<?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

     *

     * @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);

    }

    /**

     * Returns true if this class supports the given resource.

     *

     * @param mixed  $resource A resource

     * @param string $type     The resource type

     *

     * @return Boolean true if this class supports the given resource, false otherwise

     */

    public function supports($resource, $type = null)

    {

        return false === $this->resolver->resolve($resource, $type) ? false : true;

    }

}