Upgrade to OpenAPI.NET v2.0.0-preview7

eng/Versions.props

@@ -335,8 +335,8 @@
     <XunitExtensibilityExecutionVersion>$(XunitVersion)</XunitExtensibilityExecutionVersion>
     <XUnitRunnerVisualStudioVersion>2.8.2</XUnitRunnerVisualStudioVersion>
     <MicrosoftDataSqlClientVersion>5.2.2</MicrosoftDataSqlClientVersion>
-    <MicrosoftOpenApiVersion>2.0.0-preview5</MicrosoftOpenApiVersion>
-    <MicrosoftOpenApiReadersVersion>2.0.0-preview5</MicrosoftOpenApiReadersVersion>
+    <MicrosoftOpenApiVersion>2.0.0-preview7</MicrosoftOpenApiVersion>
+    <MicrosoftOpenApiReadersVersion>2.0.0-preview7</MicrosoftOpenApiReadersVersion>
     <!-- dotnet tool versions (see also auto-updated DotnetEfVersion property). -->
     <DotnetDumpVersion>6.0.322601</DotnetDumpVersion>
     <DotnetServeVersion>1.10.93</DotnetServeVersion>

src/OpenApi/gen/XmlCommentGenerator.Emitter.cs

@@ -55,6 +55,7 @@ namespace Microsoft.AspNetCore.OpenApi.Generated
     using Microsoft.AspNetCore.Mvc.Controllers;
     using Microsoft.Extensions.DependencyInjection;
     using Microsoft.OpenApi.Models;
+    using Microsoft.OpenApi.Models.References;
     using Microsoft.OpenApi.Any;
 
     {{GeneratedCodeAttribute}}
@@ -256,12 +257,15 @@ public Task TransformAsync(OpenApiOperation operation, OpenApiOperationTransform
                         var operationParameter = operation.Parameters?.SingleOrDefault(parameter => parameter.Name == parameterComment.Name);
                         if (operationParameter is not null)
                         {
-                            operationParameter.Description = parameterComment.Description;
+                            var targetOperationParameter = operationParameter is OpenApiParameterReference reference
+                                ? reference.Target
+                                : (OpenApiParameter)operationParameter;
+                            targetOperationParameter.Description = parameterComment.Description;
                             if (parameterComment.Example is { } jsonString)
                             {
-                                operationParameter.Example = jsonString.Parse();
+                                targetOperationParameter.Example = jsonString.Parse();
                             }
-                            operationParameter.Deprecated = parameterComment.Deprecated;
+                            targetOperationParameter.Deprecated = parameterComment.Deprecated;
                         }
                         else
                         {

src/OpenApi/sample/Program.cs

@@ -1,6 +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 System.Text.Json.Serialization;
 using Microsoft.OpenApi.Models;
 using Sample.Transformers;
 
@@ -11,6 +12,13 @@
 #pragma warning restore IL2026
 builder.Services.AddAuthentication().AddJwtBearer();
 
+// Supports representing integer formats as strictly numerically values
+// inside the schema.
+builder.Services.ConfigureHttpJsonOptions(options =>
+{
+    options.SerializerOptions.NumberHandling = JsonNumberHandling.Strict;
+});
+
 builder.Services.AddOpenApi("v1", options =>
 {
     options.AddHeader("X-Version", "1.0");

src/OpenApi/sample/Transformers/AddBearerSecuritySchemeTransformer.cs

@@ -4,6 +4,7 @@
 using Microsoft.AspNetCore.Authentication;
 using Microsoft.AspNetCore.OpenApi;
 using Microsoft.OpenApi.Models;
+using Microsoft.OpenApi.Models.Interfaces;
 
 namespace Sample.Transformers;
 
