Update to Microsoft.OpenApi v2.0.0-preview.17

eng/Dependencies.props

@@ -70,7 +70,7 @@ and are generated based on the last package release.
     <LatestPackageReference Include="Microsoft.CodeAnalysis.CSharp.CodeFix.Testing" />
     <LatestPackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing" />
     <LatestPackageReference Include="Microsoft.OpenApi" />
-    <LatestPackageReference Include="Microsoft.OpenApi.Readers" />
+    <LatestPackageReference Include="Microsoft.OpenApi.YamlReader" />
     <LatestPackageReference Include="System.Buffers" />
     <LatestPackageReference Include="System.CodeDom" />
     <LatestPackageReference Include="System.CommandLine.Experimental" />

eng/Versions.props

@@ -339,8 +339,8 @@
     <XunitExtensibilityExecutionVersion>$(XunitVersion)</XunitExtensibilityExecutionVersion>
     <XUnitRunnerVisualStudioVersion>2.8.2</XUnitRunnerVisualStudioVersion>
     <MicrosoftDataSqlClientVersion>5.2.2</MicrosoftDataSqlClientVersion>
-    <MicrosoftOpenApiVersion>2.0.0-preview.11</MicrosoftOpenApiVersion>
-    <MicrosoftOpenApiReadersVersion>2.0.0-preview.11</MicrosoftOpenApiReadersVersion>
+    <MicrosoftOpenApiVersion>2.0.0-preview.17</MicrosoftOpenApiVersion>
+    <MicrosoftOpenApiYamlReaderVersion>2.0.0-preview.17</MicrosoftOpenApiYamlReaderVersion>
     <!-- dotnet tool versions (see also auto-updated DotnetEfVersion property). -->
     <DotnetDumpVersion>6.0.322601</DotnetDumpVersion>
     <DotnetServeVersion>1.10.93</DotnetServeVersion>

src/OpenApi/OpenApi.slnf

@@ -17,7 +17,6 @@
       "src\\Servers\\Connections.Abstractions\\src\\Microsoft.AspNetCore.Connections.Abstractions.csproj",
       "src\\OpenApi\\test\\Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests\\Microsoft.AspNetCore.OpenApi.SourceGenerators.Tests.csproj",
       "src\\OpenApi\\test\\Microsoft.AspNetCore.OpenApi.Tests\\Microsoft.AspNetCore.OpenApi.Tests.csproj",
-      "src\\OpenApi\\sample\\Sample.csproj",
       "src\\OpenApi\\perf\\Microbenchmarks\\Microsoft.AspNetCore.OpenApi.Microbenchmarks.csproj"
     ]
   }

src/OpenApi/gen/XmlCommentGenerator.Emitter.cs

@@ -59,6 +59,7 @@ namespace Microsoft.AspNetCore.OpenApi.Generated
     using Microsoft.AspNetCore.Mvc.Controllers;
     using Microsoft.Extensions.DependencyInjection;
     using Microsoft.OpenApi.Models;
+    using Microsoft.OpenApi.Models.Interfaces;
     using Microsoft.OpenApi.Models.References;
     using Microsoft.OpenApi.Any;
 
@@ -341,9 +342,7 @@ public Task TransformAsync(OpenApiOperation operation, OpenApiOperationTransform
                         var operationParameter = operation.Parameters?.SingleOrDefault(parameter => parameter.Name == parameterComment.Name);
                         if (operationParameter is not null)
                         {
-                            var targetOperationParameter = operationParameter is OpenApiParameterReference reference
-                                ? reference.Target
-                                : (OpenApiParameter)operationParameter;
+                            var targetOperationParameter = UnwrapOpenApiParameter(operationParameter);
                             targetOperationParameter.Description = parameterComment.Description;
                             if (parameterComment.Example is { } jsonString)
                             {
@@ -359,7 +358,12 @@ public Task TransformAsync(OpenApiOperation operation, OpenApiOperationTransform
                                 requestBody.Description = parameterComment.Description;
                                 if (parameterComment.Example is { } jsonString)
                                 {
-                                    foreach (var mediaType in requestBody.Content.Values)
+                                    var content = requestBody?.Content?.Values;
+                                    if (content is null)
+                                    {
+                                        continue;
+                                    }
+                                    foreach (var mediaType in content)
                                     {
                                         mediaType.Example = jsonString.Parse();
                                     }
@@ -383,6 +387,29 @@ public Task TransformAsync(OpenApiOperation operation, OpenApiOperationTransform
 
