Base handler class for Entity content classes. More...

Inheritance diagram for Wikibase\Repo\Content\EntityHandler:

Collaboration diagram for Wikibase\Repo\Content\EntityHandler:

Public Member Functions
	__construct ( $modelId, $unused, EntityContentDataCodec $contentCodec, EntityConstraintProvider $constraintProvider, ValidatorErrorLocalizer $errorLocalizer, EntityIdParser $entityIdParser, FieldDefinitions $fieldDefinitions, $legacyExportFormatDetector=null)

	getLegacyExportFormatDetector ()
	Returns the callback used to determine whether a serialized blob needs to be re-serialized on export (or null of re-serialization is disabled).

	showMissingEntity (Title $title, IContextSource $context)
	Handle the fact that a given page does not contain an Entity, even though it could.

	getOnSaveValidators ( $forCreation, EntityId $entityId)
	Get EntityValidators for on-save validation.

	getValidationErrorLocalizer ()
	Error localizer for use together with getOnSaveValidators().

	makeEmptyContent ()

	makeEmptyEntity ()
	Returns an empty Entity object of the type supported by this handler.

	makeEntityRedirectContent (EntityRedirect $redirect)

	supportsCategories ()
	None of the Entity content models support categories.

	getAutosummary (Content $oldContent=null, Content $newContent=null, $flags=0)

	makeRedirectContent (Title $title, $text='')

	exportTransform ( $blob, $format=null)

	makeEntityContent (EntityHolder $entityHolder)

	makeEntityId ( $id)
	Parses the given ID string into an EntityId for the type of entity supported by this EntityHandler.

	getDefaultFormat ()

	serializeContent (Content $content, $format=null)

	unserializeContent ( $blob, $format=null)

	getIdForTitle (Title $target)
	Returns the ID of the entity contained by the page of the given title.

	getTitleForId (EntityId $id)
	Returns the appropriate page Title for the given EntityId.

	getTitlesForIds (array $ids)
	Returns the appropriate page Titles for the given EntityIds.

	getEntityNamespace ()
	Returns the namespace that is to be used for this kind of entities.

	getEntitySlotRole ()
	Returns the slot that is to be used for this kind of entities.

	canBeUsedOn (Title $title)

	isParserCacheSupported ()
	Returns true to indicate that the parser cache can be used for data items.

	getPageViewLanguage (Title $title, Content $content=null)

	getPageLanguage (Title $title, Content $content=null)

	getSpecialPageForCreation ()
	Returns the name of the special page responsible for creating a page for this type of entity content.

	getUndoContent ( $latest, $newer, $older, $undoIsLatest=false)

	getEntityType ()
	Returns the entity type ID for the kind of entity managed by this EntityContent implementation.

	allowAutomaticIds ()
	Whether IDs can automatically be assigned to entities of the kind supported by this EntityHandler.

	canCreateWithCustomId (EntityId $id)
	Whether the given custom ID is valid for creating a new entity of the kind supported by this EntityHandler.

	getFieldsForSearchIndex (SearchEngine $engine)

	getDataForSearchIndex (WikiPage $page, ParserOutput $output, SearchEngine $engine)

Public Attributes
const	PARSER_VERSION = 3
	Added to parser options for EntityContent.

Protected Member Functions
	getDiffEngineClass ()

	newEntityContent (EntityHolder $entityHolder=null)

Protected Attributes
	$fieldDefinitions

	$contentCodec

	$constraintProvider

Private Attributes
	$errorLocalizer

	$entityIdParser

	$legacyExportFormatDetector

Detailed Description

Base handler class for Entity content classes.

