30610751535

Committed 31 Jul 2026 06:48AM UTC coverage: 75.759% (-0.05%) from 75.805%

Build # 30610751535

Build Type

Pull #1164

github

Committed by

web-flow

Commit Message

Merge 022ba76e5 into 219e5fc4a

Pull Request Pull Request #1164: Add DimensionArc entity with DWG and DXF read/write support

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9189 of 13117 branches covered (70.05%)

Branch coverage included in aggregate %.

68 of 112 new or added lines in 6 files covered. (60.71%)

6 existing lines in 1 file now uncovered.

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80.42

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

﻿using ACadSharp.Entities;
using ACadSharp.IO.Templates;
using ACadSharp.Objects;
using ACadSharp.Tables;
using ACadSharp.XData;
using CSMath;
using CSUtilities.Extensions;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using static ACadSharp.IO.Templates.CadMLeaderAnnotContextTemplate;
using static ACadSharp.IO.Templates.CadTableEntityTemplate;

namespace ACadSharp.IO.DXF.DxfStreamReader;

internal abstract class DxfSectionReaderBase
{
        public delegate bool ReadEntityDelegate<T>(CadEntityTemplate template, DxfMap map, string subclass = null) where T : Entity;

        protected readonly IDxfStreamReader _reader;
        protected readonly DxfDocumentBuilder _builder;

        //Avoid to move the reader to the next line
        protected bool lockPointer = false;
        protected string currentSubclass = null;

        public DxfSectionReaderBase(IDxfStreamReader reader, DxfDocumentBuilder builder)
        {
                this._reader = reader;
                this._builder = builder;
        }

        public abstract void Read();

        protected void readCommonObjectData(out string name, out ulong handle, out ulong? ownerHandle, out ulong? xdictHandle, out HashSet<ulong> reactors)
        {
                name = null;
                handle = 0;
                ownerHandle = null;
                xdictHandle = null;
                reactors = new HashSet<ulong>();

                if (this._reader.DxfCode == DxfCode.Start
                                || this._reader.DxfCode == DxfCode.Subclass)
                        this._reader.ReadNext();

                //Loop until the common data end
                while (this._reader.DxfCode != DxfCode.Start
                                && this._reader.DxfCode != DxfCode.Subclass)
                {
                        switch (this._reader.Code)
                        {
                                //Table name
                                case 2:
                                        name = this._reader.ValueAsString;
                                        break;
                                //Handle
                                case 5:
                                case 105:
                                        handle = this._reader.ValueAsHandle;
                                        break;
                                //Start of application - defined group
                                case 102:
                                        this.readDefinedGroups(out xdictHandle, out reactors);
                                        break;
                                //Soft - pointer ID / handle to owner BLOCK_RECORD object
                                case 330:
                                        ownerHandle = this._reader.ValueAsHandle;
                                        break;
                                case 71:
                                //Number of entries for dimension style table
                                case 340:
                                //Dimension table has the handles of the styles at the begining
                                default:
                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} at line {this._reader.Position}.");
                                        break;
                        }

                        this._reader.ReadNext();
                }
        }

        [Obsolete("Only needed for SortEntitiesTable but it should be removed")]
        protected void readCommonObjectData(CadTemplate template)
        {
                while (this._reader.DxfCode != DxfCode.Subclass)
                {
                        switch (this._reader.Code)
                        {
                                //object name
                                case 0:
                                        Debug.Assert(template.CadObject.ObjectName == this._reader.ValueAsString);
                                        break;
                                //Handle
                                case 5:
                                        template.CadObject.Handle = this._reader.ValueAsHandle;
                                        break;
                                //Start of application - defined group
                                case 102:
                                        this.readDefinedGroups(template);
                                        break;
                                //Soft - pointer ID / handle to owner BLOCK_RECORD object
                                case 330:
                                        template.OwnerHandle = this._reader.ValueAsHandle;
                                        break;
                                default:
                                        this._builder.Notify($"Unhandled dxf code {this._reader.Code} at line {this._reader.Position}.", NotificationType.None);
                                        break;
                        }

                        this._reader.ReadNext();
                }
        }

        protected void readCommonCodes(CadTemplate template, out bool isExtendedData, DxfMap map = null)
        {
                isExtendedData = false;

                switch (this._reader.Code)
                {
                        //Handle
                        case 5:
                                template.CadObject.Handle = this._reader.ValueAsHandle;
                                break;
                        //Check with mapper
                        case 100:
                                this.currentSubclass = this._reader.ValueAsString;
                                if (map != null && !map.SubClasses.ContainsKey(this._reader.ValueAsString))
                                {
                                        this._builder.Notify($"[{template.CadObject.ObjectName}] Unidentified subclass {this._reader.ValueAsString}", NotificationType.Warning);
                                }
                                break;
                        //Start of application - defined group
                        case 102:
                                this.readDefinedGroups(template);
                                break;
                        //Soft - pointer ID / handle to owner BLOCK_RECORD object
                        case 330:
                                template.OwnerHandle = this._reader.ValueAsHandle;
                                break;
                        case 1001:
                                isExtendedData = true;
                                this.readExtendedData(template.EDataTemplateByAppName);
                                break;
                        default:
                                this._builder.Notify($"[{this.currentSubclass}] Unhandled dxf code {this._reader.Code} with value {this._reader.ValueAsString}", NotificationType.None);
                                break;
                }
        }

        protected CadEntityTemplate readEntity()
        {
                this.currentSubclass = string.Empty;
                switch (this._reader.ValueAsString)
                {
                        case DxfFileToken.EntityAttribute:
                                return this.readEntityCodes<AttributeEntity>(new CadAttributeTemplate(new AttributeEntity()), this.readAttributeDefinition);
                        case DxfFileToken.EntityAttributeDefinition:
                                return this.readEntityCodes<AttributeDefinition>(new CadAttributeTemplate(new AttributeDefinition()), this.readAttributeDefinition);
                        case DxfFileToken.EntityArc:
                                return this.readEntityCodes<Arc>(new CadEntityTemplate<Arc>(), this.readArc);
                        case DxfFileToken.EntityBody:
                                return this.readEntityCodes<CadBody>(new CadModelerGeometryTemplate<CadBody>(), this.readModelerGeometry);
                        case DxfFileToken.EntityCircle:
                                return this.readEntityCodes<Circle>(new CadEntityTemplate<Circle>(), this.readCircle);
                        case DxfFileToken.EntityDimension:
                        case DxfFileToken.EntityArcDimension:
                                var dimTemplate = this.readEntityCodes<Dimension>(new CadDimensionTemplate(), this.readDimension);
                                if (dimTemplate.CadObject is CadDimensionTemplate.DimensionPlaceholder)
                                {
                                        this._builder.Notify($"[{DxfFileToken.EntityDimension}] No subtype found, object discarded.", NotificationType.Warning);
                                        return null;
                                }
                                return dimTemplate;
                        case DxfFileToken.Entity3DFace:
                                return this.readEntityCodes<Face3D>(new CadEntityTemplate<Face3D>(), this.readEntitySubclassMap);
                        case DxfFileToken.EntityEllipse:
                                return this.readEntityCodes<Ellipse>(new CadEntityTemplate<Ellipse>(), this.readEntitySubclassMap);
                        case DxfFileToken.EntityLeader:
                                return this.readEntityCodes<Leader>(new CadLeaderTemplate(), this.readLeader);
                        case DxfFileToken.EntityLine:
                                return this.readEntityCodes<Line>(new CadEntityTemplate<Line>(), this.readEntitySubclassMap);
                        case DxfFileToken.EntityLwPolyline:
                                return this.readEntityCodes<LwPolyline>(new CadEntityTemplate<LwPolyline>(), this.readLwPolyline);
                        case DxfFileToken.EntityMesh:
                                return this.readEntityCodes<Mesh>(new CadMeshTemplate(), this.readMesh);
                        case DxfFileToken.EntityHatch:
                                return this.readEntityCodes<Hatch>(new CadHatchTemplate(), this.readHatch);
                        case DxfFileToken.EntityInsert:
                                return this.readEntityCodes<Insert>(new CadInsertTemplate(), this.readInsert);
                        case DxfFileToken.EntityMText:
                                return this.readEntityCodes<MText>(new CadTextEntityTemplate(new MText()), this.readTextEntity);
                        case DxfFileToken.EntityMLine:
                                return this.readEntityCodes<MLine>(new CadMLineTemplate(), this.readMLine);
                        case DxfFileToken.EntityMultiLeader:
                                return this.readEntityCodes<MultiLeader>(new CadMLeaderTemplate(), this.readMLeader);
                        case DxfFileToken.EntityPdfUnderlay:
                                return this.readEntityCodes<PdfUnderlay>(new CadUnderlayTemplate<PdfUnderlayDefinition>(new PdfUnderlay()), this.readUnderlayEntity<PdfUnderlayDefinition>);
                        case DxfFileToken.EntityPoint:
                                return this.readEntityCodes<Point>(new CadEntityTemplate<Point>(), this.readEntitySubclassMap);
                        case DxfFileToken.EntityPolyline:
                                return this.readPolyline();
                        case DxfFileToken.EntityOle2Frame:
                                return this.readEntityCodes<Ole2Frame>(new CadOle2FrameTemplate(), this.readOle2Frame);
                        case DxfFileToken.EntityRay:
                                return this.readEntityCodes<Ray>(new CadEntityTemplate<Ray>(), this.readEntitySubclassMap);
                        case DxfFileToken.EndSequence:
                                return this.readEntityCodes<Seqend>(new CadEntityTemplate<Seqend>(), this.readEntitySubclassMap);
                        case DxfFileToken.EntityTrace:
                        case DxfFileToken.EntitySolid:
                                return this.readEntityCodes<Solid>(new CadEntityTemplate<Solid>(), this.readModelerGeometry);
                        case DxfFileToken.EntityTable:
                                return this.readEntityCodes<TableEntity>(new CadTableEntityTemplate(), this.readTableEntity);
                        case DxfFileToken.EntityText:
                                return this.readEntityCodes<TextEntity>(new CadTextEntityTemplate(new TextEntity()), this.readTextEntity);
                        case DxfFileToken.EntityTolerance:
                                return this.readEntityCodes<Tolerance>(new CadToleranceTemplate(new Tolerance()), this.readTolerance);
                        case DxfFileToken.EntityVertex:
                                return this.readEntityCodes<Entity>(new CadVertexTemplate(), this.readVertex);
                        case DxfFileToken.EntityViewport:
                                return this.readEntityCodes<Viewport>(new CadViewportTemplate(), this.readViewport);
                        case DxfFileToken.EntityShape:
                                return this.readEntityCodes<Shape>(new CadShapeTemplate(new Shape()), this.readShape);
                        case DxfFileToken.EntitySpline:
                                return this.readEntityCodes<Spline>(new CadSplineTemplate(), this.readSpline);
                        case DxfFileToken.Entity3DSolid:
                                return this.readEntityCodes<Solid3D>(new CadSolid3DTemplate(), this.readSolid3d);
                        case DxfFileToken.EntityRegion:
                                return this.readEntityCodes<Region>(new CadModelerGeometryTemplate<Region>(), this.readModelerGeometry);
                        case DxfFileToken.EntityImage:
                                return this.readEntityCodes<RasterImage>(new CadWipeoutBaseTemplate(new RasterImage()), this.readWipeoutBase);
                        case DxfFileToken.EntityWipeout:
                                return this.readEntityCodes<Wipeout>(new CadWipeoutBaseTemplate(new Wipeout()), this.readWipeoutBase);
                        case DxfFileToken.EntityXline:
                                return this.readEntityCodes<XLine>(new CadEntityTemplate<XLine>(), this.readEntitySubclassMap);
                        default:
                                DxfMap map = DxfMap.Create<Entity>();
                                CadUnknownEntityTemplate unknownEntityTemplate = null;
                                if (this._builder.DocumentToBuild.Classes.TryGetByName(this._reader.ValueAsString, out Classes.DxfClass dxfClass))
                                {
                                        this._builder.Notify($"Entity not supported read as an UnknownEntity: {this._reader.ValueAsString}", NotificationType.NotImplemented);
                                        unknownEntityTemplate = new CadUnknownEntityTemplate(new UnknownEntity(dxfClass));
                                }
                                else
                                {
                                        this._builder.Notify($"Entity not supported: {this._reader.ValueAsString}", NotificationType.NotImplemented);
                                }

