How to make visible context menu for nodes of the given level of treeTable?

Question

Hello
I'm using JDeveloper 11g 10.1.1.4
I have a TreeTable component with 4 different levels (Contry-Branch-Town-Object).
I need to show custom elements of the context menu (right click of the muse) only for rows with "Object".
Now, I'm doing it with the aid of property "visible":
            <af:commandMenuItem text="Open" id="cmi1" immediate="true"
                                visible="#{backingBeanScope.mbMObjectsRegistry.MObjectNode}"
                                actionListener="#{backingBeanScope.mbMObjectsRegistry.btOpenMObject}"/>
    public boolean isMObjectNode() {
        Object oldRowKey = treeTableMObjectsRegistry.getRowKey();
        try {
            AppViewRowImpl row =
                BindingUtils.getSelectedRowTreeTable(treeTableMObjectsRegistry);
            if (row == null || !isMOBjectRow(row)) {
                return false;
            return isMOBjectRow(row);
        } finally {
            treeTableMObjectsRegistry.setRowKey(oldRowKey);
    private boolean isMOBjectRow(AppViewRowImpl row) {
        return (row != null) && (row instanceof MObjectsRegisterMORowImpl);
    }That works, but the problem is that it works a little bit slow, particulary if I have 5 or more menu items.
Each menu item calls the metod isMObjectNode() 3 times per one opening of the menu.
The question is: maybe, there is a method to calculate level of the selected node? Or, there is other variant?
Anatolii

Answer 1

You can use the following sample to develop your usecase.
Here, we would show menu items only for the nodes at level 3.
You can also download the entire sample based on POJO at
http://adfsampleapplications.googlecode.com/svn/trunk/TreeSampleApplication.zip
The code is self explanatory.
Let know, if you have any specific questions.
<af:form id="f1">
<af:treeTable value="#{bindings.continents.treeModel}" var="node"
selectionListener="#{bindings.continents.treeModel.makeCurrent}"
rowSelection="single" id="tt1" columnStretching="last">
<f:facet name="nodeStamp">
<af:column id="c1">
<af:outputText value="#{node}" id="ot2"/>
</af:column>
</f:facet>
<f:facet name="pathStamp">
<af:outputText value="#{node}" id="ot1"/>
</f:facet>
*<f:facet name="contextMenu">*
*<af:popup id="p1" contentDelivery="lazyUncached">*
*<af:setPropertyListener from="#{bindings.continents.treeModel.depth}"*
*to="#{pageFlowScope.CurrentDepth}"*
*type="popupFetch"/>*
*<af:menu text="menu 1" id="m2">*
*<af:commandMenuItem text="View Districts" id="cmi1"*
*visible="#{pageFlowScope.CurrentDepth == 2 ? true : false}"/>*
*<af:commandMenuItem text="View Attractions" id="cmi2"*
*visible="#{pageFlowScope.CurrentDepth == 2 ? true : false}"/>*
*</af:menu>*
*</af:popup>*
*</f:facet>*
</af:treeTable>
</af:form>
Thanks,
Navaneeth