This class represents a named configuration parameter, e.g. More...

#include <stamped_value.h>

Inheritance diagram for isc::data::StampedValue:

Public Member Functions
	StampedValue (const std::string &name)
	Constructor creating a null value. More...

	StampedValue (const std::string &name, const ElementPtr &value)
	Constructor creating a value from the `Element`. More...

	StampedValue (const std::string &name, const std::string &value)
	Constructor creating a string value. More...

bool	amNull () const
	Checks if the value is null. More...

bool	getBoolValue () const
	Returns value as a boolean. More...

double	getDoubleValue () const
	Returns value as a real number. More...

ConstElementPtr	getElementValue () const
	Returns the value as `Element`. More...

int64_t	getIntegerValue () const
	Returns value as signed integer. More...

std::string	getName () const
	Returns value name. More...

int	getType () const
	Returns a type of the value. More...

std::string	getValue () const
	Returns value as string. More...

Public Member Functions inherited from isc::data::StampedElement
	StampedElement ()
	Constructor. More...

void	delServerTag (const std::string &server_tag)
	Deletes server tag. More...

isc::data::ElementPtr	getMetadata () const
	Returns an object representing metadata to be returned with objects from the configuration backend. More...

std::set< ServerTag >	getServerTags () const
	Returns server tags. More...

bool	hasAllServerTag () const
	Checks if the element has 'all' server tag. More...

bool	hasServerTag (const ServerTag &server_tag) const
	Checks if the element has the given server tag. More...

void	setServerTag (const std::string &server_tag)
	Adds new server tag. More...

Public Member Functions inherited from isc::data::BaseStampedElement
	BaseStampedElement ()
	Constructor. More...

uint64_t	getId () const
	Returns element's database identifier. More...

boost::posix_time::ptime	getModificationTime () const
	Returns timestamp. More...

void	setId (const uint64_t id)
	Sets element's database identifier. More...

void	setModificationTime (const boost::posix_time::ptime &timestamp)
	Sets timestamp to the explicitly provided value. More...

void	updateModificationTime ()
	Sets timestamp to the current time. More...

Static Public Member Functions
static StampedValuePtr	create (const std::string &name)
	Factory function creating a null value. More...

static StampedValuePtr	create (const std::string &name, const ElementPtr &value)
	Factory function creating a value from the `Element`. More...

static StampedValuePtr	create (const std::string &name, const std::string &value)
	Factory function creating a string value. More...

static StampedValuePtr	create (const std::string &name, const std::string &value, Element::types type)
	Factory function which attempts to convert provided string value to a given type. More...

Additional Inherited Members
Protected Attributes inherited from isc::data::BaseStampedElement
uint64_t	id_
	Database identifier of the configuration element. More...

boost::posix_time::ptime	timestamp_
	Holds timestamp value. More...

Detailed Description

This class represents a named configuration parameter, e.g.

global parameter of the DHCP server.

Global configuration elements having simple types, e.g. DHCP timers, need to be associatied with modification timestamps. This association is made by deriving from StampedElement. The values can be strings, integers, booleans or real numbers.

Because the strings are more flexible, configuration elements are always held as strings in the configuration backends. This class reflects a single value held in the database. The value can be return in its orginal type or can be returned as a string. Also the null values are allowed.

Definition at line 41 of file stamped_value.h.

Constructor & Destructor Documentation

isc::data::StampedValue::StampedValue ( const std::string & name )

Constructor creating a null value.

Parameters

name	Name of the value.

Definition at line 16 of file stamped_value.cc.

Referenced by create().

isc::data::StampedValue::StampedValue	(	const std::string &	name,
		const ElementPtr &	value
	)

Constructor creating a value from the Element.

Parameters

name	Name of the value.
value	Value encapsulated in the `Element` object.

Exceptions

BadValue	if the value is null.
TypeError	if the value is neither a string, integer, bool nor real.

Definition at line 20 of file stamped_value.cc.

isc::data::StampedValue::StampedValue	(	const std::string &	name,
		const std::string &	value
	)

Constructor creating a string value.

