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<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\VarExporter; use Symfony\Component\VarExporter\Exception\ExceptionInterface; use Symfony\Component\VarExporter\Exception\NotInstantiableTypeException; use Symfony\Component\VarExporter\Internal\Hydrator; use Symfony\Component\VarExporter\Internal\Registry; /** * A utility class to create objects without calling their constructor. * * @author Nicolas Grekas <p@tchwork.com> */ final class Instantiator { /** * Creates an object and sets its properties without calling its constructor nor any other methods. * * For example: * * // creates an empty instance of Foo * Instantiator::instantiate(Foo::class); * * // creates a Foo instance and sets one of its properties * Instantiator::instantiate(Foo::class, ['propertyName' => $propertyValue]); * * // creates a Foo instance and sets a private property defined on its parent Bar class * Instantiator::instantiate(Foo::class, [], [ * Bar::class => ['privateBarProperty' => $propertyValue], * ]); * * Instances of ArrayObject, ArrayIterator and SplObjectHash can be created * by using the special "\0" property name to define their internal value: * * // creates an SplObjectHash where $info1 is attached to $obj1, etc. * Instantiator::instantiate(SplObjectStorage::class, ["\0" => [$obj1, $info1, $obj2, $info2...]]); * * // creates an ArrayObject populated with $inputArray * Instantiator::instantiate(ArrayObject::class, ["\0" => [$inputArray]]); * * @param string $class The class of the instance to create * @param array $properties The properties to set on the instance * @param array $privateProperties The private properties to set on the instance, * keyed by their declaring class * * @return object The created instance * * @throws ExceptionInterface When the instance cannot be created */ public static function instantiate(string $class, array $properties = [], array $privateProperties = []) { $reflector = Registry::$reflectors[$class] ?? Registry::getClassReflector($class); if (Registry::$cloneable[$class]) { $wrappedInstance = [clone Registry::$prototypes[$class]]; } elseif (Registry::$instantiableWithoutConstructor[$class]) { $wrappedInstance = [$reflector->newInstanceWithoutConstructor()]; } elseif (null === Registry::$prototypes[$class]) { throw new NotInstantiableTypeException($class); } elseif ($reflector->implementsInterface('Serializable') && (\PHP_VERSION_ID < 70400 || !method_exists($class, '__unserialize'))) { $wrappedInstance = [unserialize('C:'.\strlen($class).':"'.$class.'":0:{}')]; } else { $wrappedInstance = [unserialize('O:'.\strlen($class).':"'.$class.'":0:{}')]; } if ($properties) { $privateProperties[$class] = isset($privateProperties[$class]) ? $properties + $privateProperties[$class] : $properties; } foreach ($privateProperties as $class => $properties) { if (!$properties) { continue; } foreach ($properties as $name => $value) { // because they're also used for "unserialization", hydrators // deal with array of instances, so we need to wrap values $properties[$name] = [$value]; } (Hydrator::$hydrators[$class] ?? Hydrator::getHydrator($class))($properties, $wrappedInstance); } return $wrappedInstance[0]; } }