Adds support for retrieving collection of enum values from UpdateMethod property of UpdateRestrictions annotation

src/Microsoft.OpenApi.OData.Reader/Edm/RecordExpressionExtensions.cs

@@ -94,18 +94,30 @@ public static string GetString(this IEdmRecordExpression record, string property
         /// <param name="propertyName">The property name.</param>
         /// <returns>The Enum value or null.</returns>
         public static T? GetEnum<T>(this IEdmRecordExpression record, string propertyName)
-            where T : struct
+            where T : struct, Enum
         {
             Utils.CheckArgumentNull(record, nameof(record));
             Utils.CheckArgumentNull(propertyName, nameof(propertyName));
 
-            return (record.Properties?.FirstOrDefault(e => propertyName.Equals(e.Name, StringComparison.Ordinal)) is IEdmPropertyConstructor property &&
+            if (record.Properties?.FirstOrDefault(e => propertyName.Equals(e.Name, StringComparison.Ordinal))
+                is IEdmPropertyConstructor property &&
                 property.Value is IEdmEnumMemberExpression value &&
                 value.EnumMembers != null &&
-                value.EnumMembers.Any() &&
-                Enum.TryParse(value.EnumMembers.First().Name, out T result)) ?
-                result :
-                null;
+                value.EnumMembers.Any())
+            {
+                long combinedValue = 0;
+                foreach (var enumMember in value.EnumMembers)
+                {
+                    if (Enum.TryParse(enumMember.Name, out T enumValue))
+                    {
+                        combinedValue |= Convert.ToInt64(enumValue);
+                    }
+                }
+
+                return (T)Enum.ToObject(typeof(T), combinedValue);
+            }
+
+            return null;
         }
 
         /// <summary>

src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj

@@ -15,15 +15,16 @@
     <TargetFrameworks>net8.0</TargetFrameworks>
     <PackageId>Microsoft.OpenApi.OData</PackageId>
     <SignAssembly>true</SignAssembly>
-    <Version>2.0.0-preview.1</Version>
+    <Version>2.0.0-preview.2</Version>
     <Description>This package contains the codes you need to convert OData CSDL to Open API Document of Model.</Description>
     <Copyright>© Microsoft Corporation. All rights reserved.</Copyright>
     <PackageTags>Microsoft OpenApi OData EDM</PackageTags>
     <RepositoryUrl>https://github.com/Microsoft/OpenAPI.NET.OData</RepositoryUrl>
     <PackageReleaseNotes>
 		- Upgraded to Microsoft.Odata.Edm 8.0.0
-    - Cleaned up obsolete APIs
-    - Changed target framework to net8.0
+		- Cleaned up obsolete APIs
+		- Changed target framework to net8.0
+		- Adds support for retrieving collection of enum values from UpdateMethod property of UpdateRestrictions annotation #564
 	</PackageReleaseNotes>
     <AssemblyName>Microsoft.OpenApi.OData.Reader</AssemblyName>
     <AssemblyOriginatorKeyFile>..\..\tool\Microsoft.OpenApi.OData.snk</AssemblyOriginatorKeyFile>

src/Microsoft.OpenApi.OData.Reader/PathItem/ComplexPropertyItemHandler.cs

@@ -70,7 +70,12 @@ public void AddUpdateOperation(OpenApiPathItem item)
         if ((Context.Settings.RequireRestrictionAnnotationsToGenerateComplexPropertyPaths && isUpdatable) ||
             !Context.Settings.RequireRestrictionAnnotationsToGenerateComplexPropertyPaths)
         {
-            if (updateRestrictions != null && updateRestrictions.IsUpdateMethodPut)
+            if (updateRestrictions?.IsUpdateMethodPutAndPatch == true)
+            {
+                AddOperation(item, OperationType.Put);
+                AddOperation(item, OperationType.Patch);
+            }
+            else if (updateRestrictions?.IsUpdateMethodPut == true)
             {
                 AddOperation(item, OperationType.Put);
             }

src/Microsoft.OpenApi.OData.Reader/PathItem/EntityPathItemHandler.cs

@@ -40,7 +40,12 @@ protected override void SetOperations(OpenApiPathItem item)
             updateRestrictions ??= entityUpdateRestrictions;
             if (updateRestrictions?.IsUpdatable ?? true)
             {
-                if (updateRestrictions != null && updateRestrictions.IsUpdateMethodPut)
+                if (updateRestrictions?.IsUpdateMethodPutAndPatch == true)
+                {
+                    AddOperation(item, OperationType.Put);
+                    AddOperation(item, OperationType.Patch);
+                }
+                else if (updateRestrictions?.IsUpdateMethodPut == true)
                 {
                     AddOperation(item, OperationType.Put);
                 }

src/Microsoft.OpenApi.OData.Reader/PathItem/NavigationPropertyPathItemHandler.cs

@@ -243,17 +243,23 @@ private void AddDeleteOperation(OpenApiPathItem item, NavigationPropertyRestrict
 
         private void AddUpdateOperation(OpenApiPathItem item, UpdateRestrictionsType updateRestrictionsType)
         {
-            if (updateRestrictionsType == null || updateRestrictionsType.IsUpdatable)
-            {
-                if (updateRestrictionsType != null && updateRestrictionsType.IsUpdateMethodPut)
-                {
-                    AddOperation(item, OperationType.Put);
-                }
-                else
-                {
-                    AddOperation(item, OperationType.Patch);
-                }
-            }
+            if (updateRestrictionsType?.IsUpdatable ?? true)
+            {
+                if (updateRestrictionsType?.IsUpdateMethodPutAndPatch == true)
+                {
+                    AddOperation(item, OperationType.Put);
+                    AddOperation(item, OperationType.Patch);
+                }
+                else if (updateRestrictionsType?.IsUpdateMethodPut == true)
+                {
+                    AddOperation(item, OperationType.Put);
+                }
+                else
+                {
+                    AddOperation(item, OperationType.Patch);
+                }
+            }
+
         }
 
