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src/Microsoft.Restier.Providers.EntityFramework/Properties/Resources.Designer.cs
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src/Microsoft.Restier.Providers.EntityFramework/Spatial/GeographyConverter.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,150 @@ | ||
| // Copyright (c) Microsoft Corporation. All rights reserved. | ||
| // Licensed under the MIT License. See License.txt in the project root for license information. | ||
|
|
||
| using System; | ||
| using System.Data.Entity.Spatial; | ||
| using System.Globalization; | ||
| using System.Text; | ||
| using Microsoft.Restier.Providers.EntityFramework.Properties; | ||
| using Microsoft.Spatial; | ||
|
|
||
| namespace Microsoft.Restier.Providers.EntityFramework.Spatial | ||
| { | ||
| /// <summary> | ||
| /// The class defined conversion between GeographyPoint and DbGeography, | ||
| /// and between GeographyLineString and DbGeography. | ||
| /// </summary> | ||
| public static class GeographyConverter | ||
| { | ||
| private static readonly CultureInfo DefaultCulture = CultureInfo.GetCultureInfo("En-Us"); | ||
| private const string GeographyTypeNamePoint = "Point"; | ||
| private const string GeographyTypeNameLineString = "LineString"; | ||
|
|
||
| public static GeographyPoint ToGeographyPoint(this DbGeography geography) | ||
| { | ||
| if (geography == null) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| if (geography.SpatialTypeName != GeographyTypeNamePoint) | ||
| { | ||
| throw new InvalidOperationException(string.Format( | ||
| CultureInfo.InvariantCulture, | ||
| Resources.InvalidPointGeographyType, | ||
| geography.SpatialTypeName)); | ||
| } | ||
|
|
||
| double lat = geography.Latitude ?? 0; | ||
| double lon = geography.Longitude ?? 0; | ||
| double? alt = geography.Elevation; | ||
| double? m = geography.Measure; | ||
| return GeographyPoint.Create(lat, lon, alt, m); | ||
| } | ||
|
|
||
| public static DbGeography ToDbGeography(this GeographyPoint point) | ||
| { | ||
| if (point == null) | ||
| { | ||
| return null; | ||
| } | ||
|
|
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| string text = "POINT(" + point.Latitude.ToString(DefaultCulture) + " " + | ||
| point.Longitude.ToString(DefaultCulture); | ||
|
|
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| if (point.Z.HasValue) | ||
| { | ||
| text += " " + point.Z.Value; | ||
| } | ||
|
|
||
| if (point.M.HasValue) | ||
| { | ||
| text += " " + point.M.Value; | ||
| } | ||
|
|
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| text += ")"; | ||
|
|
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| return DbGeography.FromText(text); | ||
| } | ||
|
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||
| public static GeographyLineString ToGeographyLineString(this DbGeography geography) | ||
| { | ||
| if (geography == null) | ||
| { | ||
| return null; | ||
| } | ||
|
|
||
| if (geography.SpatialTypeName != GeographyTypeNameLineString) | ||
| { | ||
| throw new InvalidOperationException(string.Format( | ||
| CultureInfo.InvariantCulture, | ||
| Resources.InvalidLineStringGeographyType, | ||
| geography.SpatialTypeName)); | ||
| } | ||
|
|
||
| SpatialBuilder builder = SpatialBuilder.Create(); | ||
| GeographyPipeline pipleLine = builder.GeographyPipeline; | ||
| pipleLine.SetCoordinateSystem(CoordinateSystem.DefaultGeography); | ||
| pipleLine.BeginGeography(SpatialType.LineString); | ||
|
|
||
| int numPoints = geography.PointCount ?? 0; | ||
| if (numPoints > 0) | ||
| { | ||
| DbGeography point = geography.PointAt(1); | ||
| pipleLine.BeginFigure(new GeographyPosition(point.Latitude ?? 0, point.Latitude ?? 0, point.Elevation, point.Measure)); | ||
|
|
||
| for (int n = 2; n <= numPoints; n++) | ||
| { | ||
| point = geography.PointAt(n); | ||
| pipleLine.LineTo(new GeographyPosition(point.Latitude ?? 0, point.Latitude ?? 0, point.Elevation, point.Measure)); | ||
| } | ||
|
|
||
| pipleLine.EndFigure(); | ||
| } | ||
|
|
||
| pipleLine.EndGeography(); | ||
| GeographyLineString lineString = (GeographyLineString)builder.ConstructedGeography; | ||
| return lineString; | ||
| } | ||
|
|
||
| public static DbGeography ToDbGeography(this GeographyLineString lineString) | ||
| { | ||
| if (lineString == null) | ||
| { | ||
| return null; | ||
| } | ||
|
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||
| StringBuilder sb = new StringBuilder("LINESTRING("); | ||
| int n = 0; | ||
| foreach (var pt in lineString.Points) | ||
| { | ||
| double lat = pt.Latitude; | ||
| double lon = pt.Longitude; | ||
| double? alt = pt.Z; | ||
| double? m = pt.M; | ||
|
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| string pointStr = lat.ToString(DefaultCulture) + " " + lon.ToString(DefaultCulture); | ||
|
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| if (alt != null) | ||
| { | ||
| pointStr += " " + alt.Value; | ||
| } | ||
|
|
||
| if (m != null) | ||
| { | ||
| pointStr += " " + m.Value; | ||
| } | ||
|
|
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| sb.Append(pointStr); | ||
| n++; | ||
| if (n != lineString.Points.Count) | ||
| { | ||
| sb.Append(","); | ||
| } | ||
| } | ||
| sb.Append(")"); | ||
|
|
||
| return DbGeography.FromText(sb.ToString()); | ||
| } | ||
| } | ||
| } |
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