Tree node selection lost after returning from called page

Question

Hi
in a default unbound task flow i have a Page1 calling Page2.
Page1 displays a master-detail data using treetable component, while Page2 displays detail data (selected from Page1) as a read-only form.
When coming back from Page2, Page1 tree node selection is lost and tree table is rendered as if was called for a first time (detail data are disclosed).
How can I restore an original selection?
(Jdev 11.1.2.2)
Many thanx

Answer 1

1. before goind to the Page 2, remember somewhere the selected row keys, as follows:
    RowKeySet rks = yourTreeTable.getSelectedRowKeys();2. after returning to the page 1, do as follows:
    Iterator rksIterator = rks.iterator();
    if (rksIterator.hasNext()) {
             List key = (List)rksIterator.next();
             JUCtrlHierBinding treeTableBinding = null;
             treeTableBinding =
                     (JUCtrlHierBinding)((CollectionModel)table.getValue()).getWrappedData();
             JUCtrlHierNodeBinding node =
                 treeTableBinding.findNodeByKeyPath(key);
             RowKeySet newRks = new RowKeySetImpl();
             if (node != null)
                 newRks.add(node.getKeyPath());
             callSelectionListener(yourTreeTable, newRks);
            // refresh your tree table  - ommited here
     // where is:
     protected void callSelectionListener(RichTreeTable table, RowKeySet discRows) {
         SelectionEvent selEv =
             new SelectionEvent(table, new RowKeySetImpl(), discRows);
         JSFUtils.resloveMethodExpression("bindings.YourVO.treeModel.makeCurrent", // <--  of course, adjust this value to the your selectionListener expression
                                          null,
                                          new Class[] { SelectionEvent.class },
                                          new Object[] { selEv });
     } // of makeCurrent()
    public  Object resloveMethodExpression(String expression, Class returnType, Class[] argTypes, Object[] argValues) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        Application app = facesContext.getApplication();
        ExpressionFactory elFactory = app.getExpressionFactory();
        ELContext elContext = facesContext.getELContext();
        MethodExpression methodExpression = elFactory.createMethodExpression(elContext, expression, returnType, argTypes);
        return methodExpression.invoke(elContext, argValues);
    }