Creates stamped value from a string.

Parameters

name	Name of the value.
value	Value to be set.

Definition at line 25 of file stamped_value.cc.

Member Function Documentation

bool isc::data::StampedValue::amNull ( ) const

inline

Checks if the value is null.

Returns: true if the value is null, false otherwise.

Definition at line 135 of file stamped_value.h.

StampedValuePtr isc::data::StampedValue::create ( const std::string & name )

static

Factory function creating a null value.

Parameters

name	Name of the value.

Definition at line 31 of file stamped_value.cc.

References StampedValue().

Referenced by create().

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StampedValuePtr isc::data::StampedValue::create	(	const std::string &	name,
		const ElementPtr &	value
	)

static

Factory function creating a value from the Element.

Parameters

name	Name of the value.
value	Value encapsulated in the `Element` object.

Exceptions

BadValue	if the value is null.
TypeError	if the value is neither a string, integer, bool nor real.

Definition at line 36 of file stamped_value.cc.

References StampedValue().

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StampedValuePtr isc::data::StampedValue::create	(	const std::string &	name,
		const std::string &	value
	)

static

Factory function creating a string value.

Creates stamped value from a string.

Parameters

name	Name of the value.
value	Value to be set.

Definition at line 41 of file stamped_value.cc.

References StampedValue().

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StampedValuePtr isc::data::StampedValue::create	(	const std::string &	name,
		const std::string &	value,
		Element::types	type
	)

static

Factory function which attempts to convert provided string value to a given type.

This factory function is useful in cases when the value is read as a string from a database. The string value has to be converted to the appropriate data type. The type is also known from the database.

Parameters

name	Name of the value.
value	Value given as string to be converted.
type	Type of the value to convert to.

Definition at line 46 of file stamped_value.cc.

References isc::data::Element::boolean, create(), isc::data::Element::create(), isc::data::Element::integer, isc_throw, isc::data::Element::real, isc::data::Element::string, and isc::data::Element::typeToName().

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bool isc::data::StampedValue::getBoolValue ( ) const

Returns value as a boolean.

Returns: Stored value as a boolean.

Exceptions

TypeError if the value is not of Element::boolean type.

Definition at line 148 of file stamped_value.cc.

References isc::data::Element::boolean.

double isc::data::StampedValue::getDoubleValue ( ) const

Returns value as a real number.

Returns: Stored value as a real number.

Exceptions

TypeError if the value is not of Element::real type.

Definition at line 154 of file stamped_value.cc.

References isc::data::Element::real.

ConstElementPtr isc::data::StampedValue::getElementValue ( ) const

inline

Returns the value as Element.

Definition at line 161 of file stamped_value.h.

int64_t isc::data::StampedValue::getIntegerValue ( ) const

Returns value as signed integer.

Returns: Stored value as a signed integer.

Exceptions

TypeError if the value is not of Element::integer type.

Definition at line 142 of file stamped_value.cc.

References isc::data::Element::integer.

std::string isc::data::StampedValue::getName ( ) const

inline

Returns value name.

Returns: Value name.

Definition at line 117 of file stamped_value.h.

int isc::data::StampedValue::getType ( ) const

Returns a type of the value.

Returns: Type of the value as integer. It can be compared with the Element::getType() output.

Exceptions

InvalidOperation if the value is null.

Definition at line 96 of file stamped_value.cc.

References isc_throw.

std::string isc::data::StampedValue::getValue ( ) const

Returns value as string.

It is allowed to call this function for all supported data types. They are converted to a string. For example, a real number of 1.4 will be returned as "1.4". The boolean true value will be returned as "1" etc.

Returns: Stored value as string.

Exceptions

InvalidOperation if the value is null.

Definition at line 107 of file stamped_value.cc.

References isc::data::Element::boolean, isc::data::Element::integer, isc_throw, isc::data::Element::real, and isc::data::Element::string.

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

Public Member Functions

Static Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation