Wikibase\Client\Usage\UsageAspectTransformer Class Reference

Transforms usage aspect based on a filter of aspects relevant in some context. More...

Public Member Functions
	setRelevantAspects (EntityId $entityId, array $aspects)
	getRelevantAspects (EntityId $entityId)
	getFilteredUsages (EntityId $entityId, array $aspects)
	Gets EntityUsage objects for each aspect in $aspects that is relevant according to getRelevantAspects( $entityId ). More...
	transformPageEntityUsages (PageEntityUsages $pageEntityUsages)
	Transforms the entity usages from $pageEntityUsages according to the relevant aspects defined by calling setRelevantAspects(). More...

Private Member Functions
	buildEntityUsages (EntityId $entityId, array $aspects)
	getFilteredAspects (array $aspectKeys, array $relevant)
	Filter $aspects based on the aspects provided by $relevant, according to the rules defined for combining aspects (see class level documentation). More...
	includeGeneralUsages (array $relevantKeys, array $aspectKeys, array &$aspects)
	Makes general (modifier less) usages trigger the associated relevant specialized aspects. More...

Private Attributes
	$relevantAspectsPerEntity

Detailed Description

Transforms usage aspect based on a filter of aspects relevant in some context.

Relevant aspects for each entity are collected using the setRelevantAspects() method.

Example: If a page uses the "label" (L) and "title" (T) aspects of item Q1, a UsageAspectTransformer that was set up to consider the label aspect of Q1 to be relevant will transform the usage Q1::L + Q1::T to the "relevant" usage Q1::L.

Example: The "all" (X) aspect is treated specially: If a page uses the X aspect, a UsageAspectTransformer that was constructed to consider e.g. the label and title aspects of Q1 to be relevant will transform the usage Q1::X to the "relevant" usage Q1::L + Q1::T. Conversely, if a page uses the "sitelink" (S) aspect, a UsageAspectTransformer that was constructed to consider all (X) usages relevant will keep the usage Q1::S usage as "relevant".

Copyright

GPL-2.0-or-later

Author

Daniel Kinzler

Thiemo Kreuz

Member Function Documentation

buildEntityUsages()

Wikibase\Client\Usage\UsageAspectTransformer::buildEntityUsages ( EntityId  $entityId, array  $aspects  )

private

Parameters

EntityId	$entityId
string[]	$aspects	(may have modifiers applied)

Returns

EntityUsage[]

getFilteredAspects()

Wikibase\Client\Usage\UsageAspectTransformer::getFilteredAspects ( array  $aspectKeys, array  $relevant  )

private

Filter $aspects based on the aspects provided by $relevant, according to the rules defined for combining aspects (see class level documentation).

Note

This basically returns the intersection of $aspects and $relevant, except for special treatment of ALL_USAGE and of modified aspects:

• If X is present in $aspects, this method will return $relevant (if "all" is in the base set, the filtered set will be the filter itself).
• If X is present in $relevant, this method returns $aspects (if all aspects are relevant, nothing is filtered out).
• If a modified aspect A.xx is present in $relevant and the unmodified aspect A is present in $aspects, A.xx is included in the result.
• If a modified aspect A.xx is present in $aspect and the unmodified aspect A is present in $relevant, neither A.xx nor A will be included in the result.

Parameters

string[]	$aspectKeys	Array of aspect keys, with modifiers applied.
string[]	$relevant	Array of aspect keys, with modifiers applied.

Returns

string[] Array of aspect keys, with modifiers applied.

getFilteredUsages()

Wikibase\Client\Usage\UsageAspectTransformer::getFilteredUsages	(	EntityId	$entityId,
		array	$aspects
	)

Gets EntityUsage objects for each aspect in $aspects that is relevant according to getRelevantAspects( $entityId ).

Example: If was called with setRelevantAspects( $q3, [ 'T', 'L.de', 'L.en' ] ), getFilteredUsages( $q3, [ 'S', 'L' ] ) will return EntityUsage( $q3, 'L.de', 'L.en' ), while getFilteredUsages( $q3, [ 'X' ] ) will return EntityUsage( $q3, 'T' ) and EntityUsage( $q3, 'L' ).

Parameters

EntityId	$entityId
string[]	$aspects

Returns

EntityUsage[]

getRelevantAspects()

Wikibase\Client\Usage\UsageAspectTransformer::getRelevantAspects

(

EntityId

$entityId

)

Parameters

EntityId

$entityId

Returns

string[]

includeGeneralUsages()

Wikibase\Client\Usage\UsageAspectTransformer::includeGeneralUsages ( array  $relevantKeys, array  $aspectKeys, array &  $aspects  )

private

Makes general (modifier less) usages trigger the associated relevant specialized aspects.

For example matches 'L' in $aspectKeys to 'L.xx' in $relevantKeys.

Parameters

string[]	$relevantKeys	Array of potentially relevant aspect keys, with modifiers applied.
string[]	$aspectKeys	Array of actually used aspects keys, with modifiers applied.
array	&$aspects	Associative array of aspect keys (with modifiers) as keys, the values being meaningless (a.k.a. HashSet).

setRelevantAspects()

Wikibase\Client\Usage\UsageAspectTransformer::setRelevantAspects	(	EntityId	$entityId,
		array	$aspects
	)

Parameters

EntityId	$entityId
string[]	$aspects

transformPageEntityUsages()

Wikibase\Client\Usage\UsageAspectTransformer::transformPageEntityUsages

(

PageEntityUsages

$pageEntityUsages

)

Transforms the entity usages from $pageEntityUsages according to the relevant aspects defined by calling setRelevantAspects().

A new PageEntityUsages containing the filtered usage list is returned.

See also

getFilteredUsages()

Parameters

PageEntityUsages

$pageEntityUsages

Returns

PageEntityUsages

Member Data Documentation

$relevantAspectsPerEntity

Wikibase\Client\Usage\UsageAspectTransformer::$relevantAspectsPerEntity

private

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

• client/includes/Usage/UsageAspectTransformer.php