JSON deserialization control?

Question

JSON

How to manage deserialization?
There is a class

[DataContract]
class A
{
  [DataMember]
  public Int32 P1 { get; private set; }
  [DataMember]
  public String P2 { get; private set; }
}

json

{
  "serializable": true, // этого поля нет в классе
  "P1": 1,
  "P2": "ffda"
}

How to deserialize objects only with "serializable": true and set false to null or do something else (take a new one)?
How to deserialize derivatives of A with additional members?
PS, Each object is in a separate file

Answer 1

Something like this:

using Newtonsoft.Json;
using System;
using System.Collections.Generic;

namespace ConsoleApplication11
{
    class Test
    {
        public string P1 { get; set; }
        public int P2 { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {
            var str = JsonConvert.SerializeObject(new List<object> {
                new { s = true, P1 = "one", P2 = 12 },
                new { s = false, P1 = "two", P2 = 13 },
                new { s = true, P1 = "three", P2 = 14 } });

            dynamic dObject = JsonConvert.DeserializeObject(str);

            var list = new List<Test>();

            foreach (var item in dObject)
            {
                if (item.s == true)
                {
                    list.Add(item.ToObject<Test>());
                }
                else
                {
                    Console.WriteLine("No way");
                }
            }

            Console.ReadKey();
        }
    }
}

Although if you need to filter before translation into the object model, then this will have to be done manually.

Answer 2

1) write your own implementation of the deserializer; or write a class with one serializable field, get the result from it and then decide what to do
2) just like the base one