22711149797

Committed 05 Mar 2026 09:24AM UTC coverage: 76.651% (-0.02%) from 76.673%

Build # 22711149797

Build Type

Pull #895

github

Committed by

web-flow

Commit Message

Merge 8498cb17c into f2f8e99ec

Pull Request Pull Request #895: Issue 536 dimassoc object

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8363 of 11856 branches covered (70.54%)

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193 of 276 new or added lines in 9 files covered. (69.93%)

2 existing lines in 1 file now uncovered.

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Source File
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81.34

/src/ACadSharp/IO/DXF/DxfStreamReader/DxfObjectsSectionReader.cs

﻿using ACadSharp.Classes;
using ACadSharp.Entities;
using ACadSharp.IO.Templates;
using ACadSharp.Objects;
using ACadSharp.Objects.Evaluations;
using CSMath;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using static ACadSharp.IO.Templates.CadEvaluationGraphTemplate;
using static ACadSharp.IO.Templates.CadTableEntityTemplate;

namespace ACadSharp.IO.DXF
{
        internal class DxfObjectsSectionReader : DxfSectionReaderBase
        {
                public delegate bool ReadObjectDelegate<T>(CadTemplate template, DxfMap map) where T : CadObject;

                public DxfObjectsSectionReader(IDxfStreamReader reader, DxfDocumentBuilder builder)
                        : base(reader, builder)
                {
                }

                public override void Read()
                {
                        //Advance to the first value in the section
                        this._reader.ReadNext();

                        //Loop until the section ends
                        while (this._reader.ValueAsString != DxfFileToken.EndSection)
                        {
                                CadTemplate template = null;

                                try
                                {
                                        template = this.readObject();
                                }
                                catch (Exception ex)
                                {
                                        if (!this._builder.Configuration.Failsafe)
                                                throw;

                                        this._builder.Notify($"Error while reading an object at line {this._reader.Position}", NotificationType.Error, ex);

                                        while (this._reader.DxfCode != DxfCode.Start)
                                                this._reader.ReadNext();
                                }

                                if (template == null)
                                        continue;

                                //Add the object and the template to the builder
                                this._builder.AddTemplate(template);
                        }
                }

                private CadTemplate readObject()
                {
                        this.currentSubclass = string.Empty;
                        switch (this._reader.ValueAsString)
                        {
                                case DxfFileToken.BlkRefObjectContextData:
                                        return this.readObjectCodes<BlockReferenceObjectContextData>(new CadAnnotScaleObjectContextDataTemplate(new BlockReferenceObjectContextData()), this.readAnnotScaleObjectContextData);
                                case DxfFileToken.MTextAttributeObjectContextData:
                                        return this.readObjectCodes<MTextAttributeObjectContextData>(new CadAnnotScaleObjectContextDataTemplate(new MTextAttributeObjectContextData()), this.readAnnotScaleObjectContextData);
                                case DxfFileToken.ObjectPlaceholder:
                                        return this.readObjectCodes<AcdbPlaceHolder>(new CadNonGraphicalObjectTemplate(new AcdbPlaceHolder()), this.readObjectSubclassMap);
                                case DxfFileToken.ObjectDBColor:
                                        return this.readObjectCodes<BookColor>(new CadNonGraphicalObjectTemplate(new BookColor()), this.readBookColor);
                                case DxfFileToken.ObjectDimensionAssociation:
                                        return this.readObjectCodes<DimensionAssociation>(new CadDimensionAssociationTemplate(), this.readDimensionAssociation);
                                case DxfFileToken.ObjectDictionary:
                                        return this.readObjectCodes<CadDictionary>(new CadDictionaryTemplate(), this.readDictionary);
                                case DxfFileToken.ObjectDictionaryWithDefault:
                                        return this.readObjectCodes<CadDictionaryWithDefault>(new CadDictionaryWithDefaultTemplate(), this.readDictionaryWithDefault);
                                case DxfFileToken.ObjectLayout:
                                        return this.readObjectCodes<Layout>(new CadLayoutTemplate(), this.readLayout);
                                case DxfFileToken.ObjectPlotSettings:
                                        return this.readObjectCodes<PlotSettings>(new CadNonGraphicalObjectTemplate(new PlotSettings()), this.readPlotSettings);
                                case DxfFileToken.ObjectEvalGraph:
                                        return this.readObjectCodes<EvaluationGraph>(new CadEvaluationGraphTemplate(), this.readEvaluationGraph);
                                case DxfFileToken.ObjectImageDefinition:
                                        return this.readObjectCodes<ImageDefinition>(new CadNonGraphicalObjectTemplate(new ImageDefinition()), this.readObjectSubclassMap);
                                case DxfFileToken.ObjectDictionaryVar:
                                        return this.readObjectCodes<DictionaryVariable>(new CadTemplate<DictionaryVariable>(new DictionaryVariable()), this.readObjectSubclassMap);
                                case DxfFileToken.ObjectPdfDefinition:
                                        return this.readObjectCodes<PdfUnderlayDefinition>(new CadNonGraphicalObjectTemplate(new PdfUnderlayDefinition()), this.readObjectSubclassMap);
                                case DxfFileToken.ObjectSortEntsTable:
                                        return this.readSortentsTable();
                                case DxfFileToken.ObjectImageDefinitionReactor:
                                        return this.readObjectCodes<ImageDefinitionReactor>(new CadNonGraphicalObjectTemplate(new ImageDefinitionReactor()), this.readObjectSubclassMap);
                                case DxfFileToken.ObjectProxyObject:
                                        return this.readObjectCodes<ProxyObject>(new CadProxyObjectTemplate(), this.readProxyObject);
                                case DxfFileToken.ObjectRasterVariables:
                                        return this.readObjectCodes<RasterVariables>(new CadNonGraphicalObjectTemplate(new RasterVariables()), this.readObjectSubclassMap);
                                case DxfFileToken.ObjectGroup:
                                        return this.readObjectCodes<Group>(new CadGroupTemplate(), this.readGroup);
                                case DxfFileToken.ObjectGeoData:
                                        return this.readObjectCodes<GeoData>(new CadGeoDataTemplate(), this.readGeoData);
                                case DxfFileToken.ObjectMaterial:
                                        return this.readObjectCodes<Material>(new CadMaterialTemplate(), this.readMaterial);
                                case DxfFileToken.ObjectScale:
                                        return this.readObjectCodes<Scale>(new CadTemplate<Scale>(new Scale()), this.readScale);
                                case DxfFileToken.ObjectTableContent:
                                        return this.readObjectCodes<TableContent>(new CadTableContentTemplate(), this.readTableContent);
                                case DxfFileToken.ObjectVisualStyle:
                                        return this.readObjectCodes<VisualStyle>(new CadTemplate<VisualStyle>(new VisualStyle()), this.readVisualStyle);
                                case DxfFileToken.ObjectSpatialFilter:
                                        return this.readObjectCodes<SpatialFilter>(new CadSpatialFilterTemplate(), this.readSpatialFilter);
                                case DxfFileToken.ObjectMLineStyle:
                                        return this.readObjectCodes<MLineStyle>(new CadMLineStyleTemplate(), this.readMLineStyle);
                                case DxfFileToken.ObjectMLeaderStyle:
                                        return this.readObjectCodes<MultiLeaderStyle>(new CadMLeaderStyleTemplate(), this.readMLeaderStyle);
                                case DxfFileToken.ObjectTableStyle:
                                        return this.readObjectCodes<TableStyle>(new CadTableStyleTemplate(), this.readTableStyle);
                                case DxfFileToken.ObjectXRecord:
                                        return this.readObjectCodes<XRecord>(new CadXRecordTemplate(), this.readXRecord);
                                case DxfFileToken.ObjectBlockRepresentationData:
                                        return this.readObjectCodes<BlockRepresentationData>(new CadBlockRepresentationDataTemplate(), this.readBlockRepresentationData);
                                case DxfFileToken.ObjectBlockGripLocationComponent:
                                        return this.readObjectCodes<BlockGripExpression>(new CadBlockGripExpressionTemplate(), this.readBlockGripExpression);
                                case DxfFileToken.ObjectBlockVisibilityGrip:
                                        return this.readObjectCodes<BlockVisibilityGrip>(new CadBlockVisibilityGripTemplate(), this.readBlockVisibilityGrip);
                                case DxfFileToken.ObjectBlockVisibilityParameter:
                                        return this.readObjectCodes<BlockVisibilityParameter>(new CadBlockVisibilityParameterTemplate(), this.readBlockVisibilityParameter);
                                case DxfFileToken.ObjectBlockRotationParameter:
                                        return this.readObjectCodes<BlockRotationParameter>(new CadBlockRotationParameterTemplate(), this.readBlockRotationParameter);
                                case DxfFileToken.ObjectBlockRotationGrip:
                                        return this.readObjectCodes<BlockRotationGrip>(new CadBlockRotationGripTemplate(), this.readBlockRotationGrip);
                                case DxfFileToken.ObjectBlockRotateAction:
                                        return this.readObjectCodes<BlockRotationAction>(new CadBlockRotationActionTemplate(), this.readBlockRotationAction);
                                case DxfFileToken.ObjectField:
                                        return this.readObjectCodes<Field>(new CadFieldTemplate(new Field()), this.readField);
                                case DxfFileToken.ObjectFieldList:
                                        return this.readObjectCodes<FieldList>(new CadFieldListTemplate(new FieldList()), this.readFieldList);
                                default:
                                        DxfMap map = DxfMap.Create<CadObject>();
                                        CadUnknownNonGraphicalObjectTemplate unknownEntityTemplate = null;
                                        if (this._builder.DocumentToBuild.Classes.TryGetByName(this._reader.ValueAsString, out Classes.DxfClass dxfClass))
                                        {
                                                this._builder.Notify($"NonGraphicalObject not supported read as an UnknownNonGraphicalObject: {this._reader.ValueAsString}", NotificationType.NotImplemented);
                                                unknownEntityTemplate = new CadUnknownNonGraphicalObjectTemplate(new UnknownNonGraphicalObject(dxfClass));
                                        }
                                        else
                                        {
                                                this._builder.Notify($"UnknownNonGraphicalObject not supported: {this._reader.ValueAsString}", NotificationType.NotImplemented);
                                        }

