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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
{
/**
* 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 null|string
*/
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;
}
}
}
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