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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 "aggregationresult.h"
#include "hitlist.h"
#include <vespa/searchlib/expression/floatresultnode.h>
namespace search::aggregation {
class HitsAggregationResult : public AggregationResult
{
public:
using FloatResultNode = expression::FloatResultNode;
using SummaryClassType = vespalib::string;
class SummaryGenerator
{
public:
virtual ~SummaryGenerator() { }
virtual vespalib::ConstBufferRef fillSummary(DocId lid, const SummaryClassType & summaryClass) = 0;
};
private:
void onPrepare(const ResultNode & result, bool useForInit) override;
void onAggregate(const ResultNode &result, DocId docId, HitRank rank) override;
void onAggregate(const ResultNode &result, const document::Document & doc, HitRank rank) override;
const ResultNode & onGetRank() const override;
SummaryClassType _summaryClass;
uint32_t _maxHits;
HitList _hits;
bool _isOrdered;
mutable FloatResultNode _bestHitRank;
SummaryGenerator *_summaryGenerator;
public:
class SetOrdered : public vespalib::ObjectOperation, public vespalib::ObjectPredicate
{
private:
void execute(vespalib::Identifiable &obj) override { static_cast<HitsAggregationResult &>(obj)._isOrdered = true; }
bool check(const vespalib::Identifiable &obj) const override { return obj.getClass().inherits(HitsAggregationResult::classId); }
};
DECLARE_AGGREGATIONRESULT(HitsAggregationResult);
HitsAggregationResult();
HitsAggregationResult(HitsAggregationResult &&) noexcept;
HitsAggregationResult & operator=(HitsAggregationResult &&) noexcept;
HitsAggregationResult(const HitsAggregationResult &);
HitsAggregationResult & operator=(const HitsAggregationResult &);
~HitsAggregationResult() override;
void postMerge() override { _hits.postMerge(_maxHits); }
void setSummaryGenerator(SummaryGenerator & summaryGenerator) { _summaryGenerator = &summaryGenerator; }
const SummaryClassType & getSummaryClass() const { return _summaryClass; }
HitsAggregationResult setSummaryClass(const SummaryClassType & summaryClass) { _summaryClass = summaryClass; return *this; }
HitsAggregationResult &setMaxHits(uint32_t maxHits) {
_maxHits = (maxHits == 0) ? std::numeric_limits<uint32_t>::max() : maxHits;
return *this;
}
HitsAggregationResult & addHit(const FS4Hit &hit) { _hits.addHit(hit, _maxHits); return *this; }
HitsAggregationResult & addHit(const VdsHit &hit) { _hits.addHit(hit, _maxHits); return *this; }
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
void selectMembers(const vespalib::ObjectPredicate &predicate, vespalib::ObjectOperation &operation) override;
HitsAggregationResult & sort() { _hits.sort(); return *this; }
const ResultNode * getResult() const override { return &_hits; }
ResultNode & getResult() override { return _hits; }
};
}
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