using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Runtime.Serialization.Formatters;

using System.IO;

using System.Data;

using System.ComponentModel.DataAnnotations;

using System.Globalization;

using System.Reflection;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

using System.Runtime.Serialization;

​

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

​

//https://stackoverflow.com/questions/77484404/how-to-invoke-jsonconverter-from-inside-other-jsonconverter

​

public class Message

{

    [JsonConverter(typeof(CustomElementJsonConverter))]

    [JsonProperty("data", Required = Required.Always)]

    public Sequence Sequence { get; set; }

}

​

public class Step

{

    public List<ElementData> Elements { get; set; }

}

​

public class Sequence

{

    public List<Step> Steps { get; set; }

}

​

public class CustomElementJsonConverter : JsonConverter<Step>

{

    private static readonly Dictionary<string, JsonConverter> _converters;

    static CustomElementJsonConverter()

    {

       foreach (var elementType in Enum.GetValues(typeof(ElementType)).Cast<ElementType>())

       {

           var elemTypeJsonName = elementType.GetEnumMemberValue().ToLower();

           _converters[elemTypeJsonName] = ElementJsonConverterFactory.Create(elementType);

       }

    }

​

    public override Step ReadJson(JsonReader reader, Type objectType, Step existingValue, bool hasExistingValue, JsonSerializer serializer)

    {

       var jElements = JArray.Load(reader);

​

       var elements = new List<ElementData>();

       foreach (var jElement in jElements)

       {        

           var elementType = jElement["type"].Value<string>().ToLower();       

           var convertor = _converters[elementType];

​

           //HOW TO INVOKE THE CONVERTOR?           

       }

​

       return new Step { Elements = elements };

    }  

}

​

public static class ElementJsonConverterFactory

{

   public static JsonConverter Create(ElementType elementType) => elementType switch

   {

       ElementType.Type1 => new ElementType1JsonConverter(), // FIXED missing comma

       ElementType.Type2 => new ElementType2JsonConverter()

   };

}

​

public class ElementType1JsonConverter : JsonConverter<ElementData>

{

   public override ElementData ReadJson(JsonReader reader, Type objectType, ElementData existingValue, bool hasExistingValue, JsonSerializer serializer)

   {

       // if CommandType == Command1_Type1 should parse and return object ElementData_For_Command1Type1

       // if CommandType == Command2_Type1 should parse and return object ElementData_For_Command2Type1

   }

​

   public override void WriteJson(JsonWriter writer, ElementData value, JsonSerializer serializer)

   {

       throw new NotImplementedException();

   }

}

​

public class ElementType2JsonConverter : JsonConverter<ElementData>

{

   public override ElementData ReadJson(JsonReader reader, Type objectType, ElementData existingValue, bool hasExistingValue, JsonSerializer serializer)

   {

       // if CommandType == Command1_Type2 should parse and return object ElementData_For_Command1Type2

   }

​

   public override void WriteJson(JsonWriter writer, ElementData value, JsonSerializer serializer)

   {

       throw new NotImplementedException();

   }

}

​

public enum ElementType

{

    [EnumMember(Value = "type1")] Type1,

    [EnumMember(Value = "type2")] Type2,

}

​

public class ElementData

{

   [JsonProperty("type", Required = Required.Always)]

   public ElementType ElementType { get; set; }

}

​

public class CommandElementData1 : ElementData

{

   public enum CommandType

   {

      [EnumMember] Command1_Type1,

      [EnumMember] Command2_Type1,

   }

​

   [JsonProperty(Required = Required.Always)]

   public CommandType Command { get; set; }

}

​

public class ElementData_For_Command1Type1 : CommandElementData1

{

   [JsonProperty(Required = Required.Always)]

   public string Prop1 { get; set; }

   [JsonProperty(Required = Required.Always)]

   public string Prop2 { get; set; }

}

​

public class ElementData_For_Command2Type1 : CommandElementData1

{

   [JsonProperty(Required = Required.Always)]

   public string Prop1 { get; set; }

   [JsonProperty(Required = Required.Always)]

   public string Prop2 { get; set; }

}

​

public class CommandElementData2 : ElementData

{

   public enum CommandType

   {

      [EnumMember] Command1_Type2,

   }

​

   [JsonProperty(Required = Required.Always)]

   public CommandType Command { get; set; }

}

​

public class ElementData_For_Command1Type2 : CommandElementData2

{

   [JsonProperty(Required = Required.Always)]

   public int Prop3 { get; set; }      

}

​

    class TestClass

    {

        public static void Test()

        {

        }   

        static string GetJson() =>@"

";

    }

​

    public static partial class JsonExtensions

    {

        public static JsonReader AssertTokenType(this JsonReader reader, JsonToken tokenType) => 

            reader.TokenType == tokenType ? reader : throw new JsonSerializationException(string.Format("Unexpected token {0}, expected {1}", reader.TokenType, tokenType));

        public static JsonReader ReadToContentAndAssert(this JsonReader reader) =>

            reader.ReadAndAssert().MoveToContentAndAssert();

​

        public static JsonReader MoveToContentAndAssert(this JsonReader reader)

        {

            ArgumentNullException.ThrowIfNull(reader);

            if (reader.TokenType == JsonToken.None)       // Skip past beginning of stream.

                reader.ReadAndAssert();

            while (reader.TokenType == JsonToken.Comment) // Skip past comments.

                reader.ReadAndAssert();

            return reader;

        }

​

        public static JsonReader ReadAndAssert(this JsonReader reader)

        {

            ArgumentNullException.ThrowIfNull(reader);

            if (!reader.Read())

                throw new JsonReaderException("Unexpected end of JSON stream.");

            return reader;

        }

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1}), {2}", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version, Environment.OSVersion);

            Console.WriteLine("{0} version: {1}", typeof(JsonSerializer).Namespace, typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​