Viewing file:  ChoiceToValueTransformer.php (1.67 KB) -rw-r--r--
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<?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;
}
}
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