                                        this._reader.ReadNext();

                                        do
                                        {
                                                if (unknownEntityTemplate != null && this._builder.KeepUnknownEntities)
                                                {
                                                        this.readCommonCodes(unknownEntityTemplate, out bool isExtendedData, map);
                                                        if (isExtendedData)
                                                                continue;
                                                }

                                                this._reader.ReadNext();
                                        }
                                        while (this._reader.DxfCode != DxfCode.Start);

                                        return unknownEntityTemplate;
                        }
                }

                protected CadTemplate readObjectCodes<T>(CadTemplate template, ReadObjectDelegate<T> readObject)
                        where T : CadObject
                {
                        this._reader.ReadNext();

                        DxfMap map = DxfMap.Create<T>();

                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                if (!readObject(template, map))
                                {
                                        this.readCommonCodes(template, out bool isExtendedData, map);
                                        if (isExtendedData)
                                                continue;
                                }

                                if (this.lockPointer)
                                {
                                        this.lockPointer = false;
                                        continue;
                                }

                                if (this._reader.DxfCode != DxfCode.Start)
                                {
                                        this._reader.ReadNext();
                                }
                        }

                        return template;
                }

                private bool readFieldList(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadFieldListTemplate;

                        switch (this._reader.Code)
                        {
                                case 100 when this._reader.ValueAsString == DxfSubclassMarker.IdSet:
                                        this.currentSubclass = this._reader.ValueAsString;
                                        return true;
                                case 90 when this.currentSubclass == DxfSubclassMarker.IdSet:
                                        return true;
                                case 330 when this.currentSubclass == DxfSubclassMarker.IdSet:
                                        tmp.OwnedObjectsHandlers.Add(this._reader.ValueAsHandle);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.FieldList]);
                        }
                }

                private bool readField(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadFieldTemplate;

                        switch (this._reader.Code)
                        {
                                case 3:
                                        tmp.CadObject.FieldCode += this._reader.ValueAsString;
                                        return true;
                                //98 Length of format string
                                case 98:
                                        return true;
                                case 6:
                                        string key = this._reader.ValueAsString;
                                        var t = this.readCadValue(this._reader.ValueAsString);
                                        tmp.CadObject.Values.Add(key, t.CadValue);
                                        tmp.CadValueTemplates.Add(t);
                                        return true;
                                case 7:
                                        t = this.readCadValue(this._reader.ValueAsString);
                                        tmp.CadObject.Value = t.CadValue;
                                        tmp.CadValueTemplates.Add(t);
                                        return true;
                                case 331:
                                        tmp.CadObjectsHandles.Add(this._reader.ValueAsHandle);
                                        return true;
                                case 360:
                                        tmp.ChildrenHandles.Add(this._reader.ValueAsHandle);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Field]);
                        }
                }

                private CadValueTemplate readCadValue(string name)
                {
                        this._reader.ReadNext();

                        CadValue value = new();
                        CadValueTemplate template = new(value);
                        var map = DxfClassMap.Create(value.GetType(), name);

                        while (this._reader.Code != 304)
                        {
                                switch (this._reader.Code)
                                {
                                        case 11:
                                                XYZ xyz = new XYZ();
                                                xyz.X = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();
                                                xyz.Y = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();
                                                xyz.Z = this._reader.ValueAsDouble;

                                                value.Value = xyz;
                                                break;
                                        case 91:
                                                value.Value = this._reader.ValueAsInt;
                                                break;
                                        case 140:
                                                value.Value = this._reader.ValueAsDouble;
                                                break;
                                        case 330:
                                                template.ValueHandle = this._reader.ValueAsHandle;
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(value, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readCadValue)} method.", NotificationType.None);
                                                }
                                                break;
                                }

                                this._reader.ReadNext();
                        }

                        return template;
                }

                private bool readProxyObject(CadTemplate template, DxfMap map)
                {
                        CadProxyObjectTemplate tmp = template as CadProxyObjectTemplate;
                        ProxyObject proxy = template.CadObject as ProxyObject;

                        switch (this._reader.Code)
                        {
                                case 90:
                                case 94:
                                //Undocumented
                                case 97:
                                case 71:
                                        return true;
                                case 95:
                                        int format = this._reader.ValueAsInt;
                                        proxy.Version = (ACadVersion)(format & 0xFFFF);
                                        proxy.MaintenanceVersion = (short)(format >> 16);
                                        return true;
                                case 91:
                                        var classId = this._reader.ValueAsShort;
                                        if (this._builder.DocumentToBuild.Classes.TryGetByClassNumber(classId, out DxfClass dxfClass))
                                        {
                                                proxy.DxfClass = dxfClass;
                                        }
                                        return true;
                                case 161:
                                        return true;
                                case 162:
                                        return true;
                                case 310:
                                        if (proxy.BinaryData == null)
                                        {
                                                proxy.BinaryData = new MemoryStream();
                                        }
                                        proxy.BinaryData.Write(this._reader.ValueAsBinaryChunk, 0, this._reader.ValueAsBinaryChunk.Length);
                                        return true;
                                case 311:
                                        if (proxy.Data == null)
                                        {
                                                proxy.Data = new MemoryStream();
                                        }
                                        proxy.Data.Write(this._reader.ValueAsBinaryChunk, 0, this._reader.ValueAsBinaryChunk.Length);
                                        return true;
                                case 330:
                                case 340:
                                case 350:
                                case 360:
                                        tmp.Entries.Add(this._reader.ValueAsHandle);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.ProxyObject]);
                        }
                }

                private bool readObjectSubclassMap(CadTemplate template, DxfMap map)
                {
                        switch (this._reader.Code)
                        {
                                default:
                                        if (string.IsNullOrEmpty(this.currentSubclass))
                                        {
                                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[template.CadObject.SubclassMarker]);
                                        }
                                        else
                                        {
                                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[this.currentSubclass]);
                                        }
                        }
                }

                private bool readAnnotScaleObjectContextData(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadAnnotScaleObjectContextDataTemplate;
                        switch (this._reader.Code)
                        {
                                case 340:
                                        tmp.ScaleHandle = this._reader.ValueAsHandle;
                                        return true;
                                default:
                                        if (string.IsNullOrEmpty(this.currentSubclass))
                                        {
                                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[template.CadObject.SubclassMarker]);
                                        }
                                        else
                                        {
                                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[this.currentSubclass]);
                                        }
                        }
                }

                private bool readPlotSettings(CadTemplate template, DxfMap map)
                {
                        switch (this._reader.Code)
                        {
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.PlotSettings]);
                        }
                }

                private bool readEvaluationGraph(CadTemplate template, DxfMap map)
                {
                        CadEvaluationGraphTemplate tmp = template as CadEvaluationGraphTemplate;
                        EvaluationGraph evGraph = tmp.CadObject;

