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From "Uwe Schindler (JIRA)" <>
Subject [jira] Commented: (LUCENE-1794) implement reusableTokenStream for all contrib analyzers
Date Mon, 10 Aug 2009 14:16:15 GMT


Uwe Schindler commented on LUCENE-1794:

different things need to happen here: for example Thai and Smart Chinese have filters that
keep state and require a reset(). But i don't know, seems like it could be factored into Analyzer
and reset() called on both tokenizer and filters... 

I am trying to imagine a situation where refactoring this kind of thing would prevent some
flexibility, but i think if tokenstreams keep state in some wierd way they should implement
reset() for this purpose.

reset() is always called by IndexWriter before consuming the TokenStream; end() is called
as last operation on the TokenStream.

> implement reusableTokenStream for all contrib analyzers
> -------------------------------------------------------
>                 Key: LUCENE-1794
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/analyzers
>            Reporter: Robert Muir
>            Assignee: Robert Muir
>            Priority: Minor
>             Fix For: 2.9
>         Attachments: LUCENE-1794.patch, LUCENE-1794.patch
> most contrib analyzers do not have an impl for reusableTokenStream
> regardless of how expensive the back compat reflection is for indexing speed, I think
we should do this to mitigate any performance costs. hey, overall it might even be an improvement!
> the back compat code for non-final analyzers is already in place so this is easy money
in my opinion.

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