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https://issues.apache.org/jira/browse/LUCENE-1748?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12731940#action_12731940
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Hugh Cayless edited comment on LUCENE-1748 at 7/16/09 6:43 AM:
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Ah. I figured it would be something like that. Yes, if abstract isn't
possible, an UnsupportedOperationException would at least get closer to the
source of the problem.
>From my perspective at least, backwards compatibility is already broken, since
>Lucene doesn't work with SpanQuerys that don't implement getPayloadSpans--but
>I understand y'all will have different requirements in this regard.
was (Author: hcayless):
Ah. I figured it would be something like that. Yes, if abstract isn't
possible, an UnsupportedOperationException would at least get closer to the
source of the problem.
> getPayloadSpans on org.apache.lucene.search.spans.SpanQuery should be abstract
> ------------------------------------------------------------------------------
>
> Key: LUCENE-1748
> URL: https://issues.apache.org/jira/browse/LUCENE-1748
> Project: Lucene - Java
> Issue Type: Bug
> Components: Query/Scoring
> Affects Versions: 2.4, 2.4.1
> Environment: all
> Reporter: Hugh Cayless
> Fix For: 2.4.2
>
>
> I just spent a long time tracking down a bug resulting from upgrading to
> Lucene 2.4.1 on a project that implements some SpanQuerys of its own and was
> written against 2.3. Since the project's SpanQuerys didn't implement
> getPayloadSpans, the call to that method went to SpanQuery.getPayloadSpans
> which returned null and caused a NullPointerException in the Lucene code, far
> away from the actual source of the problem.
> It would be much better for this kind of thing to show up at compile time, I
> think.
> Thanks!
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