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https://issues.apache.org/jira/browse/LUCENE-794?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Miller updated LUCENE-794:
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Attachment: spanhighlighter11.patch
Thanks a lot Andy. As I suspected, the issue is that the conversion from
PhraseQuery to SpanQuery is inexact. I have updated the code to handle this
case though. If a PhraseQuery has 0 slop then the created Span query will now
force an inorder match. This should be a nice improvement to the PhraseQuery to
SpanQuery approximation.
Patch with fix and new junit test attached.
patch 11
- Mark
> 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,
> spanhighlighter10.patch, spanhighlighter11.patch, spanhighlighter2.patch,
> spanhighlighter3.patch, spanhighlighter5.patch, spanhighlighter6.patch,
> spanhighlighter7.patch, spanhighlighter8.patch, spanhighlighter9.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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