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<?php |
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declare(strict_types=1); |
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namespace Stratadox\TableLoader\Loader; |
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use Stratadox\Hydrator\Hydrates; |
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use Stratadox\IdentityMap\MapsObjectsByIdentity as Map; |
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use Throwable; |
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/** |
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* Makes partially hydrated objects from an input array. |
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* |
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* This class makes the objects and fills them with the data from the table. |
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* Note that the relations are omitted at this point, these are to be loaded |
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* later on in the process, by wiring together the related objects. |
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* @see WiresObjects |
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* |
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* @author Stratadox |
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*/ |
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final class Objects implements MakesObjects |
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{ |
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private $hydrate; |
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private $relevantData; |
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private $identifier; |
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private function __construct( |
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Hydrates $theObjects, |
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FiltersTheArray $toTheRelevantDataOnly, |
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IdentifiesEntities $forIndexation |
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) { |
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$this->hydrate = $theObjects; |
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$this->relevantData = $toTheRelevantDataOnly; |
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$this->identifier = $forIndexation; |
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} |
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/** |
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* Makes a new object extractor that produces partially hydrated objects. |
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* |
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* @param Hydrates $theObjects Hydrator for the objects. |
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* @param FiltersTheArray $toTheRelevantDataOnly The filter for the input |
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* array. |
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* @param IdentifiesEntities $forIndexation The row identification |
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* mechanism. |
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* @return MakesObjects The object extractor. |
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*/ |
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public static function producedByThis( |
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Hydrates $theObjects, |
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FiltersTheArray $toTheRelevantDataOnly, |
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IdentifiesEntities $forIndexation |
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): MakesObjects { |
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return new self($theObjects, $toTheRelevantDataOnly, $forIndexation); |
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} |
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/** @inheritdoc */ |
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public function from(array $input, Map $map): ContainsResultingObjects { |
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$data = $this->relevantData->only($input); |
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$label = $this->relevantData->label(); |
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$objects = []; |
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foreach ($data as $row) { |
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if ($this->identifier->isNullFor($row)) { |
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continue; |
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} |
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$hash = $this->identifier->forLoading($row); |
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if (isset($objects[$hash])) { |
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continue; |
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} |
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try { |
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[$objects, $map] = $this->load($row, $map, $hash, $objects); |
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} catch (Throwable $exception) { |
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throw UnmappableRow::encountered($exception, $label, $row); |
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} |
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} |
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return Result::fromArray([$label => $objects], $map); |
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} |
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/** @throws Throwable */ |
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private function load(array $row, Map $map, string $hash, array $objects): array |
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{ |
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$class = $this->hydrate->classFor($row); |
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$id = $this->identifier->forIdentityMap($row); |
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if ($map->has($class, $id)) { |
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$object = $map->get($class, $id); |
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} else { |
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$object = $this->hydrate->fromArray($row); |
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$map = $map->add($id, $object); |
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} |
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$objects[$hash] = $object; |
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return [$objects, $map]; |
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} |
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} |
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Stratadox /
TableLoader
