private object ReadJsonAsResourceObject(ForkableJsonReader reader, Type objectType, JsonSerializer serializer)
{
// if the value has been explicitly set to null then the value of the element is simply null
if (reader.TokenType == JsonToken.Null)
{
return(null);
}
var serializationData = SerializationData.GetSerializationData(reader);
var jsonApiContractResolver = (JsonApiContractResolver)serializer.ContractResolver;
var reference = ReaderUtil.ReadAheadToIdentifyObject(reader);
if (serializationData.Included.TryGetValue(reference, out object resourceObject))
{
if (resourceObject is JObject resoruceObjectJObject)
{
// sometimes the value in the reference resolver is a JObject. This occurs when we
// did not know what type it should be when we first read it (i.e. included was processed
// before the item). In these cases we now know what type it should be so will read it
// as such
var resourceObjectReader = new ForkableJsonReader(resoruceObjectJObject.CreateReader(), reader.SerializationDataToken);
resourceObjectReader.Read(); //JObject readers begin at Not Started
resourceObject = jsonApiContractResolver.ResourceObjectConverter.ReadJson(
resourceObjectReader,
objectType,
null,
serializer);
}
//push the reader to the end, we dont need anything else out of the reference
ReaderUtil.ReadUntilEnd(reader, reader.Path);
}
else
{
var contract = (JsonObjectContract)jsonApiContractResolver.ResolveContract(objectType);
resourceObject = ReaderUtil.CreateObject(serializationData, objectType, reference.Type, serializer);
// for placeholders we will just read the top level properties
// it is unlikely to have attributes/relationships present
foreach (var propName in ReaderUtil.IterateProperties(reader))
{
var successfullyPopulateProperty = ReaderUtil.TryPopulateProperty(
serializer,
resourceObject,
contract.Properties.GetClosestMatchProperty(propName),
reader);
}
serializationData.Included[reference] = resourceObject;
}
if (!TypeInfoShim.IsInstanceOf(objectType.GetTypeInfo(), resourceObject))
{
throw new JsonSerializationException($"Unable to assign object '{resourceObject}' to type '{objectType}' at path {reader.FullPath}");
}
return(resourceObject);
}
