private void init() {
// The AsyncBeanManager API works in both synchronous and asynchronous IOC mode
AsyncBeanManager bm = IOC.getAsyncBeanManager();
// In the case that this method is executed before the first call has successfully processed all
// of its callbacks, we must cancel those uncompleted callbacks in flight to prevent duplicate
// data in the ListWidget.
for (WidgetCreationalCallback callback : callbacks) {
callback.discard();
}
callbacks.clear();
pendingCallbacks = 0;
// clean up the old widgets before we add new ones (this will eventually become a feature of the
// framework: ERRAI-375)
Iterator<Widget> it = panel.iterator();
while (it.hasNext()) {
bm.destroyBean(it.next());
it.remove();
}
if (items == null) return;
pendingCallbacks = items.size();
AsyncBeanDef<W> itemBeanDef = bm.lookupBean(getItemWidgetType());
for (final M item : items) {
final WidgetCreationalCallback callback = new WidgetCreationalCallback(item);
callbacks.add(callback);
itemBeanDef.newInstance(callback);
}
}
private void addWidget(final M m) {
// This call is always synchronous, since the list can only be manipulated after
// onItemsRendered was called. At that point the code of a potential split point must have
// already been downloaded.
AsyncBeanDef<W> itemBeanDef = IOC.getAsyncBeanManager().lookupBean(getItemWidgetType());
itemBeanDef.getInstance(
new CreationalCallback<W>() {
@Override
public void callback(W widget) {
widget.setModel(m);
panel.add(widget);
}
});
}