In This Package:

SelectStatement Class Reference

Class of a selection statement. More...

#include <SelectStatement.h>

Inheritance diagram for SelectStatement:

[legend]Collaboration diagram for SelectStatement:[legend]List of all members.


Public Types
	FUNCTION = 1<<1
	STRING = 1<<2
	FULL = 1<<3
	OTHER = 1<<4
enum	SelectType { FUNCTION = 1<<1, STRING = 1<<2, FULL = 1<<3, OTHER = 1<<4 }
	Statement type definition. More...
	SUCCESS = 1
	Normal successful completion.
	NO_INTERFACE
	Requested interface is not available.
	VERSMISMATCH
	Requested interface version is incompatible.
	LAST_ERROR
	Last error.
enum	Status { SUCCESS = 1, NO_INTERFACE, VERSMISMATCH, LAST_ERROR }
	Return status. More...
Public Member Functions
	SelectStatement (const std::string &s, long typ)
	Standard Constructor initializing select string.
	SelectStatement (const std::string &s)
	Standard Constructor initializing select string.
	SelectStatement ()
	Standard Constructor initializing function call.
virtual	~SelectStatement ()
	Standard Destructor.
virtual unsigned long	addRef ()
	Increase reference count.
virtual unsigned long	release ()
	Decrease reference count (and eventually delete).
virtual StatusCode	queryInterface (const InterfaceID &riid, void **ppvInterface)
	Query interface.
long	type () const
	Access the type of the object.
const std::string &	criteria () const
	Access the selection string.
void	setCriteria (const std::string &crit)
	Set the type.
void	setActive (bool flag=true)
	Change activity flag.
bool	isActive () const
	Check if selection is active.
virtual bool	operator() (void *)
	Stupid default implementation.
Static Public Member Functions
static const InterfaceID &	interfaceID ()
	Retrieve interface ID.
Protected Attributes
std::string	m_select
	Select string.
long	m_refCount
	Reference counter.
bool	m_isActive
	Activation flag.
long	m_type
	Type identifier.

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.

Member Enumeration Documentation

enum ISelectStatement::SelectType [inherited]

Statement type definition.

Enumerator:

FUNCTION
STRING
FULL
OTHER

Definition at line 40 of file ISelectStatement.h.

00040 { FUNCTION=1<<1, STRING=1<<2, FULL=1<<3, OTHER=1<<4 };

enum IInterface::Status [inherited]

Return status.

Enumerator:

SUCCESS	Normal successful completion.
NO_INTERFACE	Requested interface is not available.
VERSMISMATCH	Requested interface version is incompatible.
LAST_ERROR	Last error.

Reimplemented in IConversionSvc, IConverter, and IDataProviderSvc.

Definition at line 113 of file IInterface.h.

00113                 {
00115     SUCCESS = 1,
00117     NO_INTERFACE,
00119     VERSMISMATCH,
00121     LAST_ERROR
00122   };

Constructor & Destructor Documentation

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

Standard Constructor initializing select string.

Definition at line 49 of file SelectStatement.h.

00050   : m_select(s), m_refCount(0), m_isActive(false), m_type(typ)
00051   {
00052   }

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

Standard Constructor initializing select string.

Definition at line 54 of file SelectStatement.h.

00055   : m_select(s), m_refCount(0), m_isActive(false), m_type(STRING)
00056   {
00057   }

SelectStatement::SelectStatement ( ) [inline, explicit]

Standard Constructor initializing function call.

Definition at line 59 of file SelectStatement.h.

00060   : m_refCount(0), m_isActive(false), m_type(FUNCTION)
00061   {
00062   }

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

Standard Destructor.

Definition at line 64 of file SelectStatement.h.

00064                               {
00065   }

Member Function Documentation

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

Increase reference count.

Implements IInterface.

Definition at line 67 of file SelectStatement.h.

00067                                     {
00068     return ++m_refCount;
00069   }

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

Decrease reference count (and eventually delete).

Implements IInterface.

Definition at line 71 of file SelectStatement.h.

00071                                       {
00072     long cnt = --m_refCount;
00073     if ( cnt <= 0 )   {
00074       delete this;
00075     }
00076     return cnt;
00077   }

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

Query interface.

Implements IInterface.

Definition at line 79 of file SelectStatement.h.

00079                                                                                      {
00080     if ( riid == IID_IInterface )   {
00081       *ppvInterface = (IInterface*)this;
00082     }
00083     if ( riid == IID_ISelectStatement )   {
00084       *ppvInterface = (ISelectStatement*)this;
00085     }
00086     else    {
00087       *ppvInterface = 0;
00088       return NO_INTERFACE;
00089     }
00090     addRef();
00091     return StatusCode::SUCCESS;
00092   }

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

Access the type of the object.

Implements ISelectStatement.

Definition at line 94 of file SelectStatement.h.

00094                         {
00095     return m_type;
00096   }

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

Access the selection string.

Implements ISelectStatement.

Definition at line 98 of file SelectStatement.h.

00098                                         {
00099     return m_select;
00100   }

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

Set the type.

Implements ISelectStatement.

Definition at line 102 of file SelectStatement.h.

00102                                              {
00103     m_select = crit;
00104     (m_select.length() > 0) ? m_type |= STRING : m_type &= ~STRING;
00105   }

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

Change activity flag.

Implements ISelectStatement.

Definition at line 107 of file SelectStatement.h.

00107                                      {
00108     m_isActive = flag;
00109   }

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

Check if selection is active.

Implements ISelectStatement.

Definition at line 111 of file SelectStatement.h.

00111                             {
00112     return m_isActive;
00113   }

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

Stupid default implementation.

Implements ISelectStatement.

Reimplemented in NTuple::Selector.

Definition at line 115 of file SelectStatement.h.

00115                                               {
00116     return true;
00117   }

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

Retrieve interface ID.

Reimplemented from IInterface.

Definition at line 44 of file ISelectStatement.h.

00044 { return IID_ISelectStatement; }

Member Data Documentation

std::string SelectStatement::m_select [protected]

Select string.

Definition at line 120 of file SelectStatement.h.

long SelectStatement::m_refCount [protected]

Reference counter.

Definition at line 122 of file SelectStatement.h.

bool SelectStatement::m_isActive [protected]

Activation flag.

Definition at line 124 of file SelectStatement.h.

long SelectStatement::m_type [protected]

Type identifier.

Definition at line 126 of file SelectStatement.h.

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

/home/dayabay/installs/trunk_2011_04_11_opt/NuWa-trunk/gaudi/GaudiKernel/GaudiKernel/SelectStatement.h

Generated on Mon Apr 11 19:57:13 2011 for GaudiKernel by 1.4.7

In This Package:

SelectStatement Class Reference

Public Types

Public Member Functions

Static Public Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation