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From "Mark Miller (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-794) Extend contrib Highlighter to properly support phrase queries and span queries
Date Tue, 19 Jun 2007 21:26:26 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mark Miller updated LUCENE-794:
-------------------------------

    Attachment: spanhighlighter8.patch


patch version 8 : Apply to root dir of trunk

- Fixed a bug that was caused when a query had the same term multiple times
- Added a unit test for the bug just mentioned
- Improved performance by not converting Querys that are not position sensitive to SpanQuerys.
Non position sensitive Query clauses are treated the same way the standard Scorer would treat
them.
- Some refactoring based on the previous change.
- Improved some of the JavaDoc comments

> Extend contrib Highlighter to properly support phrase queries and span queries
> ------------------------------------------------------------------------------
>
>                 Key: LUCENE-794
>                 URL: https://issues.apache.org/jira/browse/LUCENE-794
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Other
>            Reporter: Mark Miller
>            Priority: Minor
>         Attachments: CachedTokenStream.java, CachedTokenStream.java, CachedTokenStream.java,
DefaultEncoder.java, Encoder.java, Formatter.java, Highlighter.java, Highlighter.java, Highlighter.java,
Highlighter.java, Highlighter.java, HighlighterTest.java, HighlighterTest.java, HighlighterTest.java,
HighlighterTest.java, MemoryIndex.java, QuerySpansExtractor.java, QuerySpansExtractor.java,
QuerySpansExtractor.java, QuerySpansExtractor.java, SimpleFormatter.java, spanhighlighter.patch,
spanhighlighter2.patch, spanhighlighter3.patch, spanhighlighter5.patch, spanhighlighter6.patch,
spanhighlighter7.patch, spanhighlighter8.patch, spanhighlighter_patch_4.zip, SpanHighlighterTest.java,
SpanHighlighterTest.java, SpanScorer.java, SpanScorer.java, WeightedSpanTerm.java
>
>
> 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 http://issues.apache.org/jira/browse/LUCENE-403 for some background.
> There is a dependency on MemoryIndex.

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