[ http://issues.apache.org/jira/browse/LUCENE-446?page=comments#action_12366302 ]
Kelvin Tan commented on LUCENE-446: ----------------------------------- Yes, I've independently come up with something similar. What's interesting is that you can also perform filtering (like date filtering) by simply returning negative Float.MAX_VALUE. This pretty much guarantees that the document's final score is < 0. I've also come across the need to be able to modify the final score of a document, and have done this via a score-modifying query wrapper which delegates the scoring to the functionquery it wraps, then applying an additional function to it. Is that similar to the product function you mention? > FunctionQuery - score based on field value > ------------------------------------------ > > Key: LUCENE-446 > URL: http://issues.apache.org/jira/browse/LUCENE-446 > Project: Lucene - Java > Type: New Feature > Components: Search > Versions: 1.9 > Reporter: Yonik Seeley > Attachments: function.zip, function.zip > > FunctionQuery can return a score based on a field's value or on it's ordinal > value. > FunctionFactory subclasses define the details of the function. There is > currently a LinearFloatFunction (a line specified by slope and intercept). > Field values are typically obtained from FieldValueSourceFactory. > Implementations include FloatFieldSource, IntFieldSource, and OrdFieldSource. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://issues.apache.org/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
