I have a rich calendar implemented using a CalendarDataModel. A modal panel is displayed when I select a date to mark it as a holiday or a recurring holiday.

<h:form id="calendarform">
 <a4j:outputPanel id="forceELFunctionSerialization" ajaxRendered="true" style="display: none">

 <a4j:jsFunction name="ajaxSubmit" oncomplete="#{rich:component('panel')}.show()" reRender="editContent" />
 </a4j:outputPanel>
 <rich:panel header="Test Calendar Data Model">
 <rich:calendar id="businessCalendar" value="#{calendarBean.selectedDate}" timeZone="#{calendarBean.timeZone}" datePattern="#{calendarBean.datePattern}" showApplyButton="#{calendarBean.showApply}" popup="#{calendarBean.popup}" enableManualInput="#{calendarBean.manualInput}" dataModel="#{calendarDataModel}" showWeeksBar="false" mode="ajax" valueChangeListener="#{calendarDataModel.valueChanged}" onchanged="if (event.rich.date) {ajaxSubmit();}" cellWidth="50px" cellHeight="50px" validator="#{calendarBean.validateDate}" >
 </rich:calendar>
 <a4j:commandButton value="Get Date" action="#{calendarBean.printDate}" />
 <h:inputHidden value="message" id="errorMessage"/>
 <h:message for="errorMessage" styleClass="errorMessage" style="color:red;font-family: Verdana, Helvetica, Arial, Sans-serif;font-size: 8pt;font-weight: bold;"/>
 </rich:panel>

 </h:form>
 <rich:modalPanel id="panel" resizeable="false">
 <f:facet name="header">Edit Day:</f:facet>
 <f:facet name="controls">
 <h:panelGroup>
 <h:graphicImage value="/images/modal/close.png" id="hidelink" styleClass="hidelink"/>
 <rich:componentControl for="panel" attachTo="hidelink" operation="hide" event="onclick"/>
 </h:panelGroup>
 </f:facet>
 <h:form>
 <h:panelGrid columns="2" id="editContent">
 <h:outputText value="Option:"/>
 <h:selectOneRadio id="breakpointcategory" value="#{calendarDataModel.holidayOption}" immediate="true" >
 <f:selectItems value="#{calendarDataModel.holidayCategories}"/>
 </h:selectOneRadio>
 <a4j:commandButton value="Store" action="#{calendarDataModel.storeDayDetails}" id="storebutton" oncomplete="#{rich:component('panel')}.hide()" reRender="businessCalendar"/>
 <button type="button" id="cancelbutton" onclick="#{rich:component('panel')}.hide()">Cancel</button>
 </h:panelGrid>
 </h:form>
 </rich:modalPanel>

I want to restrict the user to selecting date only in current year.
hence a valdator is associated with the Calendar which invokes the method validateDate() on the Calendar bean.

public void validateDate(FacesContext cont, UIComponent ucom, Object ob) throws Exception
 {
 Date da = (Date)ob;
 Calendar c = Calendar.getInstance();
 c.setTime(da);
 int year = c.get(Calendar.YEAR);
 if (c.get(Calendar.YEAR) != 2009) {
 FacesMessage message = new FacesMessage("Cannot set a holiday for " + year);
 cont.addMessage("calendarform:errorMessage", message);
 throw new ValidatorException(message);
 }
 }

I can see the following message in the jboss server.log.

WARNING: FacesMessage(s) have been enqueued, but may not have been displayed.
sourceId=calendarform:businessCalendar[severity=(INFO 0), summary=(Cannot set a holiday for 2010), detail=(Cannot set a holiday for 2010)]
sourceId=calendarform:errorMessage[severity=(INFO 0), summary=(Cannot set a holiday for 2010), detail=(Cannot set a holiday for 2010)]

But the modal panel is still displayed. How do I avoid displaying the modal panel if validation fails