vendor/symfony/form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php line 32

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  1. <?php
  3. /*
  4. * This file is part of the Symfony package.
  5. *
  6. * (c) Fabien Potencier <[email protected]>
  7. *
  8. * For the full copyright and license information, please view the LICENSE
  9. * file that was distributed with this source code.
  10. */
  12. namespace Symfony\Component\Form\Extension\Core\DataTransformer;
  14. use Symfony\Component\Form\ChoiceList\ChoiceListInterface;
  15. use Symfony\Component\Form\DataTransformerInterface;
  16. use Symfony\Component\Form\Exception\TransformationFailedException;
  18. /**
  19. * @author Bernhard Schussek <[email protected]>
  20. */
  21. class ChoiceToValueTransformer implements DataTransformerInterface
  22. {
  23. private $choiceList;
  25. public function __construct(ChoiceListInterface $choiceList)
  26. {
  27. $this->choiceList = $choiceList;
  28. }
  30. public function transform($choice)
  31. {
  32. return (string) current($this->choiceList->getValuesForChoices([$choice]));
  33. }
  35. public function reverseTransform($value)
  36. {
  37. if (null !== $value && !\is_string($value)) {
  38. throw new TransformationFailedException('Expected a string or null.');
  39. }
  41. $choices = $this->choiceList->getChoicesForValues([(string) $value]);
  43. if (1 !== \count($choices)) {
  44. if (null === $value || '' === $value) {
  45. return null;
  46. }
  48. throw new TransformationFailedException(sprintf('The choice "%s" does not exist or is not unique.', $value));
  49. }
  51. return current($choices);
  52. }
  53. }