Pass the formatter context to the CreateJsonSerializer. It gives ability to override and create serializer specific to the context (#8358)

* Pass the formatter context to the CreateJsonSerializer so that it gives ability to override and create serializer specific to the context

src/Mvc/Mvc.NewtonsoftJson/ref/Microsoft.AspNetCore.Mvc.NewtonsoftJson.netcoreapp3.0.cs

@@ -25,6 +25,7 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
         public virtual Microsoft.AspNetCore.Mvc.Formatters.InputFormatterExceptionPolicy ExceptionPolicy { get { throw null; } }
         protected Newtonsoft.Json.JsonSerializerSettings SerializerSettings { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
         protected virtual Newtonsoft.Json.JsonSerializer CreateJsonSerializer() { throw null; }
+        protected virtual Newtonsoft.Json.JsonSerializer CreateJsonSerializer(Microsoft.AspNetCore.Mvc.Formatters.InputFormatterContext context) { throw null; }
         [System.Diagnostics.DebuggerStepThroughAttribute]
         public override System.Threading.Tasks.Task<Microsoft.AspNetCore.Mvc.Formatters.InputFormatterResult> ReadRequestBodyAsync(Microsoft.AspNetCore.Mvc.Formatters.InputFormatterContext context, System.Text.Encoding encoding) { throw null; }
         protected virtual void ReleaseJsonSerializer(Newtonsoft.Json.JsonSerializer serializer) { }
@@ -34,6 +35,7 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
         public NewtonsoftJsonOutputFormatter(Newtonsoft.Json.JsonSerializerSettings serializerSettings, System.Buffers.ArrayPool<char> charPool) { }
         protected Newtonsoft.Json.JsonSerializerSettings SerializerSettings { [System.Runtime.CompilerServices.CompilerGeneratedAttribute]get { throw null; } }
         protected virtual Newtonsoft.Json.JsonSerializer CreateJsonSerializer() { throw null; }
+        protected virtual Newtonsoft.Json.JsonSerializer CreateJsonSerializer(Microsoft.AspNetCore.Mvc.Formatters.OutputFormatterWriteContext context) { throw null; }
         protected virtual Newtonsoft.Json.JsonWriter CreateJsonWriter(System.IO.TextWriter writer) { throw null; }
         [System.Diagnostics.DebuggerStepThroughAttribute]
         public override System.Threading.Tasks.Task WriteResponseBodyAsync(Microsoft.AspNetCore.Mvc.Formatters.OutputFormatterWriteContext context, System.Text.Encoding selectedEncoding) { throw null; }

src/Mvc/Mvc.NewtonsoftJson/src/NewtonsoftJsonInputFormatter.cs

@@ -202,7 +202,7 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
                     }
 
                     var type = context.ModelType;
-                    var jsonSerializer = CreateJsonSerializer();
+                    var jsonSerializer = CreateJsonSerializer(context);
                     jsonSerializer.Error += ErrorHandler;
                     object model;
                     try
@@ -244,7 +244,8 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
         }
 
         /// <summary>
-        /// Called during deserialization to get the <see cref="JsonSerializer"/>.
+        /// Called during deserialization to get the <see cref="JsonSerializer"/>. The formatter context
+        /// that is passed gives an ability to create serializer specific to the context. 
         /// </summary>
         /// <returns>The <see cref="JsonSerializer"/> used during deserialization.</returns>
         /// <remarks>
@@ -261,6 +262,21 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
             return _jsonSerializerPool.Get();
         }
 
+        /// <summary>
+        /// Called during deserialization to get the <see cref="JsonSerializer"/>. The formatter context
+        /// that is passed gives an ability to create serializer specific to the context. 
+        /// </summary>
+        /// <param name="context">A context object used by an input formatter for deserializing the request body into an object.</param>
+        /// <returns>The <see cref="JsonSerializer"/> used during deserialization.</returns>
+        /// <remarks>
+        /// This method works in tandem with <see cref="ReleaseJsonSerializer(JsonSerializer)"/> to
+        /// manage the lifetimes of <see cref="JsonSerializer"/> instances.
+        /// </remarks>
+        protected virtual JsonSerializer CreateJsonSerializer(InputFormatterContext context)
+        {
+            return CreateJsonSerializer();
+        }
+
         /// <summary>
         /// Releases the <paramref name="serializer"/> instance.
         /// </summary>

src/Mvc/Mvc.NewtonsoftJson/src/NewtonsoftJsonOutputFormatter.cs

@@ -85,7 +85,8 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
         }
 
         /// <summary>
-        /// Called during serialization to create the <see cref="JsonSerializer"/>.
+        /// Called during serialization to create the <see cref="JsonSerializer"/>.The formatter context
+        /// that is passed gives an ability to create serializer specific to the context. 
         /// </summary>
         /// <returns>The <see cref="JsonSerializer"/> used during serialization and deserialization.</returns>
         protected virtual JsonSerializer CreateJsonSerializer()
@@ -98,6 +99,17 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
             return _serializer;
         }
 
+        /// <summary>
+        /// Called during serialization to create the <see cref="JsonSerializer"/>.The formatter context
+        /// that is passed gives an ability to create serializer specific to the context. 
+        /// </summary>
+        /// <param name="context">A context object for <see cref="IOutputFormatter.WriteAsync(OutputFormatterWriteContext)"/>.</param>
+        /// <returns>The <see cref="JsonSerializer"/> used during serialization and deserialization.</returns>
+        protected virtual JsonSerializer CreateJsonSerializer(OutputFormatterWriteContext context)
+        {
+            return CreateJsonSerializer();
+        }
+
         /// <inheritdoc />
         public override async Task WriteResponseBodyAsync(OutputFormatterWriteContext context, Encoding selectedEncoding)
         {
@@ -123,7 +135,7 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
             {
                 using (var jsonWriter = CreateJsonWriter(writer))
                 {
-                    var jsonSerializer = CreateJsonSerializer();
+                    var jsonSerializer = CreateJsonSerializer(context);
                     jsonSerializer.Serialize(jsonWriter, context.Object);
                 }
 

src/Mvc/Mvc.NewtonsoftJson/test/NewtonsoftJsonInputFormatterTest.cs

@@ -474,7 +474,7 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
             var formatter = new TestableJsonInputFormatter(settings);
 
             // Act
-            var actual = formatter.CreateJsonSerializer();
+            var actual = formatter.CreateJsonSerializer(null);
 
             // Assert
             Assert.Same(settings.ContractResolver, actual.ContractResolver);
@@ -578,7 +578,7 @@ namespace Microsoft.AspNetCore.Mvc.Formatters
 
             public new JsonSerializerSettings SerializerSettings => base.SerializerSettings;
 
-            public new JsonSerializer CreateJsonSerializer() => base.CreateJsonSerializer();
+            public new JsonSerializer CreateJsonSerializer(InputFormatterContext _) => base.CreateJsonSerializer(null);
         }
 
         private static ILogger GetLogger()