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vendor/symfony/http-kernel/ControllerMetadata/ArgumentMetadataFactory.php

@@ -0,0 +1,141 @@
+<?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
+{
+    /**
+     * If the ...$arg functionality is available.
+     *
+     * Requires at least PHP 5.6.0 or HHVM 3.9.1
+     *
+     * @var bool
+     */
+    private $supportsVariadic;
+
+    /**
+     * If the reflection supports the getType() method to resolve types.
+     *
+     * Requires at least PHP 7.0.0 or HHVM 3.11.0
+     *
+     * @var bool
+     */
+    private $supportsParameterType;
+
+    public function __construct()
+    {
+        $this->supportsVariadic = method_exists('ReflectionParameter', 'isVariadic');
+        $this->supportsParameterType = method_exists('ReflectionParameter', 'getType');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function createArgumentMetadata($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, $reflection), $this->isVariadic($param), $this->hasDefaultValue($param), $this->getDefaultValue($param), $param->allowsNull());
+        }
+
+        return $arguments;
+    }
+
+    /**
+     * Returns whether an argument is variadic.
+     *
+     * @param \ReflectionParameter $parameter
+     *
+     * @return bool
+     */
+    private function isVariadic(\ReflectionParameter $parameter)
+    {
+        return $this->supportsVariadic && $parameter->isVariadic();
+    }
+
+    /**
+     * Determines whether an argument has a default value.
+     *
+     * @param \ReflectionParameter $parameter
+     *
+     * @return bool
+     */
+    private function hasDefaultValue(\ReflectionParameter $parameter)
+    {
+        return $parameter->isDefaultValueAvailable();
+    }
+
+    /**
+     * Returns a default value if available.
+     *
+     * @param \ReflectionParameter $parameter
+     *
+     * @return mixed|null
+     */
+    private function getDefaultValue(\ReflectionParameter $parameter)
+    {
+        return $this->hasDefaultValue($parameter) ? $parameter->getDefaultValue() : null;
+    }
+
+    /**
+     * Returns an associated type to the given parameter if available.
+     *
+     * @param \ReflectionParameter $parameter
+     *
+     * @return string|null
+     */
+    private function getType(\ReflectionParameter $parameter, \ReflectionFunctionAbstract $function)
+    {
+        if ($this->supportsParameterType) {
+            if (!$type = $parameter->getType()) {
+                return;
+            }
+            $name = $type instanceof \ReflectionNamedType ? $type->getName() : $type->__toString();
+            if ('array' === $name && !$type->isBuiltin()) {
+                // Special case for HHVM with variadics
+                return;
+            }
+        } elseif (preg_match('/^(?:[^ ]++ ){4}([a-zA-Z_\x7F-\xFF][^ ]++)/', $parameter, $name)) {
+            $name = $name[1];
+        } else {
+            return;
+        }
+        $lcName = strtolower($name);
+
+        if ('self' !== $lcName && 'parent' !== $lcName) {
+            return $name;
+        }
+        if (!$function instanceof \ReflectionMethod) {
+            return;
+        }
+        if ('self' === $lcName) {
+            return $function->getDeclaringClass()->name;
+        }
+        if ($parent = $function->getDeclaringClass()->getParentClass()) {
+            return $parent->name;
+        }
+    }
+}