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https://issues.apache.org/jira/browse/LUCENE-8273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16477116#comment-16477116
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Alan Woodward commented on LUCENE-8273:
---------------------------------------
There's a bug in the way that tokens are buffered if the wrapped TokenFilter
needs to read ahead. I'm working on a fix for that now.
TestRandomChains has found quite a few problems with this, I'm tempted to back
it out and work on a branch for a while as it's clearly not ready for release
yet.
> Add a ConditionalTokenFilter
> ----------------------------
>
> Key: LUCENE-8273
> URL: https://issues.apache.org/jira/browse/LUCENE-8273
> Project: Lucene - Core
> Issue Type: New Feature
> Reporter: Alan Woodward
> Assignee: Alan Woodward
> Priority: Major
> Fix For: 7.4
>
> Attachments: LUCENE-8273-part2.patch, LUCENE-8273.patch,
> LUCENE-8273.patch, LUCENE-8273.patch, LUCENE-8273.patch, LUCENE-8273.patch,
> LUCENE-8273.patch, LUCENE-8273.patch, LUCENE-8273.patch
>
>
> Spinoff of LUCENE-8265. It would be useful to be able to wrap a TokenFilter
> in such a way that it could optionally be bypassed based on the current state
> of the TokenStream. This could be used to, for example, only apply
> WordDelimiterFilter to terms that contain hyphens.
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