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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
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function createArgumentMetadata($controller)
+    {
+        $arguments = array();
+
+        if (is_array($controller)) {
+            $reflection = new \ReflectionMethod($controller[0], $controller[1]);
+        } elseif (is_object($controller) && !$controller instanceof \Closure) {
+            $reflection = (new \ReflectionObject($controller))->getMethod('__invoke');
+        } else {
+            $reflection = new \ReflectionFunction($controller);
+        }
+
+        foreach ($reflection->getParameters() as $param) {
+            $arguments[] = new ArgumentMetadata($param->getName(), $this->getType($param), $param->isVariadic(), $param->isDefaultValueAvailable(), $param->isDefaultValueAvailable() ? $param->getDefaultValue() : null, $param->allowsNull());
+        }
+
+        return $arguments;
+    }
+
+    /**
+     * Returns an associated type to the given parameter if available.
+     *
+     * @param \ReflectionParameter $parameter
+     *
+     * @return null|string
+     */
+    private function getType(\ReflectionParameter $parameter)
+    {
+        if (!$type = $parameter->getType()) {
+            return;
+        }
+
+        return $type->getName();
+    }
+}