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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\Validator\Mapping\Loader;
use Symfony\Component\Validator\Exception\MappingException;
use Symfony\Component\Validator\Mapping\ClassMetadata;
/**
* Calls multiple LoaderInterface instances in a chain
*
* This class accepts multiple instances of LoaderInterface to be passed to the
* constructor. When loadClassMetadata() is called, the same method is called
* in <em>all</em> of these loaders, regardless of whether any of them was
* successful or not.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*/
class LoaderChain implements LoaderInterface
{
protected $loaders;
/**
* Accepts a list of LoaderInterface instances
*
* @param LoaderInterface[] $loaders An array of LoaderInterface instances
*
* @throws MappingException If any of the loaders does not implement LoaderInterface
*/
public function __construct(array $loaders)
{
foreach ($loaders as $loader) {
if (!$loader instanceof LoaderInterface) {
throw new MappingException(sprintf('Class %s is expected to implement LoaderInterface', get_class($loader)));
}
}
$this->loaders = $loaders;
}
/**
* {@inheritDoc}
*/
public function loadClassMetadata(ClassMetadata $metadata)
{
$success = false;
foreach ($this->loaders as $loader) {
$success = $loader->loadClassMetadata($metadata) || $success;
}
return $success;
}
}