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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\Definition\Builder;
  13  
  14  /**
  15   * This class builds validation conditions.
  16   *
  17   * @author Christophe Coevoet <stof@notk.org>
  18   */
  19  class ValidationBuilder
  20  {
  21      protected $node;
  22      public $rules = array();
  23  
  24      public function __construct(NodeDefinition $node)
  25      {
  26          $this->node = $node;
  27      }
  28  
  29      /**
  30       * Registers a closure to run as normalization or an expression builder to build it if null is provided.
  31       *
  32       * @return ExprBuilder|$this
  33       */
  34      public function rule(\Closure $closure = null)
  35      {
  36          if (null !== $closure) {
  37              $this->rules[] = $closure;
  38  
  39              return $this;
  40          }
  41  
  42          return $this->rules[] = new ExprBuilder($this->node);
  43      }
  44  }