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<?php
namespace SMW\Exporter\ResourceBuilders;
use SMW\ApplicationFactory;
use SMW\DIProperty;
use SMW\Exporter\ResourceBuilder;
use SMWDataItem as DataItem;
use SMWExpData as ExpData;
use SMWExporter as Exporter;
/**
* @private
*
* @license GNU GPL v2+
* @since 2.5
*
* @author mwjames
*/
class PropertyValueResourceBuilder implements ResourceBuilder {
/**
* @var Exporter
*/
protected $exporter;
/**
* @var InMemoryPoolCache
*/
private $inMemoryPoolCache;
/**
* @since 2.5
*
* @param Exporter|null $exporter
*/
public function __construct( Exporter $exporter = null ) {
$this->exporter = $exporter;
if ( $this->exporter === null ) {
$this->exporter = Exporter::getInstance();
}
$this->inMemoryPoolCache = ApplicationFactory::getInstance()->getInMemoryPoolCache()->getPoolCacheById(
Exporter::POOLCACHE_ID
);
}
/**
* @since 2.5
*
* {@inheritDoc}
*/
public function isResourceBuilderFor( DIProperty $property ) {
return true;
}
/**
* @since 2.5
*
* {@inheritDoc}
*/
public function addResourceValue( ExpData $expData, DIProperty $property, DataItem $dataItem ) {
$expElement = $this->exporter->getDataItemExpElement(
$dataItem
);
if ( $expElement !== null ) {
$expData->addPropertyObjectValue(
$this->getResourceElementForProperty( $property ),
$expElement
);
}
$this->addResourceHelperValue(
$expData,
$property,
$dataItem
);
}
protected function addResourceHelperValue( ExpData $expData, DIProperty $property, DataItem $dataItem ) {
$expElementHelper = $this->exporter->getDataItemHelperExpElement(
$dataItem
);
if ( $expElementHelper !== null ) {
$expData->addPropertyObjectValue(
$this->getResourceElementHelperForProperty( $property ),
$expElementHelper
);
}
}
protected function getResourceElementForProperty( $property ) {
$key = 'resource:builder:' . $property->getKey();
if ( ( $resourceElement = $this->inMemoryPoolCache->fetch( $key ) ) !== false ) {
return $resourceElement;
}
$resourceElement = $this->exporter->getResourceElementForProperty( $property );
$this->inMemoryPoolCache->save(
$key,
$resourceElement
);
return $resourceElement;
}
protected function getResourceElementHelperForProperty( $property ) {
$key = 'resource:builder:aux:' . $property->getKey();
if ( ( $resourceElement = $this->inMemoryPoolCache->fetch( $key ) ) !== false ) {
return $resourceElement;
}
$resourceElement = $this->exporter->getResourceElementForProperty( $property, true );
$this->inMemoryPoolCache->save(
$key,
$resourceElement
);
return $resourceElement;
}
}
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