JDev 11g ADF Tree question on programmatically expand and select node

Question

I have two questions:
1. I'm trying to automatically expand the first level tree nodes upon display of the tree. I tried to initialize a RowKeySetImpl object, and added ArrayList of first level nodes, and used setDisclosedRowKeys method. The tree nodes are not rendered properly. If I take the following code out, then the tree content is rendered properly. Here is my code. I have three nodes that I want to expand.
ArrayList node1 = new ArrayList();
node1.add(new Integer(0));
ArrayList node2 = new ArrayList();
node2.add(new Integer(1));
ArrayList node3 = new ArrayList();
node3.add(new Integer(2));
RowKeySetImpl expand = new RowKeySetImpl();
expand.add(node1);
expand.add(node2);
expand.add(node3);
this.mainTree.setDisclosedRowKeys(expand);
2. I have a Panel Splitter, on the first facet, it contains a tree, on the second facet it will be either 'task list', or 'edit task'. When user selects a task in the 'task list', I would like to display 'edit task', while highlight the selected 'task' node on the tree.
In respond to the ActionListener of the command link (each command link corresponds to task):
1. How do I determine the properly node in the tree?
2. I constructed a RowKeySetImpl object and called setSelectedRowKeys. But I get messagebox saying "To display the webpage again, Internet Explorer needs to resend the information you've previously submitted." If I clicked Retry button, the message box just gets displayed again. If I cancel, the node I hardcoded does get selected properly.
Please help me!
Thanks,

Answer 1

I believe this has already been fixed in our main code branch. I will enter a boxer bug and make sure that the fix gets backported to boxer so that it is available in the next boxer patch. If I remember correctly, the issue had to do with trees with a large display area (with default fetchSize of 25). The issue is that the tree has to make multiple round trips to the server in order fill the visible area (view port) on the page.
Do either of the following workarounds work:
1) Set a fetchSize attribute on the af:tree tag larger than 25 (<af:tree fetchSize="75">). You may want to increase the rangeSize in your pageDef file as well so that the model rangeSize matches the view fetchSize.
2) Shrink the size of the tree on the page so that it does not have to make multiple round trips to the server to fill it's view port.