<?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;

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);

    }

}