@@ -14,7 +15,7 @@ public async Task TransformAsync(OpenApiDocument document, OpenApiDocumentTransf
         var authenticationSchemes = await authenticationSchemeProvider.GetAllSchemesAsync();
         if (authenticationSchemes.Any(authScheme => authScheme.Name == "Bearer"))
         {
-            var requirements = new Dictionary<string, OpenApiSecurityScheme>
+            var requirements = new Dictionary<string, IOpenApiSecurityScheme>
             {
                 ["Bearer"] = new OpenApiSecurityScheme
                 {

src/OpenApi/src/Extensions/JsonNodeSchemaExtensions.cs

@@ -120,8 +120,15 @@ internal static void ApplyValidationAttributes(this JsonNode schema, IEnumerable
             }
             else if (attribute is MinLengthAttribute minLengthAttribute)
             {
-                var targetKey = schema[OpenApiSchemaKeywords.TypeKeyword]?.GetValue<string>() == "array" ? OpenApiSchemaKeywords.MinItemsKeyword : OpenApiSchemaKeywords.MinLengthKeyword;
-                schema[targetKey] = minLengthAttribute.Length;
+                if (MapJsonNodeToSchemaType(schema[OpenApiSchemaKeywords.TypeKeyword]) is { } schemaTypes &&
+                    schemaTypes.HasFlag(JsonSchemaType.Array))
+                {
+                    schema[OpenApiSchemaKeywords.MinItemsKeyword] = minLengthAttribute.Length;
+                }
+                else
+                {
+                    schema[OpenApiSchemaKeywords.MinLengthKeyword] = minLengthAttribute.Length;
+                }
             }
             else if (attribute is LengthAttribute lengthAttribute)
             {
@@ -191,14 +198,13 @@ internal static void ApplyPrimitiveTypesAndFormats(this JsonNode schema, JsonSch
         var underlyingType = Nullable.GetUnderlyingType(type);
         if (_simpleTypeToOpenApiSchema.TryGetValue(underlyingType ?? type, out var openApiSchema))
         {
-            schema[OpenApiSchemaKeywords.NullableKeyword] = openApiSchema.Nullable || (schema[OpenApiSchemaKeywords.TypeKeyword] is JsonArray schemaType && schemaType.GetValues<string>().Contains("null"));
-            schema[OpenApiSchemaKeywords.TypeKeyword] = openApiSchema.Type.ToString();
+            if (underlyingType != null && MapJsonNodeToSchemaType(schema[OpenApiSchemaKeywords.TypeKeyword]) is { } schemaTypes &&
+                !schemaTypes.HasFlag(JsonSchemaType.Null))
+            {
+                schema[OpenApiSchemaKeywords.TypeKeyword] = (schemaTypes | JsonSchemaType.Null).ToString();
+            }
             schema[OpenApiSchemaKeywords.FormatKeyword] = openApiSchema.Format;
             schema[OpenApiConstants.SchemaId] = createSchemaReferenceId(context.TypeInfo);
-            schema[OpenApiSchemaKeywords.NullableKeyword] = underlyingType != null;
-            // Clear out patterns that the underlying JSON schema generator uses to represent
-            // validations for DateTime, DateTimeOffset, and integers.
-            schema[OpenApiSchemaKeywords.PatternKeyword] = null;
         }
     }
 
@@ -334,14 +340,17 @@ internal static void ApplyParameterInfo(this JsonNode schema, ApiParameterDescri
             schema.ApplyRouteConstraints(constraints);
         }
 
-        if (parameterDescription.Source is { } bindingSource && SupportsNullableProperty(bindingSource))
+        if (parameterDescription.Source is { } bindingSource
+            && SupportsNullableProperty(bindingSource)
+            && MapJsonNodeToSchemaType(schema[OpenApiSchemaKeywords.TypeKeyword]) is { } schemaTypes &&
+            schemaTypes.HasFlag(JsonSchemaType.Null))
         {
-            schema[OpenApiSchemaKeywords.NullableKeyword] = false;
+            schema[OpenApiSchemaKeywords.TypeKeyword] = (schemaTypes & ~JsonSchemaType.Null).ToString();
         }
 
         // Parameters sourced from the header, query, route, and/or form cannot be nullable based on our binding
         // rules but can be optional.
-        static bool SupportsNullableProperty(BindingSource bindingSource) =>bindingSource == BindingSource.Header
+        static bool SupportsNullableProperty(BindingSource bindingSource) => bindingSource == BindingSource.Header
             || bindingSource == BindingSource.Query
             || bindingSource == BindingSource.Path
             || bindingSource == BindingSource.Form
@@ -435,9 +444,11 @@ internal static void ApplyNullabilityContextInfo(this JsonNode schema, Parameter
 
