IEvtSelector Class Reference

The Event Selector Interface. More...

#include <GaudiKernel/IEvtSelector.h>

Inheritance diagram for IEvtSelector:

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Collaboration diagram for IEvtSelector:

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List of all members.

Public Member Functions
	DeclareInterfaceID (IEvtSelector, 2, 0)
	InterfaceID.
virtual StatusCode	createContext (Context *&c) const =0
	Create and return a context object that will keep track of the state of selection.
virtual StatusCode	next (Context &c) const =0
	Fetch the next event or the first event if it will be use soon after the creation of the context.
virtual StatusCode	next (Context &c, int jump) const =0
	Same of next(const Context&) plus the possibility to jump the next n-1 events.
virtual StatusCode	previous (Context &c) const =0
	Fetch the previous event.
virtual StatusCode	previous (Context &c, int jump) const =0
	Same of previous(Context& c) the possibility to jump the previous n-1 events.
virtual StatusCode	last (Context &refContext) const =0
	Access last item in the iteration.
virtual StatusCode	rewind (Context &c) const =0
	Will set the state of the context in a way that the next event read is the first of the list.
virtual StatusCode	createAddress (const Context &c, IOpaqueAddress *&iop) const =0
	Create an IOpaqueAddress object from the event fetched.
virtual StatusCode	releaseContext (Context *&) const =0
	Release the Context object.
virtual StatusCode	resetCriteria (const std::string &cr, Context &c) const =0
	Will set a new criteria for the selection of the next list of events and will change the state of the context in a way to point to the new list.
Classes
class	Context

---

Detailed Description

The Event Selector Interface.

The EventSelector component is able to produce a list of event given a set of stream specifications.

Author:

C. Cioffi

Date:

14/11/2003

Definition at line 19 of file IEvtSelector.h.

---

Member Function Documentation

IEvtSelector::DeclareInterfaceID	(	IEvtSelector	,
		2	,
		0
	)

InterfaceID.

virtual StatusCode IEvtSelector::createContext

(

Context *&

c

)

const [pure virtual]

Create and return a context object that will keep track of the state of selection.

Parameters:

c

Reference of a pointer to a Context object.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::next

(

Context &

c

)

const [pure virtual]

Fetch the next event or the first event if it will be use soon after the creation of the context.

It will return StatusCode::FAILURE if there have been problem in the fetching or it has been reached the end of the list of events.

Parameters:

c

Reference to the Context object.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::next	(	Context &	c,
		int	jump
	)			const [pure virtual]

Same of next(const Context&) plus the possibility to jump the next n-1 events.

Parameters:

	c	Reference to the Context object.
	jump	The event to jump to from the current event.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::previous

(

Context &

c

)

const [pure virtual]

Fetch the previous event.

It will return StatusCode::FAILURE if there have been problem in the fetching or it has been reached the begin of the list of events.

Parameters:

c

Reference to the Context object.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::previous	(	Context &	c,
		int	jump
	)			const [pure virtual]

Same of previous(Context& c) the possibility to jump the previous n-1 events.

Parameters:

	c	Reference to the Context object.
	jump	The event to jump to from the current event.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::last

(

Context &

refContext

)

const [pure virtual]

Access last item in the iteration.

Parameters:

refContext

[IN/OUT] Reference to the Context object.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::rewind

(

Context &

c

)

const [pure virtual]

Will set the state of the context in a way that the next event read is the first of the list.

Parameters:

c

Reference to the Context object.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::createAddress	(	const Context &	c,
		IOpaqueAddress *&	iop
	)			const [pure virtual]

Create an IOpaqueAddress object from the event fetched.

Parameters:

	c	Reference to the Context object.
	iop	Refernce pointer to a IOpaqueAddress object

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::releaseContext

(

Context *&

)

const [pure virtual]

Release the Context object.

Parameters:

c

Reference pointer to the Context object.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

virtual StatusCode IEvtSelector::resetCriteria	(	const std::string &	cr,
		Context &	c
	)			const [pure virtual]

Will set a new criteria for the selection of the next list of events and will change the state of the context in a way to point to the new list.

Parameters:

	cr	The new criteria string.
	c	Reference pointer to the Context object.

Implemented in PoolDbEvtSelector, EventCollectionSelector, and EventSelector.

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

• /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v21r8/GaudiKernel/GaudiKernel/IEvtSelector.h