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From "Michael Busch (JIRA)" <>
Subject [jira] Commented: (LUCENE-794) SpanScorer and SimpleSpanFragmenter for Contrib Highlighter
Date Tue, 29 May 2007 00:43:15 GMT


Michael Busch commented on LUCENE-794:

Hi Mark,

I don't know the details of your patch. I just saw your class 
CachedTokenStream and was wondering if you're aware of 
the new class CachingTokenFilter in the analysis package?
Maybe you could use that?

> SpanScorer and SimpleSpanFragmenter for Contrib Highlighter
> -----------------------------------------------------------
>                 Key: LUCENE-794
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Other
>            Reporter: Mark Miller
>            Priority: Minor
>         Attachments:,,,,,,,,,,,,,,,,,,,,, spanhighlighter.patch,
spanhighlighter2.patch, spanhighlighter3.patch, spanhighlighter5.patch, spanhighlighter6.patch,,,,,,
> This patch adds a new Scorer class (SpanQueryScorer) to the Highlighter package that
scores just like QueryScorer, but scores a 0 for Terms that did not cause the Query hit. This
gives 'actual' hit highlighting for the range of SpanQuerys and PhraseQuery. There is also
a new Fragmenter that attempts to fragment without breaking up Spans.
> See for some background.
> There is a dependency on MemoryIndex.

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