@Override
 public HttpHandler.State getFieldValue(String fieldStringValue) {
   if (fieldStringValue == null) return null;
   return HttpHandler.State.valueOf(fieldStringValue);
 }
 @Override
 public Object fieldValue2ColumnValue(HttpHandler.State fieldValue) {
   return fieldValue.value();
 }
 @Override
 public HttpHandler.State getFieldValue(Cursor cursor, int index) {
   return HttpHandler.State.valueOf(cursor.getInt(index));
 }