Hi, perhaps there is someone, who's trying to do the same thing so I just write down, how I got along with this problem. It is NOT the most elegant solution, but it works for me. I don't really know yet, how the performance of my search will be, but the tests look so far ok.
For my phrase search I actually used the SpnQuery - I read that the QueryParser cant't handle this kind of queries so I do it manually by checking, if the user entered the search text within the " ". Handling a SpanQuery one have an access to the query spans - and the spans give you the start and the end position of the searched words. Furthermore I could find the positions and the offset information of the WeightedTerms by using : QueryTermExtractor.getIdfWeightedTerms(...) and TermPositionVector Because there is no possibility (or none that I know of) of getting the offset information if you know the terms positions, I thought of saving all the term positions and the term offset informations.. and since I get the span start- and end-position from a SpanQuery I can look up in the terms positions-array, at which index/place in the array I find the position I got from the SpanQuery and then go to my array with terms offset information and get the one at the same index/position in this array... With those informations I can get the start offset of the first term in the SpanQuery and the end offset of the last term - and I can highlight those continuous. That is really not the best way to process, but I couldn't find any better. Please let me know, if there is any other (better) way to do it. On Fri, Jan 28, 2011 at 4:41 PM, Karolina Bernat < [email protected]> wrote: > Hello, > > since I moved on with my offset-info problem in HTML files, I got a new one > trying to bring the tokens positions information together with tokens/term > offset information. Can someone tell me, how can I get a token, if I know > its position? It would be nice to get the tokens position from the Token > class, but I could only get the positionIncrement, which is not really > helpful.. > > What I'm actually trying to do, is to find the offset information of a > span/phrase query. I know, that the contrib highligter can highlight phrase > queries, but I want/need to do it one my own (or rather give the information > to another application, that does the highlighting of my documents). I also > couldn't really understand, how does the highlighter recognize, that the > individual tokens/terms belong to the phrase (i.e. if I search for "peter > pan" at the moment I also get the tokens 'peter' and 'pan' as weighted > terms, also if they occur individually). > > Thanks so much in advance! > Karolina > >
