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https://issues.apache.org/jira/browse/LUCENE-1839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mark Miller resolved LUCENE-1839.
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Resolution: Fixed
r806892
> Scorer.explain is deprecated but abstract, should have impl that throws
> UnsupportedOperationException
> -----------------------------------------------------------------------------------------------------
>
> Key: LUCENE-1839
> URL: https://issues.apache.org/jira/browse/LUCENE-1839
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Search
> Reporter: Tim Smith
> Priority: Minor
> Fix For: 2.9
>
>
> Suggest having Scorer implement explain to throw UnsupportedOperationException
> right now, i have to implement this method (because its abstract), and javac
> yells at me for overriding a deprecated method
> if the following implementation is in Scorer, i can remove my "empty"
> implementations of explain from my Scorers
> {code}
> /** Returns an explanation of the score for a document.
> * <br>When this method is used, the {...@link #next()}, {...@link
> #skipTo(int)} and
> * {...@link #score(HitCollector)} methods should not be used.
> * @param doc The document number for the explanation.
> *
> * @deprecated Please use {...@link IndexSearcher#explain}
> * or {...@link Weight#explain} instead.
> */
> public Explanation explain(int doc) throws IOException {
> throw new UnsupportedOperationException();
> }
> {code}
> best i figure, this shouldn't break back compat (people already have to
> recompile anyway) (2.9 definitely not binary compatible with 2.4)
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