On Sat, Sep 17, 2011 at 7:19 AM, S Eslamian <seslam...@gmail.com> wrote: > ofcourse I do this. This is my sample cod to get terms: > > > PrefixQuery pq = new PrefixQuery(new Term("field","hell*")); > rewritenQuery = indexSearcher.rewrite(pq); > QueryTermExtractor qte = new QueryTermExtractor(); > WeightedTerm[] wt = qte.getTerms(rewritenQuery ); > > and it returns nothing to me in wt!!!
hmm, (I have to admit I never used QueryTermExtractor) maybe there is no term in the index starting with "hell*" maybe they start with "hell" ? you don't need the asterisk when you create the prefix query directly, no? simon > > On Thu, Sep 15, 2011 at 12:36 PM, Simon Willnauer > <simon.willna...@googlemail.com> wrote: >> >> Hey, >> >> do you use the query you passed to rewrite to extract the terms or the >> query returned from rewrite? >> >> you should do it like this: >> >> Query q = ... >> >> q = indexSearcher.rewrite(q); >> >> ... >> >> simon >> >> On Thu, Sep 15, 2011 at 6:02 AM, S Eslamian <seslam...@gmail.com> wrote: >> > I have an instance of IndexSearcher and then call rewrite method with >> > the >> > query. >> > IndexRear ir = IndexReader.open("directory path",true); >> > IndexSearcher indexSearcher = new IndexSearcher(ir); >> > indexSearcher.rewrite(query); >> > >> > >> > On Wed, Sep 14, 2011 at 10:03 PM, Simon Willnauer >> > <simon.willna...@googlemail.com> wrote: >> >> >> >> how do you rewrite your query? >> >> >> >> simon >> >> >> >> On Tue, Sep 13, 2011 at 9:22 AM, S Eslamian <seslam...@gmail.com> >> >> wrote: >> >> > Hi >> >> > I am using QueryTermExtractor.getTerms for finding the terms of a >> >> > given >> >> > query in lucene 3.0.3. In it's document has said that "Utility class >> >> > used to >> >> > extract the terms used in a query, plus any weights. This class will >> >> > not >> >> > find terms for MultiTermQuery, RangeQuery and PrefixQuery classes so >> >> > the >> >> > caller must pass a rewritten query (see Query.rewrite) to obtain a >> >> > list >> >> > of >> >> > expanded terms.", but for these queries - MultiTermQuery, RangeQuery >> >> > and >> >> > PrefixQuery - even rewritten query, it doesn't return the correct >> >> > list >> >> > of >> >> > expanded terms. >> >> > What should I do? For example for e PrefixQuery like 'hell*' it >> >> > returns >> >> > 'hell*' instead of " 'hell' and 'hello' and ... "; >> >> > >> >> >> >> --------------------------------------------------------------------- >> >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org >> >> For additional commands, e-mail: java-user-h...@lucene.apache.org >> >> >> > >> > > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org