Show two trees with same context structure

Question

Hi,
I'm having problems showing two trees using the same context structure but different data simultaneously.
Here is my context structure:
tree (value node)
- expanded (boolean)
- label (string)
- leaf (boolean)
- recursion (recursion node with ref on tree)
I fill the first two layers of this tree in wdDoInit, the rest is loaded dynamically triggered by the onLoadChildren event.
This setting works fine for one tree. But I have the requirement to set up a second tree using the context structure of the first tree with different data. The problem is both should be shown simultaneously.
What I expected to work is:
1. to wrap the above mentioned structure into a container
2. make the tree a prototype (singleton=false) and
3. instantiate two tree nodes
4. fill both nodes with data
5. bind each with its corresponding ui elements manually
So the "shared" context structure would be:
treeContainer (value node)
- tree (value node, singleton=false)
-- expanded (boolean)
-- label (string)
-- leaf (boolean)
-- recursion (recursion node with ref on tree)
My data mapping code begins with these lines
ITreeContainerElement treeContainerElement =
treeContainerNode.createTreeContainerElement();
treeContainerNode.addElement(treeContainerElement);
ITreeNode treeFactory = wdContext.nodeTree();
which is then called one time for each tree. What happens is that both trees show the aggregated data, so each tree shows the data for both trees. When I use the factory of the element instead
ITreeContainerElement treeContainerElement =
treeContainerNode.createTreeContainerElement();
treeContainerNode.addElement(treeContainerElement);
ITreeNode treeFactory = treeContainerElement.nodeTree();
both trees show the data for the first tree.
I am aware that when I copy the context tree to a different location and rename every value node, e.h. tree2, recursion2 that this will work. But the problem is that the two trees will interact together, e.g. copy branches, and I want to use the typed API since the tree will get quite complex and they have absolutely the same structure.
I guess I'm getting sth. terribly wrong here with my understanding of the context, so any help is appreciated.
Best regards,
Fabian

Answer 1

Hi,
It seems to be that my understanding of the context was terribly wrong. After I traced the behaviour in the debugger I realized that I made one important fault. The datasource of the UI elements should have been bound to the first and second instance of the recursion node container. Therefore the parent node should not be singleton since I access two instances simultaneously.
However, I now separated both trees in the context for the sake of maintainability. I work now with the generic API In order to reuse the functionality.
To determine the correct container I introduced the convention that the tree value node should only contain the recursion node. Then I use the following code to determine the right container:
     private IWDNode getContainer(IWDNodeElement parentElement) {
          IWDNode parentContainer = parentElement.node();
          IWDNodeInfo parentContainerInfo = parentContainer.getNodeInfo();
          boolean isRecursive = parentContainerInfo.isRecursive();
          String childName = null;
          if (isRecursive)
               childName = parentContainerInfo.getName();
          else {
               IWDNodeInfo recursiveNodeInfo =
                    (IWDNodeInfo) parentContainer
                         .getNodeInfo()
                         .iterateChildren()
                         .next();
               childName = recursiveNodeInfo.getName();
          return parentContainer.getChildNode(childName, parentElement.index());
I'm sorry if my question was somehow imprecise and lead into the wrong direction. With the code now working I reckon the question as answered and give you both points for good answers!
Best regards,
Fabian