10g: reset sortcriteria on table when page is opened

Question

I have a master page and a detail page, and in the detail page the user is allowed to sort the table. When in the master page a new master is chosen the data for the detail page is changed, and sometimes the column that was sorted by is not even shown anymore (because the values will be empty for this particular master), but the table is still sorted according to the user's choice, and the sorting now looks random.
I want to remove the sorting criteria, and sort according to the order by clause that was specified in the view object, and I want to do this when the page is opened.
How?
Wendy

Answer 1

I was able to control sorting criteria in one of my apps by adding the following to the beforePhase() method override in a PhaseListener that I added to the app via the faces-config.xml file:
            if (arg0.getPhaseId() == PhaseId.INVOKE_APPLICATION) {
                //  set default sort to priority column on af:table.
                String lCurrentPage = FacesContext.getCurrentInstance().getViewRoot().getViewId();
                if ("/app/mypage.jsp".equals(lCurrentPage)) {
                    CoreTable myTable = (CoreTable)EL.get("#{MyBackingBean.MyTable}");
                    List<SortCriterion> lDefaultSortList = new ArrayList<SortCriterion>();
                    lDefaultSortList.add(new SortCriterion("MyVOAttrName", true));
                    myTable .setSortCriteria(lDefaultSortList);
            }It's not EXACTLY what you are looking for, but studying it might get you closer to where you want to be.