SelectStatement Class Reference

Class of a selection statement. More...

#include <GaudiKernel/SelectStatement.h>

Inheritance diagram for SelectStatement:

Collaboration diagram for SelectStatement:

Public Member Functions
	SelectStatement (const std::string &s, long typ)
	Standard Constructor initializing select string. More...
	SelectStatement (const std::string &s)
	Standard Constructor initializing select string. More...
	SelectStatement ()
	Standard Constructor initializing function call. More...
virtual	~SelectStatement ()
	Standard Destructor. More...
long	type () const override
	Access the type of the object. More...
const std::string &	criteria () const override
	Access the selection string. More...
void	setCriteria (const std::string &crit) override
	Set the type. More...
void	setActive (bool flag=true) override
	Change activity flag. More...
bool	isActive () const override
	Check if selection is active. More...
virtual bool	operator() (void *) override
	Stupid default implementation. More...
Public Member Functions inherited from implements< ISelectStatement >
void *	i_cast (const InterfaceID &tid) const override
	Implementation of IInterface::i_cast. More...
StatusCode	queryInterface (const InterfaceID &ti, void **pp) override
	Implementation of IInterface::queryInterface. More...
std::vector< std::string >	getInterfaceNames () const override
	Implementation of IInterface::getInterfaceNames. More...
	implements ()=default
	Default constructor. More...
	implements (const implements &)
	Copy constructor (zero the reference count) More...
implements &	operator= (const implements &)
	Assignment operator (do not touch the reference count). More...
unsigned long	addRef () override
	Reference Interface instance. More...
unsigned long	release () override
	Release Interface instance. More...
unsigned long	refCount () const override
	Current reference count. More...

Protected Attributes
std::string	m_select
	Select string. More...
bool	m_isActive
	Activation flag. More...
long	m_type
	Type identifier. More...
Protected Attributes inherited from implements< ISelectStatement >
std::atomic_ulong	m_refCount
	Reference counter. More...

Additional Inherited Members
Public Types inherited from implements< ISelectStatement >
using	base_class = implements< Interfaces... >
	Typedef to this class. More...
using	extend_interfaces_base = extend_interfaces< Interfaces... >
	Typedef to the base of this class. More...
using	iids = typename extend_interfaces_base::ext_iids
Public Types inherited from extend_interfaces< Interfaces... >
using	ext_iids = typename Gaudi::interface_list_cat< typename Interfaces::ext_iids... >::type
	take union of the ext_iids of all Interfaces... More...

Detailed Description

Class of a selection statement.

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.

History: +------—+-------------------------------------------—+-----—+ | Date | Comment | Who | +------—+-------------------------------------------—+-----—+ | 21/10/99| Initial version. | MF | +------—+-------------------------------------------—+-----—+ Author: M.Frank Version: 1.0

Definition at line 44 of file SelectStatement.h.

Constructor & Destructor Documentation

SelectStatement::SelectStatement ( const std::string &  s, long  typ  )

inlineexplicit

Standard Constructor initializing select string.

Definition at line 48 of file SelectStatement.h.

: m_select( s ), m_isActive( false ), m_type( typ ) {}

SelectStatement::SelectStatement ( const std::string &  s )

inlineexplicit

Standard Constructor initializing select string.

Definition at line 50 of file SelectStatement.h.

: m_select( s ), m_isActive( false ), m_type( STRING ) {}

SelectStatement::SelectStatement ( )

inlineexplicit

Standard Constructor initializing function call.

Definition at line 52 of file SelectStatement.h.

: m_isActive( false ), m_type( FUNCTION ) {}

virtual SelectStatement::~SelectStatement ( )

inlinevirtual

Standard Destructor.

Definition at line 54 of file SelectStatement.h.

{}

Member Function Documentation

const std::string& SelectStatement::criteria ( ) const

inlineoverride

Access the selection string.

Definition at line 58 of file SelectStatement.h.

{ return m_select; }

bool SelectStatement::isActive ( ) const

inlineoverride

Check if selection is active.

Definition at line 68 of file SelectStatement.h.

{ return m_isActive; }

virtual bool SelectStatement::operator() ( void *  )

inlineoverridevirtual

Stupid default implementation.

Reimplemented in NTuple::Selector.

Definition at line 70 of file SelectStatement.h.

{ return true; }

void SelectStatement::setActive ( bool  flag = true )

inlineoverride

Change activity flag.

Definition at line 66 of file SelectStatement.h.

{ m_isActive = flag; }

void SelectStatement::setCriteria ( const std::string &  crit )

inlineoverride

Set the type.

Definition at line 60 of file SelectStatement.h.

  {
    m_select = crit;
    ( m_select.length() > 0 ) ? m_type |= STRING : m_type &= ~STRING;
  }

long SelectStatement::type ( ) const

inlineoverride

Access the type of the object.

Definition at line 56 of file SelectStatement.h.

{ return m_type; }

Member Data Documentation

bool SelectStatement::m_isActive

protected

Activation flag.

Definition at line 76 of file SelectStatement.h.

std::string SelectStatement::m_select

protected

Select string.

Definition at line 74 of file SelectStatement.h.

long SelectStatement::m_type

protected

Type identifier.

Definition at line 78 of file SelectStatement.h.

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

• GaudiKernel/GaudiKernel/SelectStatement.h