Classes List

Symfony\Component\Form\Extension\Core\DataTransformer\DataTransformerChain

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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\DataTransformerInterface;
use Symfony\Component\Form\Exception\TransformationFailedException;

/** * Passes a value through multiple value transformers. * * @author Bernhard Schussek <bschussek@gmail.com> */
class DataTransformerChain implements DataTransformerInterface
{
    protected $transformers;

    /** * Uses the given value transformers to transform values. * * @param DataTransformerInterface[] $transformers */
    public function __construct(array $transformers)
    {
        $this->transformers = $transformers;
    }

    /** * Passes the value through the transform() method of all nested transformers. * * The transformers receive the value in the same order as they were passed * to the constructor. Each transformer receives the result of the previous * transformer as input. The output of the last transformer is returned * by this method. * * @param mixed $value The original value * * @return mixed The transformed value * * @throws TransformationFailedException */
    public function transform($value)
    {
        foreach ($this->transformers as $transformer) {
            $value = $transformer->transform($value);
        }

        return $value;
    }

    /** * Passes the value through the reverseTransform() method of all nested * transformers. * * The transformers receive the value in the reverse order as they were passed * to the constructor. Each transformer receives the result of the previous * transformer as input. The output of the last transformer is returned * by this method. * * @param mixed $value The transformed value * * @return mixed The reverse-transformed value * * @throws TransformationFailedException */
    public function reverseTransform($value)
    {
        for ($i = count($this->transformers) - 1$i >= 0--$i) {
            $value = $this->transformers[$i]->reverseTransform($value);
        }

        return $value;
    }

    /** * @return DataTransformerInterface[] */
    public function getTransformers()
    {
        return $this->transformers;
    }
}