Optional DBObjPtr: This class behaves the same as the DBObjPtr except that it will not raise errors when an object could not be found in the database. More...

#include <DBObjPtr.h>

Inheritance diagram for OptionalDBObjPtr< T >:

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Collaboration diagram for OptionalDBObjPtr< T >:

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Public Member Functions
	OptionalDBObjPtr (const std::string &name="")
	Construct a new Array with a given name or with the default name which is identical to the class name of T.

const T &	operator* () const
	Imitate pointer functionality.

const T *	operator-> () const
	Imitate pointer functionality.

const std::string &	getName () const
	Return name under which the object is saved in the DBStore.

bool	isValid () const
	Check whether a valid object was obtained from the database. More...

	operator bool () const
	Imitate pointer functionality.

virtual bool	operator== (const DBAccessorBase &other) const
	Check if two store accessors point to the same object/array.

virtual bool	operator!= (const DBAccessorBase &other) const
	Check if two store accessors point to a different object/array.

bool	hasChanged ()
	Check whether the object has changed since the last call to hasChanged of the accessor).

void	addCallback (std::function< void(const std::string &)> callback, bool onDestruction=false)
	Add a callback method. More...

void	addCallback (std::function< void()> callback, bool onDestruction=false)
	Add a callback method. More...

template<class T >
void	addCallback (T object, void(T::callback)())
	Add a callback method of an object. More...

const std::string &	getGlobaltag () const
	Return the globaltag name (or testing payloads path) this object is loaded from.

unsigned int	getRevision () const
	Return current revision of the object.

IntervalOfValidity	getIoV () const
	Return current IoV of the object.

const std::string &	getChecksum () const
	Get current checksum.

const std::string &	getFilename () const
	Get the filename this object is loaded from.

bool	isIntraRunDependent () const
	Check wether this conditions object has some intra-run dependencies.

const std::vector< unsigned int >	getIntraRunBoundaries () const
	Get the intra-run boundaries, if any. More...

bool	isRequired () const
	Check whether this conditions object is required (at least one user declared it as required)

Protected Member Functions
template<class T = TObject>
const T *	getObject () const
	Return a pointer to the Object already cast to the correct type.

bool	ensureAttached () const
	Make sure we are attached to the the DBStore. More...

void	storeEntryChanged (bool destructed)
	Callback function which gets called by the DBStoreEntry object if it changes.

Protected Attributes
const DBStoreEntry::EPayloadType	m_type
	Type of the payload.

const std::string	m_name
	Name of the payload in the database.

const TClass *	m_objClass
	Class of the payload if type is c_Object.

const bool	m_isArray
	True if the payload is an array of objects.

const bool	m_isRequired
	True if the payload is required, otherwise no errors will be raised if it cannot be found.

DBStoreEntry *	m_entry
	Pointer to the entry in the DBStore.

bool	m_changed {false}
	Internal flag whether the object has changed since we last checked.

std::vector< std::pair< std::function< void(const std::string &)>, bool > >	m_callbacks
	List of all registered callback functions.

Detailed Description

template<class T>
class Belle2::OptionalDBObjPtr< T >

Optional DBObjPtr: This class behaves the same as the DBObjPtr except that it will not raise errors when an object could not be found in the database.

Users are responsible to check the validity of the object before using it.

This is the same as using a DBObjPtr with full constructor arguments to specify whether it is optional but allows to use default constructor and gives a clearer intention to readers.

Definition at line 48 of file DBObjPtr.h.

Member Function Documentation

◆ addCallback() [1/3]

void addCallback	(	std::function< void()>	callback,
		bool	onDestruction = `false`
	)

inlineinherited

Add a callback method.

The given method will be called whenever there is a new database entry for this DBAccessor.

Parameters

callback	function pointer to a callback function
onDestruction	if true the callback will not be called for each change but only when the Database entry is deleted and can be used to remove dangling pointers to the entry.

Definition at line 118 of file DBAccessorBase.h.

◆ addCallback() [2/3]

void addCallback	(	std::function< void(const std::string &)>	callback,
		bool	onDestruction = `false`
	)

inlineinherited

Add a callback method.

The given method will be called whenever there is a new database entry for this DBAccessor. The one parameter is the name of the DB entry which changed (in case the same callback method is to be used for multiple payloads.

Parameters

callback	function pointer to a callback function
onDestruction	if true the callback will not be called for each change but only when the Database entry is deleted and can be used to remove dangling pointers to the entry.

Definition at line 105 of file DBAccessorBase.h.

◆ addCallback() [3/3]

void addCallback	(	T *	object,
		void(T::*)()	callback
	)

inlineinherited

Add a callback method of an object.

The given method will be called whenever there is a new database entry for this DBAccessor.

Parameters

object	The object with the callback method.
callback	The callback method.

Definition at line 130 of file DBAccessorBase.h.

◆ ensureAttached()

bool ensureAttached ( ) const

inlineprotectedinherited

Make sure we are attached to the the DBStore.

If not try to reconnect

Definition at line 171 of file DBAccessorBase.h.

◆ getIntraRunBoundaries()

const std::vector<unsigned int> getIntraRunBoundaries ( ) const

inlineinherited

Get the intra-run boundaries, if any.

If the intra-run dependency is by event number, the event numbers used as boundaries are returned.

Definition at line 157 of file DBAccessorBase.h.

◆ isValid()

bool isValid ( ) const

inlineinherited

Check whether a valid object was obtained from the database.

Returns: True if the object exists.

Definition at line 72 of file DBAccessorBase.h.

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

framework/database/include/DBObjPtr.h

Public Member Functions

Protected Member Functions

Protected Attributes

Detailed Description

template<class T> class Belle2::OptionalDBObjPtr< T >

Member Function Documentation

◆ addCallback() [1/3]

◆ addCallback() [2/3]

◆ addCallback() [3/3]

◆ ensureAttached()

◆ getIntraRunBoundaries()

◆ isValid()

template<class T>
class Belle2::OptionalDBObjPtr< T >