How to reset the value in valueChangeListener

Question

I would like to reset the value in a component to its earlier value in the valueChangeListener.
Here is an example method in the bean:
public void valueChangeListener(ValueChangeEvent valueChangeEvent) {
Date oldDate = (Date)valueChangeEvent.getOldValue();
Date newDate = (Date)valueChangeEvent.getNewValue();
if(newDate > sysdate) {
//valueChangeEvent.getComponent().WHATEVER.setValue(oldDate)
} else {
valueChangeEvent.getComponent().processUpdates(FacesContext.getCurrentInstance());
Please suggest the code that I need to put in comments.
Note: One way to achieve this is to bind the component to the bean and do a setValue. I do not want to do this(I have master-detail tables with many rows to edit. So, this resetting should be done at row level by fetching the current row on the selected table and set).

Answer 1

public void firstNameChanged(ValueChangeEvent event)
System.out.println("FirstName changed");
System.out.println("old value = " + event.getOldValue());
System.out.println("new value = " + event.getNewValue());
String oldValue = (String) event.getOldValue();
String newValue = (String) event.getNewValue();
RichInputText firstname = (RichInputText) event.getComponent();
RichInputText lastname = (RichInputText) JSFUtils.findComponentInRoot("EmployeesLastName");
firstname.setSubmittedValue(oldValue);
firstname.setValue(oldValue);
lastname.setSubmittedValue("lastname");
lastname.setValue("lastname");
AdfFacesContext.getCurrentInstance().addPartialTarget(firstname);
AdfFacesContext.getCurrentInstance().addPartialTarget(lastname);
}