Copyright: GPL-2.0-or-later

Author: Daniel Kinzler; Jeroen De Dauw < jeroe.nosp@m.nded.nosp@m.auw@g.nosp@m.mail.nosp@m..com >

Constructor & Destructor Documentation

◆ __construct()

Wikibase\Repo\Content\EntityHandler::__construct	(		$modelId,
			$unused,
		EntityContentDataCodec	$contentCodec,
		EntityConstraintProvider	$constraintProvider,
		ValidatorErrorLocalizer	$errorLocalizer,
		EntityIdParser	$entityIdParser,
		FieldDefinitions	$fieldDefinitions,
			$legacyExportFormatDetector = `null`
	)

Parameters

string	$modelId
mixed	$unused

Todo:: Get rid of me

Parameters

EntityContentDataCodec	$contentCodec
EntityConstraintProvider	$constraintProvider
ValidatorErrorLocalizer	$errorLocalizer
EntityIdParser	$entityIdParser
FieldDefinitions	$fieldDefinitions
callable \| null	$legacyExportFormatDetector	Callback to determine whether a serialized blob needs to be re-serialized on export. The callback must take two parameters, the blob an the serialization format. It must return true if re-serialization is needed. False positives are acceptable, false negatives are not.

Member Function Documentation

◆ allowAutomaticIds()

Wikibase\Repo\Content\EntityHandler::allowAutomaticIds ( )

Whether IDs can automatically be assigned to entities of the kind supported by this EntityHandler.

Returns: bool

◆ canBeUsedOn()

Wikibase\Repo\Content\EntityHandler::canBeUsedOn ( Title $title )

See also: ContentHandler::canBeUsedOn

This implementation returns true if and only if the given title's namespace is the same as the one returned by $this->getEntityNamespace().

Parameters

Title $title

Returns: bool true if $title represents a page in the appropriate entity namespace.

◆ canCreateWithCustomId()

Wikibase\Repo\Content\EntityHandler::canCreateWithCustomId ( EntityId $id )

Whether the given custom ID is valid for creating a new entity of the kind supported by this EntityHandler.

Implementations are not required to check if an entity with the given ID already exists. If this method returns true, this means that an entity with the given ID could be created (or already existed) at the time the method was called. There is no guarantee that this continues to be true after the method call returned. Callers must be careful to handle race conditions.

Note: For entity types that cannot be created with custom IDs (that is, entity types that are defined to use automatic IDs), this should always return false.

See also: EntityStore::canCreateWithCustomId()

Parameters

EntityId $id

Returns: bool

◆ exportTransform()

Wikibase\Repo\Content\EntityHandler::exportTransform	(	$blob,
		$format = `null`
	)

See also: ContentHandler::exportTransform

Parameters

string	$blob
string \| null	$format

Returns: string

◆ getAutosummary()

Wikibase\Repo\Content\EntityHandler::getAutosummary	(	Content	$oldContent = `null`,
		Content	$newContent = `null`,
			$flags = `0`
	)

See also: ContentHandler::getAutosummary

We never want to use MediaWiki's autosummaries, used e.g. for new page creation. Override this to make sure they never overwrite our autosummaries (which look like the automatic summary prefixes with a section title, and so could be overwritten).

Parameters

Content \| null	$oldContent
Content \| null	$newContent
int	$flags

Returns: string Empty string

◆ getDataForSearchIndex()

Wikibase\Repo\Content\EntityHandler::getDataForSearchIndex	(	WikiPage	$page,
		ParserOutput	$output,
		SearchEngine	$engine
	)

Parameters

WikiPage	$page
ParserOutput	$output
SearchEngine	$engine

Returns: array Wikibase fields data, map of name=>value for fields

◆ getDefaultFormat()

Wikibase\Repo\Content\EntityHandler::getDefaultFormat ( )

Returns: string

◆ getDiffEngineClass()

Wikibase\Repo\Content\EntityHandler::getDiffEngineClass ( )

protected

See also: ContentHandler::getDiffEngineClass

Returns: string

◆ getEntityNamespace()

Wikibase\Repo\Content\EntityHandler::getEntityNamespace ( )

final

Returns the namespace that is to be used for this kind of entities.

