// text no case
else if(sortType.equalsIgnoreCase("textnocase")) comp=new SortRegisterComparator(isAsc,true);
// numeric
else if(sortType.equalsIgnoreCase("numeric")) comp=new NumberSortRegisterComparator(isAsc);
else {
throw new ExpressionException("invalid sort type ["+sortType+"], sort types are [text, textNoCase, numeric]");
}