                                this._reader.ReadNext();

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

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

                                return unknownEntityTemplate;
                }
        }

        protected CadEntityTemplate readEntityCodes<T>(CadEntityTemplate template, ReadEntityDelegate<T> readEntity)
                where T : Entity
        {
                this._reader.ReadNext();

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

                while (this._reader.DxfCode != DxfCode.Start)
                {
                        if (!readEntity(template, map))
                        {
                                this.readCommonEntityCodes(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;
        }

        protected void readCommonEntityCodes(CadEntityTemplate template, out bool isExtendedData, DxfMap map = null)
        {
                isExtendedData = false;
                switch (this._reader.Code)
                {
                        case 6:
                                template.LineTypeName = this._reader.ValueAsString;
                                break;
                        case 8:
                                template.LayerName = this._reader.ValueAsString;
                                break;
                        //Absent or zero indicates entity is in model space. 1 indicates entity is in paper space (optional).
                        case 67:
                                break;
                        //Number of bytes Proxy entity graphics data
                        case 92:
                        case 160:
                        //Proxy entity graphics data
                        case 310:
                                break;
                        case 347:
                                template.MaterialHandle = this._reader.ValueAsHandle;
                                break;
                        case 430:
                                template.BookColorName = this._reader.ValueAsString;
                                break;
                        default:
                                if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Entity]))
                                {
                                        this.readCommonCodes(template, out isExtendedData, map);
                                }
                                break;
                }
        }

        [Obsolete("use lockpointer instead")]
        protected bool checkObjectEnd(CadTemplate template, DxfMap map, Func<CadTemplate, DxfMap, bool> func)
        {
                if (this._reader.DxfCode == DxfCode.Start)
                {
                        return true;
                }
                else
                {
                        return func.Invoke(template, map);
                }
        }

        protected bool checkEntityEnd(CadEntityTemplate template, DxfMap map, string subclass, Func<CadEntityTemplate, DxfMap, string, bool> func)
        {
                if (this._reader.DxfCode == DxfCode.Start)
                {
                        return true;
                }
                else
                {
                        return func.Invoke(template, map, subclass);
                }
        }

        private bool readCircle(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                Circle circle = template.CadObject as Circle;

                switch (this._reader.Code)
                {
                        case 40:
                                double radius = this._reader.ValueAsDouble;
                                if (radius <= 0)
                                {
                                        circle.Radius = MathHelper.Epsilon;
                                }
                                else
                                {
                                        circle.Radius = radius;
                                }
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Circle]);
                }
        }

        private bool readArc(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                switch (this._reader.Code)
                {
                        default:
                                if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Arc]))
                                {
                                        return this.readCircle(template, map, DxfSubclassMarker.Circle);
                                }
                                return true;
                }
        }

        private bool readAttributeDefinition(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                DxfClassMap emap = map.SubClasses[template.CadObject.SubclassMarker];
                CadAttributeTemplate tmp = template as CadAttributeTemplate;

                switch (this._reader.Code)
                {
                        case 44:
                        case 46:
                                return true;
                        case 101:
                                var att = tmp.CadObject as AttributeBase;
                                att.MText = new MText();
                                CadTextEntityTemplate mtextTemplate = new CadTextEntityTemplate(att.MText);
                                tmp.MTextTemplate = mtextTemplate;
                                this.readEntityCodes<MText>(mtextTemplate, this.readTextEntity);
                                return true;
                        default:
                                if (!this.tryAssignCurrentValue(template.CadObject, emap))
                                {
                                        return this.readTextEntity(template, map, DxfSubclassMarker.Text);
                                }
                                return true;
                }
        }

        private bool readTableEntity(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                string mapName = string.IsNullOrEmpty(subclass) ? template.CadObject.SubclassMarker : subclass;
                CadTableEntityTemplate tmp = template as CadTableEntityTemplate;
                TableEntity table = tmp.CadObject as TableEntity;

                switch (this._reader.Code)
                {
                        case 1:
                                TableEntity.CellContent content;
                                if (tmp.CurrentCell.Content == null)
                                {
                                        content = new TableEntity.CellContent();
                                        content.CadValue.ValueType = CadValueType.String;
                                        tmp.CurrentCell.Contents.Add(content);
                                }
                                else
                                {
                                        content = tmp.CurrentCell.Content;
                                }

                                if (content.CadValue.Value == null)
                                {
                                        content.CadValue.SetValue(this._reader.ValueAsString, CadValueType.String);
                                }
                                else
                                {
                                        string str = content.CadValue.Value as string;
                                        str += this._reader.ValueAsString;
                                        content.CadValue.SetValue(str, CadValueType.String);
                                }
                                return true;
                        case 2:
                                if (this.currentSubclass.Equals(DxfSubclassMarker.TableEntity, StringComparison.OrdinalIgnoreCase))
                                {
                                        content = tmp.CurrentCell.Content;
                                        if (content.CadValue.Value == null)
                                        {
                                                content.CadValue.SetValue(this._reader.ValueAsString, CadValueType.String);
                                        }
                                        else
                                        {
                                                string str = content.CadValue.Value as string;
                                                str += this._reader.ValueAsString;
                                                content.CadValue.SetValue(str, CadValueType.String);
                                        }
                                }
                                else
                                {
                                        tmp.BlockName = this._reader.ValueAsString;
                                }
                                return true;
                        //Border overrides:
                        case 177:
                                //Cell override flag value (before AutoCAD 2007)
                                return true;
                        case 279:
                                //Lineweight for the top border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.TopBorder.LineWeight = (LineWeightType)this._reader.ValueAsShort;
                                return true;
                        case 275:
                                //Lineweight for the right border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.RightBorder.LineWeight = (LineWeightType)this._reader.ValueAsShort;
                                return true;
                        case 276:
                                //Lineweight for the bottom border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.BottomBorder.LineWeight = (LineWeightType)this._reader.ValueAsShort;
                                return true;
                        case 278:
                                //Lineweight for the left border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.LeftBorder.LineWeight = (LineWeightType)this._reader.ValueAsShort;
                                return true;
                        case 69:
                                //True color value for the top border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.TopBorder.Color = new Color(this._reader.ValueAsShort);
                                return true;
                        case 65:
                                //True color value for the right border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.RightBorder.Color = new Color(this._reader.ValueAsShort);
                                return true;
                        case 66:
                                //True color value for the bottom border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.BottomBorder.Color = new Color(this._reader.ValueAsShort);
                                return true;
                        case 68:
                                //True color value for the left border of the cell; override applied at the cell level
                                tmp.CurrentCell.StyleOverride.LeftBorder.Color = new Color(this._reader.ValueAsShort);
                                return true;
                        case 40:
                                tmp.HorizontalMargin = this._reader.ValueAsDouble;
                                return true;
                        case 63:
                                tmp.CurrentCell.StyleOverride.BackgroundColor = new Color(this._reader.ValueAsShort);
                                return true;
                        case 64:
                                tmp.CurrentCell.StyleOverride.ContentColor = new Color(this._reader.ValueAsShort);
                                return true;
                        case 140:
                                if (tmp.CurrentCellTemplate != null)
                                {
                                        tmp.CurrentCellTemplate.FormatTextHeight = this._reader.ValueAsDouble;
                                }
                                return true;
                        case 283:
                                tmp.CurrentCell.StyleOverride.IsFillColorOn = this._reader.ValueAsBool;
                                return true;
                        case 342:
                                tmp.StyleHandle = this._reader.ValueAsHandle;
                                return true;
                        case 343:
                                tmp.BlockOwnerHandle = this._reader.ValueAsHandle;
                                return true;
                        case 141:
                                var row = new TableEntity.Row();
                                row.Height = this._reader.ValueAsDouble;
                                table.Rows.Add(row);
                                return true;
                        case 142:
                                var col = new TableEntity.Column();
                                col.Width = this._reader.ValueAsDouble;
                                table.Columns.Add(col);
                                return true;
                        case 144:
                                tmp.CurrentCellTemplate.FormatTextHeight = this._reader.ValueAsDouble;
                                return true;
                        case 145:
                                tmp.CurrentCell.Rotation = this._reader.ValueAsDouble;
                                return true;
                        case 170:
                                //Has data flag
                                return true;
                        case 171:
                                tmp.CreateCell((TableEntity.CellType)this._reader.ValueAsInt);
                                return true;
                        case 172:
                                tmp.CurrentCell.EdgeFlags = this._reader.ValueAsShort;
                                return true;
                        case 173:
                                tmp.CurrentCell.MergedValue = this._reader.ValueAsShort;
                                return true;
                        case 174:
                                tmp.CurrentCell.AutoFit = this._reader.ValueAsBool;
                                return true;
                        case 175:
                                tmp.CurrentCell.BorderWidth = this._reader.ValueAsInt;
                                return true;
                        case 176:
                                tmp.CurrentCell.BorderHeight = this._reader.ValueAsInt;
                                return true;
                        case 178:
                                tmp.CurrentCell.VirtualEdgeFlag = this._reader.ValueAsShort;
                                return true;
                        case 179:
                                //Unknown value
                                return true;
                        case 301:
                                content = new TableEntity.CellContent();
                                var contentTemplate = new CadTableCellContentTemplate(content);
                                tmp.CurrentCell.Contents.Add(content);
                                var valTemplate = readCadValue(content.CadValue);
                                contentTemplate.CadValueTemplate = valTemplate;
                                return true;
                        case 340:
                                tmp.CurrentCellTemplate.ValueHandle = this._reader.ValueAsHandle;
                                return true;
                        default:
                                if (!this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Insert]))
                                {
                                        return this.readEntitySubclassMap(template, map, DxfSubclassMarker.TableEntity);
                                }
                                return true;
                }
        }

