Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

external/entityframework/src/EntityFramework/Spatial/SpatialHelpers.cs

@@ -0,0 +1,63 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
+
+namespace System.Data.Entity.Spatial
+{
+    using System.Data.Common;
+    using System.Data.Entity.Core.Metadata.Edm;
+    using System.Data.Entity.Utilities;
+    using System.Diagnostics;
+    using System.Threading;
+    using System.Threading.Tasks;
+
+    internal static class SpatialHelpers
+    {
+        internal static object GetSpatialValue(MetadataWorkspace workspace, DbDataReader reader, TypeUsage columnType, int columnOrdinal)
+        {
+            Debug.Assert(Helper.IsSpatialType(columnType));
+            var spatialReader = CreateSpatialDataReader(workspace, reader);
+            if (Helper.IsGeographicType((PrimitiveType)columnType.EdmType))
+            {
+                return spatialReader.GetGeography(columnOrdinal);
+            }
+            else
+            {
+                return spatialReader.GetGeometry(columnOrdinal);
+            }
+        }
+
+#if !NET40
+
+        internal static async Task<object> GetSpatialValueAsync(
+            MetadataWorkspace workspace, DbDataReader reader,
+            TypeUsage columnType, int columnOrdinal, CancellationToken cancellationToken)
+        {
+            Debug.Assert(Helper.IsSpatialType(columnType));
+            var spatialReader = CreateSpatialDataReader(workspace, reader);
+            if (Helper.IsGeographicType((PrimitiveType)columnType.EdmType))
+            {
+                return
+                    await spatialReader.GetGeographyAsync(columnOrdinal, cancellationToken).ConfigureAwait(continueOnCapturedContext: false);
+            }
+            else
+            {
+                return
+                    await spatialReader.GetGeometryAsync(columnOrdinal, cancellationToken).ConfigureAwait(continueOnCapturedContext: false);
+            }
+        }
+
+#endif
+
+        internal static DbSpatialDataReader CreateSpatialDataReader(MetadataWorkspace workspace, DbDataReader reader)
+        {
+            var storeItemCollection = (StoreItemCollection)workspace.GetItemCollection(DataSpace.SSpace);
+            var providerFactory = storeItemCollection.StoreProviderFactory;
+            Debug.Assert(providerFactory != null, "GetProviderSpatialServices requires provider factory to have been initialized");
+
+            var providerServices = providerFactory.GetProviderServices();
+            var result = providerServices.GetSpatialDataReader(reader, storeItemCollection.StoreProviderManifestToken);
+            Debug.Assert(result != null, "DbProviderServices did not throw ProviderIncompatibleException for null IDbSpatialDataReader");
+
+            return result;
+        }
+    }
+}