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https://issues.apache.org/jira/browse/LUCENE-1790?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743747#action_12743747
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Mark Miller commented on LUCENE-1790:
-------------------------------------
BoostingFunctionTermQuery implements equals but not hashcode - important for a
query class I think.
> Add Boosting Function Term Query and Some Payload Query refactorings
> --------------------------------------------------------------------
>
> Key: LUCENE-1790
> URL: https://issues.apache.org/jira/browse/LUCENE-1790
> Project: Lucene - Java
> Issue Type: New Feature
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1790-position.patch, LUCENE-1790.patch,
> LUCENE-1790.patch, LUCENE-1790.patch
>
>
> Similar to the BoostingTermQuery, the BoostingFunctionTermQuery is a
> SpanTermQuery, but the difference is the payload score for a doc is not the
> average of all the payloads, but applies a function to them instead.
> BoostingTermQuery becomes a BoostingFunctionTermQuery with an
> AveragePayloadFunction applied to it.
> Also add marker interface to indicate PayloadQuery types. Refactor
> Similarity.scorePayload to also take in the doc id.
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