MqlMethod.cs

/* Copyright 2010-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

using System;
using System.Collections.Generic;
using System.Reflection;
using MongoDB.Bson;
using MongoDB.Bson.Serialization;

namespace MongoDB.Driver.Linq.Linq3Implementation.Reflection
{
    internal static class MqlMethod
    {
        // private static fields
        private static readonly MethodInfo __constantWithRepresentation;
        private static readonly MethodInfo __constantWithSerializer;
        private static readonly MethodInfo __convert;
        private static readonly MethodInfo __createObjectId;
        private static readonly MethodInfo __dateFromString;
        private static readonly MethodInfo __dateFromStringWithFormat;
        private static readonly MethodInfo __dateFromStringWithFormatAndTimezone;
        private static readonly MethodInfo __dateFromStringWithFormatAndTimezoneAndOnErrorAndOnNull;
        private static readonly MethodInfo __exists;
        private static readonly MethodInfo __field;
        private static readonly MethodInfo __hash;
        private static readonly MethodInfo __hexHash;
        private static readonly MethodInfo __isMissing;
        private static readonly MethodInfo __isNullOrMissing;
        private static readonly MethodInfo __sigmoid;
        private static readonly MethodInfo __subtype;

        // sets of methods
        private static readonly IReadOnlyMethodInfoSet __dateFromStringOverloads;
        private static readonly IReadOnlyMethodInfoSet __dateFromStringWithFormatOverloads;
        private static readonly IReadOnlyMethodInfoSet __dateFromStringWithTimezoneOverloads;
        private static readonly IReadOnlyMethodInfoSet __similarityFunctionOverloads;

        // static constructor
        static MqlMethod()
        {
            // initialize methods before sets of methods
            __constantWithRepresentation = ReflectionInfo.Method((object value, BsonType representation) => Mql.Constant(value, representation));
            __constantWithSerializer = ReflectionInfo.Method((object value, IBsonSerializer<object> serializer) => Mql.Constant(value, serializer));
            __convert = ReflectionInfo.Method((object value, ConvertOptions<object> options) => Mql.Convert(value, options));
            __createObjectId = ReflectionInfo.Method(() => Mql.CreateObjectId());
            __dateFromString = ReflectionInfo.Method((string dateStringl) => Mql.DateFromString(dateStringl));
            __dateFromStringWithFormat = ReflectionInfo.Method((string dateString, string format) => Mql.DateFromString(dateString, format));
            __dateFromStringWithFormatAndTimezone = ReflectionInfo.Method((string dateString, string format, string timezone) => Mql.DateFromString(dateString, format, timezone));
            __dateFromStringWithFormatAndTimezoneAndOnErrorAndOnNull = ReflectionInfo.Method((string dateString, string format, string timezone, DateTime? onError, DateTime? onNull) => Mql.DateFromString(dateString, format, timezone, onError, onNull));
            __exists = ReflectionInfo.Method((object field) => Mql.Exists(field));
            __field = ReflectionInfo.Method((object container, string fieldName, IBsonSerializer<object> serializer) => Mql.Field<object, object>(container, fieldName, serializer));
            __hash = ReflectionInfo.Method((object value, MqlHashAlgorithm algorithm) => Mql.Hash(value, algorithm));
            __hexHash = ReflectionInfo.Method((object value, MqlHashAlgorithm algorithm) => Mql.HexHash(value, algorithm));
            __isMissing = ReflectionInfo.Method((object field) => Mql.IsMissing(field));
            __isNullOrMissing = ReflectionInfo.Method((object field) => Mql.IsNullOrMissing(field));
            __sigmoid = ReflectionInfo.Method((double value) => Mql.Sigmoid(value));
            __subtype = ReflectionInfo.Method((object value) => Mql.Subtype(value));

