class FilterCollection

AssetCollection.php in drupal/core/vendor/kriswallsmith/assetic/src/Assetic/Asset/AssetCollection.php

BaseAsset.php in drupal/core/vendor/kriswallsmith/assetic/src/Assetic/Asset/BaseAsset.php

FilterCollectionTest.php in drupal/core/vendor/kriswallsmith/assetic/tests/Assetic/Test/Filter/FilterCollectionTest.php

class FilterCollection implements FilterInterface, \IteratorAggregate, \Countable {
  private $filters = array();
  public function __construct($filters = array()) {
    foreach ($filters as $filter) {
      $this
        ->ensure($filter);
    }
  }

  /**
   * Checks that the current collection contains the supplied filter.
   *
   * If the supplied filter is another filter collection, each of its
   * filters will be checked.
   */
  public function ensure(FilterInterface $filter) {
    if ($filter instanceof \Traversable) {
      foreach ($filter as $f) {
        $this
          ->ensure($f);
      }
    }
    elseif (!in_array($filter, $this->filters, true)) {
      $this->filters[] = $filter;
    }
  }
  public function all() {
    return $this->filters;
  }
  public function clear() {
    $this->filters = array();
  }
  public function filterLoad(AssetInterface $asset) {
    foreach ($this->filters as $filter) {
      $filter
        ->filterLoad($asset);
    }
  }
  public function filterDump(AssetInterface $asset) {
    foreach ($this->filters as $filter) {
      $filter
        ->filterDump($asset);
    }
  }
  public function getIterator() {
    return new \ArrayIterator($this->filters);
  }
  public function count() {
    return count($this->filters);
  }

}