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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "i_match_loop_communicator.h"
#include <vespa/searchlib/fef/featureexecutor.h>
#include <vespa/searchlib/queryeval/searchiterator.h>
namespace search::fef {
class RankProgram;
}
namespace proton::matching {
/**
* Class used to calculate the rank score for a set of documents using
* a rank program for calculation and a search iterator for unpacking
* match data. The doScore function must be called with increasing
* docid.
*/
class DocumentScorer
{
private:
search::queryeval::SearchIterator &_searchItr;
search::fef::LazyValue _scoreFeature;
public:
using TaggedHit = IMatchLoopCommunicator::TaggedHit;
using TaggedHits = IMatchLoopCommunicator::TaggedHits;
DocumentScorer(search::fef::RankProgram &rankProgram,
search::queryeval::SearchIterator &searchItr);
search::feature_t doScore(uint32_t docId) {
_searchItr.unpack(docId);
return _scoreFeature.as_number(docId);
}
// annotate hits with rank score, may change order
void score(TaggedHits &hits);
};
}
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