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From "Sean O'Connor (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-794) SpanScorer and SimpleSpanFragmenter for Contrib Highlighter
Date Wed, 11 Apr 2007 03:58:32 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487981
] 

Sean O'Connor commented on LUCENE-794:
--------------------------------------

Thanks Mark. I had the trunk from a few days ago (perhaps a week), so that was just me being
lazy : -).

Is there anything I should be aware of the: parser.setUseOldRangeQuery(true); in doSearching(String
queryString)? [about  line 890 in SpanHighlighterTest.java]

I've read the javadocs which explain it a bit, but I don't think a understand enough to infer
why you use it in the SpanHighterTest.java. If I can (relatively) safely ignore that, I will.

Sean


Mark Miller (JIRA) wrote:
    [ [1]https://issues.apache.org/jira/browse/LUCENE-794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487860
] 

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: [2]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, 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 [3]http://issues.apache.org/jira/browse/LUCENE-403 for some background.
There is a dependency on MemoryIndex.
    

  

----------------------------------------------------------------------------------------
[1] https://issues.apache.org/jira/browse/LUCENE-794?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12487860
[2] https://issues.apache.org/jira/browse/LUCENE-794
[3] http://issues.apache.org/jira/browse/LUCENE-403


> SpanScorer and SimpleSpanFragmenter for Contrib Highlighter
> -----------------------------------------------------------
>
>                 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, 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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