Trigger/activate the RowEditor from bean for a primefaces In-Cell editing enabled p:dataTable

I have a primefaces p:dataTable with InCell editing enabled and want to trigger/activate the RowEditor for the newly added row.

Excerpt of XHTML

<p:commandButton id="btnAddEntry" value="Add new row" actionListener="#{myBean.addNewCar}" ... update="carTable growl" process="@this carTable ..."/>

<p:dataTable id="carTable" var="car" value="#{myBean.cars}" ... editable="true">  
        <p:column ...>  
            <p:cellEditor>
                ...
            </p:cellEditor>  
        </p:column>
    ...
        <p:column ...>  
                <p:rowEditor />  
        </p:column>
    ...         
</p:dataTable>

Here is what i have so far for the bean method:

public void addNewCar() {

    Car newCar = new Car();
    cars.add(newCar);

    FacesContext facesContext = FacesContext.getCurrentInstance();
    UIComponent uiTable = ComponentUtils.findComponent(facesContext.getViewRoot(), "carTable");
    DataTable table = (DataTable) uiTable;

    final AjaxBehavior behavior = new AjaxBehavior();    
    RowEditEvent rowEditEvent = new RowEditEvent(uiTable, behavior, table.getRowData());
    rowEditEvent.setPhaseId(PhaseId.UPDATE_MODEL_VALUES);
    table.broadcast(rowEditEvent);
}

i don't know

1. if this is the correct approach
2. in case yes, which object to pass to the constructor RowEditEvent(UIComponent component, Behavior behavior, Object object) as the 3rd parameter

If you have only one data table in the facelet try to use this

oncomplete="jQuery('.ui-datatable-data tr').last().find('span.ui-icon-pencil').each(function(){jQuery(this).click()});

Add this to the command button. This should work.