A small class used to access easily (and efficiently) data items residing in data stores. More...

#include <GaudiKernel/SmartDataLocator.h>

Inheritance diagram for SmartDataLocator< TYPE >:

Collaboration diagram for SmartDataLocator< TYPE >:

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Public Member Functions
	SmartDataLocator (IDataProviderSvc *pService, const std::string &fullPath)
	Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent. More...

	SmartDataLocator (IDataProviderSvc pService, IRegistry pDirectory)
	Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its directory entry. More...

	SmartDataLocator (IDataProviderSvc pService, DataObject pObject, const std::string &path)
	Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent. More...

	SmartDataLocator (SmartDataObjectPtr &refObject, IRegistry *pDirectory)
	Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent. More...

	SmartDataLocator (SmartDataObjectPtr &refObject, const std::string &path)
	Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent. More...

virtual	~SmartDataLocator ()
	Standard destructor. More...

template<class OTHER >
SmartDataPtr< OTHER > &	operator= (OTHER *pObj)
	Automatic conversion to data type. More...

template<class OTHER >
SmartDataPtr< OTHER > &	operator= (const OTHER *pObj)
	Automatic conversion to data type. More...

Public Member Functions inherited from SmartDataStorePtr< TYPE, SmartDataObjectPtr::ObjectLoader >
	SmartDataStorePtr (IDataProviderSvc pService, IRegistry pRegistry, const std::string &path)
	Standard constructor: Construct an SmartDataStorePtr instance which is able to connect to a DataObject instance which is identified by its directory entry. More...

	SmartDataStorePtr (const SmartDataObjectPtr &copy)
	Copy constructor: Construct an copy of a SmartDataStorePtr instance. More...

virtual	~SmartDataStorePtr ()
	Standard Destructor. More...

SmartDataStorePtr &	operator= (DataObject *pObj)
	Automatic conversion to data type. More...

SmartDataStorePtr &	operator= (const DataObject *pObj)
	Automatic conversion to data type. More...

SmartDataStorePtr &	operator= (const SmartDataObjectPtr &copy) override
	unhides assignment operator of base class More...

TYPE *	ptr ()
	Automatic conversion to data type. More...

TYPE *	operator-> ()
	Dereference operator: the heart of the smart pointer. More...

TYPE &	operator* ()
	Dereference operator: the heart of the smart pointer. More...

	operator TYPE * ()
	Automatic conversion to data type. More...

	operator TYPE & ()
	Automatic conversion to data type. More...

	operator int ()
	operator int for statements like: if ( SmartDataStorePtr<XXX>(...) ) {} More...

bool	operator! ()
	operator ! for statements like: if ( !SmartDataStorePtr<XXX>(...) ) {} More...

TYPE *	accessTypeSafeData ()
	Internal type safe accessor to data. More...

Public Member Functions inherited from SmartDataObjectPtr
	SmartDataObjectPtr (AccessFunction access, IDataProviderSvc pService, IRegistry pDir, std::string path)
	Standard constructor: Construct an SmartDataObjectPtr instance. More...

	SmartDataObjectPtr (const SmartDataObjectPtr &)=default
	Copy constructor: Construct an copy of a SmartDataStorePtr instance. More...

virtual	~SmartDataObjectPtr ()=default
	Standard Destructor. More...

	operator IRegistry * ()
	Automatic conversion to data directory. More...

const std::string &	path () const
	Path name. More...

IRegistry *	directory ()
	Access to data directory. More...

void	setService (IDataProviderSvc *svc)
	Assign data service. More...

IDataProviderSvc *	service ()
	Retrieve data service. More...

const StatusCode &	getLastError () const
	Access to potential errors during data accesses. More...

DataObject *	accessData ()
	Static Object retrieval method: must call specific function. More...

DataObject *	retrieveObject ()
	Object retrieve method. More...

DataObject *	findObject ()
	Object find method. More...

DataObject *	updateObject ()
	Object update method. More...

Additional Inherited Members
Public Types inherited from SmartDataObjectPtr
using	AccessFunction = DataObject ()(SmartDataObjectPtr *ptr)

Static Public Member Functions inherited from SmartDataObjectPtr
static DataObject *	retrieve (SmartDataObjectPtr *ptr)
	Static Object retrieval method. More...

static DataObject *	find (SmartDataObjectPtr *ptr)
	Static Object find method. More...

static DataObject *	update (SmartDataObjectPtr *ptr)
	Static Object update method. More...

Protected Member Functions inherited from SmartDataObjectPtr
StatusCode	find (IRegistry pDirectory, const std::string &path, DataObject &refpObject)
	Find the specified object from the data store. More...

StatusCode	find (const std::string &fullPath, DataObject *&refpObject)
	Find the specified object from the data store. More...

StatusCode	retrieve (IRegistry pDirectory, const std::string &path, DataObject &refpObject)
	Retrieve the specified object from the data store. More...

StatusCode	retrieve (const std::string &fullPath, DataObject *&refpObject)
	Retrieve the specified object from the data store. More...

StatusCode	update (IRegistry *pDirectory)
	Update the specified object from the data store. More...

StatusCode	update (const std::string &fullPath)
	Update the specified object from the data store. More...

Protected Attributes inherited from SmartDataStorePtr< TYPE, SmartDataObjectPtr::ObjectLoader >
TYPE *	m_pObject
	Pointer to data store object. More...