        protected CadValueTemplate readCadValue(CadValue value)
        {
                this._reader.ReadNext();

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

                while (this._reader.Code != 304)
                {
                        switch (this._reader.Code)
                        {
                                case 1:
                                        value.SetValue(this._reader.ValueAsString);
                                        break;
                                case 2:
                                        value.SetValue((value.Value as string) + this._reader.ValueAsString);
                                        break;
                                case 11:
                                        XYZ xyz = new XYZ();
                                        xyz.X = this._reader.ValueAsDouble;
                                        value.SetValue(xyz);
                                        break;
                                case 21:
                                        {
                                                IVector v = value.Value as IVector;
                                                v[1] = this._reader.ValueAsDouble;
                                                value.SetValue(v);
                                        }
                                        break;
                                case 31:
                                        {
                                                IVector v = value.Value as IVector;
                                                v = v.Convert<XYZ>();
                                                v[2] = this._reader.ValueAsDouble;
                                                value.SetValue(v);
                                        }
                                        break;
                                case 90:
                                        value.ValueType = (CadValueType)this._reader.ValueAsInt;
                                        break;
                                case 91:
                                        value.SetValue(this._reader.ValueAsInt);
                                        break;
                                case 93:
                                        value.Flags = this._reader.ValueAsInt;
                                        break;
                                case 140:
                                        value.SetValue(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 readTextEntity(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                string mapName = string.IsNullOrEmpty(subclass) ? template.CadObject.SubclassMarker : subclass;
                CadTextEntityTemplate tmp = template as CadTextEntityTemplate;

                switch (this._reader.Code)
                {
                        case 1 or 3 when tmp.CadObject is MText mtext:
                                mtext.Value += this._reader.ValueAsString;
                                return true;
                        case 50 when tmp.CadObject is MText mtext://Read only for MText
                                double angle = this._reader.ValueAsAngle;
                                mtext.AlignmentPoint = new XYZ(System.Math.Cos(angle), System.Math.Sin(angle), 0.0);
                                return true;
                        case 7:
                                tmp.StyleName = this._reader.ValueAsString;
                                return true;
                        case 101 when tmp.CadObject is MText mtext:
                                this.readColumnData(mtext);
                                this.lockPointer = true;
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[mapName]);
                }
        }

        private void readColumnData(MText mtext)
        {
                this._reader.ReadNext();
                while (this._reader.DxfCode != DxfCode.Start)
                {
                        switch (this._reader.Code)
                        {
                                //Element count?
                                case 70:
                                        break;
                                case 71:
                                        mtext.ColumnData.ColumnType = (ColumnType)this._reader.ValueAsShort;
                                        break;
                                case 72:
                                        mtext.ColumnData.ColumnCount = this._reader.ValueAsInt;
                                        break;
                                //X - axis dir 3BD 10
                                case 10:
                                case 20:
                                case 30:
                                //Insertion point 3BD 11
                                case 11:
                                case 21:
                                case 31:
                                //Rect width BD 40
                                case 40:
                                //Rect height BD 41
                                case 41:
                                //Extents width BD 42
                                case 42:
                                //Extents height BD 43
                                case 43:
                                        break;
                                case 44:
                                        mtext.ColumnData.Width = this._reader.ValueAsDouble;
                                        break;
                                case 45:
                                        mtext.ColumnData.Gutter = this._reader.ValueAsDouble;
                                        break;
                                case 46:
                                        mtext.ColumnData.Heights.Add(this._reader.ValueAsDouble);
                                        break;
                                case 73:
                                        mtext.ColumnData.AutoHeight = this._reader.ValueAsBool;
                                        break;
                                case 74:
                                        mtext.ColumnData.FlowReversed = this._reader.ValueAsBool;
                                        break;
                                default:
                                        this._builder.Notify($"[MText.ColumnData] unkown dxf code {this._reader.Code}.", NotificationType.None);
                                        break;
                        }

                        this._reader.ReadNext();
                }
        }

        private bool readTolerance(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadToleranceTemplate tmp = template as CadToleranceTemplate;

                switch (this._reader.Code)
                {
                        case 3:
                                tmp.DimensionStyleName = this._reader.ValueAsString;
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[template.CadObject.SubclassMarker]);
                }
        }

        private bool readDimension(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadDimensionTemplate tmp = template as CadDimensionTemplate;

                switch (this._reader.Code)
                {
                        case 2:
                                tmp.BlockName = this._reader.ValueAsString;
                                return true;
                        case 3:
                                tmp.StyleName = this._reader.ValueAsString;
                                return true;
                        case 50:
                                if (tmp.CadObject is not DimensionLinear dim)
                                {
                                        dim = new DimensionLinear();
                                        tmp.SetDimensionObject(dim);
                                }
                                dim.Rotation = this._reader.ValueAsAngle;
                                map.SubClasses.TryAdd(DxfSubclassMarker.LinearDimension, DxfClassMap.Create<DimensionLinear>());
                                return true;
                        case 70 when tmp.CadObject is DimensionArc arc && this.currentSubclass == DxfSubclassMarker.ArcDimension:
                                arc.IsPartial = this._reader.ValueAsBool;
                                return true;
                        case 70:
                                //Flags do not have set
                                tmp.SetDimensionFlags((DimensionType)this._reader.ValueAsShort);

