PerspectiveConverter.cs

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using System;
using Newtonsoft.Json;
 
namespace AnalyzeRe.JsonConverters
{
    public class PerspectiveConverter : JsonConverter
    {
        public override bool CanConvert(Type objectType) => objectType == typeof(Perspective);
 
        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer) =>
            reader.TokenType == JsonToken.String ? Perspective.FromString((string)reader.Value) :
            reader.TokenType == JsonToken.Null ? (Perspective)null :
            throw new InvalidOperationException("Unhandled case for PerspectiveConverter. " +
                "Unexpected TokenType: " + reader.TokenType);
 
        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            if (value == null)
                writer.WriteNull();
            else if (value is Perspective perspective)
                writer.WriteValue(perspective.ToString());
            else
                throw new InvalidOperationException(
                    "Unhandled case for PerspectiveConverter. Unexpected type: " + value.GetType());
        }
    }
}