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https://issues.apache.org/jira/browse/LUCENE-2309?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12844214#action_12844214
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Shai Erera commented on LUCENE-2309:
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Today when I "ant test-core" contrib is not built, and I like it. Also "ant
test-backwards" will be affected I think ... I think if core does not depend on
contrib, its tests shouldn't also. It's weird if it will.
> Fully decouple IndexWriter from analyzers
> -----------------------------------------
>
> Key: LUCENE-2309
> URL: https://issues.apache.org/jira/browse/LUCENE-2309
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Index
> Reporter: Michael McCandless
>
> IndexWriter only needs an AttributeSource to do indexing.
> Yet, today, it interacts with Field instances, holds a private
> analyzers, invokes analyzer.reusableTokenStream, has to deal with a
> wide variety (it's not analyzed; it is analyzed but it's a Reader,
> String; it's pre-analyzed).
> I'd like to have IW only interact with attr sources that already
> arrived with the fields. This would be a powerful decoupling -- it
> means others are free to make their own attr sources.
> They need not even use any of Lucene's analysis impls; eg they can
> integrate to other things like [OpenPipeline|http://www.openpipeline.org].
> Or make something completely custom.
> LUCENE-2302 is already a big step towards this: it makes IW agnostic
> about which attr is "the term", and only requires that it provide a
> BytesRef (for flex).
> Then I think LUCENE-2308 would get us most of the remaining way -- ie, if the
> FieldType knows the analyzer to use, then we could simply create a
> getAttrSource() method (say) on it and move all the logic IW has today
> onto there. (We'd still need existing IW code for back-compat).
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