class Twig_Loader_Chain in Zircon Profile 8

Loads templates from other loaders.

@author Fabien Potencier <[e-mail]>

Hierarchy

• class \Twig_Loader_Chain implements Twig_ExistsLoaderInterface, Twig_LoaderInterface

1 string reference to 'Twig_Loader_Chain'

core.services.yml in core/core.services.yml

core/core.services.yml

1 service uses Twig_Loader_Chain

twig.loader in core/core.services.yml

Twig_Loader_Chain

File

vendor/twig/twig/lib/Twig/Loader/Chain.php, line 17

class Twig_Loader_Chain implements Twig_LoaderInterface, Twig_ExistsLoaderInterface {
  private $hasSourceCache = array();
  protected $loaders = array();

  /**
   * Constructor.
   *
   * @param Twig_LoaderInterface[] $loaders An array of loader instances
   */
  public function __construct(array $loaders = array()) {
    foreach ($loaders as $loader) {
      $this
        ->addLoader($loader);
    }
  }

  /**
   * Adds a loader instance.
   *
   * @param Twig_LoaderInterface $loader A Loader instance
   */
  public function addLoader(Twig_LoaderInterface $loader) {
    $this->loaders[] = $loader;
    $this->hasSourceCache = array();
  }

  /**
   * {@inheritdoc}
   */
  public function getSource($name) {
    $exceptions = array();
    foreach ($this->loaders as $loader) {
      if ($loader instanceof Twig_ExistsLoaderInterface && !$loader
        ->exists($name)) {
        continue;
      }
      try {
        return $loader
          ->getSource($name);
      } catch (Twig_Error_Loader $e) {
        $exceptions[] = $e
          ->getMessage();
      }
    }
    throw new Twig_Error_Loader(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' (' . implode(', ', $exceptions) . ')' : ''));
  }

  /**
   * {@inheritdoc}
   */
  public function exists($name) {
    $name = (string) $name;
    if (isset($this->hasSourceCache[$name])) {
      return $this->hasSourceCache[$name];
    }
    foreach ($this->loaders as $loader) {
      if ($loader instanceof Twig_ExistsLoaderInterface) {
        if ($loader
          ->exists($name)) {
          return $this->hasSourceCache[$name] = true;
        }
        continue;
      }
      try {
        $loader
          ->getSource($name);
        return $this->hasSourceCache[$name] = true;
      } catch (Twig_Error_Loader $e) {
      }
    }
    return $this->hasSourceCache[$name] = false;
  }

  /**
   * {@inheritdoc}
   */
  public function getCacheKey($name) {
    $exceptions = array();
    foreach ($this->loaders as $loader) {
      if ($loader instanceof Twig_ExistsLoaderInterface && !$loader
        ->exists($name)) {
        continue;
      }
      try {
        return $loader
          ->getCacheKey($name);
      } catch (Twig_Error_Loader $e) {
        $exceptions[] = get_class($loader) . ': ' . $e
          ->getMessage();
      }
    }
    throw new Twig_Error_Loader(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' (' . implode(', ', $exceptions) . ')' : ''));
  }

  /**
   * {@inheritdoc}
   */
  public function isFresh($name, $time) {
    $exceptions = array();
    foreach ($this->loaders as $loader) {
      if ($loader instanceof Twig_ExistsLoaderInterface && !$loader
        ->exists($name)) {
        continue;
      }
      try {
        return $loader
          ->isFresh($name, $time);
      } catch (Twig_Error_Loader $e) {
        $exceptions[] = get_class($loader) . ': ' . $e
          ->getMessage();
      }
    }
    throw new Twig_Error_Loader(sprintf('Template "%s" is not defined%s.', $name, $exceptions ? ' (' . implode(', ', $exceptions) . ')' : ''));
  }

}

Members

Name	Modifiers	Type	Description	Overrides
Twig_Loader_Chain::$hasSourceCache	private	property
Twig_Loader_Chain::$loaders	protected	property
Twig_Loader_Chain::addLoader	public	function	Adds a loader instance.
Twig_Loader_Chain::exists	public	function	Check if we have the source code of a template, given its name. Overrides Twig_ExistsLoaderInterface::exists
Twig_Loader_Chain::getCacheKey	public	function	Gets the cache key to use for the cache for a given template name. Overrides Twig_LoaderInterface::getCacheKey
Twig_Loader_Chain::getSource	public	function	Gets the source code of a template, given its name. Overrides Twig_LoaderInterface::getSource
Twig_Loader_Chain::isFresh	public	function	Returns true if the template is still fresh. Overrides Twig_LoaderInterface::isFresh
Twig_Loader_Chain::__construct	public	function	Constructor.