Hi Mike, It looks like FunctionValues is a very old API used by many function queries, while DoubleValuesSource is relatively new (introduced in https://issues.apache.org/jira/browse/LUCENE-5325).
This comment ( https://issues.apache.org/jira/browse/LUCENE-5325?focusedCommentId=15235324&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15235324) on the issue seems to refer to wrapper classes to convert between the old and new APIs? I admit the situation is rather confusing; but we've been gradually working on cutting over modules to the new API. Patches welcome! Mike McCandless http://blog.mikemccandless.com On Tue, Oct 10, 2017 at 3:39 PM, Sokolov, Michael <msoko...@gmail.com> wrote: > Hi, I'm trying to implement a complex set of values computed according to > some externally-driven specification, so I am looking at these APIs. My > question is whether there is any way to mix them. I have implemented some > DoubleValuesSources and now I want combine them using sum, max, etc. I > noticed these handy classes over in o.a.l.queries.function.valuesource, > but they seem to be of a different flavor than the DVS API is designed for. > EG DVS is kind of an iterative API while the functions appear to be random > access (you pass them a docid). I could code up my own DVS for functions > like max, sum and so on, but I wonder if there is some kind of adapter, or > at least a reasonable strategy that would let one mix these apis? > > -Mike > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