                                if (tmp.CadObject is CadDimensionTemplate.DimensionPlaceholder placeholder && this._builder.Version < ACadVersion.AC1012)
                                {
                                        switch (placeholder.Flags)
                                        {
                                                case DimensionType.Linear:
                                                        tmp.SetDimensionObject(new DimensionLinear());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.AlignedDimension, DxfClassMap.Create<DimensionAligned>());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.LinearDimension, DxfClassMap.Create<DimensionLinear>());
                                                        break;
                                                case DimensionType.Aligned:
                                                        tmp.SetDimensionObject(new DimensionAligned());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.AlignedDimension, DxfClassMap.Create<DimensionAligned>());
                                                        break;
                                                case DimensionType.Angular:
                                                        tmp.SetDimensionObject(new DimensionAngular2Line());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.Angular2LineDimension, DxfClassMap.Create<DimensionAngular2Line>());
                                                        break;
                                                case DimensionType.Diameter:
                                                        tmp.SetDimensionObject(new DimensionDiameter());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.DiametricDimension, DxfClassMap.Create<DimensionDiameter>());
                                                        break;
                                                case DimensionType.Radius:
                                                        tmp.SetDimensionObject(new DimensionRadius());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.RadialDimension, DxfClassMap.Create<DimensionRadius>());
                                                        break;
                                                case DimensionType.Angular3Point:
                                                        tmp.SetDimensionObject(new DimensionAngular3Pt());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.Angular3PointDimension, DxfClassMap.Create<DimensionAngular3Pt>());
                                                        break;
                                                case DimensionType.Ordinate:
                                                case DimensionType.OrdinateTypeX:
                                                case DimensionType.Ordinate | DimensionType.OrdinateTypeX:
                                                        tmp.SetDimensionObject(new DimensionOrdinate());
                                                        map.SubClasses.TryAdd(DxfSubclassMarker.OrdinateDimension, DxfClassMap.Create<DimensionOrdinate>());
                                                        break;
                                                case DimensionType.BlockReference:
                                                case DimensionType.TextUserDefinedLocation:
                                                default:
                                                        break;
                                        }
                                }
                                return true;
                        //Measurement - read only
                        case 42:
                                return true;
                        //Undocumented codes
                        case 73:
                        case 74:
                        case 75:
                        case 90:
                        case 361:
                                return true;
                        case 100:
                                this.currentSubclass = this._reader.ValueAsString;
                                switch (this._reader.ValueAsString)
                                {
                                        case DxfSubclassMarker.Dimension:
                                                return true;
                                        case DxfSubclassMarker.AlignedDimension:
                                                tmp.SetDimensionObject(new DimensionAligned());
                                                map.SubClasses.TryAdd(this._reader.ValueAsString, DxfClassMap.Create<DimensionAligned>());
                                                return true;
                                        case DxfSubclassMarker.DiametricDimension:
                                                tmp.SetDimensionObject(new DimensionDiameter());
                                                map.SubClasses.TryAdd(this._reader.ValueAsString, DxfClassMap.Create<DimensionDiameter>());
                                                return true;
                                        case DxfSubclassMarker.Angular2LineDimension:
                                                tmp.SetDimensionObject(new DimensionAngular2Line());
                                                map.SubClasses.TryAdd(this._reader.ValueAsString, DxfClassMap.Create<DimensionAngular2Line>());
                                                return true;
                                        case DxfSubclassMarker.Angular3PointDimension:
                                                tmp.SetDimensionObject(new DimensionAngular3Pt());
                                                map.SubClasses.TryAdd(this._reader.ValueAsString, DxfClassMap.Create<DimensionAngular3Pt>());
                                                return true;
                                        case DxfSubclassMarker.ArcDimension:
                                                tmp.SetDimensionObject(new DimensionArc());
                                                map.SubClasses.TryAdd(this._reader.ValueAsString, DxfClassMap.Create<DimensionArc>());
                                                return true;
                                        case DxfSubclassMarker.RadialDimension:
                                                tmp.SetDimensionObject(new DimensionRadius());
                                                map.SubClasses.TryAdd(this._reader.ValueAsString, DxfClassMap.Create<DimensionRadius>());
                                                return true;
                                        case DxfSubclassMarker.OrdinateDimension:
                                                tmp.SetDimensionObject(new DimensionOrdinate());
                                                map.SubClasses.TryAdd(this._reader.ValueAsString, DxfClassMap.Create<DimensionOrdinate>());
                                                return true;
                                        case DxfSubclassMarker.LinearDimension:
                                                tmp.SetDimensionObject(new DimensionLinear());
                                                map.SubClasses.TryAdd(DxfSubclassMarker.LinearDimension, DxfClassMap.Create<DimensionLinear>());
                                                return true;
                                        default:
                                                return false;
                                }
                        default:
                                if (string.IsNullOrEmpty(this.currentSubclass))
                                {
                                        //Pre R13 files do not have the subclass markers
                                        this.currentSubclass = tmp.CadObject.SubclassMarker;
                                }

                                return this.tryAssignCurrentValue(template.CadObject, map);
                }
        }

        protected bool readHatch(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadHatchTemplate tmp = template as CadHatchTemplate;
                Hatch hatch = tmp.CadObject;

                XY seedPoint = new XY();

                switch (this._reader.Code)
                {
                        case 2:
                                hatch.Pattern.Name = this._reader.ValueAsString;
                                return true;
                        case 10:
                                seedPoint.X = this._reader.ValueAsDouble;
                                hatch.SeedPoints.Add(seedPoint);
                                return true;
                        case 20:
                                seedPoint = hatch.SeedPoints.LastOrDefault();
                                seedPoint.Y = this._reader.ValueAsDouble;
                                hatch.SeedPoints[hatch.SeedPoints.Count - 1] = seedPoint;
                                return true;
                        case 30:
                                hatch.Elevation = this._reader.ValueAsDouble;
                                return true;
                        case 53:
                                hatch.PatternAngle = this._reader.ValueAsAngle;
                                return true;
                        //TODO: Check hatch undocumented codes
                        case 90:
                                return true;
                        //Information about the hatch pattern
                        case 75:
                                return true;
                        //Number of pattern definition lines
                        case 78:
                                this.readPattern(hatch.Pattern, this._reader.ValueAsInt);
                                this.lockPointer = true;
                                return true;
                        //Number of boundary paths (loops)
                        case 91:
                                this.readLoops(tmp, this._reader.ValueAsInt);
                                this.lockPointer = true;
                                return true;
                        //Number of seed points
                        case 98:
                                return true;
                        case 450:
                                hatch.GradientColor.Enabled = this._reader.ValueAsBool;
                                return true;
                        case 451:
                                hatch.GradientColor.Reserved = this._reader.ValueAsInt;
                                return true;
                        case 452:
                                hatch.GradientColor.IsSingleColorGradient = this._reader.ValueAsBool;
                                return true;
                        case 453:
                                //Number of colors
                                return true;
                        case 460:
                                hatch.GradientColor.Angle = this._reader.ValueAsDouble;
                                return true;
                        case 461:
                                hatch.GradientColor.Shift = this._reader.ValueAsDouble;
                                return true;
                        case 462:
                                hatch.GradientColor.ColorTint = this._reader.ValueAsDouble;
                                return true;
                        case 463:
                                GradientColor gradient = new GradientColor();
                                gradient.Value = this._reader.ValueAsDouble;
                                hatch.GradientColor.Colors.Add(gradient);
                                return true;
                        case 63:
                                GradientColor colorByIndex = hatch.GradientColor.Colors.LastOrDefault();
                                if (colorByIndex != null)
                                {
                                        colorByIndex.Color = new Color((short)this._reader.ValueAsUShort);
                                }
                                return true;
                        case 421:
                                GradientColor colorByRgb = hatch.GradientColor.Colors.LastOrDefault();
                                if (colorByRgb != null)
                                {
                                        //TODO: Hatch assign color by true color
                                        //TODO: Is always duplicated by 63, is it needed??
                                        //colorByRgb.Color = new Color(this._reader.LastValueAsShort);
                                }
                                return true;
                        case 470:
                                hatch.GradientColor.Name = this._reader.ValueAsString;
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[template.CadObject.SubclassMarker]);
                }
        }

        private bool readInsert(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadInsertTemplate tmp = template as CadInsertTemplate;

                switch (this._reader.Code)
                {
                        case 2:
                                tmp.BlockName = this._reader.ValueAsString;
                                return true;
                        case 100:
                                //AcDbEntity
                                //AcDbBlockReference
                                //AcDbMInsertBlock
                                return true;
                        case 66:
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Insert]);
                }
        }

        private CadEntityTemplate readPolyline()
        {
                if (this._builder.Version == ACadVersion.Unknown
                        || this._builder.Version == ACadVersion.AC1009)
                {
                        return this.readLegacyPolyline();
                }

                CadPolyLineTemplate template = null;
                template = new CadPolyLineTemplate();
                this.readEntityCodes<Entity>(template, this.readPolyline);

                if (template.CadObject is CadPolyLineTemplate.PolyLinePlaceholder)
                {
                        this._builder.Notify($"[{DxfFileToken.EntityPolyline}] Subclass not found, entity discarded", NotificationType.Warning);
                        return null;
                }

                while (this._reader.Code == 0 && this._reader.ValueAsString == DxfFileToken.EntityVertex)
                {
                        var vertexTemplate = this.readEntityCodes<Entity>(new CadVertexTemplate(), this.readVertex);

                        if (vertexTemplate.OwnerHandle == null)
                        {
                                vertexTemplate.OwnerHandle = template.CadObject.Handle;
                        }

                        template.OwnedObjectsHandlers.Add(vertexTemplate.CadObject.Handle);
                        _builder.AddTemplate(vertexTemplate);
                }

                while (this._reader.Code == 0 && this._reader.ValueAsString == DxfFileToken.EndSequence)
                {
                        var seqend = new Seqend();
                        var seqendTemplate = new CadEntityTemplate<Seqend>(seqend);
                        this.readEntityCodes<Seqend>(seqendTemplate, this.readEntitySubclassMap);

                        if (seqendTemplate.OwnerHandle == null)
                        {
                                seqendTemplate.OwnerHandle = template.CadObject.Handle;
                        }

                        template.OwnedObjectsHandlers.Add(seqendTemplate.CadObject.Handle);
                        _builder.AddTemplate(seqendTemplate);
                }

                return template;
        }

        private CadEntityTemplate readLegacyPolyline()
        {
                var polyline = new Polyline2D();
                CadPolyLineTemplate template = new CadPolyLineTemplate(polyline);
                this.readEntityCodes<Polyline2D>(template, this.readPolyline);

                while (this._reader.Code == 0 && this._reader.ValueAsString == DxfFileToken.EntityVertex)
                {
                        Vertex2D v = new Vertex2D();
                        CadVertexTemplate vertexTemplate = new CadVertexTemplate(v);
                        this.readEntityCodes<Vertex2D>(vertexTemplate, this.readVertex);

                        if (vertexTemplate.Vertex.Handle == 0)
                        {
                                polyline.Vertices.Add(v);
                        }
                        else
                        {
                                template.OwnedObjectsHandlers.Add(vertexTemplate.Vertex.Handle);
                                this._builder.AddTemplate(vertexTemplate);
                        }
                }

                while (this._reader.Code == 0 && this._reader.ValueAsString == DxfFileToken.EndSequence)
                {
                        var seqend = new Seqend();
                        var seqendTemplate = new CadEntityTemplate<Seqend>(seqend);
                        this.readEntityCodes<Seqend>(seqendTemplate, this.readEntitySubclassMap);

