<?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);
}
}
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