Get tree selected node onPageLoad

Question

We just turned on change persistence to keep our row selections as we traverse our taskflows and pages.
In one of our pages we have a situation where we have a tree (master) and table (table) whose data is partially based on what is selected in that tree. We use the following logic to determine what is selected in the tree to perform the query on the table.
public static JUCtrlHierNodeBinding getTreeSelectedNode(RichTree tree) {
JUCtrlHierNodeBinding node = null;
if (tree != null) {
Object oldRowKey = tree.getRowKey();
try {
RowKeySet selectedRowKeySet = tree.getSelectedRowKeys();
if (selectedRowKeySet != null) {
for (Object selectedRowKey : selectedRowKeySet) {
tree.setRowKey(selectedRowKey);
node = (JUCtrlHierNodeBinding)tree.getRowData();
break;
} finally {
tree.setRowKey(oldRowKey);
return node;
I hooked up a beforePhase listener on my jspx to call this function and get the (previously - last time user was on this page) selected row and then refresh the table based on the selected tree row's data. This seems to work, but . . . in my log I'm seeing the following error. It seems like for some reason it's trying to convert my Raw UUID to an int, I have no idea why.
<SortableModel> <_toRowIndex> Invalid rowkey:oracle.jbo.Key[B68F305BF7F5496D8A0FF99EE8F97CF0 ] type:class oracle.jbo.Key
<SortableModel> <_toRowIndex>
java.lang.ClassCastException: oracle.jbo.Key cannot be cast to java.lang.Integer
at org.apache.myfaces.trinidad.model.SortableModel._toRowIndex(SortableModel.java:341)
at org.apache.myfaces.trinidad.model.SortableModel.setRowKey(SortableModel.java:137)
at org.apache.myfaces.trinidad.model.ChildPropertyTreeModel._setRowKey(ChildPropertyTreeModel.java:376)
at org.apache.myfaces.trinidad.model.ChildPropertyTreeModel.setRowKey(ChildPropertyTreeModel.java:178)
at org.apache.myfaces.trinidad.component.UIXCollection.setRowKey(UIXCollection.java:425)
at oracle.apps.aia.sr.common.JSFUtils.getTreeSelectedNode(JSFUtils.java:392)
So, I thought that maybe this wasn't the best way to get the selected node. So, after some research I changed the logic to be:
public static JUCtrlHierNodeBinding getTreeSelectedNode(RichTree tree) {
JUCtrlHierNodeBinding node = null;
if (tree != null) {
CollectionModel treeModel = (CollectionModel)tree.getValue();
if (treeModel != null ){
JUCtrlHierBinding treeBinding = (JUCtrlHierBinding)treeModel.getWrappedData();
if (treeBinding != null){
RowKeySet rks = tree.getSelectedRowKeys();
if (rks != null){
if (!rks.isEmpty()){
List firstSet = (List)rks.iterator().next();
node = treeBinding.findNodeByKeyPath(firstSet);
return node;
However, at the time of the beforePhase (I even tried an afterPhase listener) the tree isn't null, but the CollectionModel is null for some reason. I'm not sure where to go from here, any ideas?

Answer 1

Hi,
if you use lazy loading (contentdelivery="lazy" then the data is queried after the tree renders. ou would need to set it to immediate to acess data suring the Preparerender phase).
Frank