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   1  <?php
   2  
   3  /*
   4   * This file is part of the Symfony package.
   5   *
   6   * (c) Fabien Potencier <fabien@symfony.com>
   7   *
   8   * For the full copyright and license information, please view the LICENSE
   9   * file that was distributed with this source code.
  10   */
  11  
  12  namespace Symfony\Component\Config\Loader;
  13  
  14  use Symfony\Component\Config\Exception\FileLoaderLoadException;
  15  
  16  /**
  17   * DelegatingLoader delegates loading to other loaders using a loader resolver.
  18   *
  19   * This loader acts as an array of LoaderInterface objects - each having
  20   * a chance to load a given resource (handled by the resolver)
  21   *
  22   * @author Fabien Potencier <fabien@symfony.com>
  23   */
  24  class DelegatingLoader extends Loader
  25  {
  26      /**
  27       * Constructor.
  28       *
  29       * @param LoaderResolverInterface $resolver A LoaderResolverInterface instance
  30       */
  31      public function __construct(LoaderResolverInterface $resolver)
  32      {
  33          $this->resolver = $resolver;
  34      }
  35  
  36      /**
  37       * {@inheritdoc}
  38       */
  39      public function load($resource, $type = null)
  40      {
  41          if (false === $loader = $this->resolver->resolve($resource, $type)) {
  42              throw new FileLoaderLoadException($resource);
  43          }
  44  
  45          return $loader->load($resource, $type);
  46      }
  47  
  48      /**
  49       * {@inheritdoc}
  50       */
  51      public function supports($resource, $type = null)
  52      {
  53          return false !== $this->resolver->resolve($resource, $type);
  54      }
  55  }