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From "Mark Miller (JIRA)" <>
Subject [jira] Commented: (LUCENE-794) SpanScorer and SimpleSpanFragmenter for Contrib Highlighter
Date Tue, 10 Apr 2007 18:11:32 GMT


Mark Miller commented on LUCENE-794:

Sorry Sean, I forgot to mention that the patch is off of the latest 
Lucene trunk code.

The range query test should fail because they switched the query parser 
to return a constant score query instead of a range query. Cannot 
highlight a constant score query.

- Mark

> 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,,,,,,
> 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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