                        switch (this._reader.Code)
                        {
                                case 91:
                                        while (this._reader.Code == 91)
                                        {
                                                GraphNodeTemplate nodeTemplate = new GraphNodeTemplate();
                                                EvaluationGraph.Node node = nodeTemplate.Node;

                                                node.Index = this._reader.ValueAsInt;

                                                this._reader.ExpectedCode(93);
                                                node.Flags = this._reader.ValueAsInt;

                                                this._reader.ExpectedCode(95);
                                                node.NextNodeIndex = this._reader.ValueAsInt;

                                                this._reader.ExpectedCode(360);
                                                nodeTemplate.ExpressionHandle = this._reader.ValueAsHandle;

                                                this._reader.ExpectedCode(92);
                                                node.Data1 = this._reader.ValueAsInt;
                                                this._reader.ExpectedCode(92);
                                                node.Data2 = this._reader.ValueAsInt;
                                                this._reader.ExpectedCode(92);
                                                node.Data3 = this._reader.ValueAsInt;
                                                this._reader.ExpectedCode(92);
                                                node.Data4 = this._reader.ValueAsInt;

                                                this._reader.ReadNext();

                                                tmp.NodeTemplates.Add(nodeTemplate);
                                        }

                                        this.lockPointer = true;
                                        return true;
                                case 92:
                                        //Edges
                                        while (this._reader.Code == 92)
                                        {
                                                this._reader.ExpectedCode(93);
                                                this._reader.ExpectedCode(94);
                                                this._reader.ExpectedCode(91);
                                                this._reader.ExpectedCode(91);
                                                this._reader.ExpectedCode(92);
                                                this._reader.ExpectedCode(92);
                                                this._reader.ExpectedCode(92);
                                                this._reader.ExpectedCode(92);
                                                this._reader.ExpectedCode(92);

                                                this._reader.ReadNext();
                                        }

                                        this.lockPointer = true;
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.EvalGraph]);
                        }
                }

                private bool readLayout(CadTemplate template, DxfMap map)
                {
                        CadLayoutTemplate tmp = template as CadLayoutTemplate;

                        switch (this._reader.Code)
                        {
                                case 330 when template.OwnerHandle.HasValue:
                                        tmp.PaperSpaceBlockHandle = this._reader.ValueAsHandle;
                                        return true;
                                case 331:
                                        tmp.LasActiveViewportHandle = (this._reader.ValueAsHandle);
                                        return true;
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Layout]))
                                        {
                                                return this.readPlotSettings(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readGroup(CadTemplate template, DxfMap map)
                {
                        CadGroupTemplate tmp = template as CadGroupTemplate;

                        switch (this._reader.Code)
                        {
                                case 70:
                                        return true;
                                case 340:
                                        tmp.Handles.Add(this._reader.ValueAsHandle);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[template.CadObject.SubclassMarker]);
                        }
                }

                private bool readGeoData(CadTemplate template, DxfMap map)
                {
                        CadGeoDataTemplate tmp = template as CadGeoDataTemplate;

                        switch (this._reader.Code)
                        {
                                case 40 when tmp.CadObject.Version == GeoDataVersion.R2009:
                                        tmp.CadObject.ReferencePoint = new CSMath.XYZ(
                                                tmp.CadObject.ReferencePoint.X,
                                                this._reader.ValueAsDouble,
                                                tmp.CadObject.ReferencePoint.Z
                                                );
                                        return true;
                                case 41 when tmp.CadObject.Version == GeoDataVersion.R2009:
                                        tmp.CadObject.ReferencePoint = new CSMath.XYZ(
                                                this._reader.ValueAsDouble,
                                                tmp.CadObject.ReferencePoint.Y,
                                                tmp.CadObject.ReferencePoint.Z
                                                );
                                        return true;
                                case 42 when tmp.CadObject.Version == GeoDataVersion.R2009:
                                        tmp.CadObject.ReferencePoint = new CSMath.XYZ(
                                                tmp.CadObject.ReferencePoint.X,
                                                tmp.CadObject.ReferencePoint.Y,
                                                this._reader.ValueAsDouble
                                                );
                                        return true;
                                case 46 when tmp.CadObject.Version == GeoDataVersion.R2009:
                                        tmp.CadObject.HorizontalUnitScale = this._reader.ValueAsDouble;
                                        return true;
                                case 52 when tmp.CadObject.Version == GeoDataVersion.R2009:
                                        double angle = System.Math.PI / 2.0 - this._reader.ValueAsAngle;
                                        tmp.CadObject.NorthDirection = new CSMath.XY(Math.Cos(angle), Math.Sin(angle));
                                        return true;
                                // Number of Geo-Mesh points
                                case 93:
                                        var npts = this._reader.ValueAsInt;
                                        for (int i = 0; i < npts; i++)
                                        {
                                                this._reader.ReadNext();
                                                double sourceX = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();
                                                double sourceY = this._reader.ValueAsDouble;

                                                this._reader.ReadNext();
                                                double destX = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();
                                                double destY = this._reader.ValueAsDouble;

                                                tmp.CadObject.Points.Add(new GeoData.GeoMeshPoint
                                                {
                                                        Source = new CSMath.XY(sourceX, sourceY),
                                                        Destination = new CSMath.XY(destX, destY)
                                                });
                                        }
                                        return true;
                                // Number of Geo-Mesh points
                                case 96:
                                        var nfaces = this._reader.ValueAsInt;
                                        for (int i = 0; i < nfaces; i++)
                                        {
                                                this._reader.ReadNext();
                                                Debug.Assert(this._reader.Code == 97);
                                                int index1 = this._reader.ValueAsInt;
                                                this._reader.ReadNext();
                                                Debug.Assert(this._reader.Code == 98);
                                                int index2 = this._reader.ValueAsInt;
                                                this._reader.ReadNext();
                                                Debug.Assert(this._reader.Code == 99);
                                                int index3 = this._reader.ValueAsInt;

                                                tmp.CadObject.Faces.Add(new GeoData.GeoMeshFace
                                                {
                                                        Index1 = index1,
                                                        Index2 = index2,
                                                        Index3 = index3
                                                });
                                        }
                                        return true;
                                case 303:
                                        tmp.CadObject.CoordinateSystemDefinition += this._reader.ValueAsString;
                                        return true;
                                //Obsolete codes for version GeoDataVersion.R2009
                                case 3:
                                case 4:
                                case 14:
                                case 24:
                                case 15:
                                case 25:
                                case 43:
                                case 44:
                                case 45:
                                case 94:
                                case 293:
                                case 16:
                                case 26:
                                case 17:
                                case 27:
                                case 54:
                                case 140:
                                case 304:
                                case 292:
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                        }
                }

                private bool readMaterial(CadTemplate template, DxfMap map)
                {
                        CadMaterialTemplate tmp = template as CadMaterialTemplate;
                        List<double> arr = null;

                        switch (this._reader.Code)
                        {
                                case 43:
                                        arr = new();
                                        for (int i = 0; i < 16; i++)
                                        {
                                                Debug.Assert(this._reader.Code == 43);

                                                arr.Add(this._reader.ValueAsDouble);

                                                this._reader.ReadNext();
                                        }

                                        tmp.CadObject.DiffuseMatrix = new CSMath.Matrix4(arr.ToArray());
                                        return this.checkObjectEnd(template, map, this.readMaterial);
                                case 47:
                                        arr = new();
                                        for (int i = 0; i < 16; i++)
                                        {
                                                Debug.Assert(this._reader.Code == 47);

                                                arr.Add(this._reader.ValueAsDouble);

                                                this._reader.ReadNext();
                                        }

                                        tmp.CadObject.SpecularMatrix = new CSMath.Matrix4(arr.ToArray());
                                        return this.checkObjectEnd(template, map, this.readMaterial);
                                case 49:
                                        arr = new();
                                        for (int i = 0; i < 16; i++)
                                        {
                                                Debug.Assert(this._reader.Code == 49);

                                                arr.Add(this._reader.ValueAsDouble);

                                                this._reader.ReadNext();
                                        }

                                        tmp.CadObject.ReflectionMatrix = new CSMath.Matrix4(arr.ToArray());
                                        return this.checkObjectEnd(template, map, this.readMaterial);
                                case 142:
                                        arr = new();
                                        for (int i = 0; i < 16; i++)
                                        {
                                                Debug.Assert(this._reader.Code == 142);

                                                arr.Add(this._reader.ValueAsDouble);

                                                this._reader.ReadNext();
                                        }

                                        tmp.CadObject.OpacityMatrix = new CSMath.Matrix4(arr.ToArray());
                                        return this.checkObjectEnd(template, map, this.readMaterial);
                                case 144:
                                        arr = new();
                                        for (int i = 0; i < 16; i++)
                                        {
                                                Debug.Assert(this._reader.Code == 144);

