A proxy dictionary. More...

#include <IProxyDict.h>

Inheritance diagram for IProxyDict:

Collaboration diagram for IProxyDict:

Public Types
typedef SG::sgkey_t	sgkey_t
	Type of the keys. More...

Public Member Functions
	DeclareInterfaceID (IProxyDict, 2, 0)

virtual	~IProxyDict () override

virtual SG::DataProxy *	proxy_exact (SG::sgkey_t sgkey) const =0
	Get proxy given a hashed key+clid. More...

virtual SG::DataProxy *	proxy (const CLID &id, const std::string &key) const =0
	Get proxy with given id and key. More...

virtual SG::DataProxy *	proxy (const void *const pTransient) const =0
	Get a proxy referencing a given transient object. More...

virtual std::vector< const SG::DataProxy * >	proxies () const =0
	Return the list of all current proxies in store. More...

virtual StatusCode	addToStore (CLID id, SG::DataProxy *proxy)=0
	Add a new proxy to the store. More...

virtual SG::DataProxy *	recordObject (SG::DataObjectSharedPtr< DataObject > obj, const std::string &key, bool allowMods, bool returnExisting)=0
	Record an object in the store. More...

virtual void	boundHandle (IResetable *handle)
	Tell the store that a handle has been bound to a proxy. More...

virtual void	unboundHandle (IResetable *handle)
	Tell the store that a handle has been unbound from a proxy. More...

virtual bool	tryELRemap (sgkey_t sgkey_in, size_t index_in, sgkey_t &sgkey_out, size_t &index_out)
	Test to see if the target of an ElementLink has moved. More...

virtual StatusCode	createObj (IConverter cvt, IOpaqueAddress addr, DataObject *&refpObject)
	Call converter to create an object, possibly with locking. More...

virtual IProxyDict *	hiveProxyDict () override
	Return the current event-slot-specific store. More...

virtual SG::SourceID	sourceID (const std::string &key="EventSelector") const
	Return the metadata source ID for the current event slot. More...

virtual sgkey_t	stringToKey (const std::string &str, CLID clid)=0
	Find the key for a string/CLID pair. More...

virtual const std::string *	keyToString (sgkey_t key) const =0
	Find the string corresponding to a given key. More...

virtual const std::string *	keyToString (sgkey_t key, CLID &clid) const =0
	Find the string and CLID corresponding to a given key. More...

virtual void	registerKey (sgkey_t key, const std::string &str, CLID clid)=0
	Remember an additional mapping from key to string/CLID. More...

Detailed Description

A proxy dictionary.

This is the internal interface used by StoreGateSvc and similar. It provides interfaces for taking a set of DataProxy objects and looking them up by either CLID+key or by a pointer to the transient objects.

Objects can be identified by either a CLID+key pair or by a hash of this data. This interface also provides methods for converting between the two representations.

Author: Paolo Calafiura - ATLAS

Definition at line 45 of file AthenaKernel/AthenaKernel/IProxyDict.h.

Member Typedef Documentation

◆ sgkey_t

typedef SG::sgkey_t IStringPool::sgkey_t

inherited

Type of the keys.

Definition at line 34 of file IStringPool.h.

Constructor & Destructor Documentation

◆ ~IProxyDict()

virtual IProxyDict::~IProxyDict ( )

inlineoverridevirtual

Definition at line 50 of file AthenaKernel/AthenaKernel/IProxyDict.h.

50 {}

Member Function Documentation

◆ addToStore()

virtual StatusCode IProxyDict::addToStore	(	CLID	id,
		SG::DataProxy *	proxy
	)

pure virtual

Add a new proxy to the store.

Parameters

id	CLID as which the proxy should be added.
proxy	The proxy to add.

Simple addition of a proxy to the store. The key is taken as the primary key of the proxy. Does not handle things like overwrite, history, symlinks, etc. Should return failure if there is already an entry for this clid/key.

◆ boundHandle()

void IProxyDict::boundHandle ( IResetable * handle )

virtual

Tell the store that a handle has been bound to a proxy.

Parameters

handle The handle that was bound. The default implementation does nothing.

Definition at line 23 of file IProxyDict.cxx.

24 {

25 }

◆ createObj()

StatusCode IProxyDict::createObj	(	IConverter *	cvt,
		IOpaqueAddress *	addr,
		DataObject *&	refpObject
	)

virtual

Call converter to create an object, possibly with locking.

Parameters

cvt	The converter to call.
addr	Opaque address information for the object to create.
refpObject	Reference to location of the pointer of the created object.

This calls the createObj method on cvt to create the referenced transient object.

This will also lock the store, if that is required.

The default implementation just forwards the method call, with no locking.

Definition at line 70 of file IProxyDict.cxx.

 {
   return cvt->createObj (addr, refpObject);
 }

◆ DeclareInterfaceID()

IProxyDict::DeclareInterfaceID	(	IProxyDict	,
		2	,
		0
	)

◆ hiveProxyDict()

IProxyDict * IProxyDict::hiveProxyDict ( )

overridevirtual

Return the current event-slot-specific store.

The default version just returns this.

Definition at line 83 of file IProxyDict.cxx.

 {
   return this;
 }

◆ keyToString() [1/2]

virtual const std::string* IStringPool::keyToString ( sgkey_t key ) const

pure virtualinherited

Find the string corresponding to a given key.

Parameters

key	The key to look up.

