Can I set the value of a list binding in my managed bean?

Question

Dear All,
This is just an exercise for me and I just wanted to experiment on the bindings of ADF for me to understand it further.
I wanted to create a custom Model Driven LOV with my data control listed below
Countries
     -CountryId
     -CountryName..but I wanted to display the label similar to this
1 - USA
2 - England
n - France..so I thought of manipulating the select items in a bean
<af:selectOneChoice id="soc1" value="#{bindings.Countries.inputValue}">
  <f:selectItems value="#{pageFlowScope.MyBean.countries}" id="si1" valuePassThru="true"/>
</af:selectOneChoice>..and the code similar to this
public class MyBean{
     public List<SelectItem> getCountries(){
          //countryMap points to accessing the iterator binding
          //BindingsHelper is a utility class that sets the value
          for(...){
               SelectItem item = new SelectItem();
               item.setLabel(countryMap.get("CountryId") + " - " + countryMap.get("CountryName"));
               item.setValue(countryMap.get("CountryId"));
               list.add(item);
          //set the item to the first row
          BindingsHelper.setExpressionValue("#{bindings.Countries.inputValue}",
                                 list.get(0).getValue());
          return list;
}...on the last part I wanted to set the value to the first item but I am encountering numberformatexception when setting the list binding.
I know I can do this declaratively also by removing the unselected item but as I have said I am experimenting on the bindings.
Is this not possible?
Thanks.
JDev 11G PS5

Answer 1

Hi ,
I understand that , you want to show select one choice (dropdown) with label (countyid - country name) and value is (countryid).
and these informnation is coming from ADf Model ( may be a VO).
in the UI page you used this list is coming from MyBean
<af:selectOneChoice id="soc1" value="#{bindings.Countries.inputValue}">
<f:selectItems value="#{pageFlowScope.MyBean.countries}" id="si1" valuePassThru="true"/>
</af:selectOneChoice>
so ,
The Managed Bean code should be ,
private List<SelectItem> countries;
///setter method
public void setCountries(List<SelectItem> countries) {
this.countries= countries;
// getter method
public List<SelectItem> getQuoteStatusList() {
quoteStatusList =
selectItemsForIterator("countriesVOIterator",
"countryId", "countryName");
return quoteStatusList;
public static List<SelectItem> selectItemsForIterator(String iteratorName, String valueAttrName, String displayAttrName) {
return selectItemsForIterator(findIterator(iteratorName), valueAttrName, displayAttrName);
public static DCIteratorBinding findIterator(String name) {
DCIteratorBinding iter = getDCBindingContainer().findIteratorBinding(name);
if (iter == null) {
throw new RuntimeException("Iterator '" + name + "' not found");
return iter;
public static List<SelectItem> selectItemsForIterator(DCIteratorBinding iter, String valueAttrName, String displayAttrName) {
List<SelectItem> selectItems = new ArrayList<SelectItem>();
for (Row r : iter.getAllRowsInRange()) {
string labelValue = (String)r.getAttribute(valueAttrName) +"-"+ (String)r.getAttribute(displayAttrName);
selectItems.add(new SelectItem(r.getAttribute(valueAttrName),labelValue ));
return selectItems;
this will give you what you except in the ui
when you try to get the value form that seclecOneChoice value in MyBean what user selects , you can simply get the value of this selectOneChoice.