name : CallbackTransformer.php <?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; use Symfony\Component\Form\Exception\UnexpectedTypeException; use Symfony\Component\Form\Exception\TransformationFailedException; class CallbackTransformer implements DataTransformerInterface { /** * The callback used for forward transform * @var \Closure */ private $transform; /** * The callback used for reverse transform * @var \Closure */ private $reverseTransform; /** * Constructor. * * @param \Closure $transform The forward transform callback * @param \Closure $reverseTransform The reverse transform callback */ public function __construct(\Closure $transform, \Closure $reverseTransform) { $this->transform = $transform; $this->reverseTransform = $reverseTransform; } /** * Transforms a value from the original representation to a transformed representation. * * @param mixed $data The value in the original representation * * @return mixed The value in the transformed representation * * @throws UnexpectedTypeException when the argument is not a string * @throws TransformationFailedException when the transformation fails */ public function transform($data) { return call_user_func($this->transform, $data); } /** * Transforms a value from the transformed representation to its original * representation. * * @param mixed $data The value in the transformed representation * * @return mixed The value in the original representation * * @throws UnexpectedTypeException when the argument is not of the expected type * @throws TransformationFailedException when the transformation fails */ public function reverseTransform($data) { return call_user_func($this->reverseTransform, $data); } }