Refine mgmt reference type

src/AutoRest.CSharp/Common/Generation/Writers/ModelWriter.cs

@@ -10,6 +10,7 @@
 using AutoRest.CSharp.Common.Output.Expressions.ValueExpressions;
 using AutoRest.CSharp.Common.Output.Models.Types;
 using AutoRest.CSharp.Generation.Types;
+using AutoRest.CSharp.Mgmt.Output;
 using AutoRest.CSharp.Output.Models;
 using AutoRest.CSharp.Output.Models.Types;
 using Microsoft.CodeAnalysis;
@@ -123,7 +124,7 @@ private void WriteFieldModifiers(CodeWriter writer, FieldModifiers modifiers)
         private void WriteProperty(CodeWriter writer, ObjectTypeProperty property, ObjectType objectType)
         {
             writer.WriteXmlDocumentationSummary(CreatePropertyDescription(property));
-            if (Configuration.EnableBicepSerialization && objectType.Declaration.Accessibility == "public" && property.Declaration.Accessibility == "public")
+            if (!MgmtReferenceType.IsReferenceType(objectType) && Configuration.EnableBicepSerialization && objectType.Declaration.Accessibility == "public" && property.Declaration.Accessibility == "public")
             {
                 writer.Line($"[WirePath(\"{property.GetWirePath()}\")]");
             }

src/AutoRest.CSharp/Common/Input/CodeModelPartials.cs

@@ -124,16 +124,6 @@ public string[] Formats
 
         public bool SkipEncoding => TryGetValue("x-ms-skip-url-encoding", out var value) && Convert.ToBoolean(value);
 
-        public bool MgmtReferenceType => TryGetValue("x-ms-mgmt-referenceType", out var value) && Convert.ToBoolean(value);
-
-        public bool MgmtPropertyReferenceType => TryGetValue("x-ms-mgmt-propertyReferenceType", out var value) && Convert.ToBoolean(value);
-
-        /// <summary>
-        /// Indicate whether the definition has property <c>x-ms-mgmt-typeReferenceType</c> defined as <c>true</c>.
-        /// See: https://github.com/Azure/azure-sdk-for-net/blob/main/sdk/resourcemanager/Azure.ResourceManager/src/autorest.md
-        /// </summary>
-        public bool MgmtTypeReferenceType => TryGetValue("x-ms-mgmt-typeReferenceType", out var value) && Convert.ToBoolean(value);
-
         public string? Format
         {
             get

src/AutoRest.CSharp/Common/Output/Models/Types/SchemaObjectType.cs

@@ -17,9 +17,9 @@
 using AutoRest.CSharp.Input;
 using AutoRest.CSharp.Input.Source;
 using AutoRest.CSharp.Mgmt.AutoRest;
+using AutoRest.CSharp.Mgmt.Output;
 using AutoRest.CSharp.Output.Builders;
 using AutoRest.CSharp.Output.Models.Requests;
-using AutoRest.CSharp.Output.Models.Serialization;
 using AutoRest.CSharp.Output.Models.Serialization.Bicep;
 using AutoRest.CSharp.Output.Models.Serialization.Json;
 using AutoRest.CSharp.Output.Models.Serialization.Xml;
@@ -76,7 +76,7 @@ protected SchemaObjectType(ObjectSchema objectSchema, string defaultNamespace, T
             IsUnknownDerivedType = objectSchema.IsUnknownDiscriminatorModel;
             // we skip the init ctor when there is an extension telling us to, or when this is an unknown derived type in a discriminated set
             SkipInitializerConstructor = ObjectSchema is { Extensions.SkipInitCtor: true } || IsUnknownDerivedType;
-            IsInheritableCommonType = ObjectSchema is { Extensions: { } extensions } && (extensions.MgmtReferenceType || extensions.MgmtTypeReferenceType);
+            IsInheritableCommonType = MgmtReferenceType.IsTypeReferenceType(ObjectSchema) || MgmtReferenceType.IsReferenceType(ObjectSchema);
 
