ISelectStatement Class Reference

A select statement can either contain. More...

#include <GaudiKernel/ISelectStatement.h>

Inheritance diagram for ISelectStatement:

Collaboration diagram for ISelectStatement:

Public Types
enum	SelectType { FUNCTION =1<<1, STRING =1<<2, FULL =1<<3, OTHER =1<<4 }
	Statement type definition. More...
Public Types inherited from IInterface
enum	Status { SUCCESS = 1, NO_INTERFACE, VERSMISMATCH, LAST_ERROR }
	Return status. More...
typedef Gaudi::InterfaceId < IInterface, 0, 0 >	iid
	Interface ID.
typedef mpl::set1< iid >	ext_iids
	Extra interfaces.

Public Member Functions
	DeclareInterfaceID (ISelectStatement, 2, 0)
	InterfaceID.
virtual long	type () const =0
	Access the type of the object.
virtual const std::string &	criteria () const =0
	Access the selection string.
virtual void	setCriteria (const std::string &crit)=0
	Set the type.
virtual void	setActive (bool flag=true)=0
	Change activity flag.
virtual bool	isActive () const =0
	Check if selection is active.
virtual bool	operator() (void *val)=0
	Stupid default implementation.
Public Member Functions inherited from IInterface
virtual void *	i_cast (const InterfaceID &) const =0
	main cast function
virtual std::vector< std::string >	getInterfaceNames () const =0
	Returns a vector of strings containing the names of all the implemented interfaces.
virtual unsigned long	addRef ()=0
	Increment the reference count of Interface instance.
virtual unsigned long	release ()=0
	Release Interface instance.
virtual unsigned long	refCount () const =0
	Current reference count.
virtual StatusCode	queryInterface (const InterfaceID &ti, void **pp)=0
	Set the void** to the pointer to the requested interface of the instance.
virtual	~IInterface ()
	Virtual destructor.

Additional Inherited Members
Static Public Member Functions inherited from IInterface
static const InterfaceID &	interfaceID ()
	Return an instance of InterfaceID identifying the interface.

Detailed Description

A select statement can either contain.

• a string e.g. for refining an SQL statement
• a function object, which will be called back in order to refine a selection. This happens in calling sequences like the following:

bool MySelect::operator()(IValueLocator* l) { float px, py, pz; if ( l->get("PX",px) && l->get("PY",py) && l->get("PZ",pz) ) { float mom = sqrt(px*px+py*py+pz*pz); return mom > 100.0 * GeV; } return false; }

if "true" is returned, the object will be loaded completely.

Author

M.Frank

Version

1.0

Definition at line 33 of file ISelectStatement.h.

Member Enumeration Documentation

enum ISelectStatement::SelectType

Statement type definition.

Enumerator:

FUNCTION
STRING
FULL
OTHER

Definition at line 39 of file ISelectStatement.h.

{ FUNCTION=1<<1, STRING=1<<2, FULL=1<<3, OTHER=1<<4 };

Member Function Documentation

virtual const std::string& ISelectStatement::criteria ( ) const

pure virtual

Access the selection string.

Implemented in SelectStatement.

ISelectStatement::DeclareInterfaceID	(	ISelectStatement	,
		2	,
		0
	)

InterfaceID.

virtual bool ISelectStatement::isActive ( ) const

pure virtual

Check if selection is active.

Implemented in SelectStatement.

virtual bool ISelectStatement::operator() ( void *  val )

pure virtual

Stupid default implementation.

Implemented in SelectStatement, and NTuple::Selector.

virtual void ISelectStatement::setActive ( bool  flag = true )

pure virtual

Change activity flag.

Implemented in SelectStatement.

virtual void ISelectStatement::setCriteria ( const std::string &  crit )

pure virtual

Set the type.

Implemented in SelectStatement.

virtual long ISelectStatement::type ( ) const

pure virtual

Access the type of the object.

Implemented in SelectStatement.

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

• /afs/cern.ch/sw/Gaudi/releases/GAUDI/GAUDI_v25r0/GaudiKernel/GaudiKernel/ISelectStatement.h