protected override Expression LookupSubscribable(string id, Type elementType)
{
if (!TryGetObservableExpression(id, out Expression result, out bool isDefinition))
{
return(null);
}
if (!isDefinition)
{
if (result.NodeType == ExpressionType.Constant)
{
var c = (ConstantExpression)result;
if (c.Value is IDelegationTarget dt)
{
var ret = QueryEngineBinder.ToSubscribable(id, result, elementType);
targetMapper[ret] = dt;
return(ret);
}
}
}
return(null);
}
public Visitor(string uriPrefix, IQueryEngineRegistry registry)
{
_uriPrefix = uriPrefix;
_binder = new FullBinder(registry);
_edges = new List <EdgeDescription>();
}