             JsonConverter = _usage.HasFlag(SchemaTypeUsage.Converter) ? new JsonConverterProvider(this, _sourceInputModel) : null;
         }
@@ -91,7 +91,7 @@ protected SchemaObjectType(ObjectSchema objectSchema, string defaultNamespace, T
         private bool _hasCalculatedDefaultDerivedType;
         public SerializableObjectType? DefaultDerivedType => _defaultDerivedType ??= BuildDefaultDerivedType();
 
-        protected override bool IsAbstract => !Configuration.SuppressAbstractBaseClasses.Contains(DefaultName) && ObjectSchema.Discriminator?.All != null && ObjectSchema.DiscriminatorValue == null;
+        protected override bool IsAbstract => MgmtReferenceType.IsReferenceType(ObjectSchema) || (!Configuration.SuppressAbstractBaseClasses.Contains(DefaultName) && ObjectSchema.Discriminator?.All != null && ObjectSchema.DiscriminatorValue == null);
 
         public override ObjectTypeProperty? AdditionalPropertiesProperty
         {
@@ -755,7 +755,7 @@ protected override bool EnsureIncludeDeserializer()
 
         protected override JsonObjectSerialization? BuildJsonSerialization()
         {
-            return _supportedSerializationFormats.Contains(KnownMediaType.Json) ? _serializationBuilder.BuildJsonObjectSerialization(ObjectSchema, this) : null;
+            return MgmtReferenceType.IsReferenceType(ObjectSchema) ? null: _supportedSerializationFormats.Contains(KnownMediaType.Json) ? _serializationBuilder.BuildJsonObjectSerialization(ObjectSchema, this) : null;
         }
 
         protected override BicepObjectSerialization? BuildBicepSerialization(JsonObjectSerialization? json)

src/AutoRest.CSharp/Mgmt/AutoRest/MgmtOutputLibrary.cs

@@ -5,7 +5,6 @@
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
-using System.Reflection.Metadata.Ecma335;
 using AutoRest.CSharp.Common.Input;
 using AutoRest.CSharp.Common.Output.Builders;
 using AutoRest.CSharp.Generation.Types;
@@ -820,7 +819,7 @@ public IEnumerable<Resource> FindResources(ResourceData resourceData)
         private TypeProvider BuildModel(Schema schema) => schema switch
         {
             SealedChoiceSchema or ChoiceSchema => new EnumType(_schemaToInputEnumMap[schema], schema, MgmtContext.Context),
-            ObjectSchema objectSchema => schema.Extensions != null && (schema.Extensions.MgmtReferenceType || schema.Extensions.MgmtPropertyReferenceType || schema.Extensions.MgmtTypeReferenceType)
+            ObjectSchema objectSchema => (MgmtReferenceType.IsPropertyReferenceType(schema) || MgmtReferenceType.IsTypeReferenceType(schema) || MgmtReferenceType.IsReferenceType(schema))
                 ? new MgmtReferenceType(objectSchema)
                 : new MgmtObjectType(objectSchema),
             _ => throw new NotImplementedException($"Unhandled schema type {schema.GetType()} with name {schema.Name}")

src/AutoRest.CSharp/Mgmt/AutoRest/MgmtTarget.cs

@@ -293,13 +293,6 @@ private static void WriteArmModel(GeneratedCodeWorkspace project, TypeProvider m
 
             AddGeneratedFile(project, modelFileName, codeWriter.ToString());
 
