NullPointerException when using <f:selectItem>
codest Mar 12, 2007 10:14 AMHi,
I'm having a strange problem with the following code:
<h:selectOneMenu id="anredebox" value="#{personalDataItem.anrede}" > <f:selectItem itemValue="#{msgs.interview_anrede_frau}" itemLabel="#{msgs.interview_anrede_frau}"/> <f:selectItem itemValue="#{msgs.interview_anrede_herr}" itemLabel="#{msgs.interview_anrede_herr}"/> </h:selectOneMenu>
Backing Bean (extract):
@Entity @Name("personalDataItem") @Scope(SESSION) /** * Class PersoenlicheDatenItem */ public class PersoenlicheDatenItem extends CategoryItem implements PersoenlicheDatenItemInterface, Serializable { // // Fields // /** * Anrede "Frau" oder "Herr" */ @NotNull private String anrede;
Of course, there is an interface with appropriate getters and setters.
When I'm submitting the form, I receive the following exception:
java.lang.NullPointerException: value at javax.faces.model.SelectItem.<init>(SelectItem.java:71) at javax.faces.component._SelectItemsIterator.hasNext(_SelectItemsIterator.java:72) at javax.faces.component._SelectItemsUtil.matchValue(_SelectItemsUtil.java:46) at javax.faces.component.UISelectOne.validateValue(UISelectOne.java:62) at javax.faces.component.UIInput.validate(UIInput.java:353) at javax.faces.component.UIInput.processValidators(UIInput.java:183) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:624) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:624) at javax.faces.component.UIForm.processValidators(UIForm.java:70) at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:624) at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:146) at org.apache.myfaces.lifecycle.LifecycleImpl.processValidations(LifecycleImpl.java:262) at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:76) at javax.faces.webapp.FacesServlet.service(FacesServlet.java:137) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:175) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:74) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105) at org.jboss.web.tomcat.tc5.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:869) at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:664) at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527) at org.apache.tomcat.util.net.MasterSlaveWorkerThread.run(MasterSlaveWorkerThread.java:112) at java.lang.Thread.run(Thread.java:595)
I wonder what I'm doing wrong, since I've seen such code in other examples where it seems to work. I'm also using <h:selectOneMenu>s with SelectItems provided by server-sided Beans and those work properly. Isn't it possible to generate selectItems like this?
Thanks for any help in advance!
Regards,
Jörg
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