         var nullabilityInfoContext = new NullabilityInfoContext();
         var nullabilityInfo = nullabilityInfoContext.Create(parameterInfo);
-        if (nullabilityInfo.WriteState == NullabilityState.Nullable)
+        if (nullabilityInfo.WriteState == NullabilityState.Nullable
+            && MapJsonNodeToSchemaType(schema[OpenApiSchemaKeywords.TypeKeyword]) is { } schemaTypes
+            && !schemaTypes.HasFlag(JsonSchemaType.Null))
         {
-            schema[OpenApiSchemaKeywords.NullableKeyword] = true;
+            schema[OpenApiSchemaKeywords.TypeKeyword] = (schemaTypes | JsonSchemaType.Null).ToString();
         }
     }
 
@@ -452,7 +463,54 @@ internal static void ApplyNullabilityContextInfo(this JsonNode schema, JsonPrope
         // all schema (no type, no format, no constraints).
         if (propertyInfo.PropertyType != typeof(object) && (propertyInfo.IsGetNullable || propertyInfo.IsSetNullable))
         {
-            schema[OpenApiSchemaKeywords.NullableKeyword] = true;
+            if (MapJsonNodeToSchemaType(schema[OpenApiSchemaKeywords.TypeKeyword]) is { } schemaTypes &&
+                !schemaTypes.HasFlag(JsonSchemaType.Null))
+            {
+                schema[OpenApiSchemaKeywords.TypeKeyword] = (schemaTypes | JsonSchemaType.Null).ToString();
+            }
+        }
+    }
+
+    private static JsonSchemaType? MapJsonNodeToSchemaType(JsonNode? jsonNode)
+    {
+        if (jsonNode is not JsonArray jsonArray)
+        {
+            if (Enum.TryParse<JsonSchemaType>(jsonNode?.GetValue<string>(), true, out var openApiSchemaType))
+            {
+                return openApiSchemaType;
+            }
+
+            return jsonNode is JsonValue jsonValue && jsonValue.TryGetValue<string>(out var identifier)
+                ? ToSchemaType(identifier)
+                : null;
+        }
+
+        JsonSchemaType? schemaType = null;
+
+        foreach (var node in jsonArray)
+        {
+            if (node is JsonValue jsonValue && jsonValue.TryGetValue<string>(out var identifier))
+            {
+                var type = ToSchemaType(identifier);
+                schemaType = schemaType.HasValue ? (schemaType | type) : type;
+            }
+        }
+
+        return schemaType;
+
+        static JsonSchemaType ToSchemaType(string identifier)
+        {
+            return identifier.ToLowerInvariant() switch
+            {
+                "null" => JsonSchemaType.Null,
+                "boolean" => JsonSchemaType.Boolean,
+                "integer" => JsonSchemaType.Integer,
+                "number" => JsonSchemaType.Number,
+                "string" => JsonSchemaType.String,
+                "array" => JsonSchemaType.Array,
+                "object" => JsonSchemaType.Object,
+                _ => throw new InvalidOperationException($"Unknown schema type: {identifier}"),
+            };
         }
     }
 }

src/OpenApi/src/Extensions/OpenApiDocumentExtensions.cs

@@ -2,24 +2,25 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using Microsoft.OpenApi.Models;
+using Microsoft.OpenApi.Models.Interfaces;
 using Microsoft.OpenApi.Models.References;
 
 namespace Microsoft.AspNetCore.OpenApi;
 
 internal static class OpenApiDocumentExtensions
 {
     /// <summary>
-    /// Registers a <see cref="OpenApiSchema" /> into the top-level components store on the
+    /// Registers a <see cref="IOpenApiSchema" /> into the top-level components store on the
     /// <see cref="OpenApiDocument" /> and returns a resolvable reference to it.
     /// </summary>
     /// <param name="document">The <see cref="OpenApiDocument"/> to register the schema onto.</param>
     /// <param name="schemaId">The ID that serves as the key for the schema in the schema store.</param>
-    /// <param name="schema">The <see cref="OpenApiSchema" /> to register into the document.</param>
-    /// <returns>An <see cref="OpenApiSchema"/> with a reference to the stored schema.</returns>
-    public static OpenApiSchema AddOpenApiSchemaByReference(this OpenApiDocument document, string schemaId, OpenApiSchema schema)
+    /// <param name="schema">The <see cref="IOpenApiSchema" /> to register into the document.</param>
+    /// <returns>An <see cref="IOpenApiSchema"/> with a reference to the stored schema.</returns>
+    public static IOpenApiSchema AddOpenApiSchemaByReference(this OpenApiDocument document, string schemaId, IOpenApiSchema schema)
     {
         document.Components ??= new();
-        document.Components.Schemas ??= new Dictionary<string, OpenApiSchema>();
+        document.Components.Schemas ??= new Dictionary<string, IOpenApiSchema>();
         document.Components.Schemas[schemaId] = schema;
         document.Workspace ??= new();
         var location = document.BaseUri + "/components/schemas/" + schemaId;

