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From "Shai Erera (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1794) implement reusableTokenStream for all contrib analyzers
Date Mon, 10 Aug 2009 15:52:14 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12741386#action_12741386
] 

Shai Erera commented on LUCENE-1794:
------------------------------------

I actually meant to pull the class SavedStreams up to Analyzer, and leave the rest of the
logic in each Analyzer impl (I don't think there can be a default impl for all). SavedStreams
have a Tokenizer and TokenFilter, which is what every reusable token stream needs.

As for PerFieldAnalyzerWrapper --> it will still have a reusableTS(field) version to call.
But when you call this method, you guarantee you reuse a TS for that field only.

But if IW needs to call this method for every field it parses, then it can only call reusableTokenStream(field),
and therefore I wonder how that optimization work ...

> implement reusableTokenStream for all contrib analyzers
> -------------------------------------------------------
>
>                 Key: LUCENE-1794
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1794
>             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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