public SelectItemsIterator(FacesContext ctx,
    UIComponent parent) 
{
        kids = parent.getChildren().listIterator();
        this.ctx = ctx;
}

Construct an iterator instance for the specified parent component.

Parameters:

ctx - the FacesContext for the current request

parent - The parent UIComponent whose children will be processed

 public boolean hasNext() 
{
        if (items != null) {
            if (items.hasNext()) {
                return (true);
            } else {
                items = null;
            }
        }
        Object next = findNextValidChild();
        while (next != null) {
            initializeItems(next);
            if (items != null) {
                return true;
            } else {
                next = findNextValidChild();
            }
        }
        return false;
}

Return true if the iteration has more elements.

 public SelectItem next() 
{
        if (!hasNext()) {
            throw new NoSuchElementException();
        }
        if (items != null) {
            return (items.next());
        }
        return next();
}

Return the next element in the iteration.

 public  void remove() 
{
        throw new UnsupportedOperationException();
}

Throw UnsupportedOperationException.