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

@@ -8,6 +8,7 @@
 using System.Text.Json.Serialization;
 using Microsoft.AspNetCore.OpenApi;
 using Microsoft.OpenApi.Models;
+using Microsoft.OpenApi.Models.Interfaces;
 using OpenApiConstants = Microsoft.AspNetCore.OpenApi.OpenApiConstants;
 
 internal sealed partial class OpenApiJsonSchema
@@ -220,10 +221,6 @@ public static void ReadProperty(ref Utf8JsonReader reader, string propertyName,
                 var valueConverter = (JsonConverter<OpenApiJsonSchema>)options.GetTypeInfo(typeof(OpenApiJsonSchema)).Converter;
                 schema.Items = valueConverter.Read(ref reader, typeof(OpenApiJsonSchema), options)?.Schema;
                 break;
-            case OpenApiSchemaKeywords.NullableKeyword:
-                reader.Read();
-                schema.Nullable = reader.GetBoolean();
-                break;
             case OpenApiSchemaKeywords.DescriptionKeyword:
                 reader.Read();
                 schema.Description = reader.GetString();
@@ -274,7 +271,7 @@ public static void ReadProperty(ref Utf8JsonReader reader, string propertyName,
             case OpenApiSchemaKeywords.PropertiesKeyword:
                 reader.Read();
                 var props = ReadDictionary<OpenApiJsonSchema>(ref reader);
-                schema.Properties = props?.ToDictionary(p => p.Key, p => p.Value.Schema);
+                schema.Properties = props?.ToDictionary(p => p.Key, p => p.Value.Schema as IOpenApiSchema);
                 break;
             case OpenApiSchemaKeywords.AdditionalPropertiesKeyword:
                 reader.Read();
@@ -290,7 +287,7 @@ public static void ReadProperty(ref Utf8JsonReader reader, string propertyName,
                 reader.Read();
                 schema.Type = JsonSchemaType.Object;
                 var schemas = ReadList<OpenApiJsonSchema>(ref reader);
-                schema.AnyOf = schemas?.Select(s => s.Schema).ToList();
+                schema.AnyOf = schemas?.Select(s => s.Schema as IOpenApiSchema).ToList();
                 break;
             case OpenApiSchemaKeywords.DiscriminatorKeyword:
                 reader.Read();
@@ -322,7 +319,8 @@ public static void ReadProperty(ref Utf8JsonReader reader, string propertyName,
                 break;
             case OpenApiSchemaKeywords.RefKeyword:
                 reader.Read();
-                schema.Reference = new OpenApiReference { Type = ReferenceType.Schema, Id = reader.GetString() };
+                schema.Annotations ??= new Dictionary<string, object>();
+                schema.Annotations[OpenApiConstants.RefId] = reader.GetString();
                 break;
             default:
                 reader.Skip();

src/OpenApi/src/Schemas/OpenApiSchemaKeywords.cs

@@ -12,7 +12,6 @@ internal class OpenApiSchemaKeywords
     public const string AnyOfKeyword = "anyOf";
     public const string EnumKeyword = "enum";
     public const string DefaultKeyword = "default";
-    public const string NullableKeyword = "nullable";
     public const string DescriptionKeyword = "description";
     public const string DiscriminatorKeyword = "discriminatorName";
     public const string DiscriminatorMappingKeyword = "discriminatorMapping";

src/OpenApi/src/Services/OpenApiConstants.cs

@@ -12,6 +12,7 @@ internal static class OpenApiConstants
     internal const string DefaultOpenApiRoute = "/openapi/{documentName}.json";
     internal const string DescriptionId = "x-aspnetcore-id";
     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