                        polyline.Vertices.Seqend = seqend;
                }

                return template;
        }

        private bool readPolyline(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadPolyLineTemplate tmp = template as CadPolyLineTemplate;

                switch (this._reader.Code)
                {
                        //DXF: always 0
                        //APP: a “dummy” point; the X and Y values are always 0, and the Z value is the polyline's elevation (in OCS when 2D, WCS when 3D)
                        case 10:
                        case 20:
                        //Obsolete; formerly an “entities follow flag” (optional; ignore if present)
                        case 66:
                                return true;
                        case 100:
                                switch (this._reader.ValueAsString)
                                {
                                        case DxfSubclassMarker.Polyline:
                                                tmp.SetPolyLineObject(new Polyline2D());
                                                map.SubClasses.Add(DxfSubclassMarker.Polyline, DxfClassMap.Create<Polyline2D>());
                                                return true;
                                        case DxfSubclassMarker.Polyline3d:
                                                tmp.SetPolyLineObject(new Polyline3D());
                                                map.SubClasses.Add(DxfSubclassMarker.Polyline3d, DxfClassMap.Create<Polyline3D>());
                                                return true;
                                        case DxfSubclassMarker.PolyfaceMesh:
                                                tmp.SetPolyLineObject(new PolyfaceMesh());
                                                map.SubClasses.Add(DxfSubclassMarker.PolyfaceMesh, DxfClassMap.Create<PolyfaceMesh>());
                                                return true;
                                        case DxfSubclassMarker.PolygonMesh:
                                                tmp.SetPolyLineObject(new PolygonMesh());
                                                map.SubClasses.Add(DxfSubclassMarker.PolygonMesh, DxfClassMap.Create<PolygonMesh>());
                                                return true;
                                        default:
                                                return false;
                                }
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readLeader(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadLeaderTemplate tmp = template as CadLeaderTemplate;

                switch (this._reader.Code)
                {
                        case 3:
                                tmp.DIMSTYLEName = this._reader.ValueAsString;
                                return true;
                        case 10:
                                tmp.CadObject.Vertices.Add(new XYZ(this._reader.ValueAsDouble, 0, 0));
                                return true;
                        case 20:
                                XYZ y = tmp.CadObject.Vertices[tmp.CadObject.Vertices.Count - 1];
                                y.Y = this._reader.ValueAsDouble;
                                tmp.CadObject.Vertices[tmp.CadObject.Vertices.Count - 1] = y;
                                return true;
                        case 30:
                                XYZ z = tmp.CadObject.Vertices[tmp.CadObject.Vertices.Count - 1];
                                z.Z = this._reader.ValueAsDouble;
                                tmp.CadObject.Vertices[tmp.CadObject.Vertices.Count - 1] = z;
                                return true;
                        case 340:
                                tmp.AnnotationHandle = this._reader.ValueAsHandle;
                                return true;
                        //Hook line flag - read only
                        case 75:
                        //Vertices count
                        case 76:
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readLwPolyline(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadEntityTemplate<LwPolyline> tmp = template as CadEntityTemplate<LwPolyline>;

                LwPolyline.Vertex last = tmp.CadObject.Vertices.LastOrDefault();

                switch (this._reader.Code)
                {
                        case 10:
                                tmp.CadObject.Vertices.Add(new LwPolyline.Vertex(new XY(this._reader.ValueAsDouble, 0)));
                                return true;
                        case 20:
                                if (last is not null)
                                {
                                        last.Location = new XY(last.Location.X, this._reader.ValueAsDouble);
                                }
                                return true;
                        case 40:
                                if (last is not null)
                                {
                                        last.StartWidth = this._reader.ValueAsDouble;
                                }
                                return true;
                        case 41:
                                if (last is not null)
                                {
                                        last.EndWidth = this._reader.ValueAsDouble;
                                }
                                return true;
                        case 42:
                                if (last is not null)
                                {
                                        last.Bulge = this._reader.ValueAsDouble;
                                }
                                return true;
                        case 50:
                                if (last is not null)
                                {
                                        last.CurveTangent = this._reader.ValueAsDouble;
                                }
                                return true;
                        //Obsolete; formerly an “entities follow flag” (optional; ignore if present)
                        case 66:
                        //Vertex count
                        case 90:
                                return true;
                        case 91:
                                if (last is not null)
                                {
                                        last.Id = this._reader.ValueAsInt;
                                }
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readMesh(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadMeshTemplate tmp = template as CadMeshTemplate;

                switch (this._reader.Code)
                {
                        case 100:
                                if (this._reader.ValueAsString.Equals(DxfSubclassMarker.Mesh, StringComparison.OrdinalIgnoreCase))
                                {
                                        tmp.SubclassMarker = true;
                                }
                                return true;
                        //Count of sub-entity which property has been overridden
                        case 90:
                                //TODO: process further entities
                                return true;
                        case 92:
                                if (!tmp.SubclassMarker)
                                {
                                        return false;
                                }

                                int nvertices = this._reader.ValueAsInt;
                                for (int i = 0; i < nvertices; i++)
                                {
                                        this._reader.ReadNext();
                                        double x = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        double y = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        double z = this._reader.ValueAsDouble;
                                        tmp.CadObject.Vertices.Add(new XYZ(x, y, z));
                                }
                                return true;
                        case 93:
                                int size = this._reader.ValueAsInt;
                                this._reader.ReadNext();

                                int indexes = 0;
                                for (int i = 0; i < size; i += indexes + 1)
                                {
                                        indexes = this._reader.ValueAsInt;
                                        this._reader.ReadNext();

                                        int[] face = new int[indexes];
                                        for (int j = 0; j < indexes; j++)
                                        {
                                                face[j] = this._reader.ValueAsInt;

                                                if ((i + j + 2) < size)
                                                {
                                                        this._reader.ReadNext();
                                                }
                                        }

                                        tmp.CadObject.Faces.Add(face);
                                }

                                return true;
                        case 94:
                                int numEdges = this._reader.ValueAsInt;
                                this._reader.ReadNext();
                                for (int i = 0; i < numEdges; i++)
                                {
                                        Mesh.Edge edge = new Mesh.Edge();

                                        edge.Start = this._reader.ValueAsInt;
                                        this._reader.ReadNext();
                                        edge.End = this._reader.ValueAsInt;

                                        if (i < numEdges - 1)
                                        {
                                                this._reader.ReadNext();
                                        }

                                        tmp.CadObject.Edges.Add(edge);
                                }

                                return true;
                        case 95:
                                this._reader.ReadNext();
                                for (int i = 0; i < tmp.CadObject.Edges.Count; i++)
                                {
                                        Mesh.Edge edge = tmp.CadObject.Edges[i];
                                        edge.Crease = this._reader.ValueAsDouble;

                                        tmp.CadObject.Edges[i] = edge;

                                        if (i < tmp.CadObject.Edges.Count - 1)
                                        {
                                                this._reader.ReadNext();
                                        }
                                }

                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readMLine(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadMLineTemplate tmp = template as CadMLineTemplate;

                switch (this._reader.Code)
                {
                        // String of up to 32 characters. The name of the style used for this mline. An entry for this style must exist in the MLINESTYLE dictionary.
                        // Do not modify this field without also updating the associated entry in the MLINESTYLE dictionary
                        case 2:
                                tmp.MLineStyleName = this._reader.ValueAsString;
                                return true;
                        case 72:
                                tmp.NVertex = this._reader.ValueAsInt;
                                return true;
                        case 73:
                                tmp.NElements = this._reader.ValueAsInt;
                                return true;
                        case 340:
                                tmp.MLineStyleHandle = this._reader.ValueAsHandle;
                                return true;
                        default:
                                if (!tmp.TryReadVertex(this._reader.Code, this._reader.Value))
                                {
                                        return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                                }
                                return true;
                }
        }

        private bool readMLeader(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadMLeaderTemplate tmp = template as CadMLeaderTemplate;

                switch (this._reader.Code)
                {
                        case 270:
                                //f270 Version
                                return true;
                        case 300:
                                this.readMultiLeaderObjectContextData(tmp.CadMLeaderAnnotContextTemplate);
                                return true;
                        case 340:
                                tmp.LeaderStyleHandle = this._reader.ValueAsHandle;
                                return true;
                        case 341:
                                tmp.LeaderLineTypeHandle = this._reader.ValueAsHandle;
                                return true;
                        case 343:
                                tmp.MTextStyleHandle = this._reader.ValueAsHandle;
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private void readMultiLeaderObjectContextData(CadMLeaderAnnotContextTemplate template)
        {
                this._reader.ReadNext();

                var map = DxfClassMap.Create<MultiLeaderObjectContextData>();
                var contextData = template.CadObject as MultiLeaderObjectContextData;

                bool end = false;
                while (this._reader.DxfCode != DxfCode.Start)
                {
                        switch (this._reader.Code)
                        {
                                case 301 when this._reader.ValueAsString.Equals("}"):
                                        end = true;
                                        break;
                                case 302 when this._reader.ValueAsString.Equals("LEADER{"):
                                        contextData.LeaderRoots.Add(this.readMultiLeaderLeader(template));
                                        break;
                                case 340:
                                        template.TextStyleHandle = this._reader.ValueAsHandle;
                                        break;
                                default:
                                        if (!this.tryAssignCurrentValue(contextData, map))
                                        {
                                                this._builder.Notify($"[AcDbMLeaderObjectContextData] Unhandled dxf code {this._reader.Code} with value {this._reader.ValueAsString}", NotificationType.None);
                                        }
                                        break;
                        }

                        if (end)
                        {
                                break;
                        }

