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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-1058) New Analyzer for buffering tokens
Date Tue, 20 Nov 2007 22:11:43 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1058?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12544096
] 

Michael McCandless commented on LUCENE-1058:
--------------------------------------------

I think the discussion in LUCENE-1063 is relevant to this issue: if you store (& re-use)
Tokens you may need to return a copy of the Token from the next() method to ensure that nay
filters that alter the Token don't mess up your private copy.

> New Analyzer for buffering tokens
> ---------------------------------
>
>                 Key: LUCENE-1058
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1058
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Analysis
>            Reporter: Grant Ingersoll
>            Assignee: Grant Ingersoll
>            Priority: Minor
>         Attachments: LUCENE-1058.patch
>
>
> In some cases, it would be handy to have Analyzer/Tokenizer/TokenFilters that could siphon
off certain tokens and store them in a buffer to be used later in the processing pipeline.
> For example, if you want to have two fields, one lowercased and one not, but all the
other analysis is the same, then you could save off the tokens to be output for a different
field.
> Patch to follow, but I am still not sure about a couple of things, mostly how it plays
with the new reuse API.
> See http://www.gossamer-threads.com/lists/lucene/java-dev/54397?search_string=BufferingAnalyzer;#54397

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