105 lines
4.2 KiB
C#
105 lines
4.2 KiB
C#
using StructureHelperCommon.Infrastructures.Exceptions;
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using StructureHelperCommon.Infrastructures.Interfaces;
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using StructureHelperCommon.Models;
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using System;
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using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace StructureHelperCommon.Models.Calculators
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{
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public class FindParameterCalculator : IFindParameterCalculator
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{
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FindParameterResult result;
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public string Name { get; set; }
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public IFindParameterCalculatorInputData InputData { get; set; }
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public IAccuracy Accuracy { get; set; }
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public IResult Result => result;
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public Action<IResult> ActionToOutputResults { get; set; }
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public IShiftTraceLogger? TraceLogger { get; set; }
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public Guid Id => throw new NotImplementedException();
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public FindParameterCalculator()
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{
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InputData = new FindParameterCalculatorInputData();
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Accuracy = new Accuracy()
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{
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IterationAccuracy = 0.001d,
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MaxIterationCount = 1000
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};
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}
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public void Run()
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{
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result = new();
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try
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{
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FindMinimumValue(InputData.StartValue, InputData.EndValue, InputData.Predicate);
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}
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catch (Exception ex)
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{
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result.IsValid = false;
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result.Description += ex;
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}
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}
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public object Clone()
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{
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throw new NotImplementedException();
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}
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private void FindMinimumValue(double start, double end, Predicate<double> predicate)
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{
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TraceLogger?.AddMessage($"Calculating parameter by iterations is started,\nrequired precision {Accuracy.IterationAccuracy}");
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if (predicate(end) == false)
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{
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TraceLogger?.AddMessage($"Predicate for end value must be true", TraceLogStatuses.Error);
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throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": predicate for end value must be true");
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}
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double precision = Accuracy.IterationAccuracy;
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int maxIterationCount = Accuracy.MaxIterationCount;
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double current = start;
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double step = (end - start) / 2d;
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int iterationNum = 0;
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while (step > precision)
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{
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TraceLogger?.AddMessage($"Iteration number {iterationNum} is started", TraceLogStatuses.Debug);
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if (predicate(current) == true)
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{
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TraceLogger?.AddMessage($"Predicate value in {current} is true", TraceLogStatuses.Debug, 50);
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end = current;
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}
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else
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{
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TraceLogger?.AddMessage($"Predicate value in {current} is false", TraceLogStatuses.Debug, 50);
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start = current;
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}
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current = (start + end) / 2d;
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TraceLogger?.AddMessage($"New current value Cur=({start}+{end})/2={current}", TraceLogStatuses.Debug);
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step = (end - start) / 2d;
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TraceLogger?.AddMessage($"New step S={current}", TraceLogStatuses.Debug, 50);
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iterationNum++;
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result.IsValid = false;
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result.IterationNumber = iterationNum;
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result.CurrentAccuracy = step;
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ActionToOutputResults?.Invoke(result);
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if (iterationNum > maxIterationCount)
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{
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TraceLogger?.AddMessage($"Recuired precision was not achieved, current step {step}, required precision {precision}", TraceLogStatuses.Error);
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result.Description = "Parameter was not found succefully: \n";
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throw new StructureHelperException(ErrorStrings.DataIsInCorrect + ": violation of iteration count");
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}
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}
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TraceLogger?.AddMessage($"Parameter value Cur={current} was found,\nCalculation has finished succefully");
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result.Parameter = current;
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result.Description = "Parameter was found succefully";
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result.IsValid = true;
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ActionToOutputResults?.Invoke(result);
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}
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}
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}
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