<?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\Config\Definition\Builder;

/**

 * This class builds validation conditions.

 *

 * @author Christophe Coevoet <stof@notk.org>

 */

class ValidationBuilder

{

    protected $node;

    public $rules;

    /**

     * Constructor

     *

     * @param NodeDefinition $node The related node

     */

    public function __construct(NodeDefinition $node)

    {

        $this->node = $node;

        $this->rules = array();

    }

    /**

     * Registers a closure to run as normalization or an expression builder to build it if null is provided.

     *

     * @param \Closure $closure

     *

     * @return ExprBuilder|ValidationBuilder

     */

    public function rule(\Closure $closure = null)

    {

        if (null !== $closure) {

            $this->rules[] = $closure;

            return $this;

        }

        return $this->rules[] = new ExprBuilder($this->node);

    }

}