Jedd Morgan
46 lines
1.7 KiB
C#
46 lines
1.7 KiB
C#
using System.Diagnostics;
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using System.Diagnostics.CodeAnalysis;
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using Speckle.Importers.Ifc.Ara3D.StepParser;
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using Speckle.Sdk.Common;
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namespace Speckle.Importers.Ifc.Ara3D.IfcParser.Schema;
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// This merges two separate entity types: IfcPropertySet and IfcElementQuantity.
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// Both of which are derived from IfcPropertySetDefinition.
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// This is something that can be referred to by a PropertySetRelation
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// An IfcElementQuantity has an additional "method of measurement" property.
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// https://standards.buildingsmart.org/IFC/RELEASE/IFC2x3/TC1/HTML/ifckernel/lexical/ifcpropertyset.htm
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// https://standards.buildingsmart.org/IFC/RELEASE/IFC2x3/TC1/HTML/ifcproductextension/lexical/ifcelementquantity.htm
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public class IfcPropSet : IfcNode
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{
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public readonly StepList? PropertyIdList;
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public IfcPropSet(IfcGraph graph, StepInstance lineData, StepList? propertyIdList)
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: base(graph, lineData)
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{
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Debug.Assert(IsIfcRoot);
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Debug.Assert(lineData.AttributeValues.Count is 5 or 6);
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Debug.Assert(Type is "IFCPROPERTYSET" or "IFCELEMENTQUANTITY");
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PropertyIdList = propertyIdList;
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}
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public IEnumerable<IfcProp> GetProperties()
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{
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for (var i = 0; i < NumProperties; ++i)
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{
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var id = PropertyId(i);
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var node = Graph.GetNode(id);
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if (node is not IfcProp prop)
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throw new SpeckleIfcException($"Expected a property not {node} from id {id}");
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yield return prop;
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}
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}
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public bool IsQuantity => LineData.AttributeValues.Count == 6;
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public string? MethodOfMeasurement => IsQuantity ? this[4]?.AsString() : null;
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public int NumProperties => PropertyIdList?.Values.Count ?? 0;
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[MemberNotNull(nameof(PropertyIdList))]
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public uint PropertyId(int i) => PropertyIdList.NotNull().Values[i].AsId();
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}
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