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...

using	iid = Gaudi::InterfaceId< IInterface, 0, 0 >
	Interface ID. More...

using	ext_iids = Gaudi::interface_list< iid >
	Extra interfaces. More...

Public Member Functions
	DeclareInterfaceID (ISelectStatement, 2, 0)
	InterfaceID. More...

virtual long	type () const =0
	Access the type of the object. More...

virtual const std::string &	criteria () const =0
	Access the selection string. More...

virtual void	setCriteria (const std::string &crit)=0
	Set the type. More...

virtual void	setActive (bool flag=true)=0
	Change activity flag. More...

virtual bool	isActive () const =0
	Check if selection is active. More...

virtual bool	operator() (void *val)=0
	Stupid default implementation. More...

Public Member Functions inherited from IInterface
virtual void *	i_cast (const InterfaceID &) const =0
	main cast function More...

virtual std::vector< std::string >	getInterfaceNames () const =0
	Returns a vector of strings containing the names of all the implemented interfaces. More...

virtual unsigned long	addRef ()=0
	Increment the reference count of Interface instance. More...

virtual unsigned long	release ()=0
	Release Interface instance. More...

virtual unsigned long	refCount () const =0
	Current reference count. More...

virtual StatusCode	queryInterface (const InterfaceID &ti, void **pp)=0
	Set the void** to the pointer to the requested interface of the instance. More...

virtual	~IInterface ()=default
	Virtual destructor. More...

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

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.