                                                arr.Add(this._reader.ValueAsDouble);

                                                this._reader.ReadNext();
                                        }

                                        tmp.CadObject.BumpMatrix = new CSMath.Matrix4(arr.ToArray());
                                        return this.checkObjectEnd(template, map, this.readMaterial);
                                case 147:
                                        arr = new();
                                        for (int i = 0; i < 16; i++)
                                        {
                                                Debug.Assert(this._reader.Code == 147);

                                                arr.Add(this._reader.ValueAsDouble);

                                                this._reader.ReadNext();
                                        }

                                        tmp.CadObject.RefractionMatrix = new CSMath.Matrix4(arr.ToArray());
                                        return this.checkObjectEnd(template, map, this.readMaterial);
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                        }
                }

                private bool readScale(CadTemplate template, DxfMap map)
                {
                        switch (this._reader.Code)
                        {
                                // Undocumented codes
                                case 70:
                                        //Always 0
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Scale]);
                        }
                }

                private void readLinkedData(CadTemplate template, DxfMap map)
                {
                        CadTableContentTemplate tmp = template as CadTableContentTemplate;
                        LinkedData linkedData = tmp.CadObject;

                        this._reader.ReadNext();

                        while (this._reader.DxfCode != DxfCode.Start && this._reader.DxfCode != DxfCode.Subclass)
                        {
                                switch (this._reader.Code)
                                {
                                        default:
                                                if (!this.tryAssignCurrentValue(linkedData, map.SubClasses[DxfSubclassMarker.LinkedData]))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readLinkedData)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private bool readTableContent(CadTemplate template, DxfMap map)
                {
                        switch (this._reader.Code)
                        {
                                case 100 when this._reader.ValueAsString.Equals(DxfSubclassMarker.TableContent, StringComparison.InvariantCultureIgnoreCase):
                                        this.readTableContentSubclass(template, map);
                                        this.lockPointer = true;
                                        return true;
                                case 100 when this._reader.ValueAsString.Equals(DxfSubclassMarker.FormattedTableData, StringComparison.InvariantCultureIgnoreCase):
                                        this.readFormattedTableDataSubclass(template, map);
                                        this.lockPointer = true;
                                        return true;
                                case 100 when this._reader.ValueAsString.Equals(DxfSubclassMarker.LinkedTableData, StringComparison.InvariantCultureIgnoreCase):
                                        this.readLinkedTableDataSubclass(template, map);
                                        this.lockPointer = true;
                                        return true;
                                case 100 when this._reader.ValueAsString.Equals(DxfSubclassMarker.LinkedData, StringComparison.InvariantCultureIgnoreCase):
                                        this.readLinkedData(template, map);
                                        this.lockPointer = true;
                                        return true;
                                default:
                                        return false;
                        }
                }

                private void readTableContentSubclass(CadTemplate template, DxfMap map)
                {
                        CadTableContentTemplate tmp = template as CadTableContentTemplate;
                        TableContent tableContent = tmp.CadObject;

                        this._reader.ReadNext();

                        while (this._reader.DxfCode != DxfCode.Start && this._reader.DxfCode != DxfCode.Subclass)
                        {
                                switch (this._reader.Code)
                                {
                                        case 340:
                                                tmp.SytleHandle = this._reader.ValueAsHandle;
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(tableContent, map.SubClasses[DxfSubclassMarker.TableContent]))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readTableContentSubclass)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readFormattedTableDataSubclass(CadTemplate template, DxfMap map)
                {
                        CadTableContentTemplate tmp = template as CadTableContentTemplate;
                        FormattedTableData formattedTable = tmp.CadObject;

                        this._reader.ReadNext();

                        TableEntity.CellRange cellRange = null;
                        while (this._reader.DxfCode != DxfCode.Start && this._reader.DxfCode != DxfCode.Subclass)
                        {
                                switch (this._reader.Code)
                                {
                                        case 90:
                                                break;
                                        case 91:
                                                if (cellRange == null)
                                                {
                                                        cellRange = new();
                                                        formattedTable.MergedCellRanges.Add(cellRange);
                                                }
                                                cellRange.TopRowIndex = this._reader.ValueAsInt;
                                                break;
                                        case 92:
                                                if (cellRange == null)
                                                {
                                                        cellRange = new();
                                                        formattedTable.MergedCellRanges.Add(cellRange);
                                                }
                                                cellRange.LeftColumnIndex = this._reader.ValueAsInt;
                                                break;
                                        case 93:
                                                if (cellRange == null)
                                                {
                                                        cellRange = new();
                                                        formattedTable.MergedCellRanges.Add(cellRange);
                                                }
                                                cellRange.BottomRowIndex = this._reader.ValueAsInt;
                                                break;
                                        case 94:
                                                if (cellRange == null)
                                                {
                                                        cellRange = new();
                                                        formattedTable.MergedCellRanges.Add(cellRange);
                                                }
                                                cellRange.RightColumnIndex = this._reader.ValueAsInt;
                                                cellRange = null;
                                                break;
                                        case 300 when this._reader.ValueAsString.Equals("TABLEFORMAT", StringComparison.InvariantCultureIgnoreCase):
                                                this.readStyleOverride(new CadCellStyleTemplate(formattedTable.CellStyleOverride));
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(formattedTable, map.SubClasses[DxfSubclassMarker.FormattedTableData]))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readFormattedTableDataSubclass)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readLinkedTableDataSubclass(CadTemplate template, DxfMap map)
                {
                        CadTableContentTemplate tmp = template as CadTableContentTemplate;
                        TableContent tableContent = tmp.CadObject;

                        this._reader.ReadNext();

                        while (this._reader.DxfCode != DxfCode.Start && this._reader.DxfCode != DxfCode.Subclass)
                        {
                                switch (this._reader.Code)
                                {
                                        case 90:
                                                //Column count
                                                break;
                                        case 91:
                                                //Row count
                                                break;
                                        //Unknown
                                        case 92:
                                                break;
                                        case 300 when this._reader.ValueAsString.Equals(DxfFileToken.ObjectTableColumn, StringComparison.InvariantCultureIgnoreCase):
                                                //Read Column
                                                this.readTableColumn();
                                                break;
                                        case 301 when this._reader.ValueAsString.Equals(DxfFileToken.ObjectTableRow, StringComparison.InvariantCultureIgnoreCase):
                                                //Read Row
                                                this.readTableRow();
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(tableContent, map.SubClasses[DxfSubclassMarker.LinkedTableData]))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readLinkedTableDataSubclass)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                this._reader.ReadNext();
                        }
                }


                private TableEntity.Column readTableColumn()
                {
                        this._reader.ReadNext();

                        TableEntity.Column column = new TableEntity.Column();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.LinkedTableDataColumn_BEGIN, StringComparison.InvariantCultureIgnoreCase):
                                                this.readLinkedTableColumn(column);
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.FormattedTableDataColumn_BEGIN, StringComparison.InvariantCultureIgnoreCase):
                                                this.readFormattedTableColumn(column);
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.ObjectTableColumnBegin, StringComparison.InvariantCultureIgnoreCase):
                                                this.readTableColumn(column);
                                                end = true;
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readTableColumn)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        return column;
                                }

                                this._reader.ReadNext();
                        }

                        return column;
                }

                private TableEntity.Row readTableRow()
                {
                        this._reader.ReadNext();

                        TableEntity.Row row = new TableEntity.Row();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.LinkedTableDataRow_BEGIN, StringComparison.InvariantCultureIgnoreCase):
                                                this.readLinkedTableRow(row);
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.FormattedTableDataRow_BEGIN, StringComparison.InvariantCultureIgnoreCase):
                                                this.readFormattedTableRow(row);
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.ObjectTableRowBegin, StringComparison.InvariantCultureIgnoreCase):
                                                this.readTableRow(row);
                                                end = true;
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readTableRow)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        return row;
                                }