Returns: Pointer to the string found, or null. We can find keys as long as the corresponding string was given to either stringToKey() or registerKey().

◆ keyToString() [2/2]

virtual const std::string* IStringPool::keyToString	(	sgkey_t	key,
		CLID &	clid
	)		const

pure virtualinherited

Find the string and CLID corresponding to a given key.

Parameters

key	The key to look up.
clid[out]	The found CLID.

Returns: Pointer to the string found, or null. We can find keys as long as the corresponding string was given to either stringToKey() or registerKey().

◆ proxies()

virtual std::vector<const SG::DataProxy*> IProxyDict::proxies ( ) const

pure virtual

Return the list of all current proxies in store.

◆ proxy() [1/2]

virtual SG::DataProxy* IProxyDict::proxy	(	const CLID &	id,
		const std::string &	key
	)		const

pure virtual

Get proxy with given id and key.

Parameters

id	The `CLID` of the desired object.
key	The key of the desired object.

If the key is a null string, then it is a default key. Finding a proxy via the default key should succeed only if there is exactly one object with the given CLID in the store. Finding a proxy via a default key is considered deprecated for the case of the event store.

Returns 0 to flag failure

◆ proxy() [2/2]

virtual SG::DataProxy* IProxyDict::proxy ( const void *const pTransient ) const

pure virtual

Get a proxy referencing a given transient object.

Parameters

pTransient The object to find.

Returns 0 to flag failure

◆ proxy_exact()

virtual SG::DataProxy* IProxyDict::proxy_exact ( SG::sgkey_t sgkey ) const

pure virtual

Get proxy given a hashed key+clid.

Parameters

sgkey Hashed key to look up.

Find an exact match; no handling of aliases, etc. Returns 0 to flag failure.

◆ recordObject()

virtual SG::DataProxy* IProxyDict::recordObject	(	SG::DataObjectSharedPtr< DataObject >	obj,
		const std::string &	key,
		bool	allowMods,
		bool	returnExisting
	)

pure virtual

Record an object in the store.

Parameters

obj	The data object to store.
key	The key as which it should be stored.
allowMods	If false, the object will be recorded as const.
returnExisting	If true, return proxy if this key already exists. If the object has been recorded under a different key, then make an alias. If the object has been recorded under a different clid, then make a link.

Full-blown record. obj should usually be something deriving from SG::DataBucket.

Returns the proxy for the recorded object; nullptr on failure. If the requested CLID/key combination already exists in the store, the behavior is controlled by returnExisting. If true, then the existing proxy is returned; otherwise, nullptr is returned. In either case, obj is destroyed.

◆ registerKey()

virtual void IStringPool::registerKey	(	sgkey_t	key,
		const std::string &	str,
		CLID	clid
	)

pure virtualinherited

Remember an additional mapping from key to string/CLID.

Parameters

key	The key to enter.
str	The string to enter.
clid	The CLID associated with the string.

Returns: True if successful; false if the key already corresponds to a different string.

This registers an additional mapping from a key to a string; it can be found later through lookup() on the string. Logs an error if key already corresponds to a different string.

◆ sourceID()

SG::SourceID IProxyDict::sourceID ( const std::string & key = "EventSelector" ) const

virtual

Return the metadata source ID for the current event slot.

Parameters

key	SG key of the DataHeader to query. Returns an empty string if no source has been set.

The default version always returns an empty string.

Definition at line 97 of file IProxyDict.cxx.

 {
   return SG::SourceID();
 }

◆ stringToKey()

virtual sgkey_t IStringPool::stringToKey	(	const std::string &	str,
		CLID	clid
	)

pure virtualinherited

Find the key for a string/CLID pair.

Parameters

str	The string to look up.
clid	The CLID associated with the string.

Returns: A key identifying the string. A given string will always return the same key. Will abort in case of a hash collision!

◆ tryELRemap()

bool IProxyDict::tryELRemap	(	sgkey_t	sgkey_in,
		size_t	index_in,
		sgkey_t &	sgkey_out,
		size_t &	index_out
	)

virtual

Test to see if the target of an ElementLink has moved.

Parameters

sgkey_in	Original hashed key of the EL.
index_in	Original index of the EL.
sgkey_out[out]	New hashed key for the EL.
index_out[out]	New index for the EL.

Returns: True if there is a remapping; false otherwise.

The default implementation here always returns false.

Definition at line 48 of file IProxyDict.cxx.

 {
   return false;
 }

◆ unboundHandle()

void IProxyDict::unboundHandle ( IResetable * handle )

virtual

Tell the store that a handle has been unbound from a proxy.

Parameters

handle The handle that was unbound. The default implementation does nothing.

Definition at line 33 of file IProxyDict.cxx.

34 {

35 }

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

Public Types

Public Member Functions

Detailed Description

Member Typedef Documentation

◆ sgkey_t

Constructor & Destructor Documentation

◆ ~IProxyDict()

Member Function Documentation

◆ addToStore()

◆ boundHandle()

◆ createObj()

◆ DeclareInterfaceID()

◆ hiveProxyDict()

◆ keyToString() [1/2]

◆ keyToString() [2/2]

◆ proxies()

◆ proxy() [1/2]

◆ proxy() [2/2]

◆ proxy_exact()

◆ recordObject()

◆ registerKey()

◆ sourceID()

◆ stringToKey()

◆ tryELRemap()

◆ unboundHandle()