DataStatusMask Struct Reference

This struct encodes criteria for CompositeData::DataStatus so that Read and Write operations can be done for specific types of data (ie. required and unqueried or only existing data). It is used by OperateOnSpecifiedData at run-time. More...

#include <DataStatusMask.hh>

Public Types
enum	Condition { MUST = 0, MUST_NOT, EITHER }
	Specify a condition as MUST be true, MUST_NOT be true, or EITHER. More...

Public Member Functions
	DataStatusMask (const Condition _e=EITHER, const Condition _q=EITHER, const Condition _r=EITHER)
	Default constructor. Everything is set to EITHER so that nothing is masked. More...
bool	Satisfied (const CompositeData::DataStatus &_status) const
	Test whether all conditions of this DataStatusMask are satisfied by the DataStatus. More...

Static Public Member Functions
static bool	ConditionSatisfied (const DataStatusMask::Condition _condition, const bool _value)
	Test whether a single condition is satisfied: More...

Public Attributes
Condition	exist
	MUST means the type must exist in the CompositeData in order to be operated on. MUST_NOT means it must not exist (this can be used to decide whether to create the object). More...
Condition	queried
	MUST means the type must be queried. MUST_NOT means it must not be queried. More...
Condition	required
	MUST means the type must be required by the CompositeData. MUST_NOT means it must not be required. More...

Detailed Description

This struct encodes criteria for CompositeData::DataStatus so that Read and Write operations can be done for specific types of data (ie. required and unqueried or only existing data). It is used by OperateOnSpecifiedData at run-time.

See also

CompositeData::DataStatus

OperateOnSpecifiedData

Member Enumeration Documentation

Condition

enum Condition

Specify a condition as MUST be true, MUST_NOT be true, or EITHER.

Enumerator
MUST	MUST be true.
MUST_NOT	MUST_NOT be true (ie. must be false)
EITHER	EITHER true or false.

Constructor & Destructor Documentation

DataStatusMask()

DataStatusMask	(	const Condition	_e = EITHER,
		const Condition	_q = EITHER,
		const Condition	_r = EITHER
	)

Default constructor. Everything is set to EITHER so that nothing is masked.

Parameters

[in]	_e	Exist condition.
[in]	_q	Queried condition.
[in]	_r	Required condition.

Member Function Documentation

ConditionSatisfied()

static bool ConditionSatisfied ( const DataStatusMask::Condition  _condition, const bool  _value  )

static

Test whether a single condition is satisfied:

• true if _condition == EITHER
• true if _condition == MUST and boolean _value == true
• true if _condition == MUST_NOT and boolean _value == false
• false otherwise

  Parameters

  [in]	_condition	Condition requirement for variable check.
  [in]	_value	Boolean value to check.

  Returns

  True if condition is satisfied, otherwise false.

Satisfied()

bool Satisfied

(

const CompositeData::DataStatus &

_status

)

const

Test whether all conditions of this DataStatusMask are satisfied by the DataStatus.

Parameters

[in]

_status

DataStatus to evaluate.

Returns

True if _status satisfies these conditions.

Member Data Documentation

exist

Condition exist

MUST means the type must exist in the CompositeData in order to be operated on. MUST_NOT means it must not exist (this can be used to decide whether to create the object).

queried

Condition queried

MUST means the type must be queried. MUST_NOT means it must not be queried.

required

Condition required

MUST means the type must be required by the CompositeData. MUST_NOT means it must not be required.

Superficially, this might appear to overlap with the role of FindRequired and FindExpected, but those templates are filtering data types at compile-time whereas this will filter them during runtime. Requirements can be promoted during run-time, so they won't necessarily match the static compile-time requirements, and a user might want to dynamically choose which requirement level to operate on during run-time.

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

• DataStatusMask.hh