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From "Chris Male (JIRA)" <>
Subject [jira] [Commented] (LUCENE-4412) Reconsider FunctionValues / ValueSource API
Date Sun, 23 Sep 2012 05:04:07 GMT


Chris Male commented on LUCENE-4412:

One of the big challenges for this API is the issue of multiple-values.  Applying a function
to two lots of multiple-values is different as you begin to run into order problems and issue
of what to do when the cardinalities are different.
> Reconsider FunctionValues / ValueSource API
> -------------------------------------------
>                 Key: LUCENE-4412
>                 URL:
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/other
>            Reporter: Chris Male
>             Fix For: 5.0
> When documenting a lot of these classes today I found myself confused and it isn't the
first time with this API.  
> I think we need to step back and reassess what we want from this API, what use cases
its designed to meet, and redesign it from the ground up.

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