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https://issues.apache.org/jira/browse/LUCENE-2198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12801442#action_12801442
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Yonik Seeley commented on LUCENE-2198:
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bq. If we start to discuss about such topics, we should not have used
Attributes at all.
Attributes are great for allowing extensions. But for attributes that often
appear together, it seems like we should at least consider bundling them.
You seem to be implying that we shouldn't question the cost of doing things one
way vs another?
bq. There is no additional cost
Surely the native clone() invoked for every additional attribute counts for
something?
bq. Because the State object is build internally before and just cloned. So the
number of attributes vs. the size of the captured states do not affect
performance in neglectible manner.
Not sure I understand... if captureState() is invoked, isn't .clone() called on
each attribute?
> support protected words in Stemming TokenFilters
> ------------------------------------------------
>
> Key: LUCENE-2198
> URL: https://issues.apache.org/jira/browse/LUCENE-2198
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Analysis
> Affects Versions: 3.0
> Reporter: Robert Muir
> Priority: Minor
> Attachments: LUCENE-2198.patch, LUCENE-2198.patch
>
>
> This is from LUCENE-1515
> I propose that all stemming TokenFilters have an 'exclusion set' that
> bypasses any stemming for words in this set.
> Some stemming tokenfilters have this, some do not.
> This would be one way for Karl to implement his new swedish stemmer (as a
> text file of ignore words).
> Additionally, it would remove duplication between lucene and solr, as they
> reimplement snowballfilter since it does not have this functionality.
> Finally, I think this is a pretty common use case, where people want to
> ignore things like proper nouns in the stemming.
> As an alternative design I considered a case where we generalized this to
> CharArrayMap (and ignoring words would mean mapping them to themselves),
> which would also provide a mechanism to override the stemming algorithm. But
> I think this is too expert, could be its own filter, and the only example of
> this i can find is in the Dutch stemmer.
> So I think we should just provide ignore with CharArraySet, but if you feel
> otherwise please comment.
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