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

#include <GaudiKernel/SmartDataObjectPtr.h>

Inheritance diagram for SmartDataObjectPtr:

Collaboration diagram for SmartDataObjectPtr:

Classes
class	ObjectFinder
	Helper class to configure smart pointer functionality. More...

class	ObjectLoader
	Helper class to configure smart pointer functionality. More...

Public Types
typedef DataObject (	AccessFunction )(SmartDataObjectPtr *ptr)

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

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

virtual	~SmartDataObjectPtr ()
	Standard Destructor.

virtual SmartDataObjectPtr &	operator= (const SmartDataObjectPtr &copy)
	Assignment operator.

	operator IRegistry * ()
	Automatic conversion to data directory.

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

IRegistry *	directory ()
	Access to data directory.

void	setService (IDataProviderSvc *svc)
	Assign data service.

IDataProviderSvc *	service ()
	Retrieve data service.

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

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

DataObject *	retrieveObject ()
	Object retrieve method.

DataObject *	findObject ()
	Object find method.

DataObject *	updateObject ()
	Object update method.

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

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

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

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

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

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

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

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

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

Protected Attributes
IDataProviderSvc *	m_dataProvider
	Pointer to contained object.

IRegistry *	m_pRegistry
	Pointer to the data registry containing the object.

StatusCode	m_status
	Keep track of the last error.

std::string	m_path
	Path to object.

AccessFunction	m_accessFunc
	Data access function.

Detailed Description

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

The class is meant as configurable base class for real Smart pointer instances. Here mainly the access of the data store is handled. It is important to keep as less functions as possible NON-VIRTUAL in particular those, which handle the data access - they might be called very often and hence the compiler must be able to inline them.

Author: M.Frank

Version: 1.0

Definition at line 33 of file SmartDataObjectPtr.h.

Member Typedef Documentation

typedef DataObject*(* SmartDataObjectPtr::AccessFunction)(SmartDataObjectPtr *ptr)

Definition at line 35 of file SmartDataObjectPtr.h.

Constructor & Destructor Documentation

SmartDataObjectPtr::SmartDataObjectPtr	(	AccessFunction	access,
		IDataProviderSvc *	pService,
		IRegistry *	pDir,
		const std::string &	path
	)

inline

Standard constructor: Construct an SmartDataObjectPtr instance.

Parameters

svc	Pointer to the data service interface used to interact with the store.
pDir	Pointer to data directory
path	path to object relative to data directory

Definition at line 55 of file SmartDataObjectPtr.h.

    : m_dataProvider(pService),
      m_pRegistry(pDir),
      m_status(StatusCode::SUCCESS,true),
      m_path(path),
      m_accessFunc(access)
  {
  }

SmartDataObjectPtr::SmartDataObjectPtr ( const SmartDataObjectPtr & copy )

inline

Copy constructor: Construct an copy of a SmartDataStorePtr instance.

Parameters

copy	Copy of Smart Pointer to object.

Definition at line 66 of file SmartDataObjectPtr.h.

    : m_dataProvider(copy.m_dataProvider),
      m_pRegistry(copy.m_pRegistry),
      m_status(copy.m_status),
      m_path(copy.m_path),
      m_accessFunc(copy.m_accessFunc)
  {
  }

virtual SmartDataObjectPtr::~SmartDataObjectPtr ( )

inlinevirtual

Standard Destructor.

Definition at line 75 of file SmartDataObjectPtr.h.

{

}

Member Function Documentation

DataObject* SmartDataObjectPtr::accessData ( )

inline

Static Object retrieval method: must call specific function.

Definition at line 111 of file SmartDataObjectPtr.h.

                              {
    return m_accessFunc(this);
  }

IRegistry* SmartDataObjectPtr::directory ( )

inline

Access to data directory.

Definition at line 91 of file SmartDataObjectPtr.h.

                            {
    return m_pRegistry;
  }

static DataObject* SmartDataObjectPtr::find ( SmartDataObjectPtr * ptr )

inlinestatic

Static Object find method.

Definition at line 121 of file SmartDataObjectPtr.h.

                                                     {
    return ptr->findObject();
  }

StatusCode SmartDataObjectPtr::find	(	IRegistry *	pDirectory,
		const std::string &	path,
		DataObject *&	refpObject
	)

protected

Find the specified object from the data store.

