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using Newtonsoft.Json;
using Newtonsoft.Json.Linq;
using System;
public class CustomStringConverter<T> : JsonConverter<T> where T : class
{
public override T? ReadJson(JsonReader reader, Type objectType, T? existingValue, bool hasExistingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.String && reader.Value is string str)
{
return Activator.CreateInstance(typeof(T), str) as T;
}
else if (reader.TokenType == JsonToken.Null)
{
return null;
}
throw new JsonSerializationException($"Unexpected token type '{reader.TokenType}' while deserializing '{objectType.Name}'.");
}
public override void WriteJson(JsonWriter writer, T? value, JsonSerializer serializer)
{
if (value is null)
{
writer.WriteNull();
}
else if (value is Uri u)
{
writer.WriteValue(u.AbsoluteUri);
}
else if (value is T t)
{
writer.WriteValue(t.ToString());
}
else
{
throw new ArgumentException($"{nameof(value)} must be of type {nameof(T)}.");
}
}
}
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