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SelectStatement Class Reference

Class of a selection statement. More...

#include <SelectStatement.h>

Inheritance diagram for SelectStatement:

List of all members.

Public Methods
	SelectStatement (const std::string& s)
	Standard Constructor initializing select string. More...
	SelectStatement ()
	Standard Constructor initializing function call. More...
virtual	~SelectStatement ()
	Standard Destructor. More...
virtual unsigned long	addRef ()
	Increase reference count. More...
virtual unsigned long	release ()
	Decrease reference count (and eventually delete). More...
virtual StatusCode	queryInterface (const IID& riid, void** ppvInterface)
	Query interface. More...
long	type () const
	Access the type of the object. More...
const std::string&	criteria () const
	Access the selection string. More...
void	setCriteria (const std::string& crit)
	Set the type. More...
void	setActive (bool flag = true)
	Change activity flag. More...
bool	isActive () const
	Check if selection is active. More...
virtual bool	operator() (void* )
	Stupid default implementation. More...
Protected Attributes
std::string	m_select
	Select string. More...
long	m_refCount
	Reference counter. More...
bool	m_isActive
	Activation flag. More...
Private Attributes
long	m_type
	Type identifier. More...

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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 46 of file SelectStatement.h.

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Constructor & Destructor Documentation

SelectStatement::SelectStatement ( const std::string & s ) [inline, explicit]

Standard Constructor initializing select string. Definition at line 49 of file SelectStatement.h.

SelectStatement::SelectStatement ( ) [inline, explicit]

Standard Constructor initializing function call. Definition at line 54 of file SelectStatement.h.

SelectStatement::~SelectStatement ( ) [inline, virtual]

Standard Destructor. Definition at line 59 of file SelectStatement.h.

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Member Function Documentation

unsigned long SelectStatement::addRef ( ) [inline, virtual]

Increase reference count. Reimplemented from IInterface. Definition at line 62 of file SelectStatement.h.

const std::string & SelectStatement::criteria ( ) const [inline, virtual]

Access the selection string. Reimplemented from ISelectStatement. Definition at line 93 of file SelectStatement.h.

bool SelectStatement::isActive ( ) const [inline, virtual]

Check if selection is active. Reimplemented from ISelectStatement. Definition at line 106 of file SelectStatement.h.

bool SelectStatement::operator() ( void * nt ) [inline, virtual]

Stupid default implementation. Reimplemented from ISelectStatement. Reimplemented in NTuple::Selector. Definition at line 110 of file SelectStatement.h.

StatusCode SelectStatement::queryInterface ( const IID & riid, void ** ppvInterface ) [inline, virtual]

Query interface. Definition at line 74 of file SelectStatement.h.

unsigned long SelectStatement::release ( ) [inline, virtual]

Decrease reference count (and eventually delete). Reimplemented from IInterface. Definition at line 66 of file SelectStatement.h.

void SelectStatement::setActive ( bool flag = true ) [inline, virtual]

Change activity flag. Reimplemented from ISelectStatement. Definition at line 102 of file SelectStatement.h.

void SelectStatement::setCriteria ( const std::string & crit ) [inline, virtual]

Set the type. Reimplemented from ISelectStatement. Definition at line 97 of file SelectStatement.h.

long SelectStatement::type ( ) const [inline, virtual]

Access the type of the object. Reimplemented from ISelectStatement. Definition at line 89 of file SelectStatement.h.

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Member Data Documentation

bool SelectStatement::m_isActive [protected]

Activation flag. Definition at line 119 of file SelectStatement.h.

long SelectStatement::m_refCount [protected]

Reference counter. Definition at line 117 of file SelectStatement.h.

std::string SelectStatement::m_select [protected]

Select string. Definition at line 115 of file SelectStatement.h.

long SelectStatement::m_type [private]

Type identifier. Definition at line 122 of file SelectStatement.h.

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

• SelectStatement.h

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