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