On 04/30/2008 at 12:50 PM, Steven A Rowe wrote: > Caveat: I don't speak, read, write, or dream in Farsi - I > just know that it mostly shares its orthography with Arabic, > and that they are both written and read right-to-left. > > How are you constructing the queries? Using QueryParser? If > so, then I suspect the problem is that you intend the range > you supply to be read entirely right-to-left, but Lucene > instead reads it left-to-right. Have you tried using e.g. > "د-ژ" instead of "د-ژ"? (That is, placing the lower valued > term on the left instead of the right.)
Sigh - can't edit RTL text - the example should be (hoping it doesn't get reversed again): "ژ-د" instead of "د-ژ" (reversing the order of the lower and upper terms) > AFAICT, RangeFilter (called from ConstantScoreRangeQuery, > which is called from QueryParser) does not test whether > lowerTerm is in fact lower than upperTerm. If it turns out > that the problem is simply one of order, it might make sense > to modify RangeFilter so that it flip them when lowerTerm > upperTerm. > > Steve > > On 04/30/2008 at 3:21 AM, esra wrote: > > > > hi, > > > > i am using lucene's "IndexSearcher" to search the given xml > > by keyword which > > contains farsi information. > > while searching i use ranges like > > > > آ-ث | ج-خ | د-ژ | س-ظ | ع-ق | ک-ل | م-ی > > > > when i do search for "د-ژ" range the results are wrong , > > they are the > > results of " س-ظ "range. > > > > for example when i do search for "د-ژ" one of the the > > results is "ساب ووفر" > > , this result also shown on the " س-ظ " range's result list > > which is the > > corret range. > > > > As IndexSearcher use "compareTo" method and this method uses > > unicodes for > > comparing, i found the unicodes of the characters. > > > > د=U+62F > > ژ = U+698 > > and the first letter of "ساب ووفر " is س = U+633 > > > > Do you have any idea how to solve this problem, there are analyzers for > > different languages , will this be usefull if so do you know where to > > find a farsi analyzer? > > > > I would bu glad if you help. > > > > thanks , > > > > Esra
