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<?php
namespace SMW\Deserializers\DVDescriptionDeserializer;
use RuntimeException;
use SMWDataValue as DataValue;
/**
* @private
*
* @license GNU GPL v2+
* @since 2.3
*
* @author mwjames
*/
class DispatchingDescriptionDeserializer {
/**
* @var DescriptionDeserializer[]
*/
private $descriptionDeserializers = [];
/**
* @var DescriptionDeserializer
*/
private $defaultDescriptionDeserializer = null;
/**
* @since 2.3
*
* @param DescriptionDeserializer $descriptionDeserializer
*/
public function addDescriptionDeserializer( DescriptionDeserializer $descriptionDeserializer ) {
$this->descriptionDeserializers[] = $descriptionDeserializer;
}
/**
* @since 2.3
*
* @param DescriptionDeserializer $defaultDescriptionDeserializer
*/
public function addDefaultDescriptionDeserializer( DescriptionDeserializer $defaultDescriptionDeserializer ) {
$this->defaultDescriptionDeserializer = $defaultDescriptionDeserializer;
}
/**
* @since 2.3
*
* @param DataValue $dataValue
*
* @return DescriptionDeserializer
* @throws RuntimeException
*/
public function getDescriptionDeserializerBy( DataValue $dataValue ) {
foreach ( $this->descriptionDeserializers as $descriptionDeserializer ) {
if ( $descriptionDeserializer->isDeserializerFor( $dataValue ) ) {
$descriptionDeserializer->setDataValue( $dataValue );
return $descriptionDeserializer;
}
}
if ( $this->defaultDescriptionDeserializer !== null && $this->defaultDescriptionDeserializer->isDeserializerFor( $dataValue ) ) {
$this->defaultDescriptionDeserializer->setDataValue( $dataValue );
return $this->defaultDescriptionDeserializer;
}
throw new RuntimeException( "Missing registered DescriptionDeserializer." );
}
}
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