Protected Attributes inherited from SmartDataObjectPtr
IDataProviderSvc *	m_dataProvider = nullptr
	Pointer to contained object. More...

IRegistry *	m_pRegistry = nullptr
	Pointer to the data registry containing the object. More...

StatusCode	m_status = {StatusCode::SUCCESS, true}
	Keep track of the last error. More...

std::string	m_path
	Path to object. More...

AccessFunction	m_accessFunc
	Data access function. More...

Detailed Description

template<class TYPE>
class SmartDataLocator< TYPE >

A small class used to access easily (and efficiently) data items residing in data stores.

The class constructors take several arguments neccessary to be passed tyo the data services in order to automatically load objects in case they are not yet loaded. This is achieved through a smart pointer mechanism i.e. by overloading the operator->() at dereferencing time the the object will be requested from the store.

The SmartDataLocator is meant to be "short living". It only makes sense to keep an object instance within e.g. the scope of one method. "long living" instances do not make sense and in the contrary would be harmful, because the information passed during construction to would be invalid and returned object pointers would actually point to hyperspace.

The intrinsic functionality, wether the object will be retrieved or loaded from the data store is defined by the LOADER::.

Base Class: SmartDataStorePtr

Author: M.Frank

Version: 1.0

Definition at line 46 of file SmartDataLocator.h.

Constructor & Destructor Documentation

template<class TYPE >

SmartDataLocator< TYPE >::SmartDataLocator	(	IDataProviderSvc *	pService,
		const std::string &	fullPath
	)

inline

Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent.

Parameters

pService	Pointer to the data service interface which should be used to load the object.
fullPath	Full path leading to the data object.

Definition at line 57 of file SmartDataLocator.h.

       : SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>( pService, 0, fullPath )
   {
   }

template<class TYPE >

SmartDataLocator< TYPE >::SmartDataLocator	(	IDataProviderSvc *	pService,
		IRegistry *	pDirectory
	)

inline

Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its directory entry.

FASTEST ACCESS TO THE DATA STORE ***

Parameters

pService	Pointer to the data service interface which should be used to load the object.
pDirectory	Pointer to the data directory entry.

Definition at line 70 of file SmartDataLocator.h.

       : SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>( pService, pDirectory, "" )
   {
   }

template<class TYPE >

SmartDataLocator< TYPE >::SmartDataLocator	(	IDataProviderSvc *	pService,
		DataObject *	pObject,
		const std::string &	path
	)

inline

Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent.

The path is meant to address only ONE level, multiple path layers are invalid.

Parameters

pService	Pointer to the data service interface which should be used to load the object.
pObject	Pointer to the parent object.
path	Path to the data object relative to the parent object.

Definition at line 86 of file SmartDataLocator.h.

       : SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>( pService, 0, path )
   {
     if ( 0 != pObject ) {
       this->m_pDirectory = pObject->registry();
     }
   }

template<class TYPE >

SmartDataLocator< TYPE >::SmartDataLocator	(	SmartDataObjectPtr &	refObject,
		IRegistry *	pDirectory
	)

inline

Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent.

The path is meant to address only ONE level, multiple path layers are invalid.

Parameters

refObject	Smart Pointer to the parent object.
pDirectory	Pointer to the data directory entry.

Definition at line 103 of file SmartDataLocator.h.

       : SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>( refObject.service(), pDirectory, "" )
   {
   }

template<class TYPE >

SmartDataLocator< TYPE >::SmartDataLocator	(	SmartDataObjectPtr &	refObject,
		const std::string &	path
	)

inline

Standard constructor: Construct an SmartDataLocator instance which is able to connect to a DataObject instance which is identified by its parent object and the path relative to the parent.

The path is meant to address only ONE level, multiple path layers are invalid.

Parameters

refObject	Smart Pointer to the parent object.
path	Path to the data object relative to the parent object.

Definition at line 117 of file SmartDataLocator.h.

       : SmartDataStorePtr<TYPE, SmartDataObjectPtr::ObjectLoader>( refObject.service(), refObject.directory(), path )
   {
   }

template<class TYPE >

virtual SmartDataLocator< TYPE >::~SmartDataLocator ( )

inlinevirtual

Standard destructor.

Definition at line 124 of file SmartDataLocator.h.

124 {}

Member Function Documentation

template<class TYPE >

template<class OTHER >

SmartDataPtr<OTHER>& SmartDataLocator< TYPE >::operator= ( OTHER * pObj )

inline

Automatic conversion to data type.

Definition at line 128 of file SmartDataLocator.h.

   {
     this->m_pObject = dynamic_cast<TYPE*>( pObj );
     return *this;
   }

template<class TYPE >

template<class OTHER >

SmartDataPtr<OTHER>& SmartDataLocator< TYPE >::operator= ( const OTHER * pObj )

inline

Automatic conversion to data type.

Definition at line 136 of file SmartDataLocator.h.

   {
     this->m_pObject = dynamic_cast<TYPE*>( const_cast<OTHER*>( pObj ) );
     return *this;
   }

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

GaudiKernel/GaudiKernel/SmartDataLocator.h

Public Member Functions

Additional Inherited Members

Detailed Description

template<class TYPE> class SmartDataLocator< TYPE >

Constructor & Destructor Documentation

Member Function Documentation

template<class TYPE>
class SmartDataLocator< TYPE >