Hi Aviran,
The code you are calling assumes that you have indexed with TermVector support for
offsets (and optionally positions) ie code like this:
doc.add(new Field("contents", content,
Field.Store.COMPRESS, Field.Index.TOKENIZED,
Field.TermVector.WITH_POSITIONS_OFFSETS));
If you haven't stored offsets then the getTermFreqVector method returns a
TermFreqVector rather than the TermPositionVector subclass, hence the class cast
exception. I should tighten up that section of code to check for this situation and
throw an exception with a suitable message.
By the way, the "getAnyTokenStream" method is coded a little more defensively and will
silently drop back to re-analyzing (parsing) the original content if it is asked to
get a TokenStream for a field that doesnt have offset data stored. This is probably
the safest way to code your app and the cost of the logic which checks the field
storage type is minimal.
Cheers
Mark
---------------------------------
ALL-NEW Yahoo! Messenger - all new features - even more fun!
