public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
{
if (reader.TokenType == JsonToken.Null)
{
return(Variant.FromObject(null));
}
if (reader.TokenType != JsonToken.StartArray)
{
throw new Exception("Invalid JSON for Variant type");
}
var codeValue = reader.ReadAsInt32();
Debug.Assert(codeValue != null, "codeValue != null");
var typeCode = (TypeEnum)(byte)codeValue;
TypeEnum subTypeCode = TypeEnum.None;
if (typeCode == TypeEnum.Array)
{
var subTypeCodeValue = reader.ReadAsInt32();
Debug.Assert(subTypeCodeValue != null, "subTypeCodeValue != null");
subTypeCode = (TypeEnum)(byte)subTypeCodeValue;
if (subTypeCode == TypeEnum.FixedBinary)
{
throw new NotImplementedException("Need special handling of fixed binary values");
}
}
if (typeCode == TypeEnum.FixedBinary)
{
//var size = reader.ReadAsInt32();
throw new NotImplementedException("Need special handling of fixed binary values");
}
object obj;
if (typeCode == TypeEnum.Object)
{
var objectTypeCodeValue = reader.ReadAsInt32();
Debug.Assert(objectTypeCodeValue != null, "objectTypeCodeValue != null");
var objectTypeCode = (byte)objectTypeCodeValue;
var type = KnownTypeAttribute.GetType(objectTypeCode);
if (!reader.Read())
{
throw new Exception("Cannot read JSON");
}
obj = serializer.Deserialize(reader, type);
}
else if (typeCode != TypeEnum.None)
{
if (!reader.Read())
{
throw new Exception("Cannot read JSON");
}
var type = VariantHelper.GetType(typeCode, subTypeCode);
obj = serializer.Deserialize(reader, type);
}
else
{
obj = Variant.Create(null);
}
if (!reader.Read())
{
throw new Exception("Cannot read JSON");
}
Trace.Assert(reader.TokenType == JsonToken.EndArray);
return(Variant.FromObject(obj));
}