Thanks Chis. After spending half a day to "really" look into FunctionQuery (and related classes), and re-reading about Weight and Scorer. I think I am beginning to understand a bit. But more questions.
(1) Should values returned by DocValues (return from ValueSource) must always betwen 1.0 and 0.0 ? How is this value affect the overall document scores, assuming there are others Query clauses as well that is perform on the document (on other fields). (2) The documentation on the following functions is extremely lacking (no matter where I looked). Any expert here can help out ? -- Weight.getValue() : what values should be returned for NumberProximityQuery? -- Weight.sumOfSquareWeights() : no idea what is this for??? -- Weight.normalize() : still no idea -- Scorer.score() : should this value always between 1.0 and 0.0 ? Thanks. ~KEGan On 10/4/06, Chris Hostetter <[EMAIL PROTECTED]> wrote:
: >From my searches, there seems to be a FunctionQuery in Solr that can do this : type of query. But I am using pure Lucene, and trying to port Solr code over : (to create my own version of FunctionQuery) looks too complicated because of : code dependency on other Solr code such as ValueSource, etc. ValueSource isn't relaly "other Solr code" .. it's an inherient part of FunctionQuery (hence it's in the same package). You should be able to use everything in the org.apache.solr.search.function package as is without any other Solr code. : I have also search on how to write my own query instance, but there is lack : of documentation on doing so. The formula to calculate the number proximity : is quite trivial. But how to stitch together Query, Weight, Scorer is the : problem :( Check out the package documentation for org.apache.lucene.search, particularly section #3 "Changing the Scoring" ... http://lucene.apache.org/java/docs/api/org/apache/lucene/search/package-summary.html#scoring -Hoss --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
