public bool SolveOptionalType <T>(ref Optional <T> type, DB.Document doc, DB.ElementTypeGroup group, Func <DB.Document, string, T> recoveryAction, string paramName) where T : DB.ElementType
{
bool wasMissing = type.IsMissing;
if (wasMissing)
{
type = (T)doc.GetElement(doc.GetDefaultElementTypeId(group)) ??
throw new ArgumentException($"No suitable {group} has been found.", paramName);
}
else if (type.Value == null)
{
type = (T)recoveryAction.Invoke(doc, paramName);
}
return(wasMissing);
}
public bool SolveOptionalType <T>(ref Optional <T> type, DB.Document doc, DB.ElementTypeGroup group, string paramName) where T : DB.ElementType
{
return(SolveOptionalType(ref type, doc, group, (document, name) => throw new ArgumentNullException(paramName), paramName));
}