                        this._reader.ReadNext();
                }
        }

        private MultiLeaderObjectContextData.LeaderRoot readMultiLeaderLeader(CadMLeaderAnnotContextTemplate template)
        {
                MultiLeaderObjectContextData.LeaderRoot root = new();
                var map = DxfClassMap.Create(root.GetType(), nameof(MultiLeaderObjectContextData.LeaderRoot));

                this._reader.ReadNext();

                bool end = false;
                while (this._reader.DxfCode != DxfCode.Start)
                {
                        switch (this._reader.Code)
                        {
                                case 303 when this._reader.ValueAsString.Equals("}"):
                                        end = true;
                                        break;
                                case 304 when this._reader.ValueAsString.Equals("LEADER_LINE{"):
                                        var lineTemplate = new LeaderLineTemplate();
                                        template.LeaderLineTemplates.Add(lineTemplate);
                                        root.Lines.Add(this.readMultiLeaderLine(lineTemplate));
                                        break;
                                default:
                                        if (!this.tryAssignCurrentValue(root, map))
                                        {
                                                this._builder.Notify($"[LeaderRoot] Unhandled dxf code {this._reader.Code} with value {this._reader.ValueAsString}", NotificationType.None);
                                        }
                                        break;
                        }

                        if (end)
                        {
                                break;
                        }

                        this._reader.ReadNext();
                }

                return root;
        }

        private MultiLeaderObjectContextData.LeaderLine readMultiLeaderLine(LeaderLineTemplate template)
        {
                MultiLeaderObjectContextData.LeaderLine line = template.LeaderLine;
                var map = DxfClassMap.Create(line.GetType(), nameof(MultiLeaderObjectContextData.LeaderLine));

                this._reader.ReadNext();

                bool end = false;
                while (this._reader.DxfCode != DxfCode.Start)
                {
                        switch (this._reader.Code)
                        {
                                case 10:
                                        XYZ pt = new XYZ(this._reader.ValueAsDouble, 0, 0);
                                        line.Points.Add(pt);
                                        break;
                                case 20:
                                        pt = line.Points[line.Points.Count - 1];
                                        pt.Y = this._reader.ValueAsDouble;
                                        line.Points[line.Points.Count - 1] = pt;
                                        break;
                                case 30:
                                        pt = line.Points[line.Points.Count - 1];
                                        pt.Z = this._reader.ValueAsDouble;
                                        line.Points[line.Points.Count - 1] = pt;
                                        break;
                                case 305 when this._reader.ValueAsString.Equals("}"):
                                        end = true;
                                        break;
                                default:
                                        if (!this.tryAssignCurrentValue(line, map))
                                        {
                                                this._builder.Notify($"[LeaderLine] Unhandled dxf code {this._reader.Code} with value {this._reader.ValueAsString}", NotificationType.None);
                                        }
                                        break;
                        }

                        if (end)
                        {
                                break;
                        }

                        this._reader.ReadNext();
                }

                return line;
        }

        private bool readShape(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadShapeTemplate tmp = template as CadShapeTemplate;

                switch (this._reader.Code)
                {
                        case 2:
                                tmp.ShapeFileName = this._reader.ValueAsString;
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readWipeoutBase(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadWipeoutBaseTemplate tmp = template as CadWipeoutBaseTemplate;
                CadWipeoutBase wipeout = tmp.CadObject as CadWipeoutBase;

                switch (this._reader.Code)
                {
                        case 91:
                                var nvertices = this._reader.ValueAsInt;
                                for (int i = 0; i < nvertices; i++)
                                {
                                        this._reader.ReadNext();
                                        var x = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        var y = this._reader.ValueAsDouble;

                                        wipeout.ClipBoundaryVertices.Add(new XY(x, y));
                                }

                                this._reader.ReadNext();

                                return this.checkEntityEnd(template, map, subclass, this.readWipeoutBase);
                        case 340:
                                tmp.ImgDefHandle = this._reader.ValueAsHandle;
                                return true;
                        case 360:
                                tmp.ImgReactorHandle = this._reader.ValueAsHandle;
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readOle2Frame(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadOle2FrameTemplate tmp = template as CadOle2FrameTemplate;

                switch (this._reader.Code)
                {
                        //End of data
                        case 1:
                        //Length of binary data
                        case 90:
                        //Undocumented
                        case 73:
                                return true;
                        case 310:
                                tmp.Chunks.Add(this._reader.ValueAsBinaryChunk);
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readModelerGeometry(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadSolid3DTemplate tmp = template as CadSolid3DTemplate;
                string mapName = string.IsNullOrEmpty(subclass) ? template.CadObject.SubclassMarker : subclass;
                var geometry = template.CadObject as ModelerGeometry;

                switch (this._reader.Code)
                {
                        case 1:
                                //New SAT line: decoded into the template accumulator, raw into
                                //ProprietaryData to preserve the previous behavior.
                                (template as IAcisDataTemplate)?.AppendAcisLine(this._reader.ValueAsString);
                                geometry.ProprietaryData.AppendLine(this._reader.ValueAsString);
                                return true;
                        case 3:
                                //Continuation of the previous SAT line.
                                (template as IAcisDataTemplate)?.AppendAcisContinuation(this._reader.ValueAsString);
                                geometry.ProprietaryData.AppendLine(this._reader.ValueAsString);
                                return true;
                        case 2:
                                geometry.Guid = new Guid(this._reader.ValueAsString);
                                return true;
                        case 290:
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[mapName]);
                }
        }

        private bool readSolid3d(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadSolid3DTemplate tmp = template as CadSolid3DTemplate;

                switch (this._reader.Code)
                {
                        case 350:
                                tmp.HistoryHandle = this._reader.ValueAsHandle;
                                return true;
                        default:
                                return this.readModelerGeometry(template, map, DxfSubclassMarker.ModelerGeometry);
                }
        }

        private bool readSpline(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadSplineTemplate tmp = template as CadSplineTemplate;

                XYZ controlPoint;
                XYZ fitPoint;

                switch (this._reader.Code)
                {
                        case 10:
                                controlPoint = new CSMath.XYZ(this._reader.ValueAsDouble, 0, 0);
                                tmp.CadObject.ControlPoints.Add(controlPoint);
                                return true;
                        case 20:
                                controlPoint = tmp.CadObject.ControlPoints.LastOrDefault();
                                controlPoint.Y = this._reader.ValueAsDouble;
                                tmp.CadObject.ControlPoints[tmp.CadObject.ControlPoints.Count - 1] = controlPoint;
                                return true;
                        case 30:
                                controlPoint = tmp.CadObject.ControlPoints.LastOrDefault();
                                controlPoint.Z = this._reader.ValueAsDouble;
                                tmp.CadObject.ControlPoints[tmp.CadObject.ControlPoints.Count - 1] = controlPoint;
                                return true;
                        case 11:
                                fitPoint = new CSMath.XYZ(this._reader.ValueAsDouble, 0, 0);
                                tmp.CadObject.FitPoints.Add(fitPoint);
                                return true;
                        case 21:
                                fitPoint = tmp.CadObject.FitPoints.LastOrDefault();
                                fitPoint.Y = this._reader.ValueAsDouble;
                                tmp.CadObject.FitPoints[tmp.CadObject.FitPoints.Count - 1] = fitPoint;
                                return true;
                        case 31:
                                fitPoint = tmp.CadObject.FitPoints.LastOrDefault();
                                fitPoint.Z = this._reader.ValueAsDouble;
                                tmp.CadObject.FitPoints[tmp.CadObject.FitPoints.Count - 1] = fitPoint;
                                return true;
                        case 40:
                                tmp.CadObject.Knots.Add(this._reader.ValueAsDouble);
                                return true;
                        case 41:
                                tmp.CadObject.Weights.Add(this._reader.ValueAsDouble);
                                return true;
                        case 72:
                        case 73:
                        case 74:
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readUnderlayEntity<T>(CadEntityTemplate template, DxfMap map, string subclass = null)
                where T : PdfUnderlayDefinition
        {
                CadUnderlayTemplate<T> tmp = template as CadUnderlayTemplate<T>;

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

        private bool readVertex(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadVertexTemplate tmp = template as CadVertexTemplate;

                switch (this._reader.Code)
                {
                        case 100:
                                switch (this._reader.ValueAsString)
                                {
                                        case DxfSubclassMarker.Vertex:
                                                return true;
                                        case DxfSubclassMarker.PolylineVertex:
                                                tmp.SetVertexObject(new Vertex2D());
                                                map.SubClasses.Add(DxfSubclassMarker.PolylineVertex, DxfClassMap.Create<Vertex2D>());
                                                return true;
                                        case DxfSubclassMarker.Polyline3dVertex:
                                                tmp.SetVertexObject(new Vertex3D());
                                                map.SubClasses.Add(DxfSubclassMarker.Polyline3dVertex, DxfClassMap.Create<Vertex3D>());
                                                return true;
                                        case DxfSubclassMarker.PolyfaceMeshVertex:
                                                tmp.SetVertexObject(new VertexFaceMesh());
                                                map.SubClasses.Add(DxfSubclassMarker.PolyfaceMeshVertex, DxfClassMap.Create<VertexFaceMesh>());
                                                return true;
                                        case DxfSubclassMarker.PolyfaceMeshFace:
                                                tmp.SetVertexObject(new VertexFaceRecord());
                                                map.SubClasses.Add(DxfSubclassMarker.PolyfaceMeshFace, DxfClassMap.Create<VertexFaceRecord>());
                                                return true;
                                        case DxfSubclassMarker.PolygonMeshVertex:
                                                tmp.SetVertexObject(new PolygonMeshVertex());
                                                map.SubClasses.Add(DxfSubclassMarker.PolygonMeshVertex, DxfClassMap.Create<PolygonMeshVertex>());
                                                return true;
                                        default:
                                                return false;
                                }
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[tmp.CadObject.SubclassMarker]);
                }
        }

        private bool readViewport(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                CadViewportTemplate tmp = template as CadViewportTemplate;

                switch (this._reader.Code)
                {
                        //Undocumented
                        case 67:
                        case 68:
                                return true;
                        case 69:
                                tmp.ViewportId = this._reader.ValueAsShort;
                                return true;
                        case 331:
                                tmp.FrozenLayerHandles.Add(this._reader.ValueAsHandle);
                                return true;
                        case 348:
                                tmp.VisualStyleHandle = this._reader.ValueAsHandle;
                                return true;
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[DxfSubclassMarker.Viewport]);
                }
        }

        private bool readEntitySubclassMap(CadEntityTemplate template, DxfMap map, string subclass = null)
        {
                string mapName = string.IsNullOrEmpty(subclass) ? template.CadObject.SubclassMarker : subclass;

                switch (this._reader.Code)
                {
                        default:
                                return this.tryAssignCurrentValue(template.CadObject, map.SubClasses[mapName]);
                }
        }

        protected void readExtendedData(Dictionary<string, List<ExtendedDataRecord>> edata)
        {
                List<ExtendedDataRecord> records = new();
                edata.Add(this._reader.ValueAsString, records);

                this._reader.ReadNext();

                while (this._reader.DxfCode >= DxfCode.ExtendedDataAsciiString)
                {
                        if (this._reader.DxfCode == DxfCode.ExtendedDataRegAppName)
                        {
                                this.readExtendedData(edata);
                                break;
                        }

