MysqlFactory.php

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<?php
namespace Magento\Framework\DB\Adapter\Pdo;

use Magento\Framework\App\ObjectManager;
use Magento\Framework\DB\LoggerInterface;
use Magento\Framework\DB\SelectFactory;
use Magento\Framework\ObjectManagerInterface;

class MysqlFactory
{
    private $objectManager;

    public function __construct(
        ObjectManagerInterface $objectManager
    ) {
        $this->objectManager = $objectManager;
    }

    public function create(
        $className,
        array $config,
        LoggerInterface $logger = null,
        SelectFactory $selectFactory = null
    ) {
        if (!in_array(Mysql::class, class_parents($className, true) + [$className => $className])) {
            throw new \InvalidArgumentException('Invalid class, ' . $className . ' must extend ' . Mysql::class . '.');
        }
        $arguments = [
            'config' => $config
        ];
        if ($logger) {
            $arguments['logger'] = $logger;
        }
        if ($selectFactory) {
            $arguments['selectFactory'] = $selectFactory;
        }
        return $this->objectManager->create(
            $className,
            $arguments
        );
    }
}