-            if (model is MgmtReferenceType mgmtReferenceType)
-            {
-                var extensions = mgmtReferenceType.ObjectSchema.Extensions;
-                if (extensions != null && extensions.MgmtReferenceType)
-                    return;
-            }
-
             WriteSerialization(project, model, serializeWriter, serializationFileName);
         }
 

src/AutoRest.CSharp/Mgmt/Generation/ReferenceTypeWriter.cs

@@ -15,23 +15,32 @@ protected override void AddClassAttributes(CodeWriter writer, ObjectType objectT
         {
             if (objectType is not SchemaObjectType schema)
                 return;
-            var extensions = schema.ObjectSchema.Extensions;
-            if (extensions != null)
+
+            if (MgmtReferenceType.IsPropertyReferenceType(schema.ObjectSchema))
             {
                 if (Configuration.IsBranded)
-                    writer.UseNamespace("Azure.Core");
-                if (extensions.MgmtReferenceType)
                 {
-                    writer.Line($"[{ReferenceClassFinder.ReferenceTypeAttribute}]");
+                    writer.UseNamespace("Azure.Core");
                 }
-                else if (extensions.MgmtPropertyReferenceType)
+                writer.Line($"[{ReferenceClassFinder.PropertyReferenceTypeAttribute}]");
+            }
+            else if (MgmtReferenceType.IsTypeReferenceType(schema.ObjectSchema))
+            {
+                if (Configuration.IsBranded)
                 {
-                    writer.Line($"[{ReferenceClassFinder.PropertyReferenceTypeAttribute}]");
+                    writer.UseNamespace("Azure.Core");
                 }
-                else if (extensions.MgmtTypeReferenceType)
+                writer.Line($"[{ReferenceClassFinder.TypeReferenceTypeAttribute}]");
+            }
+            else if (MgmtReferenceType.IsReferenceType(schema.ObjectSchema))
+            {
+                if (Configuration.IsBranded)
                 {
-                    writer.Line($"[{ReferenceClassFinder.TypeReferenceTypeAttribute}]");
+                    writer.UseNamespace("Azure.Core");
                 }
+
+                // The hard-coded string input is needed for ReferenceTypeAttribute to work, and this only applies to ResourceData and TrackedResourceData now.
+                writer.Line($"[{ReferenceClassFinder.ReferenceTypeAttribute}(new string[]{{\"SystemData\"}})]");
             }
         }
 

src/AutoRest.CSharp/Mgmt/Output/MgmtReferenceType.cs

@@ -1,8 +1,7 @@
 // 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.Linq;
+using System.Collections.Generic;
 using AutoRest.CSharp.Common.Input;
 using AutoRest.CSharp.Generation.Types;
 using AutoRest.CSharp.Input;
@@ -14,23 +13,74 @@ namespace AutoRest.CSharp.Mgmt.Output
 {
     internal class MgmtReferenceType : MgmtObjectType
     {
+        private static HashSet<string> PropertyReferenceTypeModels = new HashSet<string>
+        {
+            "Azure.ResourceManager.Models.ArmPlan",
+            "Azure.ResourceManager.Models.ArmSku",
+            "Azure.ResourceManager.Models.EncryptionProperties",
+            "Azure.ResourceManager.Resources.Models.ExtendedLocation",
+            "Azure.ResourceManager.Models.ManagedServiceIdentity",
+            "Azure.ResourceManager.Models.KeyVaultProperties",
+            "Azure.ResourceManager.Resources.ResourceProviderData",
+            "Azure.ResourceManager.Models.SystemAssignedServiceIdentity",
+            "Azure.ResourceManager.Models.SystemData",
+            "Azure.ResourceManager.Models.UserAssignedIdentity",
+            "Azure.ResourceManager.Resources.Models.WritableSubResource"
+        };
+
+        private static HashSet<string> TypeReferenceTypeModels = new HashSet<string>
+        {
+            "Azure.ResourceManager.Models.OperationStatusResult"
+        };
+
+        private static HashSet<string> ReferenceTypeModels = new HashSet<string>
+        {
+            "Azure.ResourceManager.Models.ResourceData",
+            "Azure.ResourceManager.Models.TrackedResourceData"
+        };
+
+        public static bool IsPropertyReferenceType(Schema schema)
+            => PropertyReferenceTypeModels.Contains($"{GetNamespace(schema)}.{schema.Language.Default.Name}");
+
+        public static bool IsTypeReferenceType(Schema schema)
+            => TypeReferenceTypeModels.Contains($"{GetNamespace(schema)}.{schema.Language.Default.Name}");
+
+        public static bool IsReferenceType(ObjectType schema)
+            => ReferenceTypeModels.Contains($"{schema.Declaration.Namespace}.{schema.Declaration.Name}");
+
+        public static bool IsReferenceType(Schema schema)
+            => ReferenceTypeModels.Contains($"{GetNamespace(schema)}.{schema.Language.Default.Name}");
+
+        private static string GetNamespace(Schema schema)
+        {
+            if (!string.IsNullOrEmpty(schema.Extensions?.Namespace))
+            {
+                return schema.Extensions.Namespace;
+            }
+
+            if (!string.IsNullOrEmpty(schema.Language.Default.Namespace))
+            {
+                return schema.Language.Default.Namespace;
+            }
+
+            return $"{Configuration.Namespace}.Models";
+        }
+
         public MgmtReferenceType(ObjectSchema objectSchema, string? name = default, string? nameSpace = default) : base(objectSchema, name, nameSpace)
         {
-            JsonConverter = (ObjectSchema.Extensions?.MgmtPropertyReferenceType == true || ObjectSchema.Extensions?.MgmtTypeReferenceType == true) && ObjectSchema.Extensions?.MgmtReferenceType != true
+            JsonConverter = (IsPropertyReferenceType(objectSchema) || IsTypeReferenceType(ObjectSchema))
                 ? new JsonConverterProvider(this, _sourceInputModel)
                 : null;
         }
 
