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<?php declare(strict_types=1); |
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namespace Igni\Storage\Hydration; |
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use Igni\Storage\EntityManager; |
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use Igni\Storage\Exception\HydratorException; |
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use Igni\Storage\Mapping\MappingStrategy; |
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use Igni\Storage\Mapping\MetaData\EntityMetaData; |
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use Igni\Utils\ReflectionApi; |
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final class HydratorFactory |
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{ |
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public const STRATEGY_ANNOTATION = 1; |
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private $entityManager; |
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private $autoGenerate; |
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private $hydrators = []; |
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public function __construct( |
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EntityManager $entityManager, |
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$autoGenerate = HydratorAutoGenerate::ALWAYS |
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) { |
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$this->entityManager = $entityManager; |
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$this->autoGenerate = $autoGenerate; |
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} |
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public function get(string $entityClass): ObjectHydrator |
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{ |
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if (isset($this->hydrators[$entityClass])) { |
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return $this->hydrators[$entityClass]; |
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} |
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$entityMeta = $this->entityManager->getMetaData($entityClass); |
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$hydratorClassName = $entityMeta->getHydratorClassName(); |
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$namespace = $this->entityManager->getHydratorNamespace(); |
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$hydratorClass = $namespace . '\\' . $hydratorClassName; |
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// Fix for already loaded but not initialized hydrator. |
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if (class_exists($hydratorClass)) { |
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$objectHydrator = new $hydratorClass($this->entityManager); |
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if ($entityMeta->definesCustomHydrator()) { |
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$customHydratorClass = $entityMeta->getCustomHydratorClass(); |
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$objectHydrator = new $customHydratorClass($objectHydrator); |
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} |
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return $this->hydrators[$entityMeta->getClass()] = $objectHydrator; |
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} |
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$fileName = $this->entityManager->getHydratorDir() . DIRECTORY_SEPARATOR . str_replace('\\', '', $hydratorClassName) . '.php'; |
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switch ($this->autoGenerate) { |
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case HydratorAutoGenerate::NEVER: |
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require_once $fileName; |
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break; |
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case HydratorAutoGenerate::IF_NOT_EXISTS: |
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if (!is_readable($fileName)) { |
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$hydrator = $this->create($entityMeta, true); |
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$this->writeHydrator($hydrator, $fileName); |
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} else { |
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require_once $fileName; |
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} |
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break; |
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case HydratorAutoGenerate::ALWAYS: |
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default: |
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$this->create($entityMeta, true); |
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break; |
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} |
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$objectHydrator = new $hydratorClass($this->entityManager); |
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if ($entityMeta->definesCustomHydrator()) { |
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$customHydratorClass = $entityMeta->getCustomHydratorClass(); |
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$objectHydrator = new $customHydratorClass($objectHydrator); |
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} |
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return $this->hydrators[$entityMeta->getClass()] = $objectHydrator; |
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} |
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private function create(EntityMetaData $metaData, bool $load = false): ReflectionApi\RuntimeClass |
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{ |
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if ($this->entityManager->getHydratorNamespace() !== '') { |
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$hydratorClass = ReflectionApi::createClass($this->entityManager->getHydratorNamespace() . '\\' . $metaData->getHydratorClassName()); |
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} else { |
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$hydratorClass = ReflectionApi::createClass($metaData->getHydratorClassName()); |
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} |
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$hydratorClass->extends(GenericHydrator::class); |
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$getEntityClassMethod = new ReflectionApi\RuntimeMethod('getEntityClass'); |
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$getEntityClassMethod->makeStatic(); |
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$getEntityClassMethod->makeFinal(); |
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$getEntityClassMethod->setReturnType('string'); |
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$getEntityClassMethod->setBody( |
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'return \\' . $metaData->getClass() . '::class;' |
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); |
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$hydratorClass->addMethod($getEntityClassMethod); |
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$hydrateMethod = new ReflectionApi\RuntimeMethod('hydrate'); |
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$hydrateMethod->addArgument(new ReflectionApi\RuntimeArgument('data', 'array')); |
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$hydrateMethod->setReturnType($metaData->getClass()); |
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$hydrateMethod->addLine('$entity = \\' . ReflectionApi::class . '::createInstance(self::getEntityClass());'); |
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$hydratorClass->addMethod($hydrateMethod); |
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$extractMethod = new ReflectionApi\RuntimeMethod('extract'); |
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$extractMethod->addArgument(new ReflectionApi\RuntimeArgument('entity')); |
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$extractMethod->setReturnType('array'); |
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$extractMethod->addLine("\$data = [];"); |
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$hydratorClass->addMethod($extractMethod); |
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foreach ($metaData->getProperties() as $property) { |
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/** @var MappingStrategy $type */ |
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$type = $property->getType(); |
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$attributes = $property->getAttributes(); |
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if (method_exists($type, 'getDefaultAttributes')) { |
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$attributes += $type::getDefaultAttributes(); |
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} |
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$attributes = preg_replace('/\s+/', '', var_export($attributes, true)); |
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// Build hydrator for property. |
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$hydrateMethod->addLine("// Hydrate {$property->getName()}."); |
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$hydrateMethod->addLine("\$value = \$data['{$property->getFieldName()}'] ?? null;"); |
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$hydrateMethod->addLine("\\{$type}::hydrate(\$value, ${attributes}, \$this->entityManager);"); |
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$hydrateMethod->addLine('\\' . ReflectionApi::class . "::writeProperty(\$entity, '{$property->getName()}', \$value);"); |
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// Store objects hydrated by reference |
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$hydrateMethod->addLine("if (\$this->saveMemory === false && \$entity instanceof \Igni\Storage\Storable) {"); |
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$hydrateMethod->addLine("\t\$this->entityManager->attach(\$entity);"); |
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$hydrateMethod->addLine("}"); |
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// Build extractor for property. |
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if (!$property->getAttributes()['readonly']) { |
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$extractMethod->addLine("// Extract {$property->getName()}."); |
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$extractMethod->addLine('$value = \\' . ReflectionApi::class . "::readProperty(\$entity, '{$property->getName()}');"); |
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$extractMethod->addLine("\\{$type}::extract(\$value, ${attributes}, \$this->entityManager);"); |
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$extractMethod->addLine("\$data['{$property->getFieldName()}'] = \$value;"); |
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} |
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} |
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$hydrateMethod->addLine('return $entity;'); |
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$extractMethod->addLine('return $data;'); |
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if ($load) { |
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$hydratorClass->load(); |
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} |
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return $hydratorClass; |
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} |
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private function writeHydrator(ReflectionApi\RuntimeClass $hydrator, string $uri): void |
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{ |
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$temp = fopen($uri, 'w'); |
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if ($temp === false || !fwrite($temp, '<?php declare(strict_types=1);' . PHP_EOL . (string) $hydrator)) { |
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throw new HydratorException("Could not write hydrator (${uri}) on disk - check for directory permissions."); |
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} |
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fclose($temp); |
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} |
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} |
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igniphp /
storage
