DatePicker: cannot use date formats other than mm/dd/yy

[azakhark]

org.wicketstuff.jwicket.ui.datepicker.DatePicker has method setDateFormat() to set 'dateFormat' property. This makes me think that different formats are supported, but setting format to other than mm/dd/yy causes ParseException exception if on select notifications are enabled.

For example, following DatePicker:

final DatePicker datePicker = new DatePicker()
{
    @Override
    protected void onSelect(final AjaxRequestTarget target, final String pickedDate, final SpecialKeys specialKeys)
    {
    }
};
datePicker.setWantOnSelectNotification(true);
datePicker.setDateFormat("d M yy");

causes ParseException exception when date is selected:

java.text.ParseException: Unparseable date: "13 Nov 2015"
     at java.text.DateFormat.parse(DateFormat.java:337)
     at org.wicketstuff.jwicket.ui.datepicker.DatePicker.respond(DatePicker.java:97)
     at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:641)
     at java.lang.reflect.Method.invoke(Method.java:597)
     at org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
     at org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:241)
     at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:250)
     at org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:236)
     at org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:890)
     at org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
     at org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:261)
     at org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:218)
     at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:289)
     at org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:259)
     at org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:201)
     at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:282)
     at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
     at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
     at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
     at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
     at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
     at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:440)
     at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:230)
     at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
     at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
     at org.mortbay.jetty.Server.handle(Server.java:326)
     at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
     at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:926)
     at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
     at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
     at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
     at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
     at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)