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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 "wand_parts.h"
#include "weak_and_heap.h"
#include <vespa/searchlib/queryeval/blueprint.h>
#include <vespa/searchlib/fef/matchdatalayout.h>
#include <vespa/searchlib/fef/termfieldmatchdataarray.h>
#include <memory>
#include <vector>
namespace search::queryeval {
const uint32_t DEFAULT_PARALLEL_WAND_SCORES_ADJUST_FREQUENCY = 4;
/**
* Blueprint for the parallel weak and search operator.
*/
class ParallelWeakAndBlueprint : public ComplexLeafBlueprint
{
private:
using score_t = wand::score_t;
const FieldSpec _field;
mutable SharedWeakAndPriorityQueue _scores;
const wand::score_t _scoreThreshold;
double _thresholdBoostFactor;
const uint32_t _scoresAdjustFrequency;
HitEstimate _estimate;
fef::MatchDataLayout _layout;
std::vector<int32_t> _weights;
std::vector<Blueprint::UP> _terms;
ParallelWeakAndBlueprint(const ParallelWeakAndBlueprint &);
ParallelWeakAndBlueprint &operator=(const ParallelWeakAndBlueprint &);
public:
ParallelWeakAndBlueprint(const FieldSpec &field,
uint32_t scoresToTrack,
score_t scoreThreshold,
double thresholdBoostFactor);
ParallelWeakAndBlueprint(const FieldSpec &field,
uint32_t scoresToTrack,
score_t scoreThreshold,
double thresholdBoostFactor,
uint32_t scoresAdjustFrequency);
virtual ~ParallelWeakAndBlueprint() override;
const WeakAndHeap &getScores() const { return _scores; }
score_t getScoreThreshold() const { return _scoreThreshold; }
double getThresholdBoostFactor() const { return _thresholdBoostFactor; }
// Used by create visitor
FieldSpec getNextChildField(const FieldSpec &outer);
// Used by create visitor
void addTerm(Blueprint::UP term, int32_t weight);
SearchIterator::UP createLeafSearch(const fef::TermFieldMatchDataArray &tfmda, bool strict) const override;
std::unique_ptr<SearchIterator> createFilterSearch(bool strict, FilterConstraint constraint) const override;
void visitMembers(vespalib::ObjectVisitor &visitor) const override;
void fetchPostings(const ExecuteInfo &execInfo) override;
bool always_needs_unpack() const override;
};
}
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