private data state. More...

Private Member Functions
void	releasePrivateStoreForDtor ()
	Out-of-line portion of destructor. More...
void	setIndex (size_t index, SG::AuxVectorData *container)
	Set the index/container for this element. More...
bool	setIndexPrivate (size_t index, SG::AuxVectorData *container)
	Set the index/container for this element. More...
void	makePrivateStore1 (const void *)
	Create a new private store for this object and copy aux data. More...
void	makePrivateStore1 (const AuxElement *other)
	Create a new private store for this object and copy aux data. More...
AuxElementStandaloneData *	setStore1 (const SG::IConstAuxStore *store)
	Set the store associated with this object. More...
void	clearAux ()
	Clear all aux data associated with this element. More...
void	copyAux (const ConstAuxElement &other)
	Copy aux data from another object. More...
void	setNoPrivateData ()
	Record that this element does not have private data. More...
void	setHavePrivateData ()
	Record that this element currently has private data. More...
void	setHadPrivateData ()
	Record that this element used to have private data. More...

Private Attributes
const SG::AuxVectorData *	m_container
	The container of which this object is an element. More...
size_t	m_index
	The index of this element within its container. More...
PrivateStoreState	m_privateStoreState

Friends
class	SG::ConstAuxElement
class	SG::AuxVectorBase
class	SG::AuxVectorBase_test

Detailed Description

Base class for elements of a container that can have aux data.

Classes that want to have associated auxiliary data should derive from this class. (It is also possible to use this class directly, if you want a container that only stores auxiliary data.)

The first thing that happens when you derive from AuxElement is that when an object is inserted into a DataVector, the vector will maintain information in the object telling were it is within the vector. For example:

DataVector<SG::AuxElement> v (2);
v[1] = new SG::AuxElement;
assert (v[1]->index() == 1);
assert (v[1]=>container() == &v);

As long as you don't use DataVector::stdcont or use unsafe casts, DataVector will correctly maintain this information.

When an object deriving from AuxElement is in a DataVector it may have auxiliary data associated with it; that is, named data objects of arbitrary type. The recommended way of accessing auxiliary data is through the Accessor and ConstAccessor classes, which cache the lookup between the aux data item name and its internal representation. The difference between these two is that ConstAccessor allows only const access to the element, while Accessor, which derives from it, allows non-const access as well. A given name must always have the same type, no matter where it is used (even across different classes); otherwise, an exception will be thrown. To help prevent conflicts between different classes, aux data item names may be optionally qualified with a class name. Here's an example of using ConstAccessor:

// Only need to do this once.
SG::ConstAccessor<int> vint1 ("myInt");
...
const Myclass* m = ...;
int x = vint1 (*m);

The auxdata methods can be used as a shortcut for this, but that's not recommended for anything for which performance is an issue.

You can also define getters/setters in your class:

class Myclass {
  ...
  int get_x() const
  { const static SG::ConstAccessor<int> acc ("x", "Myclass");
    return acc (*this); }
  int& get_x()
  { const static SG::Accessor<int> acc ("x", "Myclass");
    return acc (*this); }

In addition, one sometimes wants to add additional auxiliary data to an existing const container; for example, after a container has been retrieved from StoreGate. This is called ‘decoration’, and is handled by the Decorator object, which is much like Accessor and ConstAccessor. The difference is that Decorator can take a const container and return a non-const, modifiable reference. If the container has been locked by calling StoreGateSvc::setConst, then this is allowed only if this is a new auxiliary item, in which case it is marked as a decoration, or if it is already marked as a decoration. This prevents changing existing variables in a locked container. An auxdecor method is also available, analogous to auxdata.

In addition to the above, the class TypelessConstAccessor is a non-templated class that allows access to auxiliary data items directly as a void *. This is useful for code which operates on auxiliary data generically; it shouldn't really be used in other contexts.

