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vendor/symfony/http-kernel/ControllerMetadata/ArgumentMetadataFactory.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\HttpKernel\ControllerMetadata;
+
+/**
+ * Builds {@see ArgumentMetadata} objects based on the given Controller.
+ *
+ * @author Iltar van der Berg <kjarli@gmail.com>
+ */
+final class ArgumentMetadataFactory implements ArgumentMetadataFactoryInterface
+{
+    public function createArgumentMetadata(string|object|array $controller, ?\ReflectionFunctionAbstract $reflector = null): array
+    {
+        $arguments = [];
+        $reflector ??= new \ReflectionFunction($controller(...));
+
+        foreach ($reflector->getParameters() as $param) {
+            $attributes = [];
+            foreach ($param->getAttributes() as $reflectionAttribute) {
+                if (class_exists($reflectionAttribute->getName())) {
+                    $attributes[] = $reflectionAttribute->newInstance();
+                }
+            }
+
+            $arguments[] = new ArgumentMetadata($param->getName(), $this->getType($param), $param->isVariadic(), $param->isDefaultValueAvailable(), $param->isDefaultValueAvailable() ? $param->getDefaultValue() : null, $param->allowsNull(), $attributes);
+        }
+
+        return $arguments;
+    }
+
+    /**
+     * Returns an associated type to the given parameter if available.
+     */
+    private function getType(\ReflectionParameter $parameter): ?string
+    {
+        if (!$type = $parameter->getType()) {
+            return null;
+        }
+        $name = $type instanceof \ReflectionNamedType ? $type->getName() : (string) $type;
+
+        return match (strtolower($name)) {
+            'self' => $parameter->getDeclaringClass()?->name,
+            'parent' => get_parent_class($parameter->getDeclaringClass()?->name ?? '') ?: null,
+            default => $name,
+        };
+    }
+}