<?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;

/**

 * Loader is the abstract class used by all built-in loaders.

 *

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

 */

abstract class Loader implements LoaderInterface

{

    protected $resolver;

    /**

     * Gets the loader resolver.

     *

     * @return LoaderResolver A LoaderResolver instance

     */

    public function getResolver()

    {

        return $this->resolver;

    }

    /**

     * Sets the loader resolver.

     *

     * @param LoaderResolver $resolver A LoaderResolver instance

     */

    public function setResolver(LoaderResolver $resolver)

    {

        $this->resolver = $resolver;

    }

    /**

     * Imports a resource.

     *

     * @param mixed  $resource A Resource

     * @param string $type     The resource type

     */

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

    {

        $this->resolve($resource)->load($resource, $type);

    }

    /**

     * Finds a loader able to load an imported resource.

     *

     * @param mixed  $resource A Resource

     * @param string $type     The resource type

     *

     * @return LoaderInterface A LoaderInterface instance

     *

     * @throws FileLoaderLoadException if no loader is found

     */

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

    {

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

            return $this;

        }

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

        if (false === $loader) {

            throw new FileLoaderLoadException($resource);

        }

        return $loader;

    }

}