Joseph Doherty
56 lines
3.7 KiB
C#
56 lines
3.7 KiB
C#
using System.Collections.Frozen;
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using Opc.Ua;
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using ZB.MOM.WW.OtOpcUa.Core.Abstractions;
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namespace ZB.MOM.WW.OtOpcUa.OpcUaServer;
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/// <summary>
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/// The one table between OPC UA Part 13 standard aggregate-function NodeIds (<c>ObjectIds.AggregateFunction_*</c>)
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/// and <see cref="HistoryAggregateType"/>. HistoryRead-Processed maps a request's aggregate through it, and the
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/// advertised <c>AggregateFunctions</c> folders map a backend's served set back through it — one table, so a
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/// NodeId the server can dispatch is exactly a NodeId it can advertise.
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/// </summary>
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internal static class AggregateFunctionMap
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{
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/// <summary>NodeId ⇒ aggregate, for every aggregate the server can name to a backend.</summary>
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public static readonly FrozenDictionary<NodeId, HistoryAggregateType> ByNodeId = new Dictionary<NodeId, HistoryAggregateType>
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{
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[ObjectIds.AggregateFunction_Average] = HistoryAggregateType.Average,
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[ObjectIds.AggregateFunction_Minimum] = HistoryAggregateType.Minimum,
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[ObjectIds.AggregateFunction_Maximum] = HistoryAggregateType.Maximum,
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[ObjectIds.AggregateFunction_Total] = HistoryAggregateType.Total,
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[ObjectIds.AggregateFunction_Count] = HistoryAggregateType.Count,
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[ObjectIds.AggregateFunction_Interpolative] = HistoryAggregateType.Interpolative,
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[ObjectIds.AggregateFunction_TimeAverage] = HistoryAggregateType.TimeAverage,
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[ObjectIds.AggregateFunction_Start] = HistoryAggregateType.Start,
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[ObjectIds.AggregateFunction_End] = HistoryAggregateType.End,
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[ObjectIds.AggregateFunction_Delta] = HistoryAggregateType.Delta,
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[ObjectIds.AggregateFunction_Range] = HistoryAggregateType.Range,
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[ObjectIds.AggregateFunction_MinimumActualTime] = HistoryAggregateType.MinimumActualTime,
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[ObjectIds.AggregateFunction_MaximumActualTime] = HistoryAggregateType.MaximumActualTime,
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[ObjectIds.AggregateFunction_StartBound] = HistoryAggregateType.StartBound,
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[ObjectIds.AggregateFunction_EndBound] = HistoryAggregateType.EndBound,
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[ObjectIds.AggregateFunction_DeltaBounds] = HistoryAggregateType.DeltaBounds,
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[ObjectIds.AggregateFunction_DurationGood] = HistoryAggregateType.DurationGood,
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[ObjectIds.AggregateFunction_DurationBad] = HistoryAggregateType.DurationBad,
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[ObjectIds.AggregateFunction_PercentGood] = HistoryAggregateType.PercentGood,
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[ObjectIds.AggregateFunction_PercentBad] = HistoryAggregateType.PercentBad,
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[ObjectIds.AggregateFunction_WorstQuality] = HistoryAggregateType.WorstQuality,
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[ObjectIds.AggregateFunction_NumberOfTransitions] = HistoryAggregateType.NumberOfTransitions,
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[ObjectIds.AggregateFunction_AnnotationCount] = HistoryAggregateType.AnnotationCount,
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[ObjectIds.AggregateFunction_StandardDeviationPopulation] = HistoryAggregateType.StandardDeviationPopulation,
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[ObjectIds.AggregateFunction_VariancePopulation] = HistoryAggregateType.VariancePopulation,
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[ObjectIds.AggregateFunction_TimeAverage2] = HistoryAggregateType.TimeAverage2,
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[ObjectIds.AggregateFunction_Total2] = HistoryAggregateType.Total2,
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}.ToFrozenDictionary();
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/// <summary>
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/// Map a request's aggregate-function NodeId to <see cref="HistoryAggregateType"/>; <c>null</c> for one the server
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/// cannot name to any backend (the caller answers <c>BadAggregateNotSupported</c>).
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/// </summary>
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/// <param name="aggregateNodeId">The per-node aggregate-function NodeId from the request.</param>
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/// <returns>The mapped aggregate, or <c>null</c>.</returns>
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public static HistoryAggregateType? Map(NodeId? aggregateNodeId) =>
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aggregateNodeId is { } nodeId && ByNodeId.TryGetValue(nodeId, out var aggregate) ? aggregate : null;
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}
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