                                this._reader.ReadNext();
                        }

                        return row;
                }

                private void readTableRow(TableEntity.Row row)
                {
                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 40:
                                                row.Height = this._reader.ValueAsDouble;
                                                break;
                                        case 90:
                                                //styleID
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("TABLEROW_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readTableRow)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readFormattedTableRow(TableEntity.Row row)
                {
                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 300 when this._reader.ValueAsString.Equals("ROWTABLEFORMAT", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals("TABLEFORMAT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readStyleOverride(new CadCellStyleTemplate(row.CellStyleOverride));
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("FORMATTEDTABLEDATAROW_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readFormattedTableRow)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readTableColumn(TableEntity.Column column)
                {
                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("TABLECOLUMN_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 1:
                                                end = true;
                                                break;
                                        case 40:
                                                column.Width = this._reader.ValueAsDouble;
                                                break;
                                        case 90:
                                                //StyleId
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("TABLECOLUMN_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readTableColumn)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readLinkedTableColumn(TableEntity.Column column)
                {
                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.LinkedTableDataColumn_BEGIN, StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 1:
                                                end = true;
                                                break;
                                        case 91:
                                                column.CustomData = this._reader.ValueAsInt;
                                                break;
                                        case 300:
                                                column.Name = this._reader.ValueAsString;
                                                break;
                                        case 301 when this._reader.ValueAsString.Equals(DxfFileToken.CustomData, StringComparison.InvariantCultureIgnoreCase):
                                                this.readCustomData();
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals(DxfFileToken.LinkedTableDataColumn_END, StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readLinkedTableColumn)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readLinkedTableRow(TableEntity.Row row)
                {
                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals(DxfFileToken.LinkedTableDataRow_BEGIN, StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 90:
                                                break;
                                        case 91:
                                                row.CustomData = this._reader.ValueAsInt;
                                                break;
                                        case 300 when this._reader.ValueAsString.Equals(DxfFileToken.ObjectCell, StringComparison.InvariantCultureIgnoreCase):
                                                this.readCell();
                                                break;
                                        case 301 when this._reader.ValueAsString.Equals(DxfFileToken.CustomData, StringComparison.InvariantCultureIgnoreCase):
                                                this.readCustomData();
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals(DxfFileToken.LinkedTableDataRow_END, StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readLinkedTableRow)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private TableEntity.Cell readCell()
                {
                        this._reader.ReadNext();

                        TableEntity.Cell cell = new TableEntity.Cell();
                        CadTableCellTemplate template = new CadTableCellTemplate(cell);

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("LINKEDTABLEDATACELL_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readLinkedTableCell(cell);
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals("FORMATTEDTABLEDATACELL_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readFormattedTableCell(cell);
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals("TABLECELL_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readTableCell(cell);
                                                end = true;
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readCell)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        return cell;
                                }

                                this._reader.ReadNext();
                        }

                        return cell;
                }

                private void readTableCell(TableEntity.Cell cell)
                {
                        var map = DxfClassMap.Create(cell.GetType(), "TABLECELL_BEGIN");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        //Unknown
                                        case 40:
                                        case 41:
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("TABLECELL_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        case 330:
                                                //Unknown handle
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(cell, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readTableCell)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readFormattedTableCell(TableEntity.Cell cell)
                {
                        var map = DxfClassMap.Create(cell.GetType(), "FORMATTEDTABLEDATACELL_BEGIN");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 300 when this._reader.ValueAsString.Equals("CELLTABLEFORMAT", StringComparison.InvariantCultureIgnoreCase):
                                                this.readCellTableFormat(cell);
                                                continue;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("FORMATTEDTABLEDATACELL_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(cell, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readFormattedTableCell)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readCellTableFormat(TableEntity.Cell cell)
                {
                        var map = DxfClassMap.Create(cell.GetType(), "CELLTABLEFORMAT");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.Code == 1)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("TABLEFORMAT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readStyleOverride(new CadCellStyleTemplate(cell.StyleOverride));
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals("CELLSTYLE_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readCellStyle(new CadCellStyleTemplate());
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(cell, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readCellTableFormat)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readCellStyle(CadCellStyleTemplate template)
                {
                        //var map = DxfClassMap.Create(cell.GetType(), "CELLTABLEFORMAT");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.Code != 1)
                        {
                                switch (this._reader.Code)
                                {
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("CELLSTYLE_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                //if (!this.tryAssignCurrentValue(cell, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readCellStyle)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readLinkedTableCell(TableEntity.Cell cell)
                {
                        var map = DxfClassMap.Create(cell.GetType(), "LINKEDTABLEDATACELL_BEGIN");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 95:
                                                //BL 95 Number of cell contents
                                                break;
                                        case 301 when this._reader.ValueAsString.Equals(DxfFileToken.CustomData, StringComparison.InvariantCultureIgnoreCase):
                                                this.readCustomData();
                                                break;
                                        case 302 when this._reader.ValueAsString.Equals("CONTENT", StringComparison.InvariantCultureIgnoreCase):
                                                var c = this.readLinkedTableCellContent();
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("LINKEDTABLEDATACELL_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(cell, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readLinkedTableCell)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private CadTableCellContentTemplate readLinkedTableCellContent()
                {
                        TableEntity.CellContent content = new TableEntity.CellContent();
                        CadTableCellContentTemplate template = new CadTableCellContentTemplate(content);
                        var map = DxfClassMap.Create(content.GetType(), "CONTENT");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("FORMATTEDCELLCONTENT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                readFormattedCellContent();
                                                end = true;
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals("CELLCONTENT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                readCellContent(template);
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(content, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readLinkedTableCellContent)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }

                        return template;
                }

                private void readCellContent(CadTableCellContentTemplate template)
                {
                        TableEntity.CellContent content = template.Content;
                        var map = DxfClassMap.Create(content.GetType(), "CELLCONTENT_BEGIN");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 91:
                                                break;
                                        case 300 when this._reader.ValueAsString.Equals("VALUE", StringComparison.InvariantCultureIgnoreCase):
                                                this.readDataMapValue();
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("CELLCONTENT_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        case 340:
                                                template.BlockRecordHandle = this._reader.ValueAsHandle;
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(content, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readCellContent)} {this._reader.Position}.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readFormattedCellContent()
                {
                        TableEntity.ContentFormat format = new();
                        CadTableCellContentFormatTemplate template = new CadTableCellContentFormatTemplate(format);
                        var map = DxfClassMap.Create(format.GetType(), "FORMATTEDCELLCONTENT");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 300 when this._reader.ValueAsString.Equals("CONTENTFORMAT", StringComparison.InvariantCultureIgnoreCase):
                                                readContentFormat(template);
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("FORMATTEDCELLCONTENT_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(format, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readFormattedCellContent)} method.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readContentFormat(CadTableCellContentFormatTemplate template)
                {
                        var format = template.Format;
                        var map = DxfClassMap.Create(format.GetType(), "CONTENTFORMAT_BEGIN");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("CONTENTFORMAT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("CONTENTFORMAT_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        case 340:
                                                template.TextStyleHandle = this._reader.ValueAsHandle;
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(format, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readContentFormat)} method.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readFormattedTableColumn(TableEntity.Column column)
                {
                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 300 when this._reader.ValueAsString.Equals("COLUMNTABLEFORMAT", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals("TABLEFORMAT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readStyleOverride(new CadCellStyleTemplate(column.CellStyleOverride));
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals(DxfFileToken.FormattedTableDataColumn_END, StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readFormattedTableColumn)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readStyleOverride(CadCellStyleTemplate template)
                {
                        var style = template.Format as TableEntity.CellStyle;
                        var mapstyle = DxfClassMap.Create(style.GetType(), "TABLEFORMAT_STYLE");
                        var mapformat = DxfClassMap.Create(typeof(TableEntity.ContentFormat), "TABLEFORMAT_BEGIN");

                        this._reader.ReadNext();

                        bool end = false;
                        TableEntity.CellEdgeFlags currBorder = TableEntity.CellEdgeFlags.Unknown;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 95:
                                                currBorder = (TableEntity.CellEdgeFlags)this._reader.ValueAsInt;
                                                break;
                                        case 1 when this._reader.ValueAsString.Equals("TABLEFORMAT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 300 when this._reader.ValueAsString.Equals("CONTENTFORMAT", StringComparison.InvariantCultureIgnoreCase):
                                                readContentFormat(new CadTableCellContentFormatTemplate(new TableEntity.ContentFormat()));
                                                break;
                                        case 301 when this._reader.ValueAsString.Equals("MARGIN", StringComparison.InvariantCultureIgnoreCase):
                                                this.readCellMargin(template);
                                                break;
                                        case 302 when this._reader.ValueAsString.Equals("GRIDFORMAT", StringComparison.InvariantCultureIgnoreCase):
                                                TableEntity.CellBorder border = new TableEntity.CellBorder(currBorder);
                                                this.readGridFormat(template, border);
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("TABLEFORMAT_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(style, mapstyle) && !this.tryAssignCurrentValue(style, mapformat))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readStyleOverride)} method.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readGridFormat(CadCellStyleTemplate template, TableEntity.CellBorder border)
                {
                        var map = DxfClassMap.Create(border.GetType(), nameof(TableEntity.CellBorder));

