NullpointerError when rendering a calendar with modal panel
k_krish_rao Aug 28, 2009 4:36 AMi use a rich:calendar associated with a calendardatamodel. I use the rich:clalendar to mark certain days as holidays. This is done using a modal panel displayed when days are clicked
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:ui="http://java.sun.com/jsf/facelets" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:a4j="http://richfaces.org/a4j" xmlns:c="http://java.sun.com/jstl/core" xmlns:rich="http://richfaces.org/rich"> <head> <title>RichFaces Editable DataTable</title> <style type="text/css"> .hpsa-calendar-weekend { background-color: #00FFFF } .hpsa-calendar-working { background-color: #FFFFFF; } .hpsa-calendar-holiday { background-color: #0000FF; } .hpsa-calendar-recholiday { background-color: #00FF00; } </style> </head> <body> <h:form id="calendarform"> <a4j:jsFunction name="ajaxSubmit" oncomplete="#{rich:component('panel')}.show()" reRender="editContent" /> <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" boundaryDatesMode="scroll" mode="ajax" onchanged="if (event.rich.date) {ajaxSubmit();}"> </rich:calendar> <a4j:commandButton value="Get Date" action="#{calendarBean.printDate}" /> </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="Short Description:"/> <button type="button" id="cancelbutton" onclick="#{rich:component('panel')}.hide()">Cancel</button> </h:panelGrid> </h:form> </rich:modalPanel> </body> </html>
The CalendarDataModel implementation is
public class CalendarDataModelImpl implements CalendarDataModel { private CalendarDataModelItem[] items; private Date currentDate; private boolean holiday = false; private boolean recurringHoliday = false; public CalendarDataModelItem[] getData(Date[] dateArray) { System.out.println("In CalendarDataModelImpl getData() arg0::" + dateArray); if (dateArray == null) { return null; } System.out.println("dateArray size::"+dateArray.length); items = new CalendarDataModelItem[dateArray.length]; for (int i = 0; i < dateArray.length; i++) { items = createDataModelItem(dateArray); } System.out.println("items size::"+items.length); return items; } protected CalendarDataModelItem createDataModelItem(Date date) { CalendarDataModelItemImpl item = new CalendarDataModelItemImpl(); Map<String, Boolean> data = new HashMap<String, Boolean>(); data.put("holiday", false); data.put("recurringholiday", false); Calendar c = Calendar.getInstance(); c.setTime(date); item.setDay(c.get(Calendar.DAY_OF_MONTH)); int weekday = c.get(Calendar.DAY_OF_WEEK); if (weekday == 5 || weekday == 6) { item.setStyleClass("hpsa-calendar-weekend"); item.setEnabled(false); } else { item.setStyleClass("hpsa-calendar-working"); item.setEnabled(true); } /*if (item.getDay() == 11) { item.setStyleClass("hpsa-calendar-holiday"); } if (item.getDay() == 24) { item.setStyleClass("hpsa-calendar-recholiday"); }*/ item.setData(data); return item; } public Object getToolTip(Date arg0) { // TODO Auto-generated method stub return null; } public CalendarDataModelItem[] getItems() { return items; } public void setItems(CalendarDataModelItem[] items) { this.items = items; } public boolean isHoliday() { return holiday; } public void setHoliday(boolean holiday) { this.holiday = holiday; } public boolean isRecurringHoliday() { return recurringHoliday; } public void setRecurringHoliday(boolean recurringHoliday) { this.recurringHoliday = recurringHoliday; } public void valueChanged(ValueChangeEvent event) { System.out.println(event.getNewValue() + "selected"); setCurrentDate((Date)event.getNewValue()); Calendar calendar = Calendar.getInstance(); calendar.setTime(getCurrentDate()); setHoliday((Boolean)((HashMap)items[calendar.get(Calendar.DAY_OF_MONTH) - 1].getData()).get("holiday")); setRecurringHoliday((Boolean)((HashMap)items[calendar.get(Calendar.DAY_OF_MONTH) - 1].getData()) .get("recurringholiday")); } public void storeDayDetails() { Calendar calendar = Calendar.getInstance(); calendar.setTime(getCurrentDate()); ((HashMap)items[calendar.get(Calendar.DAY_OF_MONTH) - 1].getData()).put("holiday", isHoliday()); ((HashMap)items[calendar.get(Calendar.DAY_OF_MONTH) - 1].getData()).put("recurringholiday", isRecurringHoliday()); } public Date getCurrentDate() { return currentDate; } public void setCurrentDate(Date currentDate) { this.currentDate = currentDate; } }
When the application is deployed and i click on any day in the current month, the modal panel is displayed. But when I change the month on the calendar to the next month I get the following error
2009-08-28 13:47:23,945 ERROR [STDERR] Aug 28, 2009 1:47:23 PM com.sun.facelets.FaceletViewHandler handleRenderException
SEVERE: Error Rendering View[/pages/listing.xhtml]
java.lang.NullPointerException
at org.apache.el.lang.FunctionMapperImpl$Function.writeExternal(FunctionMapperImpl.java:123)
at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1310)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1288)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at java.util.HashMap.writeObject(HashMap.java:1039)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:917)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1339)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at org.apache.el.lang.FunctionMapperImpl.writeExternal(FunctionMapperImpl.java:74)
at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1310)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1288)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at org.apache.el.ValueExpressionImpl.writeExternal(ValueExpressionImpl.java:256)
at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1310)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1288)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at com.sun.facelets.el.TagValueExpression.writeExternal(TagValueExpression.java:128)
at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1310)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1288)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1375)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1347)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1290)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1079)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1251)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1075)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:302)
at com.sun.faces.renderkit.ResponseStateManagerImpl.writeState(ResponseStateManagerImpl.java:244)
at javax.faces.render.ResponseStateManager.writeState(ResponseStateManager.java:155)
at org.ajax4jsf.application.AjaxStateManager.writeState(AjaxStateManager.java:294)
at org.ajax4jsf.application.AjaxStateManager.writeState(AjaxStateManager.java:256)
at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:606)
at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:100)
at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:176)
at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:178)
at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:290)
at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:368)
at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:495)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446)
at java.lang.Thread.run(Thread.java:595)