-        protected override bool IsAbstract => !Configuration.SuppressAbstractBaseClasses.Contains(DefaultName) && ObjectSchema.Extensions?.MgmtReferenceType is true;
-
         protected override ObjectTypeProperty CreatePropertyType(ObjectTypeProperty objectTypeProperty)
         {
             if (objectTypeProperty.ValueType != null && objectTypeProperty.ValueType.IsFrameworkType)
             {
                 var newProperty = ReferenceTypePropertyChooser.GetExactMatchForReferenceType(objectTypeProperty, objectTypeProperty.ValueType.FrameworkType);
                 if (newProperty != null)
                 {
-                    string fullSerializedName = this.GetFullSerializedName(objectTypeProperty);
+                    string fullSerializedName = GetFullSerializedName(objectTypeProperty);
                     MgmtReport.Instance.TransformSection.AddTransformLogForApplyChange(
                         new TransformItem(TransformTypeName.ReplacePropertyType, fullSerializedName),
                        fullSerializedName,
@@ -42,10 +92,7 @@ protected override ObjectTypeProperty CreatePropertyType(ObjectTypeProperty obje
             return objectTypeProperty;
         }
 
-        protected override CSharpType? CreateInheritedType()
-        {
-            return ObjectSchema.Extensions?.MgmtReferenceType == true ? CreateInheritedTypeWithNoExtraMatch() : base.CreateInheritedType();
-        }
+        protected override CSharpType? CreateInheritedType() => base.CreateInheritedType();
 
         // the reference types do not need raw data field
         public override ObjectTypeProperty? RawDataField => null;

src/AutoRest.CSharp/Properties/launchSettings.json

@@ -432,10 +432,6 @@
       "commandName": "Project",
       "commandLineArgs": "--standalone $(SolutionDir)\\test\\TestProjects\\MgmtPropertyChooser\\src\\Generated -n"
     },
-    "MgmtReferenceTypes": {
-      "commandName": "Project",
-      "commandLineArgs": "--standalone $(SolutionDir)\\test\\TestProjects\\MgmtReferenceTypes\\src\\Generated -n"
-    },
     "MgmtResourceName": {
       "commandName": "Project",
       "commandLineArgs": "--standalone $(SolutionDir)\\test\\TestProjects\\MgmtResourceName\\src\\Generated -n"