<?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;

/**

 * LoaderResolver selects a loader for a given resource.

 *

 * A resource can be anything (e.g. a full path to a config file or a Closure).

 * Each loader determines whether it can load a resource and how.

 *

 * @author Fabien Potencier <fabien@symfony.com>

 */

class LoaderResolver implements LoaderResolverInterface

{

    /**

     * @var LoaderInterface[] An array of LoaderInterface objects

     */

    private $loaders;

    /**

     * Constructor.

     *

     * @param LoaderInterface[] $loaders An array of loaders

     */

    public function __construct(array $loaders = array())

    {

        $this->loaders = array();

        foreach ($loaders as $loader) {

            $this->addLoader($loader);

        }

    }

    /**

     * Returns a loader able to load the resource.

     *

     * @param mixed  $resource A resource

     * @param string $type     The resource type

     *

     * @return LoaderInterface|false A LoaderInterface instance

     */

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

    {

        foreach ($this->loaders as $loader) {

            if ($loader->supports($resource, $type)) {

                return $loader;

            }

        }

        return false;

    }

    /**

     * Adds a loader.

     *

     * @param LoaderInterface $loader A LoaderInterface instance

     */

    public function addLoader(LoaderInterface $loader)

    {

        $this->loaders[] = $loader;

        $loader->setResolver($this);

    }

    /**

     * Returns the registered loaders.

     *

     * @return LoaderInterface[] An array of LoaderInterface instances

     */

    public function getLoaders()

    {

        return $this->loaders;

    }

}