public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
// Load JObject from stream
JObject jo = JObject.Load(reader);
// Create target object based on JObject
JToken value = null;
jo.TryGetValue("$type", out value);
var type = DerivedClassesRegister.GetTypeFromCode(value.Value <string>());
if (type != null && !objectType.GetTypeInfo().IsAssignableFrom(type))
{
type = null;
}
var target = Activator.CreateInstance(type ?? objectType);
// Populate the object properties
using (JsonReader jObjectReader = CopyReaderForObject(reader, jo))
{
serializer.Populate(jObjectReader, target);
}
return(target);
}
private Type getTransformation(ModelBindingContext bindingContext, out Type fitype, out Type fdtype, out string index)
{
fitype = null; fdtype = null; index = null;
var httpContext = bindingContext.HttpContext;
var tr = httpContext.RequestServices.GetService <RequestTransformationsRegister>();
if (tr == null)
{
return(null);
}
index = tr.GetIndex(bindingContext.ModelName ?? string.Empty);
if (index == null)
{
return(null);
}
if (index.Length > 0 && index[index.Length - 1] == '_')
{
return(DerivedClassesRegister.GetTypeFromCode(index));
}
else
{
return(TransformationsRegister.InverseTransform(bindingContext.ModelMetadata.ModelType, index, out fitype, out fdtype));
}
}