ObjcetNaviNode no = new ObjcetNaviNode();
String pre = "";
if ("".equals(prefix))
pre = "node.";
ParamExtractor pe = Params.makeParamExtractor(req, refer);
for (Object name : pe.keys()) {
String na = (String) name;
if (na.startsWith(prefix)) {
no.put(pre + na, pe.extractor(na));
}
}