Hi all,
I hope someone can enlighten me. I am trying to figure out how spatial searches are to be implemented with Lucene. From walking through mailing lists and various web pages, looking at the JavaDoc and source code, I understand how the tiers work and how the search is limited by a special term query containing the ID(s) of the relevant grid cells.
However, it still puzzles me how, where and when the final distance filtering takes place. I see three possibilities: the "Filter" class, the "ValueSourceQuery" or the use of a subclass of "Collector". With my limited understanding of the inner working of Lucene, it seems to me that the first two ways more or less operate on the whole document set, i.e. prior to the moment where the term query for the tiers comes into effect, rendering it useless. The "Collector" approach seems to be much more appropriate, but additionally to the decision whether the document meets the distance condition or not, I would like to have different scores depending on the distance (lower score for larger distances). Originally I thought that the solution would be some kind of subclass of "Query", but haven't seen any hints pointing in this direction and I don't know whether I am able to implement that on my own. I fear that I completely misunderstand something. Thanks in advance for any hints.
Regards, Klaus --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
