ISelectStatement Class Reference

A select statement can either contain

• a string e.g.

More...

#include <GaudiKernel/ISelectStatement.h>

Inheritance diagram for ISelectStatement:

Collaboration diagram for ISelectStatement:

List of all members.

Public Types
enum	SelectType { FUNCTION = 1<<1, STRING = 1<<2, FULL = 1<<3, OTHER = 1<<4 }
	Statement type definition. More...
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.

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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.

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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 };

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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 NTuple::Selector, and SelectStatement.

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_v23r0/GaudiKernel/GaudiKernel/ISelectStatement.h