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<?php |
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declare(strict_types=1); |
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namespace GeneratedHydrator\ClosureGenerator\Runtime; |
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use Closure; |
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use GeneratedHydrator\ClosureGenerator\GenerateExtractor; |
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use GeneratedHydrator\Configuration; |
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use ReflectionClass; |
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use ReflectionException; |
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use stdClass; |
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use Zend\Hydrator\ExtractionInterface; |
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final class GenerateRuntimeExtractor implements GenerateExtractor |
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{ |
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/** @var callable[] */ |
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private static $extractorsCache; |
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/** @var ReflectionClass[] */ |
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private static $classesCache; |
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/** |
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* @return callable function ($object) : array |
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* |
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* @throws ReflectionException |
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*/ |
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public function __invoke(string $className) : callable |
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{ |
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if (isset(self::$extractorsCache[$className])) { |
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return self::$extractorsCache[$className]; |
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} |
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if ($className === stdClass::class) { |
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return $this->generateWorkaroundExtractor($className); |
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} |
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$propertyNames = $this->getPropertyNames($className); |
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$parentExtractor = $this->generateParentExtractor($className); |
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// Kind of micro optimization: avoid to inherit $parentHydrator from this scope and to check it in the closure |
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if ($parentExtractor === null) { |
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$extractor = static function (object $object) use ($propertyNames) : array { |
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$data = []; |
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foreach ($propertyNames as $propertyName) { |
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$data[$propertyName] = $object->{$propertyName}; |
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} |
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return $data; |
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}; |
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} else { |
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$extractor = static function (object $object) use ($propertyNames, $parentExtractor) : array { |
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$data = $parentExtractor($object); |
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foreach ($propertyNames as $propertyName) { |
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$data[$propertyName] = $object->{$propertyName}; |
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} |
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return $data; |
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}; |
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} |
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return self::$extractorsCache[$className] = Closure::bind($extractor, null, $className); |
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} |
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/** |
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* @throws ReflectionException |
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*/ |
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private function generateParentExtractor(string $className) : ?callable |
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{ |
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$parent = $this->getClass($className)->getParentClass(); |
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if ($parent === false) { |
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return null; |
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} |
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return $this($parent->getName()); |
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} |
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/** |
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* @return string[] |
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* |
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* @throws ReflectionException |
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*/ |
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private function getPropertyNames(string $className) : array |
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{ |
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$class = $this->getClass($className); |
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$propertyNames = []; |
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foreach ($class->getProperties() as $property) { |
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if ($property->isStatic()) { |
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continue; |
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} |
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$propertyNames[] = $property->getName(); |
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} |
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return $propertyNames; |
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} |
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/** |
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* @throws ReflectionException |
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*/ |
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private function getClass(string $className) : ReflectionClass |
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{ |
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if (isset(self::$classesCache[$className])) { |
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return self::$classesCache[$className]; |
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} |
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$class = new ReflectionClass($className); |
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return self::$classesCache[$className] = $class; |
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} |
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private function generateWorkaroundExtractor(string $className) : callable |
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{ |
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$config = new Configuration($className); |
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$generatedClass = $config->createFactory()->getHydratorClass(); |
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/** @var ExtractionInterface $hydrator */ |
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$hydrator = new $generatedClass(); |
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return static function (object $object) use ($hydrator) { |
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return $hydrator->extract($object); |
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}; |
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} |
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} |
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Ocramius /
GeneratedHydrator
