//******************************************************************************************************//  ApproximatelyEquals.cs - Gbtc////  Copyright © 2013, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), 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.opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  04/14/2013 - Kevin D. Jones//       Generated original version of source code.////****************************************************************************************************** using System;using System.Collections.Generic;using System.Linq; // TODO: Please add comments to these classes#pragma warning disable 1591 namespace GSF.FuzzyStrings{    public static partial class ComparisonMetrics    {        public static bool ApproximatelyEquals(this string source, string target, FuzzyStringComparisonOptions options, FuzzyStringComparisonTolerance tolerance)        {            List<double> comparisonResults = new List<double>();             if (!options.HasFlag(FuzzyStringComparisonOptions.CaseSensitive))            {                source = source.Capitalize();                target = target.Capitalize();            }             // Min: 0    Max: source.Length = target.Length            if (options.HasFlag(FuzzyStringComparisonOptions.UseHammingDistance))            {                if (source.Length == target.Length)                {                    comparisonResults.Add(source.HammingDistance(target) / (double)target.Length);                }            }             // Min: 0    Max: 1            if (options.HasFlag(FuzzyStringComparisonOptions.UseJaccardDistance))            {                comparisonResults.Add(source.JaccardDistance(target));            }             // Min: 0    Max: 1            if (options.HasFlag(FuzzyStringComparisonOptions.UseJaroDistance))            {                comparisonResults.Add(source.JaroDistance(target));            }             // Min: 0    Max: 1            if (options.HasFlag(FuzzyStringComparisonOptions.UseJaroWinklerDistance))            {                comparisonResults.Add(source.JaroWinklerDistance(target));            }             // Min: 0    Max: LevenshteinDistanceUpperBounds - LevenshteinDistanceLowerBounds            // Min: LevenshteinDistanceLowerBounds    Max: LevenshteinDistanceUpperBounds            if (options.HasFlag(FuzzyStringComparisonOptions.UseNormalizedLevenshteinDistance))            {                comparisonResults.Add(Convert.ToDouble(source.NormalizedLevenshteinDistance(target)) / Convert.ToDouble((Math.Max(source.Length, target.Length) - source.LevenshteinDistanceLowerBounds(target))));            }            else if (options.HasFlag(FuzzyStringComparisonOptions.UseLevenshteinDistance))            {                comparisonResults.Add(Convert.ToDouble(source.LevenshteinDistance(target)) / Convert.ToDouble(source.LevenshteinDistanceUpperBounds(target)));            }             if (options.HasFlag(FuzzyStringComparisonOptions.UseLongestCommonSubsequence))            {                comparisonResults.Add(1 - Convert.ToDouble((source.LongestCommonSubsequence(target).Length) / Convert.ToDouble(Math.Min(source.Length, target.Length))));            }             if (options.HasFlag(FuzzyStringComparisonOptions.UseLongestCommonSubstring))            {                comparisonResults.Add(1 - Convert.ToDouble((source.LongestCommonSubstring(target).Length) / Convert.ToDouble(Math.Min(source.Length, target.Length))));            }             // Min: 0    Max: 1            if (options.HasFlag(FuzzyStringComparisonOptions.UseSorensenDiceDistance))            {                comparisonResults.Add(source.SorensenDiceDistance(target));            }             // Min: 0    Max: 1            if (options.HasFlag(FuzzyStringComparisonOptions.UseOverlapCoefficient))            {                comparisonResults.Add(1 - source.OverlapCoefficient(target));            }             // Min: 0    Max: 1            if (options.HasFlag(FuzzyStringComparisonOptions.UseRatcliffObershelpSimilarity))            {                comparisonResults.Add(1 - source.RatcliffObershelpSimilarity(target));            }             if (tolerance == FuzzyStringComparisonTolerance.Strong)            {                if (comparisonResults.Average() < 0.25)                {                    return true;                }                else                {                    return false;                }            }            else if (tolerance == FuzzyStringComparisonTolerance.Normal)            {                if (comparisonResults.Average() < 0.5)                {                    return true;                }                else                {                    return false;                }            }            else if (tolerance == FuzzyStringComparisonTolerance.Weak)            {                if (comparisonResults.Average() < 0.75)                {                    return true;                }                else                {                    return false;                }            }            else if (tolerance == FuzzyStringComparisonTolerance.Manual)            {                if (comparisonResults.Average() > 0.6)                {                    return true;                }                else                {                    return false;                }            }            else            {                return false;            }        }    }}