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<?php
namespace SMW\Serializers;
use OutOfBoundsException;
use Serializers\Serializer;
use SMW\Exporter\Element\ExpElement;
use SMWExpData as ExpData;
/**
* @license GNU GPL v2+
* @since 2.2
*
* @author mwjames
*/
class ExpDataSerializer implements Serializer {
/**
* @see Serializer::serialize
*
* @since 2.2
*/
public function serialize( $expData ) {
if ( !$expData instanceof ExpData ) {
throw new OutOfBoundsException( 'Object is not supported' );
}
return $this->doSerialize( $expData ) + [ 'serializer' => __CLASS__, 'version' => 0.1 ];
}
private function doSerialize( $expData ) {
$serialization = [
'subject' => $expData->getSubject()->getSerialization()
];
$properties = [];
foreach ( $expData->getProperties() as $property ) {
$properties[$property->getUri()] = [
'property' => $property->getSerialization(),
'children' => $this->doSerializeChildren( $expData->getValues( $property ) )
];
}
return $serialization + [ 'data' => $properties ];
}
private function doSerializeChildren( array $elements ) {
$children = [];
if ( $elements === [] ) {
return $children;
}
foreach ( $elements as $element ) {
$children[] = $element instanceof ExpElement ? $element->getSerialization() : $this->doSerialize( $element );
}
return $children;
}
}
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