Returns: int

◆ getEntitySlotRole()

Wikibase\Repo\Content\EntityHandler::getEntitySlotRole ( )

final

Returns the slot that is to be used for this kind of entities.

Returns: string the role name of the slot

◆ getEntityType()

Wikibase\Repo\Content\EntityHandler::getEntityType ( )

abstract

Returns the entity type ID for the kind of entity managed by this EntityContent implementation.

Returns: string

Reimplemented in Wikibase\Repo\Content\ItemHandler, and Wikibase\Repo\Content\PropertyHandler.

◆ getFieldsForSearchIndex()

Wikibase\Repo\Content\EntityHandler::getFieldsForSearchIndex ( SearchEngine $engine )

Parameters

SearchEngine $engine

Returns: \SearchIndexField[] List of fields this content handler can provide.

◆ getIdForTitle()

Wikibase\Repo\Content\EntityHandler::getIdForTitle ( Title $target )

Returns the ID of the entity contained by the page of the given title.

Warning: This should not really be needed and may just go away!

Parameters

Title $target

Exceptions

EntityIdParsingException

Returns: EntityId

◆ getLegacyExportFormatDetector()

Wikibase\Repo\Content\EntityHandler::getLegacyExportFormatDetector ( )

Returns the callback used to determine whether a serialized blob needs to be re-serialized on export (or null of re-serialization is disabled).

Returns: callable|null

◆ getOnSaveValidators()

Wikibase\Repo\Content\EntityHandler::getOnSaveValidators	(		$forCreation,
		EntityId	$entityId
	)

Get EntityValidators for on-save validation.

See also: getValidationErrorLocalizer()

Parameters

bool $forCreation Whether the entity is created (true) or updated (false).

Returns: EntityValidator[]

◆ getPageLanguage()

Wikibase\Repo\Content\EntityHandler::getPageLanguage	(	Title	$title,
		Content	$content = `null`
	)

See also: ContentHandler::getPageLanguage

This implementation unconditionally returns the wiki's content language. The PageContentLanguage hook is bypassed.

Note: Ideally, this would return 'mul' to indicate multilingual content. But MediaWiki currently doesn't support that.; in several places in mediawiki, most importantly the parser cache, getPageLanguage is used in places where getPageViewLanguage would be more appropriate.

Parameters

Title	$title	the page to determine the language for.
Content \| null	$content	the page's content, if you have it handy, to avoid reloading it.

Returns: Language The page's language

◆ getPageViewLanguage()

Wikibase\Repo\Content\EntityHandler::getPageViewLanguage	(	Title	$title,
		Content	$content = `null`
	)

See also: ContentHandler::getPageViewLanguage

This implementation returns the user language, because entities get rendered in the user's language. The PageContentLanguage hook is bypassed.

Parameters

Title	$title	the page to determine the language for.
Content \| null	$content	the page's content, if you have it handy, to avoid reloading it.

Returns: Language The page's language

◆ getSpecialPageForCreation()

Wikibase\Repo\Content\EntityHandler::getSpecialPageForCreation ( )

Returns the name of the special page responsible for creating a page for this type of entity content.

Returns null if there is no such special page.

Returns: string|null Always null in this default implementation.

Reimplemented in Wikibase\Repo\Content\ItemHandler, and Wikibase\Repo\Content\PropertyHandler.

◆ getTitleForId()

Wikibase\Repo\Content\EntityHandler::getTitleForId ( EntityId $id )

Returns the appropriate page Title for the given EntityId.

Warning: This should not really be needed and may just go away!

See also: EntityTitleStoreLookup::getTitleForId

Parameters

EntityId $id

Exceptions

InvalidArgumentException if $id refers to an entity of the wrong type.

Returns: Title

◆ getTitlesForIds()

Wikibase\Repo\Content\EntityHandler::getTitlesForIds ( array $ids )

Returns the appropriate page Titles for the given EntityIds.

