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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 "hnsw_index_type.h"
namespace search::tensor {
class HnswSimpleNode;
class HnswNode;
class HnswIdentityMapping;
class HnswMultiBestNeighbors;
class HnswNodeidMapping;
class HnswSingleBestNeighbors;
/*
* Class that selects what node type and id mapping to use based on
* hnsw index type.
*/
template <HnswIndexType type>
class HnswIndexTraits;
/*
* Node type and id mapping for hnsw index type SINGLE.
*
* One node per document.
* Identity mapping between nodeid and docid.
*/
template <>
class HnswIndexTraits<HnswIndexType::SINGLE>
{
public:
using NodeType = HnswSimpleNode;
using IdMapping = HnswIdentityMapping;
using SearchBestNeighbors = HnswSingleBestNeighbors;
};
/*
* Node type and id mapping for hnsw index type MULTI.
*
* Multiple nodes per document.
* Managed mapping between nodeid and docid.
*/
template <>
class HnswIndexTraits<HnswIndexType::MULTI>
{
public:
using NodeType = HnswNode;
using IdMapping = HnswNodeidMapping;
using SearchBestNeighbors = HnswMultiBestNeighbors;
};
}
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