Normally, an object can have auxiliary data only when it is part of a container. But sometimes it is useful to be able to associate aux data with an object before it has been added to a container. You can enable this by creating a ‘private store’ for the object with makePrivateStore. This can optionally take an argument from which aux data should be copied. (Using a private store adds overhead, which is why it is not enabled by default.) Example:

class Myclass : public SG::AuxElement { ... };
...
SG::Accessor<int> myint ("myint");
const Myclass* m = new Myclass;
m->makePrivateStore();
myint(*m) = 10;
DataVector<Myclass> v;
v.push_back(m);
assert (myint(v[0]) == 10);

When an object with a private store is added to a container, the aux data is copied to the container and the private store is released. However, the fact that we had a private store is remembered; if the object is later removed from the container, the private store will be remade, and the aux data will be copied back from the container to the private store. To explicitly release the private store (so that it won't come back automatically), call releasePrivateStore.

If you add makePrivateStore calls to the constructors of your class, then you should be able to treat aux data as if it were part of the object itself; the required copying will be handled automatically.

class Myclass : public SG::AuxElement
{
public:
  Myclass() { makePrivateStore(); }
  Myclass(const Myclass* other) { makePrivateStore(other); }

The SG::AuxElementComplete template class may be helpful in setting this up.

It is also possible to associate one of these objects with an external aux data store. This is the ‘standalone’ mode. To do this, use the setStore methods, exactly as you would for a container that has aux data. setStore will throw an exception if the object is a member of a container or has a private store.

This class should not have any virtual methods (to avoid forcing derived classes to have a vtable).

Definition at line 440 of file AuxElement.h.

Member Typedef Documentation

Accessor

template<class T , class ALLOC = AuxAllocator_t<T>>

using SG::AuxElement::Accessor = SG::Accessor<T, ALLOC>

Definition at line 522 of file AuxElement.h.

ConstAccessor

template<class T , class ALLOC = AuxAllocator_t<T>>

using SG::AuxElement::ConstAccessor = SG::ConstAccessor<T, ALLOC>

Definition at line 519 of file AuxElement.h.

Decorator

template<class T , class ALLOC = AuxAllocator_t<T>>

using SG::AuxElement::Decorator = SG::Decorator<T, ALLOC>

Definition at line 525 of file AuxElement.h.

TypelessConstAccessor

using SG::AuxElement::TypelessConstAccessor = ConstAuxElement::TypelessConstAccessor

Definition at line 516 of file AuxElement.h.

Member Enumeration Documentation

PrivateStoreState

enum SG::IAuxElement::PrivateStoreState : uint8_t

strongprivateinherited

The current private data state.

Enumerator
NO_PRIVATE
HAVE_PRIVATE
HAD_PRIVATE

Definition at line 131 of file IAuxElement.h.

  {
    NO_PRIVATE = 0,
    HAVE_PRIVATE = 1,
    HAD_PRIVATE = 2,
  };

Constructor & Destructor Documentation

AuxElement() [1/3]

SG::AuxElement::AuxElement

(

)

Default constructor.

AuxElement() [2/3]

SG::AuxElement::AuxElement	(	SG::AuxVectorData *	container,
		size_t	index
	)

Constructor with explicit container / index.

Parameters

container	Container of which this element will be a part.
index	Index of this element within the container.

This does not make any changes to aux data.

AuxElement() [3/3]

SG::AuxElement::AuxElement

(

const AuxElement &

other

)

Copy Constructor.

Parameters

other

Object being copied.

We do not copy the container/index — the new object is not yet in a container!

In the case of constructing an object with a private store, makePrivateStore will take care of copying the aux data.

~AuxElement()

SG::AuxElement::~AuxElement

(

)

Destructor.

Any private store is deleted.

Member Function Documentation

auxdata() [1/4]

template<class T , class ALLOC = AuxAllocator_t<T>>

Accessor<T, ALLOC>::reference_type SG::AuxElement::auxdata

(

const std::string &

name

)

Fetch an aux data variable, as a non-const reference.

Parameters

name	Name of the aux variable.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor class.

auxdata() [2/4]

template<class T , class ALLOC = AuxAllocator_t<T>>

Accessor<T, ALLOC>::const_reference_type SG::AuxElement::auxdata

(

const std::string &

name

)

const

Fetch an aux data variable, as a const reference.

Parameters

name	Name of the aux variable.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor or ConstAccessor classes.

auxdata() [3/4]

template<class T , class ALLOC = AuxAllocator_t<T>>

Accessor<T, ALLOC>::reference_type SG::AuxElement::auxdata	(	const std::string &	name,
		const std::string &	clsname
	)

Fetch an aux data variable, as a non-const reference.

