Antlr4 StringTemplate not compatible with Json.net dynamic items - json

Question

I would like to read a dynamic object from a json file and then use this in a stringTemplate.
The following code works.
dynamic data = new { bcName = "Lixam B.V", periodName = "July 2013" };
var engine = new Template("<m.bcName> <m.periodName>");
engine.Add("m", data);
engine.Render().Should().Be("Lixam B.V July 2013");
The following code fails
var json = "{bcName : 'Lixam B.V', periodName : 'July 2013'}";
dynamic data = JsonConvert.DeserializeObject(json);
string name = (data.bcName);
name.Should().Be("Lixam B.V"); // this passes
var engine = new Template("<m.bcName> <m.periodName>");
engine.Add("m", data);
engine.Render().Should().Be("Lixam B.V July 2013"); //fails
Is there another way to configure JsonConverter to be compatible with StringTemplate

Answer 1

You need to create an IModelAdaptor for whatever the compiled type representing dynamic is, and register it using TemplateGroup.RegisterModelAdaptor.

Answer 2

Inspired on Mr. Harwell's answer, I've implemented an IModelAdaptor that enable the usage of Newtonsoft.Json parsed objects.
Here it goes:
internal class JTokenModelAdaptor : Antlr4.StringTemplate.IModelAdaptor
{
public object GetProperty(
Antlr4.StringTemplate.Interpreter interpreter,
Antlr4.StringTemplate.TemplateFrame frame,
object obj,
object property,
string propertyName)
{
var token = (obj as JToken)?.SelectToken(propertyName);
if (token == null)
return null;
if (token is JValue)
{
var jval = token as JValue;
return jval.Value;
}
return token;
}
}
You just need to register the adaptor in your template group, like this:
template.Group.RegisterModelAdaptor(typeof(JToken), new JTokenModelAdaptor());