protected virtual void Traverse <TContext>(IObjectDescriptor value, IObjectGraphVisitor <TContext> visitor, int currentDepth, TContext context)
{
if (++currentDepth > _maxRecursion)
{
throw new InvalidOperationException("Too much recursion when traversing the object graph");
}
if (!visitor.Enter(value, context))
{
return;
}
var typeCode = Type.GetTypeCode(value.Type);
switch (typeCode)
{
case TypeCode.Boolean:
case TypeCode.Byte:
case TypeCode.Int16:
case TypeCode.Int32:
case TypeCode.Int64:
case TypeCode.SByte:
case TypeCode.UInt16:
case TypeCode.UInt32:
case TypeCode.UInt64:
case TypeCode.Single:
case TypeCode.Double:
case TypeCode.Decimal:
case TypeCode.String:
case TypeCode.Char:
case TypeCode.DateTime:
visitor.VisitScalar(value, context);
break;
case TypeCode.DBNull:
visitor.VisitScalar(new BetterObjectDescriptor(null, typeof(object), typeof(object)), context);
break;
case TypeCode.Empty:
throw new NotSupportedException(string.Format(CultureInfo.InvariantCulture, "TypeCode.{0} is not supported.", typeCode));
default:
if (value.Value == null || value.Type == typeof(TimeSpan))
{
visitor.VisitScalar(value, context);
break;
}
var underlyingType = Nullable.GetUnderlyingType(value.Type);
if (underlyingType != null)
{
// This is a nullable type, recursively handle it with its underlying type.
// Note that if it contains null, the condition above already took care of it
Traverse(new BetterObjectDescriptor(value.Value, underlyingType, value.Type, value.ScalarStyle), visitor, currentDepth, context);
}
else
{
TraverseObject(value, visitor, currentDepth, context);
}
break;
}
}