Parameters

name	Name of the aux variable.
clsname	The name of the associated class. May be blank.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor class.

auxdata() [4/4]

template<class T , class ALLOC = AuxAllocator_t<T>>

Accessor<T, ALLOC>::const_reference_type SG::AuxElement::auxdata	(	const std::string &	name,
		const std::string &	clsname
	)		const

Fetch an aux data variable, as a const reference.

Parameters

name	Name of the aux variable.
clsname	The name of the associated class. May be blank.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor or ConstAccessor classes.

auxdataConst() [1/2]

template<class T , class ALLOC = AuxAllocator_t<T>>

Accessor<T, ALLOC>::const_reference_type SG::AuxElement::auxdataConst

(

const std::string &

name

)

const

Fetch an aux data variable, as a const reference.

Parameters

name	Name of the aux variable.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the ConstAccessor class.

auxdataConst() [2/2]

template<class T , class ALLOC = AuxAllocator_t<T>>

Accessor<T, ALLOC>::const_reference_type SG::AuxElement::auxdataConst	(	const std::string &	name,
		const std::string &	clsname
	)		const

Fetch an aux data variable, as a const reference.

Parameters

name	Name of the aux variable.
clsname	The name of the associated class. May be blank.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the ConstAccessor class.

auxdecor() [1/2]

template<class T , class ALLOC = AuxAllocator_t<T>>

Decorator<T, ALLOC>::reference_type SG::AuxElement::auxdecor

(

const std::string &

name

)

const

Fetch an aux decoration, as a non-const reference.

Parameters

name	Name of the aux variable.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor class.

If the container is locked, this will allow fetching only variables that do not yet exist (in which case they will be marked as decorations) or variables already marked as decorations.

auxdecor() [2/2]

template<class T , class ALLOC = AuxAllocator_t<T>>

Decorator<T, ALLOC>::reference_type SG::AuxElement::auxdecor	(	const std::string &	name,
		const std::string &	clsname
	)		const

Fetch an aux decoration, as a non-const reference.

Parameters

name	Name of the aux variable.
clsname	The name of the associated class. May be blank.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor class.

If the container is locked, this will allow fetching only variables that do not yet exist (in which case they will be marked as decorations) or variables already marked as decorations.

clearAux()

void SG::AuxElement::clearAux ( )

private

Clear all aux data associated with this element.

If this object has no associated store, this does nothing. If the associated aux data is const, this throws ExcConstAuxData.

Definition at line 535 of file AuxElement.cxx.

{
  if (!m_container) return;
  if (!m_container->hasStore()) return;
  if (!m_container->hasNonConstStore())
    throw SG::ExcConstAuxData ("clearAux", SG::null_auxid);
 
  SG::AuxTypeRegistry& r = SG::AuxTypeRegistry::instance();
  for (SG::auxid_t auxid : m_container->getWritableAuxIDs()) {
    r.clear (auxid, *container(), index(), 1);
  }
}

clearCache()

void SG::AuxElement::clearCache

(

)

Clear the cached aux data pointers.

You should call this any time something changes in the aux store that could invalidate the vector pointers.

Definition at line 319 of file AuxElement.cxx.

{
  if (container())
    container()->clearCache();
}

clearDecorations()

bool SG::AuxElement::clearDecorations

(

)

const

Clear all decorations.

Erase all decorations from an associated store, restoring the state to when lock was called.

Returns true if there were any decorations that were cleared, false if the store did not contain any decorations.

Definition at line 385 of file AuxElement.cxx.

{
  if (havePrivateData())
    return m_container->clearDecorations();
  return false;
}

container() [1/2]

SG::AuxVectorData* SG::AuxElement::container

(

)

Return the container holding this element.

container() [2/2]

const SG::AuxVectorData* SG::AuxElement::container

(

)

const

Return the container holding this element.

copyAux()

void SG::AuxElement::copyAux ( const ConstAuxElement &  other )

private

Copy aux data from another object.

Parameters

other

The object from which to copy.

If this object has no associated store, this does nothing. If the associated aux data is const, this throws ExcConstAuxData.

All aux data items from other are copied to this object. Any aux data items associated with this object that are not present in other are cleared. (If other has no aux data, then all aux data items for this object are cleared.)

