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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\ChoiceList\ChoiceListInterface;
use Symfony\Component\Form\DataTransformerInterface;
use Symfony\Component\Form\Exception\TransformationFailedException;
/**
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class ChoicesToValuesTransformer implements DataTransformerInterface
{
private $choiceList;
public function __construct(ChoiceListInterface $choiceList)
{
$this->choiceList = $choiceList;
}
/**
* @return array
*
* @throws TransformationFailedException if the given value is not an array
*/
public function transform($array)
{
if (null === $array) {
return [];
}
if (!\is_array($array)) {
throw new TransformationFailedException('Expected an array.');
}
return $this->choiceList->getValuesForChoices($array);
}
/**
* @return array
*
* @throws TransformationFailedException if the given value is not an array
* or if no matching choice could be
* found for some given value
*/
public function reverseTransform($array)
{
if (null === $array) {
return [];
}
if (!\is_array($array)) {
throw new TransformationFailedException('Expected an array.');
}
$choices = $this->choiceList->getChoicesForValues($array);
if (\count($choices) !== \count($array)) {
throw new TransformationFailedException('Could not find all matching choices for the given values');
}
return $choices;
}
}
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