Pass through ModelReaderWriter options to SerializationHooks

src/AutoRest.CSharp/Common/Output/Builders/JsonSerializationMethodsBuilder.cs

@@ -247,7 +247,7 @@ private static MethodBodyStatement WritePropertySerialization(Utf8JsonWriterExpr
             {
                 utf8JsonWriter.WritePropertyName(serialization.SerializedName),
                 serialization.CustomSerializationMethodName is {} serializationMethodName
-                    ? InvokeCustomSerializationMethod(serializationMethodName, utf8JsonWriter)
+                    ? InvokeCustomSerializationMethod(serializationMethodName, utf8JsonWriter, options)
                     : SerializeExpression(utf8JsonWriter, serialization.ValueSerialization, serialization.EnumerableValue ?? serialization.Value, options)
             };
         }

src/AutoRest.CSharp/Common/Output/Expressions/Snippets.cs

@@ -4,6 +4,8 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reflection;
+using System.Text.Json;
 using AutoRest.CSharp.Common.Input;
 using AutoRest.CSharp.Common.Output.Expressions;
 using AutoRest.CSharp.Common.Output.Expressions.KnownValueExpressions;
@@ -12,6 +14,7 @@
 using AutoRest.CSharp.Generation.Types;
 using AutoRest.CSharp.Generation.Writers;
 using AutoRest.CSharp.Output.Models.Types;
+using static AutoRest.CSharp.Common.Input.Configuration;
 
 namespace AutoRest.CSharp.Common.Output.Models
 {
@@ -92,13 +95,19 @@ public static StreamExpression InvokeFileOpenRead(string filePath)
         public static StreamExpression InvokeFileOpenWrite(string filePath)
             => new(new InvokeStaticMethodExpression(typeof(System.IO.File), nameof(System.IO.File.OpenWrite), new[] { Literal(filePath) }));
 
-        // Expected signature: MethodName(Utf8JsonWriter writer);
-        public static MethodBodyStatement InvokeCustomSerializationMethod(string methodName, Utf8JsonWriterExpression utf8JsonWriter)
-            => new InvokeInstanceMethodStatement(null, methodName, utf8JsonWriter);
+        // Expected signature: MethodName(Utf8JsonWriter writer, ModelReaderWriterOptions? options);
+        public static MethodBodyStatement InvokeCustomSerializationMethod(string methodName, Utf8JsonWriterExpression utf8JsonWriter, ModelReaderWriterOptionsExpression? options)
+        {
+            // If options is null, the method signature should not include the parameter
+            return options is null
+                ? new InvokeInstanceMethodStatement(null, methodName, utf8JsonWriter)
+                : new InvokeInstanceMethodStatement(null, methodName, utf8JsonWriter, options);
+        }
 
+        // TODO: https://github.com/Azure/autorest.csharp/issues/4633
         // Expected signature: MethodName(StringBuilder builder);
         public static MethodBodyStatement InvokeCustomBicepSerializationMethod(string methodName, StringBuilderExpression stringBuilder)
-            => new InvokeInstanceMethodStatement(null, methodName, stringBuilder);
+        => new InvokeInstanceMethodStatement(null, methodName, stringBuilder);
 
         // Expected signature: MethodName(JsonProperty property, ref T optional)
         public static MethodBodyStatement InvokeCustomDeserializationMethod(string methodName, JsonPropertyExpression jsonProperty, CodeWriterDeclaration variable)

test/TestProjects/Customizations-TypeSpec/src/Customizations/ModelToAddAdditionalSerializableProperty.cs

@@ -3,6 +3,7 @@
 
 #nullable disable
 
+using System.ClientModel.Primitives;
 using System.Runtime.CompilerServices;
 using System.Text.Json;
 using Azure.Core;
@@ -31,7 +32,7 @@ public partial class ModelToAddAdditionalSerializableProperty
         public int RequiredInt { get; set; }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private void WriteRequiredIntValue(Utf8JsonWriter writer)
+        private void WriteRequiredIntValue(Utf8JsonWriter writer, ModelReaderWriterOptions options)
         {
             writer.WriteStringValue(RequiredInt.ToString());
         }
@@ -43,7 +44,7 @@ private static void ReadRequiredIntValue(JsonProperty property, ref int required
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private void WriteRequiredIntOnBaseValue(Utf8JsonWriter writer)
+        private void WriteRequiredIntOnBaseValue(Utf8JsonWriter writer, ModelReaderWriterOptions options)
         {
             writer.WriteStringValue(RequiredIntOnBase.ToString());
         }

test/TestProjects/Customizations-TypeSpec/src/Generated/Models/ModelToAddAdditionalSerializableProperty.Serialization.cs