Definition at line 561 of file AuxElement.cxx.

{
  if (!m_container) return;
  if (!m_container->hasStore()) return;
  if (!m_container->hasNonConstStore())
    throw SG::ExcConstAuxData ("copyAux");
 
  const SG::AuxVectorData* ocont = other.container();
 
  if (!ocont || !ocont->hasStore()) {
    this->clearAux();
    return;
  }
 
  size_t oindex = other.index();
  SG::auxid_set_t other_ids = ocont->getAuxIDs();
 
  SG::AuxTypeRegistry& r = SG::AuxTypeRegistry::instance();
 
  SG::AuxVectorData& cont = *container();
  for (SG::auxid_t auxid : other_ids) {
    r.copy (auxid, cont, index(), *ocont, oindex, 1);
  }
 
  for (SG::auxid_t auxid : m_container->getWritableAuxIDs()) {
    if (!other_ids.test (auxid)) {
      r.clear (auxid, cont, index(), 1);
    }
  }
}

getAuxIDs()

const SG::auxid_set_t & SG::AuxElement::getAuxIDs

(

)

const

Return a set of identifiers for existing data items for this object.

If this object has a private or standalone store, then information from that will be returned. Otherwise, if this element is part of a container, then information for the container will be returned. Otherwise, return an empty set.

Definition at line 335 of file AuxElement.cxx.

{
#ifdef ATHCONTAINERS_R21_COMPAT
  if (havePrivateData())
    return m_container->getConstStore()->getAuxIDs();
  if (container())
    return container()->getAuxIDs();
  static const SG::auxid_set_t null_set;
  return null_set;
#else
  return ConstAuxElement::getAuxIDs();
#endif
}

getConstStore()

const SG::IConstAuxStore * SG::AuxElement::getConstStore

(

)

const

Return the current store, as a const interface.

This will be non-zero if either a const or non-const store is associated with this object. This will fetch either a private or standalone store.

Definition at line 284 of file AuxElement.cxx.

{
  if (havePrivateData()) {
    return m_container->getConstStore();
  }
  return 0;
}

getStore()

SG::IAuxStore * SG::AuxElement::getStore

(

)

const

Return the current store, as a non-const interface.

This will be non-zero if a non-const store is associated with this object. This will fetch either a private or standalone store.

Definition at line 299 of file AuxElement.cxx.

{
  if (havePrivateData()) {
#ifdef ATHCONTAINERS_R21_COMPAT
    SG::AuxVectorData* container_nc ATLAS_THREAD_SAFE = m_container;
#else
    SG::AuxVectorData* container_nc ATLAS_THREAD_SAFE = const_cast<SG::AuxVectorData*>(container());
#endif
    return container_nc->getStore();
  }
  return 0;
}

hadPrivateData()

bool SG::IAuxElement::hadPrivateData ( ) const

protectedinherited

True if this element had private data before it was added to its current container.

hasNonConstStore()

bool SG::AuxElement::hasNonConstStore

(

)

const

Return true if this object has an associated non-const store.

This will be true for either a private or standalone store.

Definition at line 368 of file AuxElement.cxx.

{
  if (havePrivateData())
    return m_container->hasNonConstStore();
  return false;
}

hasStore()

bool SG::AuxElement::hasStore

(

)

const

Return true if this object has an associated store.

This will be true for either a private or standalone store.

Definition at line 355 of file AuxElement.cxx.

{
  if (havePrivateData())
    return m_container->hasStore();
  return false;
}

havePrivateData()

bool SG::IAuxElement::havePrivateData ( ) const

protectedinherited

True if this element currently has private data.

index() [1/2]

size_t SG::IAuxElement::index ( ) const

inherited

Return the index of this element within its container.

index() [2/2]

size_t SG::IAuxElement::index

Return the index of this element within its container.

Inherited from IAuxElement.

isAvailable()

template<class T , class ALLOC = AuxAllocator_t<T>>

bool SG::AuxElement::isAvailable	(	const std::string &	name,
		const std::string &	clsname = ""
	)		const

Check if an aux variable is available for reading.

