DatabaseMapPool.php

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<?php
namespace Magento\CatalogUrlRewrite\Model\Map;

use Magento\Framework\ObjectManagerInterface;

class DatabaseMapPool
{
    private $dataArray = [];

    private $objectManager;

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

    public function getDataMap($instanceName, $categoryId)
    {
        $key = $instanceName . '-' . $categoryId;
        if (!isset($this->dataArray[$key])) {
            $instance = $this->objectManager->create(
                $instanceName,
                [
                    'category' => $categoryId
                ]
            );
            if (!$instance instanceof DatabaseMapInterface) {
                throw new \InvalidArgumentException(
                    $instanceName . ' does not implement interface ' . DatabaseMapInterface::class
                );
            }
            $this->dataArray[$key] = $instance;
        }
        return $this->dataArray[$key];
    }

    public function resetMap($instanceName, $categoryId)
    {
        $key = $instanceName . '-' . $categoryId;
        if (isset($this->dataArray[$key])) {
            $this->dataArray[$key]->destroyTableAdapter($categoryId);
            unset($this->dataArray[$key]);
        }
    }
}