public override object?ReadJson(JsonReader reader, Type objectType, object?existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
var jo = JObject.Load(reader);
var designatingProperty = jo.GetValue(TypeDesignatingPropertyName);
TypeInfo typeInfo;
if (designatingProperty == null)
{
if (DefaultType == null)
{
throw new Exception($"Unable to determine type to deserialize. Missing property `{TypeDesignatingPropertyName}`");
}
typeInfo = DefaultType.GetTypeInfo();
}
else
{
var derivedType = designatingProperty.ToObject <string>() ?? string.Empty;
typeInfo = GetTypeInfoFromDerivedType(derivedType);
}
var ctor = typeInfo.GetConstructors(BindingFlags.Public | BindingFlags.Instance).FirstOrDefault();
if (ctor == null)
{
throw new Exception($"Type {typeInfo.Name} must have a public constructor");
}
var args = ctor.GetParameters()
.Select(p =>
jo.GetValue(char.ToUpper(p.Name ![0]) + p.Name.Substring(1))?.ToObject(p.ParameterType, serializer))