             return Task.CompletedTask;
         }
+
+        private static OpenApiParameter UnwrapOpenApiParameter(IOpenApiParameter sourceParameter)
+        {
+            if (sourceParameter is OpenApiParameterReference parameterReference)
+            {
+                if (parameterReference.Target is OpenApiParameter target)
+                {
+                    return target;
+                }
+                else
+                {
+                    throw new InvalidOperationException("The input schema must be an OpenApiSchema or OpenApiSchemaReference.");
+                }
+            }
+            else if (sourceParameter is OpenApiParameter directParameter)
+            {
+                return directParameter;
+            }
+            else
+            {
+                throw new InvalidOperationException("The input schema must be an OpenApiSchema or OpenApiSchemaReference.");
+            }
+        }
     }
 
     {{GeneratedCodeAttribute}}

src/OpenApi/src/Extensions/ApiDescriptionExtensions.cs

@@ -4,30 +4,30 @@
 using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
+using System.Net.Http;
 using System.Text;
 using Microsoft.AspNetCore.Mvc.ApiExplorer;
 using Microsoft.AspNetCore.Mvc.ModelBinding;
 using Microsoft.AspNetCore.Routing.Patterns;
-using Microsoft.OpenApi.Models;
 
 internal static class ApiDescriptionExtensions
 {
     /// <summary>
-    /// Maps the HTTP method of the ApiDescription to the OpenAPI <see cref="OperationType"/> .
+    /// Maps the HTTP method of the ApiDescription to the HttpMethod.
     /// </summary>
-    /// <param name="apiDescription">The ApiDescription to resolve an operation type from.</param>
-    /// <returns>The <see cref="OperationType"/> associated with the given <paramref name="apiDescription"/>.</returns>
-    public static OperationType GetOperationType(this ApiDescription apiDescription) =>
+    /// <param name="apiDescription">The ApiDescription to resolve an HttpMethod from.</param>
+    /// <returns>The <see cref="HttpMethod"/> associated with the given <paramref name="apiDescription"/>.</returns>
+    public static HttpMethod GetHttpMethod(this ApiDescription apiDescription) =>
         apiDescription.HttpMethod?.ToUpperInvariant() switch
         {
-            "GET" => OperationType.Get,
-            "POST" => OperationType.Post,
-            "PUT" => OperationType.Put,
-            "DELETE" => OperationType.Delete,
-            "PATCH" => OperationType.Patch,
-            "HEAD" => OperationType.Head,
-            "OPTIONS" => OperationType.Options,
-            "TRACE" => OperationType.Trace,
+            "GET" => HttpMethod.Get,
+            "POST" => HttpMethod.Post,
+            "PUT" => HttpMethod.Put,
+            "DELETE" => HttpMethod.Delete,
+            "PATCH" => HttpMethod.Patch,
+            "HEAD" => HttpMethod.Head,
+            "OPTIONS" => HttpMethod.Options,
+            "TRACE" => HttpMethod.Trace,
             _ => throw new InvalidOperationException($"Unsupported HTTP method: {apiDescription.HttpMethod}"),
         };
 

src/OpenApi/src/Extensions/JsonNodeSchemaExtensions.cs

@@ -386,7 +386,7 @@ internal static void MapPolymorphismOptionsToDiscriminator(this JsonNode schema,
                     // that we hardcode here. We could use `OpenApiReference` to construct the reference and
                     // serialize it but we use a hardcoded string here to avoid allocating a new object and
                     // working around Microsoft.OpenApi's serialization libraries.
-                    mappings[$"{discriminator}"] = $"#/components/schemas/{createSchemaReferenceId(context.TypeInfo)}{createSchemaReferenceId(jsonDerivedType)}";
+                    mappings[$"{discriminator}"] = $"{createSchemaReferenceId(context.TypeInfo)}{createSchemaReferenceId(jsonDerivedType)}";
                 }
             }
             schema[OpenApiSchemaKeywords.DiscriminatorKeyword] = polymorphismOptions.TypeDiscriminatorPropertyName;

src/OpenApi/src/Schemas/OpenApiJsonSchema.Helpers.cs

@@ -2,13 +2,15 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System.Diagnostics;
+using System.Globalization;
 using System.Linq;
 using System.Text.Json;
 using System.Text.Json.Nodes;
 using System.Text.Json.Serialization;
 using Microsoft.AspNetCore.OpenApi;
 using Microsoft.OpenApi.Models;
 using Microsoft.OpenApi.Models.Interfaces;
+using Microsoft.OpenApi.Models.References;
 using OpenApiConstants = Microsoft.AspNetCore.OpenApi.OpenApiConstants;
 
