Thanks Allison. I will try it. Op maandag 24 oktober 2016 heeft Allison, Timothy B. <talli...@mitre.org> het volgende geschreven:
> Make sure to setRewriteMethod on the MultiTermQuery to: > MultiTermQuery.SCORING_BOOLEAN_REWRITE or CONSTANT_SCORE_BOOLEAN_REWRITE > > Then something like this should work: > > q = q.rewrite(reader); > > Set<Term> terms = new HashSet<>(); > Weight weight = q.createWeight(searcher, false); > > weight.extractTerms(terms); > > > > -----Original Message----- > From: Evert Wagenaar [mailto:evert.wagen...@gmail.com <javascript:;>] > Sent: Monday, October 24, 2016 12:41 PM > To: java-user@lucene.apache.org <javascript:;> > Subject: How to get the terms matching a WildCardQuery in Lucene 6.2? > > I already asked this on StackOverflow. Unfortunately without any answer > for over a week now. > > Therefore again to the real experts: > > > I downloaded a list of 350.000 English words in a .txt file and Indexed it > using the latest Lucene (6.2). I want to apply wildcard queries like > aard???? and then retreive a list of matches. > > I've done this before in an older version of Lucene. Here it was pretty > simple. I just had to do a Query.rewrite() and this retuned what I needed. > Unfortunately in 6.2 this doesn't work anymore. There is a > Query.rewrite(Indexreader reader) which should return a HashMap of Terms. > In my case there's only one matching Term (aardvark). The Searcher returns > one hit, containing the Document path to the wordlist. The HashMap is > however empty. > > When I change the Query to find more then one single match (like aa*) the > HashMap remains empty. > > I tried the MatchExtractor too. Unfortunately without result. > > The Objective of this is to demonstrate the power of Lucene to easily find > words of a particular length, given one or more characters. I'm pretty sure > I can do this using regular expressions in Java but then it's outside my > objective. > > Can anyone tell me why this isn't working? I use the StandardAnalyzer. > Should I use a different Application? > > Any help is greatly appreciated. > > Thanks. > > > > -- > Sent from Gmail IPad > -- Sent from Gmail IPad
