<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magento.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magento.com for more information.
 *
 * @category    Mage
 * @package     Mage_Catalog
 * @copyright  Copyright (c) 2006-2015 X.commerce, Inc. (http://www.magento.com)
 * @license    http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */


/**
 * Catalog product SKU backend attribute model
 *
 * @category   Mage
 * @package    Mage_Catalog
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Catalog_Model_Product_Attribute_Backend_Sku extends Mage_Eav_Model_Entity_Attribute_Backend_Abstract
{
    /**
     * Maximum SKU string length
     *
     * @var string
     */
    const SKU_MAX_LENGTH = 64;

    /**
     * Validate SKU
     *
     * @param Mage_Catalog_Model_Product $object
     * @throws Mage_Core_Exception
     * @return bool
     */
    public function validate($object)
    {
        $helper = Mage::helper('core/string');

        if ($helper->strlen($object->getSku()) > self::SKU_MAX_LENGTH) {
            Mage::throwException(
                Mage::helper('catalog')->__('SKU length should be %s characters maximum.', self::SKU_MAX_LENGTH)
            );
        }
        return parent::validate($object);
    }
}
