Hi, there is no need to extend Lucene's QueryParser. Lucene by itself does not need a Query Parser at all and it does not use it, it is just a convenience class. If you have worked with Antlr to generate a grammar, just use it and build the final org.apache.lucene.search.Query in your code.
Uwe ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Carsten Schnober [mailto:schno...@ids-mannheim.de] > Sent: Monday, January 28, 2013 4:44 PM > To: java-user > Subject: Custom Query Syntax/Parser > > Hi, > for our project, we have to implement a custom query language that does > have much in common with the built-in Lucene query language. We have a > formal grammar for that language, formalized with Antlr. > > I am not sure about the best way to build/generate a Lucene-based > QueryParser object that is pluggable into our project because some of the > query language's properties refer to information we have stored in payloads, > i.e. require SpanQueries. Unfortunately, it is not as simple as calling a > SpanTermQuery because we would like to allows queries for e.g. tokens that > have the same payload, but not specified in advance. > > Ideally, I would like to apply a typical Lucene query processing step as in: > StandardQueryParser parser = new StandardQueryParser(new > WhitespaceAnalyzer(Version.LUCENE_40)); > Query q = parser.parse("text", query); > > From that point of view, the only change should be CustomParser parser = > new CustomParser(...); > > Unfortunately, I couldn't find much documentation on that. The "Lucene in > Action" textbook refers to building custom query parsers with Antlr or > JavaCC, but does not go into any details. The Lucene query syntax definition > in JavaCC would probably be a valuable source, but going through that is very > tedious. That is why I would like to know whether you might know of a > tutorial or less complex examples. > > Thank you very much! > Carsten Schnober > > -- > Institut für Deutsche Sprache | http://www.ids-mannheim.de > Projekt KorAP | http://korap.ids-mannheim.de > Tel. +49-(0)621-43740789 | schno...@ids-mannheim.de > Korpusanalyseplattform der nächsten Generation Next Generation Corpus > Analysis Platform > > --------------------------------------------------------------------- > 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
