InputFactory.php

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<?php
declare(strict_types=1);

namespace Magento\Framework\GraphQl\Schema\Type\Input;

use Magento\Framework\GraphQl\Config\ConfigElementInterface;
use Magento\Framework\GraphQl\Schema\Type\InputTypeInterface;
use Magento\Framework\ObjectManagerInterface;

class InputFactory
{
    private $objectManager;

    private $prototypes;

    private $typeRegistry;

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

    public function create(ConfigElementInterface $configElement) : InputTypeInterface
    {
        if (!isset($this->typeRegistry[$configElement->getName()])) {
            $this->typeRegistry[$configElement->getName()] =
                $this->objectManager->create(
                    $this->prototypes[get_class($configElement)],
                    [
                        'configElement' => $configElement
                    ]
                );
        }
        return $this->typeRegistry[$configElement->getName()];
    }
}