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("GRIDFORMAT_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 62:
                                                border.Color = new Color(this._reader.ValueAsShort);
                                                break;
                                        case 92:
                                                border.LineWeight = (LineWeightType)this._reader.ValueAsInt;
                                                break;
                                        case 93:
                                                border.IsInvisible = this._reader.ValueAsBool;
                                                break;
                                        case 340:
                                                template.BorderLinetypePairs.Add(new Tuple<TableEntity.CellBorder, ulong>(border, this._reader.ValueAsHandle));
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("GRIDFORMAT_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(border, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readGridFormat)} method.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readCellMargin(CadCellStyleTemplate template)
                {
                        var style = template.Format as TableEntity.CellStyle;

                        this._reader.ReadNext();

                        bool end = false;
                        int i = 0;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("CELLMARGIN_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 40:
                                                switch (i)
                                                {
                                                        case 0:
                                                                style.VerticalMargin = this._reader.ValueAsDouble;
                                                                break;
                                                        case 1:
                                                                style.HorizontalMargin = this._reader.ValueAsDouble;
                                                                break;
                                                        case 2:
                                                                style.BottomMargin = this._reader.ValueAsDouble;
                                                                break;
                                                        case 3:
                                                                style.RightMargin = this._reader.ValueAsDouble;
                                                                break;
                                                        case 4:
                                                                style.MarginHorizontalSpacing = this._reader.ValueAsDouble;
                                                                break;
                                                        case 5:
                                                                style.MarginVerticalSpacing = this._reader.ValueAsDouble;
                                                                break;
                                                }

                                                i++;
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("CELLMARGIN_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readCellMargin)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readCustomData()
                {
                        this._reader.ReadNext();

                        int ndata = 0;
                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 1 when this._reader.ValueAsString.Equals("DATAMAP_BEGIN", StringComparison.InvariantCultureIgnoreCase):
                                                break;
                                        case 90:
                                                ndata = this._reader.ValueAsInt;
                                                break;
                                        case 300:
                                                //Name
                                                break;
                                        case 301 when this._reader.ValueAsString.Equals("DATAMAP_VALUE", StringComparison.InvariantCultureIgnoreCase):
                                                this.readDataMapValue();
                                                break;
                                        case 309:
                                                end = this._reader.ValueAsString.Equals("DATAMAP_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readCustomData)} method.", NotificationType.None);
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private void readDataMapValue()
                {
                        TableEntity.CellValue value = new TableEntity.CellValue();
                        var map = DxfClassMap.Create(value.GetType(), "DATAMAP_VALUE");

                        this._reader.ReadNext();

                        bool end = false;
                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 11:
                                        case 21:
                                        case 31:
                                                //Value as point
                                                break;
                                        case 91:
                                        case 92:
                                                //Value as int
                                                break;
                                        case 140:
                                                //Value as double
                                                break;
                                        case 310:
                                                //Value as byte array
                                                break;
                                        case 304:
                                                end = this._reader.ValueAsString.Equals("ACVALUE_END", StringComparison.InvariantCultureIgnoreCase);
                                                break;
                                        default:
                                                if (!this.tryAssignCurrentValue(value, map))
                                                {
                                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} value {this._reader.ValueAsString} at {nameof(readDataMapValue)} method.", NotificationType.None);
                                                }
                                                break;
                                }

                                if (end)
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private bool readVisualStyle(CadTemplate template, DxfMap map)
                {
                        switch (this._reader.Code)
                        {
                                // Undocumented codes
                                case 176:
                                case 177:
                                case 420:
                                        return true;
                                default:
                                        //Avoid noise while is not implemented
                                        return true;
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.VisualStyle]);
                        }
                }

                private bool readSpatialFilter(CadTemplate template, DxfMap map)
                {
                        CadSpatialFilterTemplate tmp = template as CadSpatialFilterTemplate;
                        SpatialFilter filter = tmp.CadObject as SpatialFilter;

                        switch (this._reader.Code)
                        {
                                case 10:
                                        filter.BoundaryPoints.Add(new CSMath.XY(this._reader.ValueAsDouble, 0));
                                        return true;
                                case 20:
                                        var pt = filter.BoundaryPoints.LastOrDefault();
                                        filter.BoundaryPoints.Add(new CSMath.XY(pt.X, this._reader.ValueAsDouble));
                                        return true;
                                case 40:
                                        if (filter.ClipFrontPlane && !tmp.HasFrontPlane)
                                        {
                                                filter.FrontDistance = this._reader.ValueAsDouble;
                                                tmp.HasFrontPlane = true;
                                        }

                                        double[] array = new double[16]
                                        {
                                                0.0, 0.0, 0.0, 0.0,
                                                0.0, 0.0, 0.0, 0.0,
                                                0.0, 0.0, 0.0, 0.0,
                                                0.0, 0.0, 0.0, 1.0
                                        };

                                        for (int i = 0; i < 12; i++)
                                        {
                                                array[i] = this._reader.ValueAsDouble;

                                                if (i < 11)
                                                {
                                                        this._reader.ReadNext();
                                                }
                                        }

                                        if (tmp.InsertTransformRead)
                                        {
                                                filter.InsertTransform = new Matrix4(array);
                                                tmp.InsertTransformRead = true;
                                        }
                                        else
                                        {
                                                filter.InverseInsertTransform = new Matrix4(array);
                                        }

                                        return true;
                                case 73:
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.SpatialFilter]);
                        }
                }

                private bool readMLineStyle(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadMLineStyleTemplate;
                        var mLineStyle = template.CadObject as MLineStyle;

                        switch (this._reader.Code)
                        {
                                case 6:
                                        var t = tmp.ElementTemplates.LastOrDefault();
                                        if (t == null)
                                        {
                                                return true;
                                        }
                                        t.LineTypeName = this._reader.ValueAsString;
                                        return true;
                                case 49:
                                        MLineStyle.Element element = new MLineStyle.Element();
                                        CadMLineStyleTemplate.ElementTemplate elementTemplate = new CadMLineStyleTemplate.ElementTemplate(element);
                                        element.Offset = this._reader.ValueAsDouble;

                                        tmp.ElementTemplates.Add(elementTemplate);
                                        mLineStyle.AddElement(element);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                        }
                }

                private bool readTableStyle(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadTableStyleTemplate;
                        var style = tmp.CadObject;
                        var cellStyle = tmp.CurrentCellStyleTemplate?.CellStyle;

                        switch (this._reader.Code)
                        {
                                case 7:
                                        tmp.CreateCurrentCellStyleTemplate();
                                        tmp.CurrentCellStyleTemplate.TextStyleName = this._reader.ValueAsString;
                                        return true;
                                case 94:
                                        cellStyle.Alignment = this._reader.ValueAsInt;
                                        return true;
                                case 62:
                                        cellStyle.Color = new Color(this._reader.ValueAsShort);
                                        return true;
                                case 63:
                                        cellStyle.BackgroundColor = new Color(this._reader.ValueAsShort);
                                        return true;
                                case 140:
                                        cellStyle.TextHeight = this._reader.ValueAsDouble;
                                        return true;
                                case 170:
                                        cellStyle.CellAlignment = (TableEntity.Cell.CellAlignmentType)this._reader.ValueAsShort;
                                        return true;
                                case 283:
                                        cellStyle.IsFillColorOn = this._reader.ValueAsBool;
                                        return true;
                                case 90:
                                        cellStyle.Type = (TableEntity.CellStyleType)this._reader.ValueAsShort;
                                        return true;
                                case 91:
                                        cellStyle.StyleClass = (TableEntity.CellStyleClass)this._reader.ValueAsShort;
                                        return true;
                                case 1:
                                        //Undocumented
                                        return true;
                                case 274:
                                        cellStyle.TopBorder.LineWeight = (LineWeightType)this._reader.ValueAsInt;
                                        return true;
                                case 275:
                                        cellStyle.HorizontalInsideBorder.LineWeight = (LineWeightType)this._reader.ValueAsInt;
                                        return true;
                                case 276:
                                        cellStyle.BottomBorder.LineWeight = (LineWeightType)this._reader.ValueAsInt;
                                        return true;
                                case 277:
                                        cellStyle.LeftBorder.LineWeight = (LineWeightType)this._reader.ValueAsInt;
                                        return true;
                                case 278:
                                        cellStyle.VerticalInsideBorder.LineWeight = (LineWeightType)this._reader.ValueAsInt;
                                        return true;
                                case 279:
                                        cellStyle.RightBorder.LineWeight = (LineWeightType)this._reader.ValueAsInt;
                                        return true;
                                case 284:
                                        cellStyle.TopBorder.IsInvisible = this._reader.ValueAsBool;
                                        return true;
                                case 285:
                                        cellStyle.HorizontalInsideBorder.IsInvisible = this._reader.ValueAsBool;
                                        return true;
                                case 286:
                                        cellStyle.BottomBorder.IsInvisible = this._reader.ValueAsBool;
                                        return true;
                                case 287:
                                        cellStyle.LeftBorder.IsInvisible = this._reader.ValueAsBool;
                                        return true;
                                case 288:
                                        cellStyle.VerticalInsideBorder.IsInvisible = this._reader.ValueAsBool;
                                        return true;
                                case 289:
                                        cellStyle.RightBorder.IsInvisible = this._reader.ValueAsBool;
                                        return true;
                                case 64:
                                        cellStyle.TopBorder.Color = new Color(this._reader.ValueAsShort);
                                        return true;
                                case 65:
                                        cellStyle.HorizontalInsideBorder.Color = new Color(this._reader.ValueAsShort);
                                        return true;
                                case 66:
                                        cellStyle.BottomBorder.Color = new Color(this._reader.ValueAsShort);
                                        return true;
                                case 67:
                                        cellStyle.LeftBorder.Color = new Color(this._reader.ValueAsShort);
                                        return true;
                                case 68:
                                        cellStyle.VerticalInsideBorder.Color = new Color(this._reader.ValueAsShort);
                                        return true;
                                case 69:
                                        cellStyle.RightBorder.Color = new Color(this._reader.ValueAsShort);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                        }
                }