@@ -28,7 +28,7 @@ void IJsonModel<ModelToAddAdditionalSerializableProperty>.Write(Utf8JsonWriter w
 
             writer.WriteStartObject();
             writer.WritePropertyName("requiredInt"u8);
-            WriteRequiredIntValue(writer);
+            WriteRequiredIntValue(writer, options);
             writer.WritePropertyName("additionalSerializableProperty"u8);
             writer.WriteNumberValue(AdditionalSerializableProperty);
             if (Optional.IsDefined(AdditionalNullableSerializableProperty))
@@ -44,7 +44,7 @@ void IJsonModel<ModelToAddAdditionalSerializableProperty>.Write(Utf8JsonWriter w
                 }
             }
             writer.WritePropertyName("requiredIntOnBase"u8);
-            WriteRequiredIntOnBaseValue(writer);
+            WriteRequiredIntOnBaseValue(writer, options);
             if (Optional.IsDefined(OptionalInt))
             {
                 writer.WritePropertyName("optionalInt"u8);

test/TestProjects/Inheritance/Custom/SomeProperties.cs

@@ -0,0 +1,32 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+#nullable disable
+
+using System.Runtime.CompilerServices;
+using System.Text.Json;
+using Azure.Core;
+
+namespace Inheritance.Models
+{
+    /// <summary>
+    /// The SomeProperties class.
+    /// </summary>
+    [CodeGenSerialization(nameof(SomeProperty), SerializationValueHook = nameof(SerializationMethodHook))]
+    public partial class SomeProperties : IUtf8JsonSerializable
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal void SerializationMethodHook(Utf8JsonWriter writer)
+        {
+            writer.WriteStringValue("OverloadSucceeded");
+        }
+
+        /// <summary>
+        /// Forwards call
+        /// </summary>
+        /// <param name="writer"></param>
+        #pragma warning disable AZC0014 // Types from certain namespaces should not be exposed as part of public API surface.
+        public void CallWrite(Utf8JsonWriter writer) => ((IUtf8JsonSerializable)this).Write(writer);
+        #pragma warning restore AZC0014 // Types from certain namespaces should not be exposed as part of public API surface.
+    }
+}

test/TestProjects/Inheritance/Generated/Models/ClassThatInheritsFromBaseClassAndSomePropertiesWithBaseClassOverride.Serialization.cs

@@ -82,7 +82,7 @@ void IUtf8JsonSerializable.Write(Utf8JsonWriter writer)
             if (Optional.IsDefined(SomeProperty))
             {
                 writer.WritePropertyName("SomeProperty"u8);
-                writer.WriteStringValue(SomeProperty);
+                SerializationMethodHook(writer);
             }
             if (Optional.IsDefined(SomeOtherProperty))
             {

test/TestProjects/Inheritance/Generated/Models/ClassThatInheritsFromSomePropertiesAndBaseClass.Serialization.cs

@@ -82,7 +82,7 @@ void IUtf8JsonSerializable.Write(Utf8JsonWriter writer)
             if (Optional.IsDefined(SomeProperty))
             {
                 writer.WritePropertyName("SomeProperty"u8);
-                writer.WriteStringValue(SomeProperty);
+                SerializationMethodHook(writer);
             }
             if (Optional.IsDefined(SomeOtherProperty))
             {

test/TestProjects/Inheritance/Generated/Models/ClassThatInheritsFromSomePropertiesAndBaseClassAndRedefinesAProperty.Serialization.cs

@@ -82,7 +82,7 @@ void IUtf8JsonSerializable.Write(Utf8JsonWriter writer)
             if (Optional.IsDefined(SomeProperty))
             {
                 writer.WritePropertyName("SomeProperty"u8);
-                writer.WriteStringValue(SomeProperty);
+                SerializationMethodHook(writer);
             }
             if (Optional.IsDefined(SomeOtherProperty))
             {

test/TestProjects/Inheritance/Generated/Models/SomeProperties.Serialization.cs

@@ -19,7 +19,7 @@ void IUtf8JsonSerializable.Write(Utf8JsonWriter writer)
             if (Optional.IsDefined(SomeProperty))
             {
                 writer.WritePropertyName("SomeProperty"u8);
-                writer.WriteStringValue(SomeProperty);
+                SerializationMethodHook(writer);
             }
             if (Optional.IsDefined(SomeOtherProperty))
             {

