Well, I just didn't want to overload people with too much code.
There is an art to providing just enough detail :)
doc is created like this ("modified" get formated with SimpleDateFormat tformat = new SimpleDateFormat ("yyyyMMddhhmmss") by cashToIndex metod, where the IndexWriter created) :
doc.add(Field.Keyword("modified",DateField.timeToString(modified)));
This looks fine.
formated_query=query.toString();
if (sort_byscore)hits = ms.search(query);
else hits = ms.search(query,new Sort("modified",true));
// here the "cannot determine.." exception generated!!!
How about using:
ms.search(query,
new Sort(new SortField("modified", SortField.STRING, true)));Does that fix it?
If "modified" is only there for sorting and not for querying, perhaps index it as a Integer.toString or Float.toString instead - this will give you better resource usage and performance most likely - and change the type to SortField.INT or SortField.FLOAT appropriately. The sorting infrastructure can detect a type, but it may have issues doing so if the strings look like a number in the first document but later appear like a String. DateField.timeToString makes them String, so forcing it to sort on String type should work.
Erik
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