protected function _getComponentId($select)
    {
        $componentId = null;
        if ($select) {
            if ($select->getPart(Kwf_Model_Select::WHERE_EQUALS)) {
                foreach ($select->getPart(Kwf_Model_Select::WHERE_EQUALS) as $k=>$i) {
                    if ($k == 'component_id') $componentId = $i;
                }
            }
        }
        return $componentId;
    }