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https://issues.apache.org/jira/browse/LUCENE-2272?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12837788#action_12837788
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Grant Ingersoll commented on LUCENE-2272:
-----------------------------------------
Peter,
Couple of comments:
* The base explain method can't be abstract. Something like:
{code}
public Explanation explain(int docId){
Explanation result = new Explanation();
result.setDescription("Unimpl Payload Function Explain");
result.setValue(1);
return result;
};
{code}
should do the trick
* The changes don't seem thread safe any more since there are now member
variables. It may still be all right, but have you looked at this aspect?
> PayloadNearQuery has hardwired explanation for 'AveragePayloadFunction'
> -----------------------------------------------------------------------
>
> Key: LUCENE-2272
> URL: https://issues.apache.org/jira/browse/LUCENE-2272
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Reporter: Peter Keegan
> Assignee: Grant Ingersoll
> Attachments: payloadfunctin-patch.txt
>
>
> The 'explain' method in PayloadNearSpanScorer assumes the
> AveragePayloadFunction was used. This patch adds the 'explain' method to the
> 'PayloadFunction' interface, where the Scorer can call it. Added unit tests
> for 'explain' and for {Min,Max}PayloadFunction.
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