         /// <inheritdoc/>

src/Microsoft.OpenApi.OData.Reader/Vocabulary/Capabilities/UpdateRestrictionsType.cs

@@ -3,6 +3,7 @@
 //  Licensed under the MIT License (MIT). See LICENSE in the repo root for license information.
 // ------------------------------------------------------------
 
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using Microsoft.OData.Edm.Vocabularies;
@@ -14,17 +15,18 @@ namespace Microsoft.OpenApi.OData.Vocabulary.Capabilities
     /// <summary>
     /// Enumerates HTTP methods that can be used to update entities
     /// </summary>
+    [Flags]
     internal enum HttpMethod
     {
         /// <summary>
         /// The HTTP PATCH Method
         /// </summary>
-        PATCH,
+        PATCH = 1,
 
         /// <summary>
         /// The HTTP PUT Method
         /// </summary>
-        PUT
+        PUT = 2
     }
     /// <summary>
     /// Complex Type: Org.OData.Capabilities.V1.UpdateRestrictionsType
@@ -46,10 +48,10 @@ internal class UpdateRestrictionsType : IRecord
         /// <summary>
         /// Gets the value indicating Entities can be inserted, updated, and deleted via a PATCH request with a delta payload.
         /// </summary>
-        public bool? DeltaUpdateSupported { get; private set; }
-
+        public bool? DeltaUpdateSupported { get; private set; }      
+
         /// <summary>
-        /// Gets the value indicating the HTTP Method (PUT or PATCH) for updating an entity. 
+        /// Gets the values indicating the HTTP Method (PUT and/or PATCH) for updating an entity. 
         /// If null, PATCH should be supported and PUT MAY be supported.
         /// </summary>
         public HttpMethod? UpdateMethod { get; private set; }
@@ -124,10 +126,16 @@ public bool IsNonUpdatableNavigationProperty(string navigationPropertyPath)
         }
 
         /// <summary>
-        /// Tests whether the update method for the entity has been explicitly specified as PUT
+        /// Tests whether the update method for the target has been explicitly specified as PUT
         /// </summary>
         public bool IsUpdateMethodPut => UpdateMethod.HasValue && UpdateMethod.Value == HttpMethod.PUT;
 
+        /// <summary>
+        /// Tests whether the update method for the target has been explicitly specified as PATCH and PUT
+        /// </summary>
+        public bool IsUpdateMethodPutAndPatch => UpdateMethod.HasValue &&
+            (UpdateMethod.Value & (HttpMethod.PUT | HttpMethod.PATCH)) == (HttpMethod.PUT | HttpMethod.PATCH);
+
         /// <summary>
         /// Lists the media types acceptable for the request content
         /// </summary>
@@ -157,7 +165,7 @@ public void Initialize(IEdmRecordExpression record)
             // DeltaUpdateSupported
             DeltaUpdateSupported = record.GetBoolean("DeltaUpdateSupported");
 
-            // UpdateMethod
+            // UpdateMethod
             UpdateMethod = record.GetEnum<HttpMethod>("UpdateMethod");
 
             // FilterSegmentSupported

test/Microsoft.OpenAPI.OData.Reader.Tests/PathItem/NavigationPropertyPathItemHandlerTests.cs

@@ -452,7 +452,7 @@ public void CreatePathItemForNavigationPropertyAndUpdateMethodUpdateRestrictions
           <PropertyValue Property=""UpdateRestrictions"" >
             <Record>
               <PropertyValue Property=""UpdateMethod"">
-                <EnumMember>Org.OData.Capabilities.V1.HttpMethod/PUT</EnumMember>
+                <EnumMember>Org.OData.Capabilities.V1.HttpMethod/PUT Org.OData.Capabilities.V1.HttpMethod/PATCH </EnumMember>
               </PropertyValue>
               <PropertyValue Property=""Updatable"" Bool=""{1}"" />
             </Record>
@@ -488,21 +488,21 @@ public void CreatePathItemForNavigationPropertyAndUpdateMethodUpdateRestrictions
                 if (isContainment)
                 {
                     expected = updatable
-                        ? (new[] { OperationType.Get, OperationType.Put, OperationType.Delete })
-                        : (new[] { OperationType.Get, OperationType.Delete });
+                        ? ([OperationType.Get, OperationType.Put, OperationType.Patch, OperationType.Delete])
+                        : ([OperationType.Get, OperationType.Delete]);
                 }
                 else
                 {
                     expected = updatable
-                        ? (new[] { OperationType.Get, OperationType.Put })
-                        : (new[] { OperationType.Get });
+                        ? ([OperationType.Get, OperationType.Put, OperationType.Patch,])
+                        : ([OperationType.Get]);
                 }
             }
             else
             {
                 expected = isContainment
-                    ? (new[] { OperationType.Get, OperationType.Patch, OperationType.Delete })
-                    : (new[] { OperationType.Get });
+                    ? ([OperationType.Get, OperationType.Patch, OperationType.Delete])
+                    : ([OperationType.Get]);
 
             }