Parameters

name	Name of the aux variable.
clsname	The name of the associated class. May be blank.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor class.

isAvailableWritable()

template<class T , class ALLOC = AuxAllocator_t<T>>

bool SG::AuxElement::isAvailableWritable	(	const std::string &	name,
		const std::string &	clsname = ""
	)

Check if an aux variable is available for writing.

Parameters

name	Name of the aux variable.
clsname	The name of the associated class. May be blank.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor class.

isAvailableWritableAsDecoration()

template<class T , class ALLOC = AuxAllocator_t<T>>

bool SG::AuxElement::isAvailableWritableAsDecoration	(	const std::string &	name,
		const std::string &	clsname = ""
	)		const

Check if an aux variable is available for writing as a decoration.

Parameters

name	Name of the aux variable.
clsname	The name of the associated class. May be blank.

This method has to translate from the aux data name to the internal representation each time it is called. Using this method inside of loops is discouraged; instead use the Accessor class.

makePrivateStore() [1/3]

void SG::AuxElement::makePrivateStore

(

)

Create a new (empty) private store for this object.

ExcBadPrivateStore will be thrown if this object is already associated with a store.

Definition at line 172 of file AuxElement.cxx.

{
  if (m_container) {
    throw SG::ExcBadPrivateStore ("store already exists");
  }
 
  m_container = new SG::AuxElementPrivateData;
  IAuxElement::setIndex (0);
  IAuxElement::setHavePrivateData();
}

makePrivateStore() [2/3]

template<class U1 >

void SG::AuxElement::makePrivateStore

(

const U1 &

other

)

Create a new private store for this object and copy aux data.

Parameters

other

The object from which aux data should be copied.

ExcBadPrivateStore will be thrown if this object is already associated with a store.

If other is an object that has aux data, then those data will be copied; otherwise, nothing will be done.

makePrivateStore() [3/3]

template<class U1 >

void SG::AuxElement::makePrivateStore

(

const U1 *

other

)

Create a new private store for this object and copy aux data.

Parameters

other

The object from which aux data should be copied.

ExcBadPrivateStore will be thrown if this object is already associated with a store.

If other is an object that has aux data, then those data will be copied; otherwise, nothing will be done.

makePrivateStore1() [1/2]

void SG::AuxElement::makePrivateStore1 ( const AuxElement *  other )

private

Create a new private store for this object and copy aux data.

Parameters

other

The object from which aux data should be copied.

ExcBadPrivateStore will be thrown if this object is already associated with a store.

This overload handles the case where other does have aux data.

Definition at line 521 of file AuxElement.cxx.

{
  makePrivateStore();
  if (other)
    this->copyAux (*other);
}

makePrivateStore1() [2/2]

void SG::AuxElement::makePrivateStore1 ( const void *  )

private

Create a new private store for this object and copy aux data.

Parameters

other

The object from which aux data should be copied.

ExcBadPrivateStore will be thrown if this object is already associated with a store.

This overload handles the case where other does not have aux data.

noPrivateData()

bool SG::IAuxElement::noPrivateData ( ) const

protectedinherited

True if this element has no private data.

operator=()

AuxElement& SG::AuxElement::operator=

(

const AuxElement &

other

)

Assignment.

Parameters

other

The object from which we're assigning.

We don't copy container/index, as assignment doesn't change where this object is. However, if we have aux data, then we copy aux data if we're copying from an object that also has it; otherwise, if we're copying from an object with no aux data, then we clear ours.

releasePrivateStore()

void SG::AuxElement::releasePrivateStore

(

)

Release and free any private store associated with this object.

ExcBadPrivateStore will be thrown if this object does not have a private store.

Definition at line 190 of file AuxElement.cxx.

{
  if (hadPrivateData()) {
    // We had a private store, but it was released because this object
    // was added to a container.  Just forget about it.
    IAuxElement::setNoPrivateData();
    return;
  }
 
  if (!havePrivateData() ||
      !m_container ||
      typeid(*m_container) != typeid(AuxElementPrivateData))
  {
    throw SG::ExcBadPrivateStore ("no private store exists");
  }
 
  IAuxElement::setIndex (0);
  IAuxElement::setNoPrivateData();
  delete m_container;
  m_container = 0;
}

releasePrivateStoreForDtor()

void SG::AuxElement::releasePrivateStoreForDtor ( )

private

Out-of-line portion of destructor.

