<?php

/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * 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@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Hex.php 8064 2008-02-16 10:58:39Z thomas $
 */

/**
 * @see Zend_Validate_Abstract
 */
require_once 'external/Zend/Validate/Abstract.php';

/**
 * @category   Zend
 * @package    Zend_Validate
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Validate_Hex extends Zend_Validate_Abstract {
  /**
   * Validation failure message key for when the value contains characters other than hexadecimal digits
   */
  const NOT_HEX = 'notHex';
  
  /**
   * Validation failure message template definitions
   *
   * @var array
   */
  protected $_messageTemplates = array(self::NOT_HEX => "'%value%' has not only hexadecimal digit characters");

  /**
   * Defined by Zend_Validate_Interface
   *
   * Returns true if and only if $value contains only hexadecimal digit characters
   *
   * @param  string $value
   * @return boolean
   */
  public function isValid($value) {
    $valueString = (string)$value;
    
    $this->_setValue($valueString);
    
    if (! ctype_xdigit($valueString)) {
      $this->_error();
      return false;
    }
    
    return true;
  }

}
