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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\Resource;
  13  
  14  /**
  15   * ResourceInterface is the interface that must be implemented by all Resource classes.
  16   *
  17   * @author Fabien Potencier <fabien@symfony.com>
  18   */
  19  interface ResourceInterface
  20  {
  21      /**
  22       * Returns a string representation of the Resource.
  23       *
  24       * @return string A string representation of the Resource
  25       */
  26      public function __toString();
  27  
  28      /**
  29       * Returns true if the resource has not been updated since the given timestamp.
  30       *
  31       * @param int $timestamp The last time the resource was loaded
  32       *
  33       * @return bool True if the resource has not been updated, false otherwise
  34       */
  35      public function isFresh($timestamp);
  36  
  37      /**
  38       * Returns the tied resource.
  39       *
  40       * @return mixed The resource
  41       */
  42      public function getResource();
  43  }