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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;
  23  
  24      /**
  25       * Constructor.
  26       *
  27       * @param NodeDefinition $node The related node
  28       */
  29      public function __construct(NodeDefinition $node)
  30      {
  31          $this->node = $node;
  32  
  33          $this->rules = array();
  34      }
  35  
  36      /**
  37       * Registers a closure to run as normalization or an expression builder to build it if null is provided.
  38       *
  39       * @param \Closure $closure
  40       *
  41       * @return ExprBuilder|ValidationBuilder
  42       */
  43      public function rule(\Closure $closure = null)
  44      {
  45          if (null !== $closure) {
  46              $this->rules[] = $closure;
  47  
  48              return $this;
  49          }
  50  
  51          return $this->rules[] = new ExprBuilder($this->node);
  52      }
  53  }