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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include "searchiterator.h"
#include "nearest_neighbor_distance_heap.h"
#include <vespa/eval/eval/value.h>
#include <vespa/searchlib/fef/termfieldmatchdata.h>
#include <vespa/searchlib/tensor/i_tensor_attribute.h>
#include <vespa/vespalib/util/priority_queue.h>
#include <cmath>
namespace search::tensor { class DistanceCalculator; }
namespace search::queryeval {
class GlobalFilter;
class NearestNeighborIterator : public SearchIterator
{
public:
using ITensorAttribute = search::tensor::ITensorAttribute;
using Value = vespalib::eval::Value;
struct Params {
fef::TermFieldMatchData &tfmd;
std::unique_ptr<search::tensor::DistanceCalculator> distance_calc;
NearestNeighborDistanceHeap &distanceHeap;
const GlobalFilter &filter;
Params(fef::TermFieldMatchData &tfmd_in,
std::unique_ptr<search::tensor::DistanceCalculator> distance_calc_in,
NearestNeighborDistanceHeap &distanceHeap_in,
const GlobalFilter &filter_in)
: tfmd(tfmd_in),
distance_calc(std::move(distance_calc_in)),
distanceHeap(distanceHeap_in),
filter(filter_in)
{}
};
NearestNeighborIterator(Params params_in)
: _params(std::move(params_in))
{}
static std::unique_ptr<NearestNeighborIterator> create(
bool strict,
fef::TermFieldMatchData &tfmd,
std::unique_ptr<search::tensor::DistanceCalculator> distance_calc,
NearestNeighborDistanceHeap &distanceHeap,
const GlobalFilter &filter);
const Params& params() const { return _params; }
private:
Params _params;
};
} // namespace
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