                        ExtendedDataRecord record = null;
                        double x = 0;
                        double y = 0;
                        double z = 0;

                        switch (this._reader.DxfCode)
                        {
                                case DxfCode.ExtendedDataAsciiString:
                                case DxfCode.ExtendedDataRegAppName:
                                        record = new ExtendedDataString(this._reader.ValueAsString);
                                        break;
                                case DxfCode.ExtendedDataControlString:
                                        record = new ExtendedDataControlString(this._reader.ValueAsString == "}");
                                        break;
                                case DxfCode.ExtendedDataLayerName:
                                        if (this._builder.Layers.TryGetValue(this._reader.ValueAsString, out Layer layer))
                                        {
                                                record = new ExtendedDataLayer(layer.Handle);
                                        }
                                        else
                                        {
                                                this._builder.Notify($"[XData] Could not found the linked Layer {this._reader.ValueAsString}.", NotificationType.Warning);
                                        }
                                        break;
                                case DxfCode.ExtendedDataBinaryChunk:
                                        record = new ExtendedDataBinaryChunk(this._reader.ValueAsBinaryChunk);
                                        break;
                                case DxfCode.ExtendedDataHandle:
                                        record = new ExtendedDataHandle(this._reader.ValueAsHandle);
                                        break;
                                case DxfCode.ExtendedDataXCoordinate:
                                        x = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        y = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        z = this._reader.ValueAsDouble;

                                        record = new ExtendedDataCoordinate(
                                                new XYZ(
                                                        x,
                                                        y,
                                                        z)
                                                );
                                        break;
                                case DxfCode.ExtendedDataWorldXCoordinate:
                                        x = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        y = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        z = this._reader.ValueAsDouble;

                                        record = new ExtendedDataWorldCoordinate(
                                                new XYZ(
                                                        x,
                                                        y,
                                                        z)
                                                );
                                        break;
                                case DxfCode.ExtendedDataWorldXDisp:
                                        x = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        y = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        z = this._reader.ValueAsDouble;

                                        record = new ExtendedDataDisplacement(
                                                new XYZ(
                                                        x,
                                                        y,
                                                        z)
                                                );
                                        break;
                                case DxfCode.ExtendedDataWorldXDir:
                                        x = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        y = this._reader.ValueAsDouble;
                                        this._reader.ReadNext();
                                        z = this._reader.ValueAsDouble;

                                        record = new ExtendedDataDirection(
                                                new XYZ(
                                                        x,
                                                        y,
                                                        z)
                                                );
                                        break;
                                case DxfCode.ExtendedDataReal:
                                        record = new ExtendedDataReal(this._reader.ValueAsDouble);
                                        break;
                                case DxfCode.ExtendedDataDist:
                                        record = new ExtendedDataDistance(this._reader.ValueAsDouble);
                                        break;
                                case DxfCode.ExtendedDataScale:
                                        record = new ExtendedDataScale(this._reader.ValueAsDouble);
                                        break;
                                case DxfCode.ExtendedDataInteger16:
                                        record = new ExtendedDataInteger16(this._reader.ValueAsShort);
                                        break;
                                case DxfCode.ExtendedDataInteger32:
                                        record = new ExtendedDataInteger32((int)this._reader.ValueAsInt);
                                        break;
                                default:
                                        this._builder.Notify($"Unknown code for extended data: {this._reader.DxfCode}", NotificationType.Warning);
                                        break;
                        }

                        if (record != null)
                        {
                                records.Add(record);
                        }

                        this._reader.ReadNext();
                }
        }

        private void readPattern(HatchPattern pattern, int nlines)
        {
                //Jump 78 code
                this._reader.ReadNext();

                for (int i = 0; i < nlines; i++)
                {
                        HatchPattern.Line line = new HatchPattern.Line();
                        XY basePoint = new XY();
                        XY offset = new XY();

                        bool end = false;
                        HashSet<int> codes = new();

                        while (!end)
                        {
                                if (codes.Contains(this._reader.Code))
                                {
                                        break;
                                }
                                else
                                {
                                        codes.Add(this._reader.Code);
                                }

                                switch (this._reader.Code)
                                {
                                        case 53:
                                                line.Angle = this._reader.ValueAsAngle;
                                                break;
                                        case 43:
                                                basePoint.X = this._reader.ValueAsDouble;
                                                break;
                                        case 44:
                                                basePoint.Y = this._reader.ValueAsDouble;
                                                line.BasePoint = basePoint;
                                                break;
                                        case 45:
                                                offset.X = this._reader.ValueAsDouble;
                                                line.Offset = offset;
                                                break;
                                        case 46:
                                                offset.Y = this._reader.ValueAsDouble;
                                                line.Offset = offset;
                                                break;
                                        //Number of dash length items
                                        case 79:
                                                int ndash = this._reader.ValueAsInt;
                                                for (int j = 0; j < ndash; j++)
                                                {
                                                        this._reader.ReadNext();
                                                        line.DashLengths.Add(this._reader.ValueAsDouble);
                                                }
                                                break;
                                        case 49:
                                                line.DashLengths.Add(this._reader.ValueAsDouble);
                                                break;
                                        default:
                                                end = true;
                                                break;
                                }
                                this._reader.ReadNext();
                        }

                        pattern.Lines.Add(line);
                }
        }

        private void readLoops(CadHatchTemplate template, int count)
        {
                if (this._reader.Code == 91)
                        this._reader.ReadNext();

                for (int i = 0; i < count; i++)
                {
                        if (this._reader.Code != 92)
                        {
                                this._builder.Notify($"Boundary path should start with code 92 but was {this._reader.Code}");
                                break;
                        }

                        CadHatchTemplate.CadBoundaryPathTemplate path = this.readLoop();
                        if (path != null)
                                template.PathTemplates.Add(path);
                }
        }

        private CadHatchTemplate.CadBoundaryPathTemplate readLoop()
        {
                CadHatchTemplate.CadBoundaryPathTemplate template = new CadHatchTemplate.CadBoundaryPathTemplate();
                var flags = (BoundaryPathFlags)this._reader.ValueAsInt;
                template.Path.Flags = flags;

                if (flags.HasFlag(BoundaryPathFlags.Polyline))
                {
                        Hatch.BoundaryPath.Polyline pl = this.readPolylineBoundary();
                        template.Path.Edges.Add(pl);
                }
                else
                {
                        this._reader.ReadNext();

                        if (this._reader.Code != 93)
                        {
                                this._builder.Notify($"Edge Boundary path should start with code 93 but was {this._reader.Code}");
                                return null;
                        }

                        int edges = this._reader.ValueAsInt;
                        this._reader.ReadNext();

                        for (int i = 0; i < edges; i++)
                        {
                                var edge = this.readEdge();
                                if (edge != null)
                                        template.Path.Edges.Add(edge);
                        }
                }

                bool end = false;
                while (!end)
                {
                        switch (this._reader.Code)
                        {
                                //Number of source boundary objects
                                case 97:
                                        break;
                                case 330:
                                        template.Handles.Add(this._reader.ValueAsHandle);
                                        break;
                                default:
                                        end = true;
                                        continue;
                        }

                        this._reader.ReadNext();
                }

                return template;
        }

        private Hatch.BoundaryPath.Polyline readPolylineBoundary()
        {
                Hatch.BoundaryPath.Polyline boundary = new Hatch.BoundaryPath.Polyline();

                this._reader.ReadNext();

                if (this._reader.Code != 72)
                {
                        this._builder.Notify($"Polyline Boundary path should start with code 72 but was {this._reader.Code}");
                        return null;
                }

                bool end = false;
                bool hasBulge = false;
                while (!end)
                {
                        switch (this._reader.Code)
                        {
                                case 72:
                                        hasBulge = this._reader.ValueAsBool;
                                        break;
                                case 73:
                                        boundary.IsClosed = this._reader.ValueAsBool;
                                        break;
                                case 93:
                                        int nvertices = this._reader.ValueAsInt;
                                        this._reader.ReadNext();

                                        for (int i = 0; i < nvertices; i++)
                                        {
                                                double bulge = 0.0;

                                                //10
                                                double x = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();
                                                //20
                                                double y = this._reader.ValueAsDouble;
                                                this._reader.ReadNext();

                                                if (hasBulge)
                                                {
                                                        //42
                                                        bulge = this._reader.ValueAsDouble;
                                                        this._reader.ReadNext();
                                                }

                                                boundary.Vertices.Add(new XYZ(x, y, bulge));
                                        }
                                        continue;
                                default:
                                        end = true;
                                        continue;
                        }

