<?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; /** * Transforms between a Boolean and a string. * * @author Bernhard Schussek <bschussek@gmail.com> * @author Florian Eckerstorfer <florian@eckerstorfer.org> */ class BooleanToStringTransformer implements DataTransformerInterface { /** * The value emitted upon transform if the input is true * @var string */ private $trueValue; /** * Sets the value emitted upon transform if the input is true. * * @param string $trueValue */ public function __construct($trueValue) { $this->trueValue = $trueValue; } /** * Transforms a Boolean into a string. * * @param Boolean $value Boolean value. * * @return string String value. * * @throws TransformationFailedException If the given value is not a Boolean. */ public function transform($value) { if (null === $value) { return null; } if (!is_bool($value)) { throw new TransformationFailedException('Expected a Boolean.'); } return $value ? $this->trueValue : null; } /** * Transforms a string into a Boolean. * * @param string $value String value. * * @return Boolean Boolean value. * * @throws TransformationFailedException If the given value is not a string. */ public function reverseTransform($value) { if (null === $value) { return false; } if (!is_string($value)) { throw new TransformationFailedException('Expected a string.'); } return true; } }