57 lines
2.3 KiB
C#
57 lines
2.3 KiB
C#
using System;
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using System.Collections.Generic;
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namespace DTS.DASLib.Service
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{
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// Custom comparer for the IDASCommunication class.
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public class AnalogInputDASChannelComparer : IEqualityComparer<AnalogInputDASChannel>
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{
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// GainInfo are equal if their Gain is equal.
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public bool Equals(AnalogInputDASChannel x, AnalogInputDASChannel y)
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{
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// Check whether the compared objects reference the same data.
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if (ReferenceEquals(x, y))
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return true;
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// Check whether any of the compared objects is null.
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if (x is null || y is null)
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return false;
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if (x.OwningModule == null || y.OwningModule == null)
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return false;
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if (x.OwningModule.OwningDAS == null || y.OwningModule.OwningDAS == null)
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return false;
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if (string.IsNullOrEmpty(x.OwningModule.OwningDAS.SerialNumber) ||
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string.IsNullOrEmpty(y.OwningModule.OwningDAS.SerialNumber))
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return false;
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// Check whether they are equal.
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return x.ModuleChannelNumber == y.ModuleChannelNumber &&
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x.OwningModule.ModuleArrayIndex == y.OwningModule.ModuleArrayIndex &&
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x.OwningModule.OwningDAS.SerialNumber == y.OwningModule.OwningDAS.SerialNumber &&
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x.AbsoluteDisplayOrder == y.AbsoluteDisplayOrder &&
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x.UnitConverision == y.UnitConverision;
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}
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// If Equals() returns true for a pair of objects,
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// GetHashCode must return the same value for these objects.
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public int GetHashCode(AnalogInputDASChannel analog)
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{
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// Check whether the object is null.
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if (string.IsNullOrEmpty(analog.OwningModule?.OwningDAS?.SerialNumber))
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return 0;
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// Get the hash code for the fields
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return analog.ModuleChannelNumber.GetHashCode() ^
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analog.OwningModule.ModuleArrayIndex.GetHashCode() ^
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analog.OwningModule.OwningDAS.SerialNumber.GetHashCode() ^
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analog.AbsoluteDisplayOrder.GetHashCode() ^
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analog.UnitConverision.GetHashCode();
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}
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}
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}
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