Delete a private store if we have one.

Definition at line 398 of file AuxElement.cxx.

{
#ifdef ATHCONTAINERS_R21_COMPAT
  if (havePrivateData()) {
    delete m_container;
  }
#else
  ConstAuxElement::releasePrivateStoreForDtor();
#endif
}

setConstStore()

void SG::AuxElement::setConstStore

(

const SG::IConstAuxStore *

store

)

Synonym for setStore with IConstAuxStore.

Parameters

store

The new store.

setHadPrivateData()

void SG::IAuxElement::setHadPrivateData ( )

privateinherited

Record that this element used to have private data.

setHavePrivateData()

void SG::IAuxElement::setHavePrivateData ( )

privateinherited

Record that this element currently has private data.

setIndex()

void SG::AuxElement::setIndex ( size_t  index, SG::AuxVectorData *  container  )

private

Set the index/container for this element.

Parameters

index	The index of this object within the container.
container	The container holding this object. May be null if this object is being removed from a container.

Usually this simply sets the index and container members of this object. However, in the case where this object has an associated private store, then we need to deal with releasing the store if the object is being added to a container, or making a new store if the object is being removed from a container.

setIndexPrivate()

bool SG::AuxElement::setIndexPrivate ( size_t  index, SG::AuxVectorData *  container  )

private

Set the index/container for this element.

Parameters

index	The index of this object within the container.
container	The container holding this object. May be null if this object is being removed from a container.

This is called from setIndex when we have a private store to deal with.

Definition at line 462 of file AuxElement.cxx.

{
#ifdef ATHCONTAINERS_R21_COMPAT
  if (hadPrivateData()) {
    // We had a private store, but it was released because we were added
    // to a container.
 
    if (container == 0) {
      // We're being moved out of the container.  Make a new private
      // store, copy the data, and switch to it.
      auto privateData = new SG::AuxElementPrivateData;
      AuxElement to (privateData, 0);
      to.copyAux (*this);
      IAuxElement::setIndex (0);
      IAuxElement::setHavePrivateData();
      m_container = privateData;
      return true;
    }
  }
  else if (havePrivateData() &&
           typeid(*m_container) == typeid(AuxElementPrivateData))
  {
    // We currently have a private store.
 
    if (container != 0 && container != m_container) {
      // We're being added to a container.
      // Aux data has already been copied.
      // Release private store.
      IAuxElement::setIndex (index);
      IAuxElement::setHadPrivateData();
      delete m_container;
      m_container = container;
      return false;
    }
  }
  else {
    // We have a standalone store.
    throw SG::ExcBadPrivateStore ("Attempt to add/remove a standalone object "
                                  "from a container.");
  }
 
  IAuxElement::setIndex (index);
  m_container = container;
  return false;
#else
  return ConstAuxElement::setIndexPrivate (index, container);
#endif
}

setNonConstStore()

void SG::AuxElement::setNonConstStore

(

SG::IAuxStore *

store

)

Synonym for setStore with IAuxStore.

Parameters

store

The new store.

setNoPrivateData()

void SG::IAuxElement::setNoPrivateData ( )

privateinherited

Record that this element does not have private data.

setStore() [1/3]

void SG::AuxElement::setStore

(

const DataLink< SG::IConstAuxStore > &

store

)

Set the store associated with this object.

Parameters

store

The new store.

If store is nonzero, this adds a standalone store to the object. The object must not be in a container and must not have a private store. If store is zero, this removes a standalone store.

Parameters

store

Link to the new store.

Definition at line 249 of file AuxElement.cxx.

{
  AuxElementStandaloneData* data = setStore1 (store);
  if (store)
    data->setStore (store);
}

setStore() [2/3]

void SG::AuxElement::setStore

(

const SG::IConstAuxStore *

store

)

Set the store associated with this object.

Parameters

store

The new store.

If store is nonzero, this adds a standalone store to the object. The object must not be in a container and must not have a private store. If store is zero, this removes a standalone store.

Definition at line 221 of file AuxElement.cxx.

{
  AuxElementStandaloneData* data = setStore1 (store);
  if (store)
    data->setStore (store);
}

setStore() [3/3]

void SG::AuxElement::setStore

(

SG::IAuxStore *

store

)

Set the store associated with this object.