test/TestProjects/MgmtCustomizations/src/Customization/Dog.cs

@@ -3,6 +3,7 @@
 
 #nullable disable
 
+using System.ClientModel.Primitives;
 using System.Runtime.CompilerServices;
 using System.Text.Json;
 using Azure.Core;
@@ -20,7 +21,7 @@ public partial class Dog : Pet
         public Pet Friend { get; set; }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private void SerializeBarkProperty(Utf8JsonWriter writer)
+        private void SerializeBarkProperty(Utf8JsonWriter writer, ModelReaderWriterOptions options)
         {
             writer.WriteStringValue(Bark.ToUpperInvariant());
         }

test/TestProjects/MgmtCustomizations/src/Customization/Pet.cs

@@ -4,6 +4,7 @@
 #nullable disable
 
 using System;
+using System.ClientModel.Primitives;
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
 using System.Text.Json;
@@ -30,7 +31,7 @@ public abstract partial class Pet
         public IDictionary<string, string> Tags { get; set; }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal void SerializeSizeProperty(Utf8JsonWriter writer)
+        internal void SerializeSizeProperty(Utf8JsonWriter writer, ModelReaderWriterOptions options)
         {
             writer.WriteStringValue(Size.ToString());
         }
@@ -49,13 +50,13 @@ internal static void DeserializeSizeProperty(JsonProperty property, ref int size
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal void SerializeDateOfBirthProperty(Utf8JsonWriter writer)
+        internal void SerializeDateOfBirthProperty(Utf8JsonWriter writer, ModelReaderWriterOptions options)
         {
             writer.WriteStringValue(DateOfBirth.Value, "yyyy-MM-dd HH:mm");
         }
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal void SerializeColorProperty(Utf8JsonWriter writer)
+        internal void SerializeColorProperty(Utf8JsonWriter writer, ModelReaderWriterOptions options)
         {
             writer.WriteStringValue(Color.ToString());
         }

test/TestProjects/MgmtCustomizations/src/Customization/PetStoreData.cs

@@ -3,6 +3,7 @@
 
 #nullable disable
 
+using System.ClientModel.Primitives;
 using System.Runtime.CompilerServices;
 using System.Text.Json;
 using Azure.Core;
@@ -13,7 +14,7 @@ namespace MgmtCustomizations
     public partial class PetStoreData
     {
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal void WriteId(Utf8JsonWriter writer)
+        internal void WriteId(Utf8JsonWriter writer, ModelReaderWriterOptions options)
         {
             if (Id != null)
                 writer.WriteStringValue(Id);

test/TestProjects/MgmtCustomizations/src/Generated/Models/Cat.Serialization.cs

@@ -49,11 +49,11 @@ void IJsonModel<Cat>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
                 writer.WriteStringValue(Name);
             }
             writer.WritePropertyName("size"u8);
-            SerializeSizeProperty(writer);
+            SerializeSizeProperty(writer, options);
             if (Optional.IsDefined(DateOfBirth))
             {
                 writer.WritePropertyName("dateOfBirth"u8);
-                SerializeDateOfBirthProperty(writer);
+                SerializeDateOfBirthProperty(writer, options);
             }
             if (Optional.IsCollectionDefined(Tags))
             {
@@ -71,7 +71,7 @@ void IJsonModel<Cat>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
             if (Optional.IsDefined(Color))
             {
                 writer.WritePropertyName("color"u8);
-                SerializeColorProperty(writer);
+                SerializeColorProperty(writer, options);
             }
             writer.WriteEndObject();
             if (options.Format != "W" && _serializedAdditionalRawData != null)

test/TestProjects/MgmtCustomizations/src/Generated/Models/Dog.Serialization.cs

@@ -39,11 +39,11 @@ void IJsonModel<Dog>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
                 writer.WriteStringValue(Name);
             }
             writer.WritePropertyName("size"u8);
-            SerializeSizeProperty(writer);
+            SerializeSizeProperty(writer, options);
             if (Optional.IsDefined(DateOfBirth))
             {
                 writer.WritePropertyName("dateOfBirth"u8);
-                SerializeDateOfBirthProperty(writer);
+                SerializeDateOfBirthProperty(writer, options);
             }
             if (Optional.IsCollectionDefined(Tags))
             {
@@ -61,14 +61,14 @@ void IJsonModel<Dog>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
             if (Optional.IsDefined(Color))
             {
                 writer.WritePropertyName("color"u8);
-                SerializeColorProperty(writer);
+                SerializeColorProperty(writer, options);
             }
             writer.WritePropertyName("dog"u8);
             writer.WriteStartObject();
             if (Optional.IsDefined(Bark))
             {
                 writer.WritePropertyName("bark"u8);
-                SerializeBarkProperty(writer);
+                SerializeBarkProperty(writer, options);
             }
             if (Optional.IsDefined(Friend))
             {

