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From "Mark Miller (JIRA)" <>
Subject [jira] Updated: (LUCENE-794) Extend contrib Highlighter to properly support phrase queries and span queries
Date Fri, 27 Jul 2007 01:35:04 GMT


Mark Miller updated LUCENE-794:

    Attachment: spanhighlighter10.patch

Requested changes have been made. Only relevant file now is spanhighlighter10.patch.

This is a parallel uses all of the current Highlighter classes. Really,
it is just a new Scorer implementation that scores position sensitive queries based on correct
positions for a hit.

The whole approach was radically changed from the StringBuilder version, so all code is still
Java 1.4 compatible.

I have been using this extensively with great success for a few months now.

> Extend contrib Highlighter to properly support phrase queries and span queries
> ------------------------------------------------------------------------------
>                 Key: LUCENE-794
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Other
>            Reporter: Mark Miller
>            Priority: Minor
>         Attachments:,,,,,,,,,,,,,,,,,,,,, spanhighlighter.patch,
spanhighlighter10.patch, spanhighlighter2.patch, spanhighlighter3.patch, spanhighlighter5.patch,
spanhighlighter6.patch, spanhighlighter7.patch, spanhighlighter8.patch, spanhighlighter9.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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