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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\Config\Loader;

use Symfony\Component\Config\Exception\FileLoaderLoadException;

/**
* DelegatingLoader delegates loading to other loaders using a loader resolver.
*
* This loader acts as an array of LoaderInterface objects - each having
* a chance to load a given resource (handled by the resolver)
*
* @author Fabien Potencier <fabien@symfony.com>
*/
class DelegatingLoader extends Loader
{
    /**
* Constructor.
*
* @param LoaderResolverInterface $resolver A LoaderResolverInterface instance
*/
    public function __construct(LoaderResolverInterface $resolver)
    {
        $this->resolver = $resolver;
    }

    /**
* Loads a resource.
*
* @param mixed $resource A resource
* @param string $type The resource type
*
* @return mixed
*
* @throws FileLoaderLoadException if no loader is found.
*/
    public function load($resource, $type = null)
    {
        if (false === $loader = $this->resolver->resolve($resource, $type)) {
            throw new FileLoaderLoadException($resource);
        }

        return $loader->load($resource, $type);
    }

    /**
* {@inheritdoc}
*/
    public function supports($resource, $type = null)
    {
        return false === $this->resolver->resolve($resource, $type) ? false : true;
    }
}
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