test/TestProjects/MgmtCustomizations/src/Generated/Models/Pet.Serialization.cs

@@ -34,11 +34,11 @@ void IJsonModel<Pet>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
                 writer.WriteStringValue(Name);
             }
             writer.WritePropertyName("size"u8);
-            SerializeSizeProperty(writer);
+            SerializeSizeProperty(writer, options);
             if (Optional.IsDefined(DateOfBirth))
             {
                 writer.WritePropertyName("dateOfBirth"u8);
-                SerializeDateOfBirthProperty(writer);
+                SerializeDateOfBirthProperty(writer, options);
             }
             if (Optional.IsCollectionDefined(Tags))
             {
@@ -56,7 +56,7 @@ void IJsonModel<Pet>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
             if (Optional.IsDefined(Color))
             {
                 writer.WritePropertyName("color"u8);
-                SerializeColorProperty(writer);
+                SerializeColorProperty(writer, options);
             }
             writer.WriteEndObject();
             if (options.Format != "W" && _serializedAdditionalRawData != null)

test/TestProjects/MgmtCustomizations/src/Generated/Models/UnknownPet.Serialization.cs

@@ -34,11 +34,11 @@ void IJsonModel<Pet>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
                 writer.WriteStringValue(Name);
             }
             writer.WritePropertyName("size"u8);
-            SerializeSizeProperty(writer);
+            SerializeSizeProperty(writer, options);
             if (Optional.IsDefined(DateOfBirth))
             {
                 writer.WritePropertyName("dateOfBirth"u8);
-                SerializeDateOfBirthProperty(writer);
+                SerializeDateOfBirthProperty(writer, options);
             }
             if (Optional.IsCollectionDefined(Tags))
             {
@@ -56,7 +56,7 @@ void IJsonModel<Pet>.Write(Utf8JsonWriter writer, ModelReaderWriterOptions optio
             if (Optional.IsDefined(Color))
             {
                 writer.WritePropertyName("color"u8);
-                SerializeColorProperty(writer);
+                SerializeColorProperty(writer, options);
             }
             writer.WriteEndObject();
             if (options.Format != "W" && _serializedAdditionalRawData != null)

test/UnbrandedProjects.Tests/CustomizedUnbrandedTests.cs

@@ -2,11 +2,14 @@
 // Licensed under the MIT License.
 
 using CustomizedTypeSpec.Models;
+using Inheritance.Models;
 using NUnit.Framework;
 using System;
 using System.ClientModel.Primitives;
 using System.Collections.Generic;
-using System.Linq;
+using System.IO;
+using System.Text.Json;
+using System.Text;
 
 namespace CustomizedTypeSpec.Tests
 {
@@ -67,5 +70,41 @@ public void VerifyCodeGenSuppress()
             var constructor1 = t.GetConstructor(parameterTypes1);
             Assert.Null(constructor1);
         }
+
+        [Test]
+        public void VerifyCodeGenSerializationMethodHookWithMRW()
+        {
+            SuperRoundTripModel model = new SuperRoundTripModel
+            (
+                "requiredSuperString",
+                1
+            );
+
+            BinaryData binaryData = ModelReaderWriter.Write(model);
+            string jsonString = binaryData.ToString();
+            Assert.IsTrue(jsonString.Contains("7"));
+            Assert.IsFalse(jsonString.Contains("1"));
+        }
+
+        [Test]
+        public void VerifyCodeGenSerializationMethodHookWithoutMRW()
+        {
+            SomeProperties model = new SomeProperties();
+            model.SomeProperty = "SomeProperty";
+            model.SomeOtherProperty = "SomeOtherProperty";
+
+            // Create a MemoryStream to hold the JSON data
+            using var stream = new MemoryStream();
+            using (var writer = new Utf8JsonWriter(stream))
+            {
+                // Call the Write method
+                model.CallWrite(writer);
+            }
+
+            // Get the JSON string
+            string jsonString = Encoding.UTF8.GetString(stream.ToArray());
+            Assert.IsTrue(jsonString.Contains("{\"SomeProperty\":\"OverloadSucceeded\""));
+            Assert.IsFalse(jsonString.Contains("{\"SomeProperty\":\"SomeProperty\""));
+        }
     }
 }