<?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\Serializer\Encoder;
use Symfony\Component\Serializer\Exception\RuntimeException;
/**
* Decoder delegating the decoding to a chain of decoders.
* @author Jordi Boggiano <j.boggiano@seld.be>
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
* @author Lukas Kahwe Smith <smith@pooteeweet.org>
class ChainDecoder implements DecoderInterface
{
protected $decoders = array();
protected $decoderByFormat = array();
public function __construct(array $decoders = array())
$this->decoders = $decoders;
}
* {@inheritdoc}
final public function decode($data, $format, array $context = array())
return $this->getDecoder($format)->decode($data, $format, $context);
public function supportsDecoding($format)
try {
$this->getDecoder($format);
} catch (RuntimeException $e) {
return false;
return true;
* Gets the decoder supporting the format.
* @param string $format
* @return DecoderInterface
* @throws RuntimeException If no decoder is found.
private function getDecoder($format)
if (isset($this->decoderByFormat[$format])
&& isset($this->decoders[$this->decoderByFormat[$format]])
) {
return $this->decoders[$this->decoderByFormat[$format]];
foreach ($this->decoders as $i => $decoder) {
if ($decoder->supportsDecoding($format)) {
$this->decoderByFormat[$format] = $i;
return $decoder;
throw new RuntimeException(sprintf('No decoder found for format "%s".', $format));