Robert Muir created LUCENE-4250:
-----------------------------------
Summary: PayloadFunction explains are trappy and duplicate the
scoring
Key: LUCENE-4250
URL: https://issues.apache.org/jira/browse/LUCENE-4250
Project: Lucene - Core
Issue Type: Bug
Reporter: Robert Muir
Attachments: LUCENE-4250.patch
the default implementation is basically never useful:
{code}
result.setDescription("Unimpl Payload Function Explain");
result.setValue(1);
{code}
Instead we should just do this:
{code}
result.setDescription(getClass().getSimpleName() + ".docScore()");
result.setValue(docScore(docId, field, numPayloadsSeen, payloadScore));
{code}
And remove all the overriden impls in our Min/Max/Avg that just
duplicate their scoring function.
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