<?php
 
 /*
  * This file is part of the Symfony package.
  *
  * (c) Fabien Potencier <fabien@symfony.com>
  *
  * For the full copyright and license information, please view the LICENSE
  * file that was distributed with this source code.
  */
 
 namespace Symfony\Component\Translation\Loader;
 
 use Symfony\Component\Translation\Exception\InvalidResourceException;
 use Symfony\Component\Translation\Exception\LogicException;
 use Symfony\Component\Yaml\Exception\ParseException;
 use Symfony\Component\Yaml\Parser as YamlParser;
 use Symfony\Component\Yaml\Yaml;
 
 /**
  * YamlFileLoader loads translations from Yaml files.
  *
  * @author Fabien Potencier <fabien@symfony.com>
  */
 class YamlFileLoader extends FileLoader
 {
     private $yamlParser;
 
     /**
      * {@inheritdoc}
      */
     protected function loadResource($resource)
     {
         if (null === $this->yamlParser) {
             if (!class_exists('Symfony\Component\Yaml\Parser')) {
                 throw new LogicException('Loading translations from the YAML format requires the Symfony Yaml component.');
             }
 
             $this->yamlParser = new YamlParser();
         }
 
         try {
             $messages = $this->yamlParser->parseFile($resource, Yaml::PARSE_CONSTANT);
         } catch (ParseException $e) {
             throw new InvalidResourceException(sprintf('Error parsing YAML, invalid file "%s"', $resource), 0, $e);
         }
 
         return $messages;
     }
 }