            var dotProductEnumerable = ReflectionInfo.Method((IEnumerable<object> vectors1, IEnumerable<object> vectors2, bool normalizeScore) => Mql.SimilarityDotProduct(vectors1, vectors2, normalizeScore));
            var dotProductMemory = ReflectionInfo.Method((ReadOnlyMemory<object> vectors1, ReadOnlyMemory<object> vectors2, bool normalizeScore) => Mql.SimilarityDotProduct(vectors1, vectors2, normalizeScore));
            var euclideanEnumerable = ReflectionInfo.Method((IEnumerable<object> vectors1, IEnumerable<object> vectors2, bool normalizeScore) => Mql.SimilarityEuclidean(vectors1, vectors2, normalizeScore));
            var euclideanMemory = ReflectionInfo.Method((ReadOnlyMemory<object> vectors1, ReadOnlyMemory<object> vectors2, bool normalizeScore) => Mql.SimilarityEuclidean(vectors1, vectors2, normalizeScore));
            var cosineEnumerable = ReflectionInfo.Method((IEnumerable<object> vectors1, IEnumerable<object> vectors2, bool normalizeScore) => Mql.SimilarityCosine(vectors1, vectors2, normalizeScore));
            var cosineMemory = ReflectionInfo.Method((ReadOnlyMemory<object> vectors1, ReadOnlyMemory<object> vectors2, bool normalizeScore) => Mql.SimilarityCosine(vectors1, vectors2, normalizeScore));

            // initialize sets of methods after methods
            __dateFromStringOverloads = MethodInfoSet.Create(
            [
                __dateFromString,
                __dateFromStringWithFormat,
                __dateFromStringWithFormatAndTimezone,
                __dateFromStringWithFormatAndTimezoneAndOnErrorAndOnNull
            ]);

            __dateFromStringWithFormatOverloads = MethodInfoSet.Create(
            [
               __dateFromStringWithFormat,
               __dateFromStringWithFormatAndTimezone,
               __dateFromStringWithFormatAndTimezoneAndOnErrorAndOnNull
            ]);

            __dateFromStringWithTimezoneOverloads = MethodInfoSet.Create(
            [
                __dateFromStringWithFormatAndTimezone,
                __dateFromStringWithFormatAndTimezoneAndOnErrorAndOnNull
            ]);

            __similarityFunctionOverloads = MethodInfoSet.Create(
            [
                dotProductEnumerable,
                dotProductMemory,
                euclideanEnumerable,
                euclideanMemory,
                cosineEnumerable,
                cosineMemory,
            ]);
        }

        // public properties
        public static MethodInfo ConstantWithRepresentation => __constantWithRepresentation;
        public static MethodInfo ConstantWithSerializer => __constantWithSerializer;
        public static MethodInfo Convert => __convert;
        public static MethodInfo CreateObjectId => __createObjectId;
        public static MethodInfo DateFromString => __dateFromString;
        public static MethodInfo DateFromStringWithFormat => __dateFromStringWithFormat;
        public static MethodInfo DateFromStringWithFormatAndTimezone => __dateFromStringWithFormatAndTimezone;
        public static MethodInfo DateFromStringWithFormatAndTimezoneAndOnErrorAndOnNull => __dateFromStringWithFormatAndTimezoneAndOnErrorAndOnNull;
        public static MethodInfo Exists => __exists;
        public static MethodInfo Field => __field;
        public static MethodInfo Hash => __hash;
        public static MethodInfo HexHash => __hexHash;
        public static MethodInfo IsMissing => __isMissing;
        public static MethodInfo IsNullOrMissing => __isNullOrMissing;
        public static MethodInfo Sigmoid => __sigmoid;
        public static MethodInfo Subtype => __subtype;

        // sets of methods
        public static IReadOnlyMethodInfoSet DateFromStringOverloads => __dateFromStringOverloads;
        public static IReadOnlyMethodInfoSet DateFromStringWithFormatOverloads => __dateFromStringWithFormatOverloads;
        public static IReadOnlyMethodInfoSet DateFromStringWithTimezoneOverloads => __dateFromStringWithTimezoneOverloads;
        public static IReadOnlyMethodInfoSet SimilarityFunctionOverloads => __similarityFunctionOverloads;
    }
}