<?php
/**
 * 
 * Validates that this value is not equal to some other element in the filter 
 * chain (note that equality is *not* strict, so type does not matter).
 * 
 * @category Solar
 * 
 * @package Solar_Filter
 * 
 * @author Paul M. Jones <hide@address.com>
 * 
 * @license http://opensource.org/licenses/bsd-license.php BSD
 * 
 * @version $Id: ValidateNotEquals.php 4272 2009-12-17 21:56:32Z pmjones $
 * 
 */
class Solar_Filter_ValidateNotEquals extends Solar_Filter_Abstract
{
    /**
     * 
     * Validates that this value is not equal to some other element in the 
     * filter chain (note that equality is *not* strict, so type does not 
     * matter).
     * 
     * If the other element does not exist in $this->_data, the validation
     * will *fail*.
     * 
     * @param mixed $value The value to validate.
     * 
     * @param string $other_key Check against the value of this element in
     * $this->_data.
     * 
     * @return bool True if the values are not equal, false if equal.
     * 
     */
    public function validateNotEquals($value, $other_key)
    {
        if (! $this->_filter->dataKeyExists($other_key)) {
            return false;
        }
        
        $other = $this->_filter->getData($other_key);
        return $value != $other;
    }
}