Retrieve the object from the data store.

Parameters

pDirectory	Pointer to the directory entry holding the object.
refpObject	Reference to the pointer finally holding the object

Returns: StatusCode indicating success or failure.

Definition at line 53 of file SmartDataObjectPtr.cpp.

                                                                                                            {
  StatusCode status = StatusCode::FAILURE;
  if ( 0 != m_dataProvider && 0 != pDirectory )    {
    status = m_dataProvider->findObject(pDirectory, path, refpObject);
  }
  return status;
}

StatusCode SmartDataObjectPtr::find	(	const std::string &	fullPath,
		DataObject *&	refpObject
	)

protected

Find the specified object from the data store.

Retrieve the object from the data store.

Parameters

fullPath	String containing the full path necessary to locate the object.
refpObject	Reference to the pointer finally holding the object

Returns: StatusCode indicating success or failure.

Definition at line 62 of file SmartDataObjectPtr.cpp.

                                                                                         {
  StatusCode status = StatusCode::FAILURE;
  if ( 0 != m_dataProvider )    {
    status = m_dataProvider->findObject(fullPath, refpObject);
  }
  return status;
}

DataObject * SmartDataObjectPtr::findObject ( )

Object find method.

If the object is not known to the local object, it is requested from the data service either using the full path if there is no directory information present.

Definition at line 109 of file SmartDataObjectPtr.cpp.

                                             {
  DataObject* pObj = 0;
  m_status = (0==m_pRegistry) ? find(m_path,pObj) : find(m_pRegistry,m_path,pObj);
  if ( m_status.isSuccess() )   {
    m_pRegistry = pObj->registry();
    m_path = "";
  }
  return pObj;
}

StatusCode SmartDataObjectPtr::getLastError ( ) const

inline

Access to potential errors during data accesses.

Definition at line 106 of file SmartDataObjectPtr.h.

                                      {
    return m_status;
  }

SmartDataObjectPtr::operator IRegistry * ( )

inline

Automatic conversion to data directory.

Definition at line 81 of file SmartDataObjectPtr.h.

                           {
    return m_pRegistry;
  }

SmartDataObjectPtr & SmartDataObjectPtr::operator= ( const SmartDataObjectPtr & copy )

virtual

Assignment operator.

Reimplemented in SmartDataStorePtr< TYPE, LOADER >, and SmartDataStorePtr< TYPE, SmartDataObjectPtr::ObjectLoader >.

Definition at line 27 of file SmartDataObjectPtr.cpp.

                                                                                  {
  m_path          = copy.m_path;
  m_pRegistry     = copy.m_pRegistry;
  m_dataProvider  = copy.m_dataProvider;
  return *this;
}

const std::string& SmartDataObjectPtr::path ( ) const

inline

Path name.

Definition at line 86 of file SmartDataObjectPtr.h.

                                    {
    return m_path;
  }

static DataObject* SmartDataObjectPtr::retrieve ( SmartDataObjectPtr * ptr )

inlinestatic

Static Object retrieval method.

Definition at line 116 of file SmartDataObjectPtr.h.

                                                         {
    return ptr->retrieveObject();
  }

StatusCode SmartDataObjectPtr::retrieve	(	IRegistry *	pDirectory,
		const std::string &	path,
		DataObject *&	refpObject
	)

protected

Retrieve the specified object from the data store.

Retrieve the object from the data store.

Parameters

pDirectory	Pointer to the directory entry holding the object.
refpObject	Reference to the pointer finally holding the object

Returns: StatusCode indicating success or failure.

Definition at line 35 of file SmartDataObjectPtr.cpp.

                                                                                                               {
  StatusCode status = StatusCode::FAILURE;
  if ( 0 != m_dataProvider && 0 != pRegistry )    {
    status = m_dataProvider->retrieveObject(pRegistry, path, refpObject);
  }
  return status;
}

StatusCode SmartDataObjectPtr::retrieve	(	const std::string &	fullPath,
		DataObject *&	refpObject
	)

protected

Retrieve the specified object from the data store.

Retrieve the object from the data store.

Parameters

fullPath	String containing the full path necessary to locate the object.
refpObject	Reference to the pointer finally holding the object

Returns: StatusCode indicating success or failure.

Definition at line 44 of file SmartDataObjectPtr.cpp.

