public void wdDoInit() {
  //@@begin wdDoInit()
  msgMgr = wdComponentAPI.getMessageManager();

  // In order to avoid having to noodle around with reflection in the input
  // validator utility class, build a Vector of all the messages needed by
  // the input validator and pass it as a parameter
  Vector<IWDMessage> emptyFieldMsgs = new Vector<IWDMessage>();

  // In this case, the UI validator utility knows that the first message
  // relates to an empty string field and the second relates to an empty
  // numeric field
  emptyFieldMsgs.add(IMessageInputValidatorComp.EMPTY_STRING_FIELD);
  emptyFieldMsgs.add(IMessageInputValidatorComp.EMPTY_NUMERIC_FIELD);

  // Create a new instance of the input validator
  uiTreeVisitor = new UiTreeVisitor(wdComponentAPI.getMessageManager(),
                                    wdControllerAPI.getContext(),
                                    emptyFieldMsgs);
  //@@end
}