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Public Member Functions | Protected Attributes | List of all members
SelectStatement Class Reference

Class of a selection statement. More...

`#include <GaudiKernel/SelectStatement.h>`

Inheritance diagram for SelectStatement:
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Collaboration diagram for SelectStatement:
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## 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
| 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...
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...
| ~implements () override=default
| Virtual destructor. 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...
Public Member Functions inherited from extend_interfaces< Interfaces...>
| ~extend_interfaces () override=default
| Virtual destructor. 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
| ) |  |
| inline explicit

Standard Constructor initializing select string.

Definition at line 47 of file SelectStatement.h.

48 : m_select(s), m_isActive(false), m_type(typ)
49 {
50 }
SelectStatement::m_isActive
bool m_isActive
Activation flag.
Definition: SelectStatement.h:93
SelectStatement::m_type
long m_type
Type identifier.
Definition: SelectStatement.h:95
SelectStatement::m_select
std::string m_select
Select string.
Definition: SelectStatement.h:91

SelectStatement::SelectStatement | ( | const std::string & | s | ) |
| inline explicit

Standard Constructor initializing select string.

Definition at line 52 of file SelectStatement.h.

53 : m_select(s),m_isActive(false), m_type(STRING)
54 {
55 }
SelectStatement::m_isActive
bool m_isActive
Activation flag.
Definition: SelectStatement.h:93
SelectStatement::m_type
long m_type
Type identifier.
Definition: SelectStatement.h:95
SelectStatement::m_select
std::string m_select
Select string.
Definition: SelectStatement.h:91

SelectStatement::SelectStatement | ( |  | ) |
| inline explicit

Standard Constructor initializing function call.

Definition at line 57 of file SelectStatement.h.

58 : m_isActive(false), m_type(FUNCTION)
59 {
60 }
SelectStatement::m_isActive
bool m_isActive
Activation flag.
Definition: SelectStatement.h:93
SelectStatement::m_type
long m_type
Type identifier.
Definition: SelectStatement.h:95

virtual SelectStatement::~SelectStatement | ( |  | ) |
| inline virtual

Standard Destructor.

Definition at line 62 of file SelectStatement.h.

62 {
63 }

## Member Function Documentation

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

Access the selection string.

Definition at line 69 of file SelectStatement.h.

69 {
70 return m_select;
71 }
SelectStatement::m_select
std::string m_select
Select string.
Definition: SelectStatement.h:91

bool SelectStatement::isActive | ( |  | ) | const
| inline

Check if selection is active.

Definition at line 82 of file SelectStatement.h.

82 {
83 return m_isActive;
84 }
SelectStatement::m_isActive
bool m_isActive
Activation flag.
Definition: SelectStatement.h:93

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

Stupid default implementation.

Reimplemented in NTuple::Selector.

Definition at line 86 of file SelectStatement.h.

86 {
87 return true;
88 }

void SelectStatement::setActive | ( | bool | flag = `true` | ) |
| inline

Change activity flag.

Definition at line 78 of file SelectStatement.h.

78 {
79 m_isActive = flag;
80 }
SelectStatement::m_isActive
bool m_isActive
Activation flag.
Definition: SelectStatement.h:93

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

Set the type.

Definition at line 73 of file SelectStatement.h.

73 {
74 m_select = crit;
75 (m_select.length() > 0) ? m_type |= STRING : m_type &= ~STRING;
76 }
std::string::length
T length(T...args)
SelectStatement::m_type
long m_type
Type identifier.
Definition: SelectStatement.h:95
SelectStatement::m_select
std::string m_select
Select string.
Definition: SelectStatement.h:91

long SelectStatement::type | ( |  | ) | const
| inline

Access the type of the object.

Definition at line 65 of file SelectStatement.h.

65 {
66 return m_type;
67 }
SelectStatement::m_type
long m_type
Type identifier.
Definition: SelectStatement.h:95

## Member Data Documentation

bool SelectStatement::m_isActive
| protected

Activation flag.

Definition at line 93 of file SelectStatement.h.

std::string SelectStatement::m_select
| protected

Select string.

Definition at line 91 of file SelectStatement.h.

long SelectStatement::m_type
| protected

Type identifier.

Definition at line 95 of file SelectStatement.h.

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

- GaudiKernel/GaudiKernel/SelectStatement.h