Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup Class Reference

Service for looking up meta data about one or more entities as needed for loading entities from WikiPages (via Revision) or to verify an entity against page.page_latest. More...

Inheritance diagram for Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup:

Collaboration diagram for Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup:

Public Member Functions
	__construct (EntityNamespaceLookup $entityNamespaceLookup, PageTableEntityQuery $pageTableEntityConditionGenerator, EntitySource $entitySource)
	loadRevisionInformationByRevisionId (EntityId $entityId, $revisionId, $mode=LookupConstants::LATEST_FROM_MASTER)
Public Member Functions inherited from Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataAccessor
	loadRevisionInformation (array $entityIds, $mode)
	Looks up meta data for the given entityId(s) as needed to lookup the latest revision id of an entity or to load entity content from a MediaWiki revision.
	loadLatestRevisionIds (array $entityIds, $mode)
	Looks up the latest revision ID(s) for the given entityId(s).

Private Member Functions
	assertCanHandleEntityIds (array $entityIds)
	assertCanHandleEntityId (EntityId $entityId)
	selectFields ()
	Fields we need to select to load a revision.
	selectRevisionInformationById (EntityId $entityId, $revisionId, $connType)
	Selects revision information from the page and revision tables.
	selectRevisionInformationMultiple (array $entityIds, $connType)
	Selects revision information from the page and revision tables.
	selectLatestRevisionIdsMultiple (array $entityIds, $connType)
	Selects page_latest information from the page table.
	processRows (array $entityIds, array $rows)
	Takes an array of rows and returns a result where every given entity ID has some value.

Private Attributes
	$entityNamespaceLookup
	$pageTableEntityQuery
	$logger
	$entitySource

Detailed Description

Service for looking up meta data about one or more entities as needed for loading entities from WikiPages (via Revision) or to verify an entity against page.page_latest.

This lookup makes the assumption that the page title storing the entity matches the local ID part of the entity ID as this class queries against the page_title field of the page table.

Copyright

GPL-2.0-or-later

Author

Daniel Kinzler

Marius Hoch < hoo@o.nosp@m.nlin.nosp@m.e.de >

Constructor & Destructor Documentation

__construct()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::__construct	(	EntityNamespaceLookup	$entityNamespaceLookup,
		PageTableEntityQuery	$pageTableEntityConditionGenerator,
		EntitySource	$entitySource
	)

Parameters

EntityNamespaceLookup	$entityNamespaceLookup
PageTableEntityQuery	$pageTableEntityConditionGenerator
EntitySource	$entitySource

Member Function Documentation

assertCanHandleEntityId()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::assertCanHandleEntityId ( EntityId  $entityId )

private

assertCanHandleEntityIds()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::assertCanHandleEntityIds ( array  $entityIds )

private

Parameters

EntityId[]

$entityIds

Exceptions

InvalidArgumentException

When some of $entityIds cannot be handled by this lookup

loadRevisionInformationByRevisionId()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::loadRevisionInformationByRevisionId	(	EntityId	$entityId,
			$revisionId,
			$mode = LookupConstants::LATEST_FROM_MASTER
	)

Parameters

EntityId	$entityId
int	$revisionId
string	$mode	(WikiPageEntityMetaDataAccessor::LATEST_FROM_REPLICA, WikiPageEntityMetaDataAccessor::LATEST_FROM_REPLICA_WITH_FALLBACK or WikiPageEntityMetaDataAccessor::LATEST_FROM_MASTER)

Exceptions

DBQueryError
InvalidArgumentException	When $entityId does not belong the repository of this lookup

Returns

stdClass|bool

Implements Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataAccessor.

processRows()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::processRows ( array  $entityIds, array  $rows  )

private

Takes an array of rows and returns a result where every given entity ID has some value.

Parameters

EntityId[]	$entityIds
stdClass[]	$rows	indexed by entity id serialization

Returns

(stdClass|false)[] Array mapping entity ID serializations to either objects or false if an entity is not present in $res.

selectFields()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::selectFields ( )

private

Fields we need to select to load a revision.

Returns

string[]

selectLatestRevisionIdsMultiple()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::selectLatestRevisionIdsMultiple ( array  $entityIds,   $connType  )

private

Selects page_latest information from the page table.

Returns an array like entityid -> int or false (if not found).

Parameters

EntityId[]	$entityIds	The entities to query the DB for.
int	$connType	DB_REPLICA or DB_MASTER

Exceptions

DBQueryError

If the query fails.

Returns

array Array mapping entity ID serializations to either ints or false if an entity could not be found (including if the page is a redirect).

selectRevisionInformationById()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::selectRevisionInformationById ( EntityId  $entityId,   $revisionId,   $connType  )

private

Selects revision information from the page and revision tables.

Parameters

EntityId	$entityId	The entity to query the DB for.
int	$revisionId	The desired revision id
int	$connType	DB_REPLICA or DB_MASTER

Exceptions

DBQueryError

If the query fails.

Returns

stdClass|bool a raw database row object, or false if no such entity revision exists.

selectRevisionInformationMultiple()

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::selectRevisionInformationMultiple ( array  $entityIds,   $connType  )

private

Selects revision information from the page and revision tables.

Returns an array like entityid -> object or false (if not found).

Parameters

EntityId[]	$entityIds	The entities to query the DB for.
int	$connType	DB_REPLICA or DB_MASTER

Exceptions

DBQueryError

If the query fails.

Returns

(stdClass|false)[] Array mapping entity ID serializations to either objects or false if an entity could not be found.

Member Data Documentation

$entityNamespaceLookup

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::$entityNamespaceLookup

private

$entitySource

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::$entitySource

private

$logger

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::$logger

private

$pageTableEntityQuery

Wikibase\Lib\Store\Sql\WikiPageEntityMetaDataLookup::$pageTableEntityQuery

private

---

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

• lib/includes/Store/Sql/WikiPageEntityMetaDataLookup.php