Local-specific currency editor for JSpinner

Question

I found this code a while back that creates a locale-specific currency editor that I can set for a JSpinner. (see below)
Problem is that while the arrows follow the bounds set by the model, the user is allowed to type an invalid value in the text field and the model takes it.
I don't want to make the editor read-only...how do I make it force staying in the bounds of the model?
public static class CurrencyEditor extends DefaultEditor {
     public static final long serialVersionUID = 1L;
     public CurrencyEditor(JSpinner spinner) {
         super(spinner);
         final JFormattedTextField ftf = getTextField();
         ftf.setEditable(true);
         ftf.setFormatterFactory(new DefaultFormatterFactory(
              new CurrencyFormatter()));
         ftf.setHorizontalAlignment(SwingConstants.RIGHT);
     private class CurrencyFormatter extends
          JFormattedTextField.AbstractFormatter {
         public static final long serialVersionUID = 1L;
         public String valueToString(Object object) {
          if (object == null) {
              return "";
          NumberFormat curFormat = NumberFormat.getCurrencyInstance();
          return curFormat.format(object);
         public Object stringToValue(String string) throws ParseException {
          if (string == null || string.trim().length() == 0) {
              return null;
          Number number = null;
          NumberFormat curFormat = NumberFormat.getCurrencyInstance();
          NumberFormat numFormat = NumberFormat.getNumberInstance();
          try {
              number = curFormat.parse(string);
          } catch (ParseException ex) {
              try {
               number = numFormat.parse(string);
              } catch (ParseException ex2) {
               throw ex2;
          return number.doubleValue();
    }

Answer 1

Alright...so SpinnerNumberModel doesn't validate...so, somehow, I guess I have to force my custom editor to validate before applying.