* * For the full copyright and license information, please view the LICENSE * file that was distributed with this source code. */ namespace Symfony\Component\Templating\Loader; use Symfony\Component\Templating\Storage\Storage; use Symfony\Component\Templating\TemplateReferenceInterface; /** * ChainLoader is a loader that calls other loaders to load templates. * * @author Fabien Potencier */ class ChainLoader extends Loader { protected $loaders = array(); /** * Constructor. * * @param 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 LoaderInterface $loader A Loader instance */ public function addLoader(LoaderInterface $loader) { $this->loaders[] = $loader; } /** * Loads a template. * * @param TemplateReferenceInterface $template A template * * @return Storage|Boolean false if the template cannot be loaded, a Storage instance otherwise */ public function load(TemplateReferenceInterface $template) { foreach ($this->loaders as $loader) { if (false !== $storage = $loader->load($template)) { return $storage; } } return false; } /** * Returns true if the template is still fresh. * * @param TemplateReferenceInterface $template A template * @param integer $time The last modification time of the cached template (timestamp) * * @return Boolean */ public function isFresh(TemplateReferenceInterface $template, $time) { foreach ($this->loaders as $loader) { return $loader->isFresh($template, $time); } return false; } }