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vendor/symfony/var-exporter/Instantiator.php

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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
+     *
+     * @throws ExceptionInterface When the instance cannot be created
+     */
+    public static function instantiate(string $class, array $properties = [], array $privateProperties = []): object
+    {
+        $reflector = Registry::$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];
+    }
+}