vendor/kriswallsmith/assetic/src/Assetic/Asset/BaseAsset.php

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<?php

/*
 * This file is part of the Assetic package, an OpenSky project.
 *
 * (c) 2010-2014 OpenSky Project Inc
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Assetic\Asset;

use Assetic\Filter\FilterCollection;
use Assetic\Filter\FilterInterface;

/**
 * A base abstract asset.
 *
 * The methods load() and getLastModified() are left undefined, although a
 * reusable doLoad() method is available to child classes.
 *
 * @author Kris Wallsmith <kris.wallsmith@gmail.com>
 */
abstract class BaseAsset implements AssetInterface
{
    private $filters;
    private $sourceRoot;
    private $sourcePath;
    private $sourceDir;
    private $targetPath;
    private $content;
    private $loaded;
    private $vars;
    private $values;

    /**
     * Constructor.
     *
     * @param array  $filters    Filters for the asset
     * @param string $sourceRoot The root directory
     * @param string $sourcePath The asset path
     * @param array  $vars
     */
    public function __construct($filters = array(), $sourceRoot = null, $sourcePath = null, array $vars = array())
    {
        $this->filters = new FilterCollection($filters);
        $this->sourceRoot = $sourceRoot;
        $this->sourcePath = $sourcePath;
        if ($sourcePath && $sourceRoot) {
            $this->sourceDir = dirname("$sourceRoot/$sourcePath");
        }
        $this->vars = $vars;
        $this->values = array();
        $this->loaded = false;
    }

    public function __clone()
    {
        $this->filters = clone $this->filters;