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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Issue Comment Edited: (LUCENE-2090) convert automaton to char[] based processing and TermRef / TermsEnum api
Date Wed, 25 Nov 2009 13:06:39 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2090?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12782409#action_12782409
] 

Michael McCandless edited comment on LUCENE-2090 at 11/25/09 1:06 PM:
----------------------------------------------------------------------

BTW, we've discussed someday having a codec whose terms dict (or maybe just terms index) is
represented as an FST, at which point AutomatonTermsEnum would be an intersection + walk of
two FSTs.  Because suffix's are also shared in the FST, you could more easily (more efficiently)
handle \*XXX cases as well (it'd just be symmetic with the XXX\* cases).

      was (Author: mikemccand):
    BTW, we've discussed someday having a codec whose terms dict (or maybe just terms index)
is represented as an FST, at which point AutomatonTermsEnum would be an intersection + walk
of two FSTs.  Because suffix's are also shared in the FST, you could more easily (more efficiently)
handle *XXX cases as well (it'd just be symmetic with the XXX* cases).
  
> convert automaton to char[] based processing and TermRef / TermsEnum api
> ------------------------------------------------------------------------
>
>                 Key: LUCENE-2090
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2090
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Robert Muir
>            Priority: Minor
>             Fix For: 3.1
>
>         Attachments: LUCENE-2090_TermRef_flex.patch, LUCENE-2090_TermRef_flex2.patch
>
>
> The automaton processing is currently done with String, mostly because TermEnum is based
on String.
> it is easy to change the processing to work with char[], since behind the scenes this
is used anyway.
> in general I think we should make sure char[] based processing is exposed in the automaton
pkg anyway, for things like pattern-based tokenizers and such.

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