static List GetEventCategoryList()

in DiagManager/DiagClasses/DiagFactory.cs [254:325]
59 lines of code
8 McCabe index (conditional complexity)

        static List<DiagCategory>  GetEventCategoryList (string XmlFile, string CatClause, string EventClause, EventType evtType)
        {
            List<DiagCategory> catList = new List<DiagCategory>();

            XPathDocument traceDoc = new XPathDocument(XmlFile); //new XPathDocument("TraceEvents.xml");
            XPathNavigator rootnav = traceDoc.CreateNavigator();

            
            XPathNodeIterator iter = rootnav.Select(CatClause); //rootnav.Select("TraceEvents/EventType");
            while (iter.MoveNext())
            {
                string catname = iter.Current.GetAttribute("name", "");
                DiagCategory cat = new DiagCategory(iter.Current.Name, catname);
                catList.Add(cat);
                PopulateTemplateFeatureVersion(iter, cat);

           

                XPathNodeIterator iterEvents = iter.Current.Select(EventClause);  // iter.Current.Select("Event");
                while (iterEvents.MoveNext())
                {
                    string evtname = iterEvents.Current.GetAttribute("name", "");

                    DiagItem evt = null; //set to NULL because it will create child event for each type

                    if (evtType == EventType.TraceEvent)
                    {
                        string trcid = iterEvents.Current.GetAttribute("id", "");
                        TraceEvent trcevt = new TraceEvent(cat, iterEvents.Current.Name, evtname, trcid);
                        evt = trcevt;
                    }
                    else if (evtType == EventType.Perfmon)
                    {
                        evt = new DiagItem(cat, iterEvents.Current.Name, evtname);
                    }
                    else if (evtType == EventType.XEvent)
                    {
                        string evtpackage = iterEvents.Current.GetAttribute("package", "");
                        evt = new Xevent(cat, iterEvents.Current.Name, evtname, evtpackage);
                        //read field elements from eventfields section
                        XPathNodeIterator iterEventFields = iterEvents.Current.Select("eventfields/field");
                        while (iterEventFields.MoveNext())
                        {
                            string name = iterEventFields.Current.GetAttribute("name", "");
                            bool autoinclude = Convert.ToBoolean(iterEventFields.Current.GetAttribute("AutoInclude", ""));
                            bool isnum = Convert.ToBoolean(iterEventFields.Current.GetAttribute("IsNum", ""));
                            EventField evtField = new EventField(name, autoinclude, isnum);
                            (evt as Xevent).EventFieldList.Add(evtField);
                        }
                        //read action elements from eventactions section
                        XPathNodeIterator iterEventActions = iterEvents.Current.Select("eventactions/action");
                        while (iterEventActions.MoveNext())
                        {
                            string package = iterEventActions.Current.GetAttribute("package", "");
                            string name = iterEventActions.Current.GetAttribute("name", "");
                            EventAction evtAction = new EventAction(package, name);
                            (evt as Xevent).EventActionList.Add(evtAction);
                        }
                    }
                    else
                    {
                        throw new ArgumentException("GetEventCategoryList doesn't know how to handle this type of event yet");
                    }

                    PopulateTemplateFeatureVersion(iterEvents, evt);
                    cat.DiagEventList.Add(evt);
                }
            }

            return catList;

        }