                        this._reader.ReadNext();
                }

                return boundary;
        }

        private Hatch.BoundaryPath.Edge readEdge()
        {
                if (this._reader.Code != 72)
                {
                        this._builder.Notify($"Edge Boundary path should define the type with code 72 but was {this._reader.Code}");
                        return null;
                }

                Hatch.BoundaryPath.EdgeType type = (Hatch.BoundaryPath.EdgeType)this._reader.ValueAsInt;
                this._reader.ReadNext();

                switch (type)
                {
                        case Hatch.BoundaryPath.EdgeType.Line:
                                Hatch.BoundaryPath.Line line = new Hatch.BoundaryPath.Line();
                                while (true)
                                {
                                        switch (this._reader.Code)
                                        {
                                                case 10:
                                                        line.Start = new XY(this._reader.ValueAsDouble, line.Start.Y);
                                                        break;
                                                case 20:
                                                        line.Start = new XY(line.Start.X, this._reader.ValueAsDouble);
                                                        break;
                                                case 11:
                                                        line.End = new XY(this._reader.ValueAsDouble, line.End.Y);
                                                        break;
                                                case 21:
                                                        line.End = new XY(line.End.X, this._reader.ValueAsDouble);
                                                        break;
                                                default:
                                                        return line;
                                        }

                                        this._reader.ReadNext();
                                }
                        case Hatch.BoundaryPath.EdgeType.CircularArc:
                                Hatch.BoundaryPath.Arc arc = new Hatch.BoundaryPath.Arc();
                                while (true)
                                {
                                        switch (this._reader.Code)
                                        {
                                                case 10:
                                                        arc.Center = new XY(this._reader.ValueAsDouble, arc.Center.Y);
                                                        break;
                                                case 20:
                                                        arc.Center = new XY(arc.Center.X, this._reader.ValueAsDouble);
                                                        break;
                                                case 40:
                                                        arc.Radius = this._reader.ValueAsDouble;
                                                        break;
                                                case 50:
                                                        arc.StartAngle = MathHelper.DegToRad(this._reader.ValueAsDouble);
                                                        break;
                                                case 51:
                                                        arc.EndAngle = MathHelper.DegToRad(this._reader.ValueAsDouble);
                                                        break;
                                                case 73:
                                                        arc.CounterClockWise = this._reader.ValueAsBool;
                                                        break;
                                                default:
                                                        return arc;
                                        }

                                        this._reader.ReadNext();
                                }
                        case Hatch.BoundaryPath.EdgeType.EllipticArc:
                                Hatch.BoundaryPath.Ellipse ellipse = new Hatch.BoundaryPath.Ellipse();
                                while (true)
                                {
                                        switch (this._reader.Code)
                                        {
                                                case 10:
                                                        ellipse.Center = new XY(this._reader.ValueAsDouble, ellipse.Center.Y);
                                                        break;
                                                case 20:
                                                        ellipse.Center = new XY(ellipse.Center.X, this._reader.ValueAsDouble);
                                                        break;
                                                case 11:
                                                        ellipse.MajorAxisEndPoint = new XY(this._reader.ValueAsDouble, ellipse.MajorAxisEndPoint.Y);
                                                        break;
                                                case 21:
                                                        ellipse.MajorAxisEndPoint = new XY(ellipse.MajorAxisEndPoint.X, this._reader.ValueAsDouble);
                                                        break;
                                                case 40:
                                                        ellipse.RadiusRatio = this._reader.ValueAsDouble;
                                                        break;
                                                case 50:
                                                        ellipse.StartAngle = MathHelper.DegToRad(this._reader.ValueAsDouble);
                                                        break;
                                                case 51:
                                                        ellipse.EndAngle = MathHelper.DegToRad(this._reader.ValueAsDouble);
                                                        break;
                                                case 73:
                                                        ellipse.CounterClockWise = this._reader.ValueAsBool;
                                                        break;
                                                default:
                                                        return ellipse;
                                        }

                                        this._reader.ReadNext();
                                }
                        case Hatch.BoundaryPath.EdgeType.Spline:
                                Hatch.BoundaryPath.Spline spline = new Hatch.BoundaryPath.Spline();
                                int nKnots = 0;
                                int nCtrlPoints = 0;
                                int nFitPoints = 0;

                                XYZ controlPoint = new XYZ();
                                XY fitPoint = new XY();

                                while (true)
                                {
                                        switch (this._reader.Code)
                                        {
                                                case 10:
                                                        controlPoint = new XYZ(this._reader.ValueAsDouble, 0, 1);
                                                        break;
                                                case 20:
                                                        controlPoint = new XYZ(controlPoint.X, this._reader.ValueAsDouble, controlPoint.Z);
                                                        spline.ControlPoints.Add(controlPoint);
                                                        break;
                                                case 11:
                                                        fitPoint = new XY(this._reader.ValueAsDouble, 0);
                                                        break;
                                                case 21:
                                                        fitPoint = new XY(fitPoint.X, this._reader.ValueAsDouble);
                                                        spline.FitPoints.Add(fitPoint);
                                                        break;
                                                case 42:
                                                        var last = spline.ControlPoints[spline.ControlPoints.Count - 1];
                                                        spline.ControlPoints[spline.ControlPoints.Count - 1] = new XYZ(last.X, last.Y, this._reader.ValueAsDouble);
                                                        break;
                                                case 12:
                                                        spline.StartTangent = new XY(this._reader.ValueAsDouble, spline.StartTangent.Y);
                                                        break;
                                                case 22:
                                                        spline.StartTangent = new XY(spline.StartTangent.X, this._reader.ValueAsDouble);
                                                        break;
                                                case 13:
                                                        spline.EndTangent = new XY(this._reader.ValueAsDouble, spline.EndTangent.Y);
                                                        break;
                                                case 23:
                                                        spline.EndTangent = new XY(spline.EndTangent.X, this._reader.ValueAsDouble);
                                                        break;
                                                case 94:
                                                        spline.Degree = this._reader.ValueAsInt;
                                                        break;
                                                case 73:
                                                        spline.IsRational = this._reader.ValueAsBool;
                                                        break;
                                                case 74:
                                                        spline.IsPeriodic = this._reader.ValueAsBool;
                                                        break;
                                                case 95:
                                                        nKnots = this._reader.ValueAsInt;
                                                        break;
                                                case 96:
                                                        nCtrlPoints = this._reader.ValueAsInt;
                                                        break;
                                                case 97:
                                                        nFitPoints = this._reader.ValueAsInt;
                                                        break;
                                                case 40:
                                                        spline.Knots.Add(this._reader.ValueAsDouble);
                                                        break;
                                                default:
                                                        return spline;
                                        }

                                        this._reader.ReadNext();
                                }
                }

                return null;
        }

        private void readDefinedGroups(CadTemplate template)
        {
                this.readDefinedGroups(out ulong? xdict, out HashSet<ulong> reactorsHandles);

                if (xdict.HasValue)
                {
                        template.XDictHandle = xdict;
                }
                template.ReactorsHandles.UnionWith(reactorsHandles);
        }

        private void readDefinedGroups(out ulong? xdictHandle, out HashSet<ulong> reactors)
        {
                xdictHandle = null;
                reactors = new HashSet<ulong>();

                switch (this._reader.ValueAsString)
                {
                        case DxfFileToken.DictionaryToken:
                                this._reader.ReadNext();
                                xdictHandle = this._reader.ValueAsHandle;
                                this._reader.ReadNext();
                                Debug.Assert(this._reader.DxfCode == DxfCode.ControlString);
                                return;
                        case DxfFileToken.ReactorsToken:
                                reactors = this.readReactors();
                                break;
                        case DxfFileToken.BlkRefToken:
                        default:
                                do
                                {
                                        this._reader.ReadNext();
                                }
                                while (this._reader.DxfCode != DxfCode.ControlString);
                                return;
                }
        }

        private HashSet<ulong> readReactors()
        {
                HashSet<ulong> reactors = new();

                this._reader.ReadNext();

                while (this._reader.DxfCode != DxfCode.ControlString)
                {
                        reactors.Add(this._reader.ValueAsHandle);

                        this._reader.ReadNext();
                }

                return reactors;
        }

        protected bool tryAssignCurrentValue(object cadObject, DxfMap map)
        {
                if (string.IsNullOrEmpty(this.currentSubclass))
                {
                        return false;
                }

                if (map.SubClasses.TryGetValue(this.currentSubclass, out var subClass))
                {
                        return this.tryAssignCurrentValue(cadObject, subClass);
                }
                else
                {
                        return false;
                }
        }

        protected bool tryAssignCurrentValue(object cadObject, DxfClassMap map)
        {
                try
                {
                        //Use this method only if the value is not a link between objects
                        if (map.DxfProperties.TryGetValue(this._reader.Code, out DxfProperty dxfProperty))
                        {
                                if (dxfProperty.ReferenceType.HasFlag(DxfReferenceType.Count))
                                {
                                        return true;
                                }

                                if (dxfProperty.ReferenceType.HasFlag(DxfReferenceType.Handle)
                                        || dxfProperty.ReferenceType.HasFlag(DxfReferenceType.Name))
                                {
                                        return false;
                                }

                                object value = this._reader.Value;

                                if (dxfProperty.ReferenceType.HasFlag(DxfReferenceType.IsAngle))
                                {
                                        value = MathHelper.DegToRad((double)value);
                                }

                                dxfProperty.SetValue(this._reader.Code, cadObject, value);

                                return true;
                        }
                }
                catch (Exception ex)
                {
                        if (!this._builder.Configuration.Failsafe)
                        {
                                throw ex;
                        }
                        else
                        {
                                this._builder.Notify("An error occurred while assigning a property using mapper", NotificationType.Error, ex);
                        }
                }

                return false;
        }
}

DomCR / ACadSharp / 30610751535

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