 internal sealed partial class OpenApiJsonSchema
@@ -256,12 +258,12 @@ public static void ReadProperty(ref Utf8JsonReader reader, string propertyName,
             case OpenApiSchemaKeywords.MinimumKeyword:
                 reader.Read();
                 var minimum = reader.GetDecimal();
-                schema.Minimum = minimum;
+                schema.Minimum = minimum.ToString(CultureInfo.InvariantCulture);
                 break;
             case OpenApiSchemaKeywords.MaximumKeyword:
                 reader.Read();
                 var maximum = reader.GetDecimal();
-                schema.Maximum = maximum;
+                schema.Maximum = maximum.ToString(CultureInfo.InvariantCulture);
                 break;
             case OpenApiSchemaKeywords.PatternKeyword:
                 reader.Read();
@@ -302,25 +304,30 @@ public static void ReadProperty(ref Utf8JsonReader reader, string propertyName,
                 var mappings = ReadDictionary<string>(ref reader);
                 if (mappings is not null)
                 {
-                    schema.Discriminator.Mapping = mappings;
+                    schema.Discriminator ??= new OpenApiDiscriminator();
+                    foreach (var kvp in mappings)
+                    {
+                        schema.Discriminator.Mapping ??= [];
+                        schema.Discriminator.Mapping[kvp.Key] = new OpenApiSchemaReference(kvp.Value);
+                    }
                 }
                 break;
             case OpenApiConstants.SchemaId:
                 reader.Read();
-                schema.Annotations ??= new Dictionary<string, object>();
-                schema.Annotations.Add(OpenApiConstants.SchemaId, reader.GetString());
+                schema.Metadata ??= [];
+                schema.Metadata.Add(OpenApiConstants.SchemaId, reader.GetString() ?? string.Empty);
                 break;
             // OpenAPI does not support the `const` keyword in its schema implementation, so
             // we map it to its closest approximation, an enum with a single value, here.
             case OpenApiSchemaKeywords.ConstKeyword:
                 reader.Read();
-                schema.Enum = [ReadJsonNode(ref reader, out var constType)];
+                schema.Enum = ReadJsonNode(ref reader, out var constType) is { } jsonNode ? [jsonNode] : [];
                 schema.Type = constType;
                 break;
             case OpenApiSchemaKeywords.RefKeyword:
                 reader.Read();
-                schema.Annotations ??= new Dictionary<string, object>();
-                schema.Annotations[OpenApiConstants.RefId] = reader.GetString();
+                schema.Metadata ??= [];
+                schema.Metadata[OpenApiConstants.RefId] = reader.GetString() ?? string.Empty;
                 break;
             default:
                 reader.Skip();

src/OpenApi/src/Services/OpenApiConstants.cs

@@ -1,7 +1,7 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-using Microsoft.OpenApi.Models;
+using System.Net.Http;
 
 namespace Microsoft.AspNetCore.OpenApi;
 
@@ -14,19 +14,19 @@ internal static class OpenApiConstants
     internal const string SchemaId = "x-schema-id";
     internal const string RefId = "x-ref-id";
     internal const string DefaultOpenApiResponseKey = "default";
-    // Since there's a finite set of operation types that can be included in a given
-    // OpenApiPaths, we can pre-allocate an array of these types and use a direct
+    // Since there's a finite set of HTTP methods that can be included in a given
+    // OpenApiPaths, we can pre-allocate an array of these methods and use a direct
     // lookup on the OpenApiPaths dictionary to avoid allocating an enumerator
     // over the KeyValuePairs in OpenApiPaths.
-    internal static readonly OperationType[] OperationTypes = [
-        OperationType.Get,
-        OperationType.Post,
-        OperationType.Put,
-        OperationType.Delete,
-        OperationType.Options,
-        OperationType.Head,
-        OperationType.Patch,
-        OperationType.Trace
+    internal static readonly HttpMethod[] HttpMethods = [
+        HttpMethod.Get,
+        HttpMethod.Post,
+        HttpMethod.Put,
+        HttpMethod.Delete,
+        HttpMethod.Options,
+        HttpMethod.Head,
+        HttpMethod.Patch,
+        HttpMethod.Trace
     ];
     // Represents primitive types that should never be represented as
     // a schema reference and always inlined.