Foreign.php

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<?php
namespace Magento\Framework\Setup\Declaration\Schema\Dto\Factories;

use Magento\Framework\App\ResourceConnection;
use Magento\Framework\ObjectManagerInterface;
use Magento\Framework\Setup\Declaration\Schema\Declaration\TableElement\ElementNameResolver;
use Magento\Framework\Setup\Declaration\Schema\TableNameResolver;

class Foreign implements FactoryInterface
{
    const DEFAULT_ON_DELETE = "CASCADE";

    private $objectManager;

    private $className;

    private $resourceConnection;

    private $tableNameResolver;

    private $elementNameResolver;

    public function __construct(
        ObjectManagerInterface $objectManager,
        ResourceConnection $resourceConnection,
        TableNameResolver $tableNameResolver,
        ElementNameResolver $elementNameResolver,
        $className = \Magento\Framework\Setup\Declaration\Schema\Dto\Constraints\Reference::class
    ) {
        $this->objectManager = $objectManager;
        $this->resourceConnection = $resourceConnection;
        $this->className = $className;
        $this->tableNameResolver = $tableNameResolver;
        $this->elementNameResolver = $elementNameResolver;
    }

    public function create(array $data)
    {
        if (!isset($data['onDelete'])) {
            $data['onDelete'] = self::DEFAULT_ON_DELETE;
        }

        $data['nameWithoutPrefix'] = $this->elementNameResolver->getFKNameWithoutPrefix(
            $data['name'],
            $data['table'],
            $data['column'],
            $data['referenceTable'],
            $data['referenceColumn']
        );

        return $this->objectManager->create($this->className, $data);
    }
}