p:dataTable how to stay in edit mode? - jsf-2

Question

I'm using primefaces 3.5 and watching a strange datatable behavior when editing data.
If I enter wrong data in 'year' field and click on the tick I get a message about mistake.
But if I don't click on the tick and click on the 'Add row' button I don't get a message. Only new row is added.
I expect to stay in edit mode. How to solve this problem?
<h:panelGrid columns="2" cellpadding="5">
<h:outputText value="In cell editing" />
<p:dataTable id="inCellEditing" var="car" value="#{dataTableController.cars}" rowKey="#{car.name}" editable="true">
<p:ajax event="rowEdit" listener="#{dataTableController.onEdit}" update=":mainForm:growl" />
<p:ajax event="rowEditCancel" listener="#{dataTableController.onCancel}" update=":mainForm:growl" />
<p:column headerText="Year">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{car.year}" />
</f:facet>
<f:facet name="input">
<p:inputText value="#{car.year}">
<p:ajax event="blur" update="#this"/>
</p:inputText>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Name">
<p:cellEditor>
<f:facet name="output">
<h:outputText value="#{car.name}" />
</f:facet>
<f:facet name="input">
<h:selectOneMenu value="#{car.name}" >
<f:selectItems value="#{dataTableController.carNames}"
var="name"
itemLabel="#{name}"
itemValue="#{name}" />
</h:selectOneMenu>
</f:facet>
</p:cellEditor>
</p:column>
<p:column headerText="Actions">
<p:rowEditor />
</p:column>
</p:dataTable>
<p:commandButton action="#{dataTableController.addRow()}" value="Add row" ajax="false"/>
</h:panelGrid>
public class DataTableController implements Serializable {
private List<Car> cars;
private Car selectedCar;
private Car[] selectedCars;
private List<Car> selectedCarsList;
private SelectItem[] carNamesOptions;
public DataTableController() {
cars = new ArrayList<Car>(CarConverter.cars.values());
}
public String[] getCarNames() {
return CarConverter.cars.keySet().toArray(new String[0]);
}
public SelectItem[] getCarNamesAsOptions() {
carNamesOptions = createFilterOptions(CarConverter.cars.keySet().toArray(new String[0]));
return carNamesOptions;
}
private SelectItem[] createFilterOptions(String[] data) {
SelectItem[] options = new SelectItem[data.length + 1];
options[0] = new SelectItem("", "Select");
for(int i = 0; i < data.length; i++) {
options[i + 1] = new SelectItem(data[i], data[i]);
}
return options;
}
public void onEdit(RowEditEvent event) {
MessageUtil.addInfoMessage("car.edit", ((Car) event.getObject()).getName());
}
public void onCancel(RowEditEvent event) {
MessageUtil.addInfoMessage("car.edit.cancelled", ((Car) event.getObject()).getName());
}
public Car getSelectedCar() {
return selectedCar;
}
public void setSelectedCar(Car selectedCar) {
this.selectedCar = selectedCar;
}
public Car[] getSelectedCars() {
return selectedCars;
}
public void setSelectedCars(Car[] selectedCars) {
this.selectedCars = selectedCars;
}
public List<Car> getCars() {
return cars;
}
public void setCars(List<Car> cars) {
this.cars = cars;
}
public List<Car> getSelectedCarsList() {
return selectedCarsList;
}
public void setSelectedCarsList(List<Car> selectedCarsList) {
this.selectedCarsList = selectedCarsList;
}
public void addRow(){
cars.add(new Car("",0));
}
}