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https://issues.apache.org/jira/browse/LUCENE-4285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-4285:
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Attachment: LUCENE-4285.patch
Patch, showing how we could use non-final-end-start arcs to do this: I
just added a static Builder.getEmptyFST method.
I think it's actually useful for Builder.finish to return null when
nothing was added: it conveys information (and returning empty FST
would mask that). EG SynonymFilterFactory uses this to bypass
inserting a do-nothing (slowly) SynonymFilter.
> Improve FST API usability for mere mortals
> ------------------------------------------
>
> Key: LUCENE-4285
> URL: https://issues.apache.org/jira/browse/LUCENE-4285
> Project: Lucene - Core
> Issue Type: Improvement
> Components: core/FSTs
> Reporter: David Smiley
> Attachments: LUCENE-4285.patch
>
>
> FST technology is something that has brought amazing advances to Lucene, yet
> the API is hard to use for the vast majority of users like me. I know that
> performance of FSTs is really important, but surely a lot can be done without
> sacrificing that.
> (comments will hold specific ideas and problems)
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