<?php /* * This file is part of the Symfony package. * * (c) Fabien Potencier <fabien@symfony.com> * * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Form\Extension\Core\DataTransformer; use Symfony\Component\Form\DataTransformerInterface; use Symfony\Component\Form\Exception\TransformationFailedException; use Symfony\Component\Form\Extension\Core\ChoiceList\ChoiceListInterface; /** * @author Bernhard Schussek <bschussek@gmail.com> */ class ChoiceToValueTransformer implements DataTransformerInterface { private $choiceList; /** * Constructor. * * @param ChoiceListInterface $choiceList */ public function __construct(ChoiceListInterface $choiceList) { $this->choiceList = $choiceList; } public function transform($choice) { return (string) current($this->choiceList->getValuesForChoices(array($choice))); } public function reverseTransform($value) { if (null !== $value && !is_scalar($value)) { throw new TransformationFailedException('Expected a scalar.'); } // These are now valid ChoiceList values, so we can return null // right away if ('' === $value || null === $value) { return null; } $choices = $this->choiceList->getChoicesForValues(array($value)); if (1 !== count($choices)) { throw new TransformationFailedException(sprintf('The choice "%s" does not exist or is not unique', $value)); } $choice = current($choices); return '' === $choice ? null : $choice; } }