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https://issues.apache.org/jira/browse/LUCENE-4285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13470560#comment-13470560
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Robert Muir commented on LUCENE-4285:
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I rather like this: I don't think its common to have an empty FST, its usually
indicative of a bug or misconfiguration.
There is also some code in lucene that uses this return value, e.g.
SynonymFilterFactory, if you give it a file with no actual
synonyms entries it just returns the underlying stream rather than decorating
it with a useless synonyms filter.
> 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
>
> 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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