Parameters

store

The new store.

If store is nonzero, this adds a standalone store to the object. The object must not be in a container and must not have a private store. If store is zero, this removes a standalone store.

Definition at line 237 of file AuxElement.cxx.

{
  AuxElementStandaloneData* data = setStore1 (store);
  if (store)
    data->setStore (store);
}

setStore1()

AuxElementStandaloneData * SG::AuxElement::setStore1 ( const SG::IConstAuxStore *  store )

private

Set the store associated with this object.

Parameters

store

The new store.

Helper for setStore. Creates the AuxElementStandaloneData object if needed and returns it.

Parameters

store

The new store.

Helper for setStore. Creates the @x AuxElementStandaloneData object if needed and returns it.

Definition at line 418 of file AuxElement.cxx.

{
  if (store) {
    // Want this object be standalone.
    if (!m_container) {
      // Not in a container (and no private store).  Make a new object.
      AuxElementStandaloneData* data = new AuxElementStandaloneData;
      IAuxElement::setHavePrivateData();
      m_container = data;
      return data;
    }
    if (usingStandaloneStore()) {
      // Standalone --- return existing object.
      return static_cast<AuxElementStandaloneData*> (container());
    }
    // Otherwise, it's an error.
    throw ExcBadPrivateStore ("Attempt to attach a standalone store to an "
                              "object in a container or with a private store.");
  }
 
  else {
    // Getting rid of a standalone store.
    if (usingStandaloneStore()) {
      IAuxElement::setNoPrivateData();
      delete m_container;
      m_container = 0;
    }
    else if (m_container != 0)
      throw ExcBadPrivateStore ("Attempt to remove a standalone store from an "
                                "object in a container or with a private store.");
    return 0;
  }
}

trackIndices()

bool SG::AuxElement::trackIndices

(

)

const

Return true if index tracking is enabled for this object.

Always returns true. Included here to be consistent with AuxVectorBase when standalone objects may be used as template parameters.

usingPrivateStore()

bool SG::AuxElement::usingPrivateStore

(

)

const

Test to see if this object is currently using a private store.

Definition at line 260 of file AuxElement.cxx.

{
  return havePrivateData() && 
    typeid(*m_container) == typeid(AuxElementPrivateData);
}

usingStandaloneStore()

bool SG::AuxElement::usingStandaloneStore

(

)

const

Test to see if this object is currently using a standalone store.

Test to see if this object is currently using a private store.

Definition at line 270 of file AuxElement.cxx.

{
  return havePrivateData() &&
    typeid(*m_container) == typeid(AuxElementStandaloneData);
}

Friends And Related Function Documentation

SG::AuxVectorBase

friend class SG::AuxVectorBase

friend

Definition at line 888 of file AuxElement.h.

SG::AuxVectorBase_test

friend class SG::AuxVectorBase_test

friend

Definition at line 889 of file AuxElement.h.

SG::ConstAuxElement

friend class SG::ConstAuxElement

friend

Definition at line 887 of file AuxElement.h.

Member Data Documentation

m_container

const SG::AuxVectorData* SG::ConstAuxElement::m_container

privateinherited

The container of which this object is an element.

Should be null if this object is not within a container, except that it may also point at a private store.

Definition at line 298 of file AuxElement.h.

m_index

size_t SG::IAuxElement::m_index

privateinherited

The index of this element within its container.

Should be 0 if this object is not within a container.

Definition at line 128 of file IAuxElement.h.

m_privateStoreState

PrivateStoreState SG::IAuxElement::m_privateStoreState

privateinherited

Definition at line 137 of file IAuxElement.h.

supportsThinning

constexpr bool SG::AuxElement::supportsThinning = true

staticconstexpr

Mark that this type supports thinning operations.

See AthContainers/supportsThinning.h and AthenaPoolCnvSvc/T_AthenaPoolCnv.h. Helps guide which pool converter template will be used. If false, the default pool converter will be used rather than the aux store-specific one. Ordinary xAOD type should not touch this, but may be overridden in a derived class to handle certain special cases.

Definition at line 883 of file AuxElement.h.

---

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

• AuxElement.h
• AuxElement.cxx