Parameters

EntityId[] $ids

Returns: Title[] Array of Title objects indexed by the entity id serializations

◆ getUndoContent()

Wikibase\Repo\Content\EntityHandler::getUndoContent	(	$latest,
		$newer,
		$older,
		$undoIsLatest = `false`
	)

See also: ContentHandler::getUndoContent

Parameters

Revision \| Content	$latest	The current text
Revision \| Content	$newer	The revision to undo
Revision \| Content	$older	Must be an earlier revision than $newer
bool	$undoIsLatest	Set to true if $newer is from the current revision (since 1.32)

Returns: EntityContent|bool Content on success, false on failure

◆ getValidationErrorLocalizer()

Wikibase\Repo\Content\EntityHandler::getValidationErrorLocalizer ( )

Error localizer for use together with getOnSaveValidators().

See also: getOnSaveValidators()

Returns: ValidatorErrorLocalizer

◆ isParserCacheSupported()

Wikibase\Repo\Content\EntityHandler::isParserCacheSupported ( )

Returns true to indicate that the parser cache can be used for data items.

Note: The html representation of entities depends on the user language, so EntityContent::getParserOutput needs to make sure ParserOutput::recordOption( 'userlang' ) is called to split the cache by user language.

See also: ContentHandler::isParserCacheSupported

Returns: bool Always true in this default implementation.

◆ makeEmptyContent()

Wikibase\Repo\Content\EntityHandler::makeEmptyContent ( )

See also: ContentHandler::makeEmptyContent

Returns: EntityContent

◆ makeEmptyEntity()

Wikibase\Repo\Content\EntityHandler::makeEmptyEntity ( )

abstract

Returns an empty Entity object of the type supported by this handler.

This is intended to provide a baseline for diffing and related operations.

Note: The Entity returned here will not have an ID set, and is thus not suitable for use in an EntityContent object.

Returns: EntityDocument

Reimplemented in Wikibase\Repo\Content\ItemHandler, and Wikibase\Repo\Content\PropertyHandler.

◆ makeEntityContent()

Wikibase\Repo\Content\EntityHandler::makeEntityContent ( EntityHolder $entityHolder )

Parameters

EntityHolder $entityHolder

Returns: EntityContent

◆ makeEntityId()

Wikibase\Repo\Content\EntityHandler::makeEntityId ( $id )

abstract

Parses the given ID string into an EntityId for the type of entity supported by this EntityHandler.

If the string is not a valid serialization of the correct type of entity ID, an exception is thrown.

Parameters

string $id String representation the entity ID

Returns: EntityId

Exceptions

InvalidArgumentException

Reimplemented in Wikibase\Repo\Content\ItemHandler, and Wikibase\Repo\Content\PropertyHandler.

◆ makeEntityRedirectContent()

Wikibase\Repo\Content\EntityHandler::makeEntityRedirectContent ( EntityRedirect $redirect )

Parameters

EntityRedirect $redirect Unused in this default implementation.

Returns: EntityContent|null Either a new EntityContent representing the given EntityRedirect, or null if the entity type does not support redirects. Always null in this default implementation.

Reimplemented in Wikibase\Repo\Content\ItemHandler.

◆ makeRedirectContent()

Wikibase\Repo\Content\EntityHandler::makeRedirectContent	(	Title	$title,
			$text = `''`
	)

See also: ContentHandler::makeRedirectContent

Warning: Always throws an MWException, since an EntityRedirects needs to know it's own ID in addition to the target ID. We have no way to guess that in makeRedirectContent(). Use makeEntityRedirectContent() instead.

See also: makeEntityRedirectContent()

Parameters

Title	$title
string	$text

Exceptions

MWException Always.

