A universal constructor for Assetic filters

UniversalFilter.php

<?php

use Assetic\Asset\AssetInterface;
use Assetic\Filter\FilterInterface;

class UniversalFilter implements FilterInterface
{
  static private $factories = array();

  private $delegate;

  /**
   * Registers a callable that creates a new filter.
   *
   * @param string   $name     The filter name
   * @param callable $callable The factory callable
   */
  static public function registerFactory($name, $callable)
  {
      self::$factories[$name] = $callable;
  }

  /**
   * Constructor.
   *
   * @param string $name    The filter name
   * @param array  $options The filter options
   */
  public function __construct($name, array $options = array())
  {
      if (!isset(self::$factories[$name])) {
          throw new \InvalidArgumentException('Unrecognized filter: '.$name);
      }

      $this->delegate = call_user_func(self::$factories[$name], $options);
  }

  public function filterLoad(AssetInterface $asset)
  {
    $this->delegate->filterLoad($asset);
  }

  public function filterDump(AssetInterface $asset)
  {
    $this->delegate->filterDump($asset);
  }
}