How to access doc values in LeafScoreFunction (noobie)

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1

ES 6.2.3

I'm trying to write a SearchPlugin to do custom scoring, but I can't figure out how to access the doc values in my leaf score function.

The LeafScoreFunction.score() method takes a docId parameter. Is there a way to use that to get to the doc values.

Also, where is the proper place to get access to the document? In the LeafScoreFunction methods? Should I get access to it in the ScoreFunction.getLeafScoreFunction() method and pass it in to my LeafScoreFunction? Somewhere else?

Thank you very much for helping.

2

It looks like you are attempting to implement a FunctionScoreQuery. This class doesn't itself know anything about Lucene, only some implementations do (like ScriptScoreFunction). Maybe consider using an advanced script instead. The docs for writing native scripts (through a custom script engine) explain how to access Lucene data structures.

3

Thank you Ryan, that sent me in the right direction.
The ExplainableScript integration test was also very helpful.