Returns: EntityContent|null

◆ newEntityContent()

Wikibase\Repo\Content\EntityHandler::newEntityContent ( EntityHolder $entityHolder = null )

abstractprotected

Parameters

EntityHolder | null $entityHolder

Returns: EntityContent

Reimplemented in Wikibase\Repo\Content\ItemHandler, and Wikibase\Repo\Content\PropertyHandler.

◆ serializeContent()

Wikibase\Repo\Content\EntityHandler::serializeContent	(	Content	$content,
			$format = `null`
	)

Parameters

Content	$content
string \| null	$format

Exceptions

InvalidArgumentException
MWContentSerializationException

Returns: string

◆ showMissingEntity()

Wikibase\Repo\Content\EntityHandler::showMissingEntity	(	Title	$title,
		IContextSource	$context
	)

Handle the fact that a given page does not contain an Entity, even though it could.

Per default, this behaves similarly to Article::showMissingArticle: it shows a message to the user.

See also: Article::showMissingArticle

Parameters

Title	$title	The title of the page that potentially could, but does not, contain an entity.
IContextSource	$context	Context to use for reporting. In particular, output will be written to $context->getOutput().

◆ supportsCategories()

Wikibase\Repo\Content\EntityHandler::supportsCategories ( )

None of the Entity content models support categories.

Returns: bool Always false.

◆ unserializeContent()

Wikibase\Repo\Content\EntityHandler::unserializeContent	(	$blob,
		$format = `null`
	)

See also: ContentHandler::unserializeContent

Parameters

string	$blob
string \| null	$format

Exceptions

MWContentSerializationException

Returns: EntityContent

Member Data Documentation

◆ $constraintProvider

Wikibase\Repo\Content\EntityHandler::$constraintProvider

protected

◆ $contentCodec

Wikibase\Repo\Content\EntityHandler::$contentCodec

protected

◆ $entityIdParser

Wikibase\Repo\Content\EntityHandler::$entityIdParser

private

◆ $errorLocalizer

Wikibase\Repo\Content\EntityHandler::$errorLocalizer

private

◆ $fieldDefinitions

Wikibase\Repo\Content\EntityHandler::$fieldDefinitions

protected

◆ $legacyExportFormatDetector

Wikibase\Repo\Content\EntityHandler::$legacyExportFormatDetector

private

◆ PARSER_VERSION

const Wikibase\Repo\Content\EntityHandler::PARSER_VERSION = 3

Added to parser options for EntityContent.

Bump the version when making incompatible changes to parser output.

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

repo/includes/Content/EntityHandler.php

Public Member Functions

Public Attributes

Protected Member Functions

Protected Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

Member Function Documentation

◆ allowAutomaticIds()

◆ canBeUsedOn()

◆ canCreateWithCustomId()

◆ exportTransform()

◆ getAutosummary()

◆ getDataForSearchIndex()

◆ getDefaultFormat()

◆ getDiffEngineClass()

◆ getEntityNamespace()

◆ getEntitySlotRole()

◆ getEntityType()

◆ getFieldsForSearchIndex()

◆ getIdForTitle()

◆ getLegacyExportFormatDetector()

◆ getOnSaveValidators()

◆ getPageLanguage()

◆ getPageViewLanguage()

◆ getSpecialPageForCreation()

◆ getTitleForId()

◆ getTitlesForIds()

◆ getUndoContent()

◆ getValidationErrorLocalizer()

◆ isParserCacheSupported()

◆ makeEmptyContent()

◆ makeEmptyEntity()

◆ makeEntityContent()

◆ makeEntityId()

◆ makeEntityRedirectContent()

◆ makeRedirectContent()

◆ newEntityContent()

◆ serializeContent()

◆ showMissingEntity()

◆ supportsCategories()

◆ unserializeContent()

Member Data Documentation

◆ $constraintProvider

◆ $contentCodec

◆ $entityIdParser

◆ $errorLocalizer

◆ $fieldDefinitions

◆ $legacyExportFormatDetector

◆ PARSER_VERSION