No, I do not mean parsing a query string. There is a separate parser that parses the full XQuery language of which full-text searching is a small part. The parser builds an AST. It will then be my job to walk the AST and look for full-text query nodes. I then convert those into a Query object by using the various query classes, e.g., SpanQuery. Hence, I would not be using the built-in CLucene QueryParser.
What I want to know is if the framework for CLucene is expressive enough to be able to handle the criteria I listed below. To elaborate: will I be able to construct/perform queries that: + have a word or phrase that occurs at least/most N times + can use or not use stop-words on a query-by-query basis + can use wildcards + can be case-sensitive or insensitive + can be diacritical-mark-sensitive or insensitive + can keep track of things like sentences and paragraphs Yes, I am willing to write my own derived classes. Also, I thought of another question: can I implement my own index input/output classes so that CLucene stores/retrieves its index data using a mechanism of my choice? I.e., if I didn't want to use the binary index files that CLucene normally creates but instead wanted to store the data inside blobs in a SQL database, could I by writing my own classes to do that? - Paul On Jan 5, 2010, at 11:43 AM, Itamar Syn-Hershko wrote: > Hi Paul, > > What do you mean by that? > > CLucene should be handed with a Query object to perform a search, which > could then be filtered using a Filter object (this to allow for more complex > searches). Producing a Query object from a plain-text string is done by > using a QueryParser; a default one comes with CLucene itself, but anyone can > implement his own should the need arise. Same goes for Queries and Filters - > you can create your own derived class to perform searches the way you want. > > So if by "hand-coded" you mean creating your own classes, then yes, it can. > > Itamar. > > -----Original Message----- > From: Paul J. Lucas [mailto:p...@lucasmail.org] > Sent: Monday, January 04, 2010 10:20 PM > To: clucene-developers@lists.sourceforge.net > Subject: [CLucene-dev] Using CLucene to implement XQuery full-text search > > Hi - > > I'm looking at CLucene to implement the full-text search feature of XQuery: > > http://www.w3.org/TR/xpath-full-text-10/ > > Its query abilities are the most complicated I've seen. Specifically, it > allows one specify the following as part of a query: > > + occurs at {least|most} {N} times > + {with|without} stop words > + {with|without} wildcards > + case sensitive | lowercase | uppercase diacritics insensitive > + {same|different} {sentence|paragraph} at {start|end} | entire content > > Can CLucene do all that if the queries are hand-coded? Thanks. > > - Paul ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ CLucene-developers mailing list CLucene-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/clucene-developers
