/**
     * this method takes the current $_fields property and makes new object from it
     * this is useful if there is already a result set and you would like to modify the object and use it with the unit of work
     *
     * @access public
     * @return System_Database_Base
     */
    public function makeNew(){
        $class = get_class($this);
        $obj   = new $class;

        return $obj->setValue($this->_fields);
    }