Java Code Examples for com.google.web.bindery.event.shared.HandlerRegistration#removeHandler()

/**
 * Removes a field from the validation group.
 *
 * @param <T>   the generic type
 * @param field the field
 * @return true, if successful
 */
public <T extends Widget & HasValidators<?>> boolean remove(final T field) {
    fields.remove(field);
    HandlerRegistration reg = registrations.remove(field);
    if (reg != null) {
        reg.removeHandler();
        return true;
    }
    return false;
}
 

@Override
public void removeHandler() {
	for (HandlerRegistration handler : this.handlers) {
		handler.removeHandler();
	}
	this.handlers.clear();
}
 

/**
 * Register a serializer/deserializer of the given type.
 *
 * @param serdes    The serializer/deserializer of T.
 * @param <T>       The type of the object to be serialized/deserialized.
 *
 * @return  The {@link HandlerRegistration} object, capable of cancelling this HandlerRegistration
 *          to the {@link SerdesManagerImpl}.
 */
public <T> HandlerRegistration register(Serdes<T> serdes) {
    final HandlerRegistration desReg = register((Deserializer<T>) serdes);
    final HandlerRegistration serReg = register((Serializer<T>) serdes);

    return new HandlerRegistration() {
        @Override
        public void removeHandler() {
            desReg.removeHandler();
            serReg.removeHandler();
        }
    };
}
 

@Override
public final HandlerRegistration bindEventHandlers(T target, EventBus eventBus) {
  final List<HandlerRegistration> registrations = doBindEventHandlers(target, eventBus);
  return new HandlerRegistration() {
    @Override
    public void removeHandler() {
      for (HandlerRegistration registration : registrations) {
        registration.removeHandler();
      }
      registrations.clear();
    }
  };
}
 

public void testEventBinder_unbindEventHandlers() {
  EventBus eventBus = new SimpleEventBus();
  TestPresenter presenter = new TestPresenter();
  TestPresenter.MyEventBinder binder = GWT.create(TestPresenter.MyEventBinder.class);
  HandlerRegistration registration = binder.bindEventHandlers(presenter, eventBus);
  assertEquals(0, presenter.firstEventsHandled);
  assertEquals(0, presenter.firstEventsWithoutParameterHandled);
  assertEquals(0, presenter.secondEventsHandled);

  // Before unregistering
  eventBus.fireEvent(new FirstEvent());
  eventBus.fireEvent(new SecondEvent());
  assertEquals(1, presenter.firstEventsHandled);
  assertEquals(1, presenter.firstEventsWithoutParameterHandled);
  assertEquals(1, presenter.secondEventsHandled);
  assertEquals(2, presenter.firstAndSecondEventsHandled);

  // After unregistering
  registration.removeHandler();
  eventBus.fireEvent(new FirstEvent());
  eventBus.fireEvent(new SecondEvent());
  assertEquals(1, presenter.firstEventsHandled);
  assertEquals(1, presenter.firstEventsWithoutParameterHandled);
  assertEquals(1, presenter.secondEventsHandled);
  assertEquals(2, presenter.firstAndSecondEventsHandled);

  // After re-registering
  binder.bindEventHandlers(presenter, eventBus);
  eventBus.fireEvent(new FirstEvent());
  eventBus.fireEvent(new SecondEvent());
  assertEquals(2, presenter.firstEventsHandled);
  assertEquals(2, presenter.firstEventsWithoutParameterHandled);
  assertEquals(2, presenter.secondEventsHandled);
  assertEquals(4, presenter.firstAndSecondEventsHandled);
}
 

private void cacheRemovalCleanup( final ArrayList<HandlerRegistration> registrations )
{
  for ( final HandlerRegistration registration : registrations )
  {
    registration.removeHandler();
  }
  enableAppCache();
}
 

@Override
protected void onUnbind() {
    super.onUnbind();
    for (HandlerRegistration registration : registrations) {
        registration.removeHandler();
    }
}