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// Copyright 2019 Oath Inc. 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/tensor/dense/dense_tensor_view.h>
#include <vespa/eval/tensor/dense/mutable_dense_tensor_view.h>
#include <vespa/searchlib/fef/termfieldmatchdata.h>
#include <vespa/searchlib/tensor/dense_tensor_attribute.h>
#include <vespa/searchlib/tensor/distance_function.h>
#include <vespa/vespalib/util/priority_queue.h>
#include <cmath>
namespace search::queryeval {
class NearestNeighborIterator : public SearchIterator
{
public:
using DenseTensorAttribute = search::tensor::DenseTensorAttribute;
using DenseTensorView = vespalib::tensor::DenseTensorView;
struct Params {
fef::TermFieldMatchData &tfmd;
const DenseTensorView &queryTensor;
const DenseTensorAttribute &tensorAttribute;
NearestNeighborDistanceHeap &distanceHeap;
const search::BitVector *filter;
const search::tensor::DistanceFunction *distanceFunction;
Params(fef::TermFieldMatchData &tfmd_in,
const DenseTensorView &queryTensor_in,
const DenseTensorAttribute &tensorAttribute_in,
NearestNeighborDistanceHeap &distanceHeap_in,
const search::BitVector *filter_in,
const search::tensor::DistanceFunction *distanceFunction_in)
: tfmd(tfmd_in),
queryTensor(queryTensor_in),
tensorAttribute(tensorAttribute_in),
distanceHeap(distanceHeap_in),
filter(filter_in),
distanceFunction(distanceFunction_in)
{}
};
NearestNeighborIterator(Params params_in)
: _params(params_in)
{}
static std::unique_ptr<NearestNeighborIterator> create(
bool strict,
fef::TermFieldMatchData &tfmd,
const vespalib::tensor::DenseTensorView &queryTensor,
const search::tensor::DenseTensorAttribute &tensorAttribute,
NearestNeighborDistanceHeap &distanceHeap,
const search::BitVector *filter,
const search::tensor::DistanceFunction *dist_fun);
const Params& params() const { return _params; }
private:
Params _params;
};
} // namespace
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