Validation of multiple h:inputText within ui:repeat

Question

Hello everybody,
my JSF application is based on JSF 1.2 and Facelets. I want to validate that at least one of four h:inputText elements rendered by ui:repeat is not empty. Therefore I added a standalone h:inputHidden with a non empty value to ensure that its validator attribute which references a validator method of my backing bean is called. In the validator method I want to go through the h:inputText children of the corresponding ui:repeat component. Unfortunately I haven't found a way to traverse the children of ui:repeat. #getChildren on UIRepeat only retrieves one UIInput instance because of the flyweight pattern I guess. Someone advised me to use #invokeOnComponent but I didn't get this working. Surprisingly calling viewRoot.invokeOnComponent(context, 'uiRepeatClientId:0:inputTextId', contextCallBack) didn't retrieve the first h:inputText instance. Calling viewRoot.invokeOnComponent(context, 'uiRepeatClientId', contextCallBack) found the ui:repeat component.
Any help would be great.
Thanks in advance,
Robert

Answer 1

Finally here is the source code:
public void validate(FacesContext context, UIComponent toValidate, Object value) {
     String uiRepeatClientId = "clientId"
     context.getViewRoot().invokeOnComponent(context, uiRepeatClientId, new ContextCallback() {
          public void invokeContextCallback(FacesContext context, UIComponent target) {
               UIRepeat uiRepeat = (UIRepeat) target;
               // Causes that underlying model to be updated and as a consequence can be validated
               uiRepeat.processUpdates(context);
     // Go on and do validation on the model data
}Kind Regards,
Robert