                                                                                             {
  StatusCode status = StatusCode::FAILURE;
  if ( 0 != m_dataProvider )    {
    status = m_dataProvider->retrieveObject(fullPath, refpObject);
  }
  return status;
}

DataObject * SmartDataObjectPtr::retrieveObject ( )

Object retrieve method.

Object retrieval method.

If the object is not known to the local object, it is requested from the data service either using the full path if there is no directory information present.

Definition at line 94 of file SmartDataObjectPtr.cpp.

                                                 {
  DataObject* pObj = 0;
  m_status = (0==m_pRegistry) ? retrieve(m_path,pObj) : retrieve(m_pRegistry,m_path,pObj);
  if ( m_status.isSuccess() )   {
    m_pRegistry = pObj->registry();
    m_path = "";
  }
  return pObj;
}

IDataProviderSvc* SmartDataObjectPtr::service ( )

inline

Retrieve data service.

Definition at line 101 of file SmartDataObjectPtr.h.

                                 {
    return m_dataProvider;
  }

void SmartDataObjectPtr::setService ( IDataProviderSvc * svc )

inline

Assign data service.

Definition at line 96 of file SmartDataObjectPtr.h.

                                              {
    m_dataProvider = svc;
  }

static DataObject* SmartDataObjectPtr::update ( SmartDataObjectPtr * ptr )

inlinestatic

Static Object update method.

Definition at line 126 of file SmartDataObjectPtr.h.

                                                       {
    return ptr->updateObject();
  }

StatusCode SmartDataObjectPtr::update ( IRegistry * pDirectory )

protected

Update the specified object from the data store.

update the object from the data store.

Parameters

pDirectory Pointer to the directory entry holding the object.

Returns: StatusCode indicating success or failure.

Definition at line 72 of file SmartDataObjectPtr.cpp.

                                                             {
  StatusCode status = StatusCode::FAILURE;
  if ( 0 != m_dataProvider && 0 != pRegistry )    {
    status = m_dataProvider->updateObject(pRegistry);
  }
  return status;
}

StatusCode SmartDataObjectPtr::update ( const std::string & fullPath )

protected

Update the specified object from the data store.

update the object from the data store.

Parameters

fullPath String containing the full path necessary to locate the object.

Returns: StatusCode indicating success or failure.

Definition at line 81 of file SmartDataObjectPtr.cpp.

                                                                  {
  StatusCode status = StatusCode::FAILURE;
  if ( 0 != m_dataProvider )    {
    status = m_dataProvider->updateObject(fullPath);
  }
  return status;
}

DataObject * SmartDataObjectPtr::updateObject ( )

Object update method.

If the object is not known to the local object, it is requested from the data service either using the full path if there is no directory information present. Needs to be virtual to to implicit object access.

If the object is not known to the local object, it is requested from the data service either using the full path if there is no directory information present.

Definition at line 124 of file SmartDataObjectPtr.cpp.

                                               {
  DataObject* pObj = accessData();    // Have to load AND update if not present.
  if ( m_status.isSuccess() )   {
    m_status = (0 == m_pRegistry) ? update(m_path) : update(m_pRegistry);
    if ( !m_status.isSuccess() )  pObj = 0;
  }
  return pObj;
}

Member Data Documentation

AccessFunction SmartDataObjectPtr::m_accessFunc

protected

Data access function.

Definition at line 202 of file SmartDataObjectPtr.h.

IDataProviderSvc* SmartDataObjectPtr::m_dataProvider

mutableprotected

Pointer to contained object.

Definition at line 194 of file SmartDataObjectPtr.h.

std::string SmartDataObjectPtr::m_path

protected

Path to object.

Definition at line 200 of file SmartDataObjectPtr.h.

IRegistry* SmartDataObjectPtr::m_pRegistry

mutableprotected

Pointer to the data registry containing the object.

Definition at line 196 of file SmartDataObjectPtr.h.

StatusCode SmartDataObjectPtr::m_status

mutableprotected

Keep track of the last error.

Definition at line 198 of file SmartDataObjectPtr.h.

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

/afs/.cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v25r2/GaudiKernel/GaudiKernel/SmartDataObjectPtr.h
/afs/.cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v25r2/GaudiKernel/src/Lib/SmartDataObjectPtr.cpp

Gaudi Framework, version v25r2

Classes

Public Types

Public Member Functions

Static Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation