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https://issues.apache.org/jira/browse/LUCENE-4825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600667#comment-13600667
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Robert Muir commented on LUCENE-4825:
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I think making this pluggable for that is more like making an apple
subclassable to be an orange. Thats why i recommend just a different
highlighter with a design to fit. This one focuses on summarizing the document
relevant to the individual query terms and the API reflects that.
We dont need to have a one-size-fits-all solution, we can have choices.
> PostingsHighlighter support for positional queries
> --------------------------------------------------
>
> Key: LUCENE-4825
> URL: https://issues.apache.org/jira/browse/LUCENE-4825
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/highlighter
> Affects Versions: 4.2
> Reporter: Luca Cavanna
>
> I've been playing around with the brand new PostingsHighlighter. I'm really
> happy with the result in terms of quality of the snippets and performance.
> On the other hand, I noticed it doesn't support positional queries. If you
> make a span query, for example, all the single terms will be highlighted,
> even though they haven't contributed to the match. That reminds me of the
> difference between the QueryTermScorer and the QueryScorer (using the
> standard Highlighter).
> I've been trying to adapt what the QueryScorer does, especially the
> extraction of the query terms together with their positions (what
> WeightedSpanTermExtractor does). Next step would be to take that information
> into account within the formatter and highlight only the terms that actually
> contributed to the match. I'm not quite ready yet with a patch to contribute
> this back, but I certainly intend to do so. That's why I opened the issue and
> in the meantime I would like to hear what you guys think about it and
> discuss how best we can fix it. I think it would be a big improvement for
> this new highlighter, which is already great!
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