                private bool readMLeaderStyle(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadMLeaderStyleTemplate;

                        switch (this._reader.Code)
                        {
                                case 179:
                                        return true;
                                case 340:
                                        tmp.LeaderLineTypeHandle = this._reader.ValueAsHandle;
                                        return true;
                                case 342:
                                        tmp.MTextStyleHandle = this._reader.ValueAsHandle;
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                        }
                }

                private bool readEvaluationExpression(CadTemplate template, DxfMap map)
                {
                        CadEvaluationExpressionTemplate tmp = template as CadEvaluationExpressionTemplate;

                        switch (this._reader.Code)
                        {
                                case 1:
                                        this._reader.ExpectedCode(70);
                                        this._reader.ExpectedCode(140);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.EvalGraphExpr]);
                        }
                }

                private bool readBlockElement(CadTemplate template, DxfMap map)
                {
                        CadBlockElementTemplate tmp = template as CadBlockElementTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockElement]))
                                        {
                                                return this.readEvaluationExpression(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockAction(CadTemplate template, DxfMap map)
                {
                        CadBlockActionTemplate tmp = template as CadBlockActionTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockAction]))
                                        {
                                                return this.readBlockElement(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockActionBasePt(CadTemplate template, DxfMap map)
                {
                        CadBlockActionBasePtTemplate tmp = template as CadBlockActionBasePtTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockActionBasePt]))
                                        {
                                                return this.readBlockAction(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockRotationAction(CadTemplate template, DxfMap map)
                {
                        CadBlockRotationActionTemplate tmp = template as CadBlockRotationActionTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockRotationAction]))
                                        {
                                                return this.readBlockActionBasePt(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockParameter(CadTemplate template, DxfMap map)
                {
                        CadBlockParameterTemplate tmp = template as CadBlockParameterTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockParameter]))
                                        {
                                                return this.readBlockElement(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlock1PtParameter(CadTemplate template, DxfMap map)
                {
                        CadBlock1PtParameterTemplate tmp = template as CadBlock1PtParameterTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Block1PtParameter]))
                                        {
                                                return this.readBlockParameter(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlock2PtParameter(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadBlock2PtParameterTemplate;

                        switch (this._reader.Code)
                        {
                                //Stores always 4 entries using this code
                                case 91:
                                        return true;
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map))
                                        {
                                                return this.readBlockParameter(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockVisibilityParameter(CadTemplate template, DxfMap map)
                {
                        CadBlockVisibilityParameterTemplate tmp = template as CadBlockVisibilityParameterTemplate;

                        switch (this._reader.Code)
                        {
                                case 92:
                                        var stateCount = this._reader.ValueAsInt;
                                        for (int i = 0; i < stateCount; i++)
                                        {
                                                this._reader.ReadNext();
                                                tmp.StateTemplates.Add(this.readState());
                                        }
                                        return true;
                                case 93 when this.currentSubclass == DxfSubclassMarker.BlockVisibilityParameter:
                                        var entityCount = this._reader.ValueAsInt;
                                        for (int i = 0; i < entityCount; i++)
                                        {
                                                this._reader.ReadNext();
                                                tmp.EntityHandles.Add(this._reader.ValueAsHandle);
                                        }
                                        return true;
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockVisibilityParameter]))
                                        {
                                                return this.readBlock1PtParameter(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockRotationParameter(CadTemplate template, DxfMap map)
                {
                        var tmp = template as CadBlockRotationParameterTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map))
                                        {
                                                return this.readBlock2PtParameter(template, map);
                                        }
                                        return true;
                        }
                }

                private CadBlockVisibilityParameterTemplate.StateTemplate readState()
                {
                        var state = new BlockVisibilityParameter.State();
                        var template = new CadBlockVisibilityParameterTemplate.StateTemplate(state);

                        List<int> expectedCodes = new List<int>();
                        expectedCodes.Add(303);
                        expectedCodes.Add(94);
                        expectedCodes.Add(95);

                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                expectedCodes.Remove(this._reader.Code);

                                switch (this._reader.Code)
                                {
                                        case 303:
                                                state.Name = this._reader.ValueAsString;
                                                break;
                                        case 94:
                                                var count = this._reader.ValueAsInt;
                                                for (int i = 0; i < count; i++)
                                                {
                                                        this._reader.ReadNext();
                                                        template.EntityHandles.Add(this._reader.ValueAsHandle);
                                                }
                                                break;
                                        case 95:
                                                count = this._reader.ValueAsInt;
                                                for (int i = 0; i < count; i++)
                                                {
                                                        this._reader.ReadNext();
                                                        template.ExpressionHandles.Add(this._reader.ValueAsHandle);
                                                }
                                                break;
                                        default:
                                                return template;
                                }

                                if (!expectedCodes.Any())
                                {
                                        break;
                                }

                                this._reader.ReadNext();
                        }

                        return template;
                }

                private bool readBlockGrip(CadTemplate template, DxfMap map)
                {
                        CadBlockGripTemplate tmp = template as CadBlockGripTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockGrip]))
                                        {
                                                return this.readBlockElement(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockRotationGrip(CadTemplate template, DxfMap map)
                {
                        CadBlockRotationGripTemplate tmp = template as CadBlockRotationGripTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockRotationGrip]))
                                        {
                                                return this.readBlockGrip(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockVisibilityGrip(CadTemplate template, DxfMap map)
                {
                        CadBlockVisibilityGripTemplate tmp = template as CadBlockVisibilityGripTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockVisibilityGrip]))
                                        {
                                                return this.readBlockGrip(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readBlockRepresentationData(CadTemplate template, DxfMap map)
                {
                        CadBlockRepresentationDataTemplate tmp = template as CadBlockRepresentationDataTemplate;

                        switch (this._reader.Code)
                        {
                                case 340:
                                        tmp.BlockHandle = this._reader.ValueAsHandle;
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                        }
                }

                private bool readBlockGripExpression(CadTemplate template, DxfMap map)
                {
                        CadBlockGripExpressionTemplate tmp = template as CadBlockGripExpressionTemplate;

                        switch (this._reader.Code)
                        {
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.BlockGripExpression]))
                                        {
                                                return this.readEvaluationExpression(template, map);
                                        }
                                        return true;
                        }
                }

                private bool readXRecord(CadTemplate template, DxfMap map)
                {
                        CadXRecordTemplate tmp = template as CadXRecordTemplate;

                        switch (this._reader.Code)
                        {
                                case 100 when this._reader.ValueAsString == DxfSubclassMarker.XRecord:
                                        this.readXRecordEntries(tmp);
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.XRecord]);
                        }
                }

                private void readXRecordEntries(CadXRecordTemplate template)
                {
                        this._reader.ReadNext();

