<?php

namespace Symfony\Component\Form;

use Symfony\Component\Form\Exception\TransformationFailedException;

/**
 * @phpstan-template T
 * @phpstan-template R
 */
interface DataTransformerInterface
{
    /**
     * @phpstan-param T|null $value The value in the original representation
     *
     * @phpstan-return R|null The value in the transformed representation
     *
     * @throws TransformationFailedException
     */
    public function transform($value);

    /**
     * @phpstan-param R|null $value The value in the transformed representation
     *
     * @phpstan-return T|null The value in the original representation
     *
     * @throws TransformationFailedException
     */
    public function reverseTransform($value);
}