private static DenseVectorSimilarity GetSimilarityFunction()

in Elastic.SemanticKernel.Connectors.Elasticsearch/ElasticsearchVectorStoreCollectionCreateMapping.cs [106:124]

• 17 lines of code
• 2 McCabe index (conditional complexity)

    private static DenseVectorSimilarity GetSimilarityFunction(VectorStoreRecordVectorProperty vectorProperty)
    {
        const string maxInnerProductSimilarity = "max_inner_product";

        if (vectorProperty.DistanceFunction is null)
        {
            return DenseVectorSimilarity.Cosine;
        }

        return vectorProperty.DistanceFunction switch
        {
            DistanceFunction.CosineSimilarity => DenseVectorSimilarity.Cosine,
            DistanceFunction.DotProductSimilarity => DenseVectorSimilarity.DotProduct,
            DistanceFunction.EuclideanDistance => DenseVectorSimilarity.L2Norm,
            maxInnerProductSimilarity => DenseVectorSimilarity.MaxInnerProduct,
            _ => throw new InvalidOperationException(
                $"Distance function '{vectorProperty.DistanceFunction}' for {nameof(VectorStoreRecordVectorProperty)} '{vectorProperty.DataModelPropertyName}' is not supported by the Elasticsearch VectorStore.")
        };
    }