zf2 (zf3) AbstractFactory

<?php
namespace Layout\ServiceManager\AbstractFactory;
use Interop\Container\ContainerInterface;
use Zend\ServiceManager\AbstractFactoryInterface;
use Zend\ServiceManager\ServiceLocatorInterface;
class Factory implements AbstractFactoryInterface
{
    const INJECTIONS = 'injections';
    const PARAMETERS = 'parameters';
    /**
     * {@inheritdoc}
     */
    public function canCreate(ContainerInterface $container, $requestedName)
    {
        return $this->canCreateServiceWithName($container, $requestedName, $requestedName);
    }
    /**
     * {@inheritdoc}
     */
    public function __invoke(ContainerInterface $container, $requestedName, array $options = null)
    {
        return $this->createServiceWithName($container, $requestedName, $requestedName);
    }
    /**
     * {@inheritdoc}
     */
    public function canCreateServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
    {
        return class_exists($requestedName, true);
    }
    /**
     * {@inheritdoc}
     */
    public function createServiceWithName(ServiceLocatorInterface $serviceLocator, $name, $requestedName)
    {
        $config = $serviceLocator->get('config')['di']['instance'];
        if (!array_key_exists($requestedName, $config)) {
            return new $requestedName();
        }
        $args = [];
        if (array_key_exists(self::INJECTIONS, $config[$requestedName])) {
            foreach ($config[$requestedName][self::INJECTIONS] as $injectionName) {
                $args[] = $serviceLocator->get($injectionName);
            }
        }
        if (array_key_exists(self::PARAMETERS, $config[$requestedName])) {
            foreach ($config[$requestedName][self::PARAMETERS] as $parameterValue) {
                $args[] = $parameterValue;
            }
        }
        return new $requestedName(...$args);
    }
}