Viewing file:  ChainEncoder.php (2.47 KB) -rw-r--r--
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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\Serializer\Encoder;
use Symfony\Component\Serializer\Exception\RuntimeException;
/**
* Encoder delegating the decoding to a chain of encoders.
*
* @author Jordi Boggiano <j.boggiano@seld.be>
* @author Johannes M. Schmitt <schmittjoh@gmail.com>
* @author Lukas Kahwe Smith <smith@pooteeweet.org>
*/
class ChainEncoder implements EncoderInterface
{
protected $encoders = array();
protected $encoderByFormat = array();
public function __construct(array $encoders = array())
{
$this->encoders = $encoders;
}
/**
* {@inheritdoc}
*/
final public function encode($data, $format, array $context = array())
{
return $this->getEncoder($format)->encode($data, $format, $context);
}
/**
* {@inheritdoc}
*/
public function supportsEncoding($format)
{
try {
$this->getEncoder($format);
} catch (RuntimeException $e) {
return false;
}
return true;
}
/**
* Checks whether the normalization is needed for the given format.
*
* @param string $format
*
* @return Boolean
*/
public function needsNormalization($format)
{
$encoder = $this->getEncoder($format);
if (!$encoder instanceof NormalizationAwareInterface) {
return true;
}
if ($encoder instanceof self) {
return $encoder->needsNormalization($format);
}
return false;
}
/**
* Gets the encoder supporting the format.
*
* @param string $format
*
* @return EncoderInterface
* @throws RuntimeException if no encoder is found
*/
private function getEncoder($format)
{
if (isset($this->encoderByFormat[$format])
&& isset($this->encoders[$this->encoderByFormat[$format]])
) {
return $this->encoders[$this->encoderByFormat[$format]];
}
foreach ($this->encoders as $i => $encoder) {
if ($encoder->supportsEncoding($format)) {
$this->encoderByFormat[$format] = $i;
return $encoder;
}
}
throw new RuntimeException(sprintf('No encoder found for format "%s".', $format));
}
}
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