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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\Contracts\Service;
use Psr\Container\ContainerInterface;
/**
* Implementation of ServiceSubscriberInterface that determines subscribed services from
* private method return types. Service ids are available as "ClassName::methodName".
*
* @author Kevin Bond <kevinbond@gmail.com>
*/
trait ServiceSubscriberTrait
{
/** @var ContainerInterface */
protected $container;
public static function getSubscribedServices(): array
{
static $services;
if (null !== $services) {
return $services;
}
$services = \is_callable(['parent', __FUNCTION__]) ? parent::getSubscribedServices() : [];
foreach ((new \ReflectionClass(self::class))->getMethods() as $method) {
if ($method->isStatic() || $method->isAbstract() || $method->isGenerator() || $method->isInternal() || $method->getNumberOfRequiredParameters()) {
continue;
}
if (self::class === $method->getDeclaringClass()->name && ($returnType = $method->getReturnType()) && !$returnType->isBuiltin()) {
$services[self::class.'::'.$method->name] = '?'.$returnType->getName();
}
}
return $services;
}
/**
* @required
*/
public function setContainer(ContainerInterface $container)
{
$this->container = $container;
if (\is_callable(['parent', __FUNCTION__])) {
return parent::setContainer($container);
}
return null;
}
}