tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE > Class Template Reference

On-memory secondary index implementation with std::map for generic types. More...

#include <tkrzw_index.h>

Classes
class	Iterator
	Iterator for each record. More...

Public Member Functions
	StdIndex ()
	Default constructor. More...
	~StdIndex ()
	Destructor. More...
	StdIndex (const StdIndex &rhs)=delete
	Copy and assignment are disabled. More...
StdIndex &	operator= (const StdIndex &rhs)=delete
bool	Check (const KEYTYPE &key, const VALUETYPE &value)
	Checks whether a record exists in the index. More...
std::vector< VALUETYPE >	GetValues (const KEYTYPE &key, size_t max=0)
	Gets all values of records of a key. More...
void	Add (const KEYTYPE &key, const VALUETYPE &value)
	Adds a record. More...
void	Remove (const KEYTYPE &key, const VALUETYPE &value)
	Removes a record. More...
size_t	Count ()
	Gets the number of records. More...
void	Clear ()
	Removes all records. More...
std::unique_ptr< Iterator >	MakeIterator ()
	Makes an iterator for each record. More...

Detailed Description

template<typename KEYTYPE, typename VALUETYPE, typename CMPTYPE = std::less<std::pair<KEYTYPE, VALUETYPE>>>
class tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >

On-memory secondary index implementation with std::map for generic types.

Parameters

KEYTYPE	the key type.
VALUETYPE	the value type.
CMPTYPE	the comparator type.

All operations are thread-safe; Multiple threads can access the same database concurrently.

Constructor & Destructor Documentation

StdIndex() [1/2]

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE = std::less<std::pair<KEYTYPE, VALUETYPE>>>

tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::StdIndex

(

)

Default constructor.

~StdIndex()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::~StdIndex

Destructor.

StdIndex() [2/2]

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE = std::less<std::pair<KEYTYPE, VALUETYPE>>>

tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::StdIndex ( const StdIndex< KEYTYPE, VALUETYPE, CMPTYPE > &  rhs )

explicitdelete

Copy and assignment are disabled.

Member Function Documentation

Check()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

bool tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::Check	(	const KEYTYPE &	key,
		const VALUETYPE &	value
	)

Checks whether a record exists in the index.

Parameters

key	The key of the record.
value	The value of the record.

GetValues()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

std::vector< VALUETYPE > tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::GetValues	(	const KEYTYPE &	key,
		size_t	max = 0
	)

Gets all values of records of a key.

Parameters

key	The key to look for.
max	The maximum number of values to get. 0 means unlimited.

Returns

All values of the key.

Add()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

void tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::Add	(	const KEYTYPE &	key,
		const VALUETYPE &	value
	)

Adds a record.

Parameters

key	The key of the record. This can be an arbitrary expression to search the index.
value	The value of the record. This should be a primary value of another database.

Remove()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

void tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::Remove	(	const KEYTYPE &	key,
		const VALUETYPE &	value
	)

Removes a record.

Parameters

key	The key of the record.
value	The value of the record.

Count()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

size_t tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::Count

Gets the number of records.

Returns

The number of records.

Clear()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

void tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::Clear

Removes all records.

MakeIterator()

template<typename KEYTYPE , typename VALUETYPE , typename CMPTYPE >

std::unique_ptr< typename StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::Iterator > tkrzw::StdIndex< KEYTYPE, VALUETYPE, CMPTYPE >::MakeIterator

Makes an iterator for each record.

Returns

The iterator for each record.