/usr/share/php/Symfony/Component/Form/Extension/Core/DataTransformer/ChoiceToValueTransformer.php is in php-symfony-form 3.4.6+dfsg-1.
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/*
* 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\ChoiceList\ChoiceListInterface;
/**
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class ChoiceToValueTransformer implements DataTransformerInterface
{
private $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 !== $value && !is_string($value)) {
throw new TransformationFailedException('Expected a string or null.');
}
$choices = $this->choiceList->getChoicesForValues(array((string) $value));
if (1 !== count($choices)) {
if (null === $value || '' === $value) {
return;
}
throw new TransformationFailedException(sprintf('The choice "%s" does not exist or is not unique', $value));
}
return current($choices);
}
}
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