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ISelectStatement Class Reference

A select statement can either contain - a string e.g. More...

#include <GaudiKernel/ISelectStatement.h>

Inheritance diagram for ISelectStatement:

List of all members.

Public Types
enum	SelectType { FUNCTION = 1<<1, STRING = 1<<2 }
	Statement type definition. More...
Public Methods
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.
Static Public Methods
const InterfaceID&	interfaceID ()
	Retrieve interface ID. More...

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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(s):

M.Frank

Version:

1.0

Definition at line 37 of file ISelectStatement.h.

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Member Enumeration Documentation

enum ISelectStatement::SelectType

Statement type definition. Enumeration values: FUNCTION   STRING   Definition at line 40 of file ISelectStatement.h.

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Member Function Documentation

const std::string & ISelectStatement::criteria ( ) const [pure virtual]

Access the selection string. Reimplemented in SelectStatement.

const InterfaceID & ISelectStatement::interfaceID ( ) [inline, static]

Retrieve interface ID. Reimplemented from IInterface. Definition at line 44 of file ISelectStatement.h.

bool ISelectStatement::isActive ( ) const [pure virtual]

Check if selection is active. Reimplemented in SelectStatement.

bool ISelectStatement::operator() ( void * nt ) [pure virtual]

Stupid default implementation. Reimplemented in NTuple::Selector, and SelectStatement.

void ISelectStatement::setActive ( bool flag = true ) [pure virtual]

Change activity flag. Reimplemented in SelectStatement.

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

Set the type. Reimplemented in SelectStatement.

long ISelectStatement::type ( ) const [pure virtual]

Access the type of the object. Reimplemented in SelectStatement.

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

• ISelectStatement.h

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