73 lines
2.5 KiB
C#
73 lines
2.5 KiB
C#
// Copyright 2017-2018 Alexander Luzgarev
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using System;
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using System.Linq;
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using System.Numerics;
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namespace MatFileHandler
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{
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/// <summary>
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/// A better interface for using datetime objects.
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/// </summary>
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public class DatetimeAdapter
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{
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private readonly double[] data;
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private readonly double[] data2;
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private readonly int[] dimensions;
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private readonly DateTimeOffset epoch;
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/// <summary>
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/// Initializes a new instance of the <see cref="DatetimeAdapter"/> class.
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/// </summary>
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/// <param name="array">Source datetime object.</param>
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public DatetimeAdapter(IArray array)
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{
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var matObject = array as IMatObject;
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if (matObject?.ClassName != "datetime")
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{
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throw new ArgumentException("The object provided is not a datetime.");
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}
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epoch = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
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var dataArray = matObject["data", 0] as IArrayOf<double>;
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if (dataArray is null)
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{
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var dataComplex = matObject["data", 0] as IArrayOf<Complex>;
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var complexData = dataComplex.ConvertToComplexArray();
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data = complexData.Select(c => c.Real).ToArray();
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data2 = complexData.Select(c => c.Imaginary).ToArray();
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dimensions = dataComplex.Dimensions;
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}
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else
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{
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data = dataArray.ConvertToDoubleArray();
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data2 = new double[data.Length];
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dimensions = dataArray.Dimensions;
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}
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}
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/// <summary>
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/// Gets datetime array dimensions.
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/// </summary>
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public int[] Dimensions => dimensions;
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/// <summary>
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/// Gets values of datetime object at given position in the array converted to <see cref="DateTimeOffset"/>.
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/// </summary>
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/// <param name="list">Indices.</param>
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/// <returns>Value converted to <see cref="DateTimeOffset"/>; null if the resulting value is unrepresentable.</returns>
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public DateTimeOffset? this[params int[] list]
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{
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get
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{
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var milliseconds = data[Dimensions.DimFlatten(list)];
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if (milliseconds < -62_135_596_800_000.0 || milliseconds > 253_402_300_799_999.0)
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{
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return null;
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}
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return epoch.AddMilliseconds(milliseconds);
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}
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}
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}
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} |