                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.GroupCodeValue)
                                {
                                        case GroupCodeValueType.Point3D:
                                                var code = this._reader.Code;
                                                var x = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();
                                                var y = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();
                                                var z = this._reader.ValueAsDouble;
                                                XYZ pt = new XYZ(x, y, z);
                                                template.CadObject.CreateEntry(code, pt);
                                                break;
                                        case GroupCodeValueType.Handle:
                                        case GroupCodeValueType.ObjectId:
                                        case GroupCodeValueType.ExtendedDataHandle:
                                                template.AddHandleReference(this._reader.Code, this._reader.ValueAsHandle);
                                                break;
                                        default:
                                                template.CadObject.CreateEntry(this._reader.Code, this._reader.Value);
                                                break;
                                }

                                this._reader.ReadNext();
                        }
                }

                private bool readBookColor(CadTemplate template, DxfMap map)
                {
                        CadNonGraphicalObjectTemplate tmp = template as CadNonGraphicalObjectTemplate;
                        BookColor color = tmp.CadObject as BookColor;

                        switch (this._reader.Code)
                        {
                                case 430:
                                        color.Name = this._reader.ValueAsString;
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.DbColor]);
                        }
                }

                private bool readDimensionAssociation(CadTemplate template, DxfMap map)
                {
                        CadDimensionAssociationTemplate tmp = template as CadDimensionAssociationTemplate;
                        DimensionAssociation dimassoc = tmp.CadObject;

                        switch (this._reader.Code)
                        {
                                case 1 when this._reader.ValueAsString.Equals(DimensionAssociation.OsnapPointRefClassName):
                                        if (dimassoc.AssociativityFlags.HasFlag(AssociativityFlags.FirstPointReference)
                                                && dimassoc.FirstPointRef == null)
                                        {
                                                dimassoc.FirstPointRef = new DimensionAssociation.OsnapPointRef();
                                                this.readOsnapPointRef(dimassoc.FirstPointRef);
                                                this.lockPointer = true;
                                                return true;
                                        }

                                        if (dimassoc.AssociativityFlags.HasFlag(AssociativityFlags.SecondPointReference)
                                                && dimassoc.SecondPointRef == null)
                                        {
                                                dimassoc.SecondPointRef = new DimensionAssociation.OsnapPointRef();
                                                this.readOsnapPointRef(dimassoc.SecondPointRef);
                                                this.lockPointer = true;
                                                return true;
                                        }

                                        if (dimassoc.AssociativityFlags.HasFlag(AssociativityFlags.ThirdPointReference)
                                                && dimassoc.ThirdPointRef == null)
                                        {
                                                dimassoc.ThirdPointRef = new DimensionAssociation.OsnapPointRef();
                                                this.readOsnapPointRef(dimassoc.ThirdPointRef);
                                                this.lockPointer = true;
                                                return true;
                                        }

                                        if (dimassoc.AssociativityFlags.HasFlag(AssociativityFlags.FourthPointReference)
                                                && dimassoc.FourthPointRef == null)
                                        {
                                                dimassoc.FourthPointRef = new DimensionAssociation.OsnapPointRef();
                                                this.readOsnapPointRef(dimassoc.FourthPointRef);
                                                this.lockPointer = true;
                                                return true;
                                        }

                                        return true;
                                case 330 when template.OwnerHandle.HasValue:
                                        tmp.DimensionHandle = this._reader.ValueAsHandle;
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                        }
                }

                private CadDimensionAssociationTemplate.OsnapPointRefTemplate readOsnapPointRef(DimensionAssociation.OsnapPointRef osnapPoint)
                {
                        var template = new CadDimensionAssociationTemplate.OsnapPointRefTemplate(osnapPoint);

                        this._reader.ReadNext();

                        bool end = false;
                        while (!end)
                        {
                                switch (this._reader.Code)
                                {
                                        case 10:
                                                osnapPoint.OsnapPoint = new XYZ(
                                                        this._reader.ValueAsDouble,
                                                        osnapPoint.OsnapPoint.Y,
                                                        osnapPoint.OsnapPoint.Z
                                                        );
                                                break;
                                        case 20:
                                                osnapPoint.OsnapPoint = new XYZ(
                                                        osnapPoint.OsnapPoint.X,
                                                        this._reader.ValueAsDouble,
                                                        osnapPoint.OsnapPoint.Z
                                                        );
                                                break;
                                        case 30:
                                                osnapPoint.OsnapPoint = new XYZ(
                                                osnapPoint.OsnapPoint.X,
                                                osnapPoint.OsnapPoint.Y,
                                                this._reader.ValueAsDouble
                                                );
                                                break;
                                        case 40:
                                                osnapPoint.GeometryParameter = this._reader.ValueAsDouble;
                                                break;
                                        case 72:
                                                osnapPoint.ObjectOsnapType = (ObjectOsnapType)this._reader.ValueAsShort;
                                                break;
                                        case 73:
                                                osnapPoint.SubentType = (SubentType)this._reader.ValueAsShort;
                                                break;
                                        case 74:
                                                osnapPoint.IntersectionSubType = (SubentType)this._reader.ValueAsShort;
                                                break;
                                        case 75:
                                                osnapPoint.HasLastPointRef = this._reader.ValueAsBool;
                                                break;
                                        case 91:
                                                osnapPoint.GsMarker = this._reader.ValueAsInt;
                                                break;
                                        case 92:
                                                osnapPoint.IntersectionGsMarker = this._reader.ValueAsInt;
                                                break;
                                        case 331:
                                                template.ObjectHandle = this._reader.ValueAsHandle;
                                                break;
                                        case 302:
                                        case 332:
                                                //What are these?
                                                break;
                                        default:
                                                end = true;
                                                continue;
                                }

                                this._reader.ReadNext();
                        }

                        return template;
                }

                private bool readDictionary(CadTemplate template, DxfMap map)
                {
                        CadDictionaryTemplate tmp = template as CadDictionaryTemplate;
                        CadDictionary cadDictionary = tmp.CadObject;

                        switch (this._reader.Code)
                        {
                                case 280:
                                        cadDictionary.HardOwnerFlag = this._reader.ValueAsBool;
                                        return true;
                                case 281:
                                        cadDictionary.ClonningFlags = (DictionaryCloningFlags)this._reader.Value;
                                        return true;
                                case 3:
                                        tmp.Entries.Add(this._reader.ValueAsString, null);
                                        return true;
                                case 350: // Soft-owner ID/handle to entry object 
                                case 360: // Hard-owner ID/handle to entry object
                                        tmp.Entries[tmp.Entries.LastOrDefault().Key] = this._reader.ValueAsHandle;
                                        return true;
                                default:
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Dictionary]);
                        }
                }

                private bool readDictionaryWithDefault(CadTemplate template, DxfMap map)
                {
                        CadDictionaryWithDefaultTemplate tmp = template as CadDictionaryWithDefaultTemplate;

                        switch (this._reader.Code)
                        {
                                case 340:
                                        tmp.DefaultEntryHandle = this._reader.ValueAsHandle;
                                        return true;
                                default:
                                        if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.DictionaryWithDefault]))
                                        {
                                                return this.readDictionary(template, map);
                                        }
                                        return true;
                        }
                }

                private CadTemplate readSortentsTable()
                {
                        SortEntitiesTable sortTable = new SortEntitiesTable();
                        CadSortensTableTemplate template = new CadSortensTableTemplate(sortTable);

                        //Jump the 0 marker
                        this._reader.ReadNext();

                        this.readCommonObjectData(template);

                        System.Diagnostics.Debug.Assert(DxfSubclassMarker.SortentsTable == this._reader.ValueAsString);

                        //Jump the 100 marker
                        this._reader.ReadNext();

                        (ulong?, ulong?) pair = (null, null);

                        while (this._reader.DxfCode != DxfCode.Start)
                        {
                                switch (this._reader.Code)
                                {
                                        case 5:
                                                pair.Item1 = this._reader.ValueAsHandle;
                                                break;
                                        case 330:
                                                template.BlockOwnerHandle = this._reader.ValueAsHandle;
                                                break;
                                        case 331:
                                                pair.Item2 = this._reader.ValueAsHandle;
                                                break;
                                        default:
                                                this._builder.Notify($"Group Code not handled {this._reader.GroupCodeValue} for {typeof(SortEntitiesTable)}, code : {this._reader.Code} | value : {this._reader.ValueAsString}");
                                                break;
                                }

                                if (pair.Item1.HasValue && pair.Item2.HasValue)
                                {
                                        template.Values.Add((pair.Item1.Value, pair.Item2.Value));
                                        pair = (null, null);
                                }

                                this._reader.ReadNext();
                        }

                        return template;
                }
        }
}

DomCR / ACadSharp / 22711149797

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