Make a preselection in a selectManyChoice element

Question

Hi,
I use JDeveloper 11.1.1.0.2. With my program I want to be able to create activities. If a logged in user is surfing to the createActivity page his username should be preselected in a selectManyChoice list.
Here is my first try, that didn't work.
code in my jspx file
<af:selectManyChoice label="#{bundle.ASSIGNED_TO}"
          value="#{ backing_createActivity.selectedUsers}">
   <f:selectItems value="#{backing_createActivity.listOfUsers}"/>
</af:selectManyChoice>code in my backing_createActivity.java file
Collection<String> selectedUsers;
public CreateActivity() {
        try {
            selectedUsers = new ArrayList();
        } catch (Exception e) {
            System.err.println(e.toString());
public Collection<String> getSelectedUsers() {
  // userId is static for testing
  String userId = "5";
  selectedUsers.add(userId);
  return selectedUsers;
public List<SelectItem> getListOfUsers() {
        BindingContainer bindingContainer = this.getBindings();
        DCIteratorBinding dcIteratorBinding = (DCIteratorBinding)bindingContainer.get("findAllUsersIter");
        Row[] row = dcIteratorBinding.getAllRowsInRange();
        listOfUsers = new ArrayList<SelectItem>(row.length);
        // Add all Users in the multiselect box
        for (int i = 0; i < row.length; i++) {
          BigDecimal userId = (BigDecimal)row.getAttribute("userId");
String username = (String)row[i].getAttribute("userUsername");
listOfUsers.add(new SelectItem(userId.toString(), username));
return listOfUsers;
I get the following warning, when I surf to the createActivity page. And the logged in user is not preselected.
Warning
oracle.adfinternal.view.faces.renderkit.rich.SimpleSelectManyRenderer _getSelectedItems
WARNUNG: Could not find value:5 of type:java.lang.String among list of SelectItems
What am I doing wrong here?
Thanks for any help
Bodhy

Answer 1

Hi,
It should work correctly, can you try to store the selected users in an array? The code will then use a slightly different code branch so the test could help isolate the issue.
~ Simon