1 Reply Latest reply on May 7, 2008 7:50 PM by Ronald van Kuijk

    Problem using SelectItems inside selectOneMenu

    David Ling Newbie

      Hi,

      I am having some problems with using a

      <f:selectItems>
      element inside
      <h:selectOneMenu>
      .

      To start off I created a Jbpm4Jsf tag/class that loads up a list of users, which I have tried to put into a Map and now a List. I return this Map/List as the target inside the page and then place the target as the SelectItems value.

      Please see code below

      <ga:responseActions>
       <j4j:listAcademics target="#{academics}"/>
      </ga:responseActions>
      
       <jbpm:datacell>
       <f:facet name="header">
       <h:outputText value="Supervisor"/>
       </f:facet>
       <h:selectOneMenu value="#{var['potentialsupervisor']}">
       <f:selectItems value="#{academics}"/>
       </h:selectOneMenu>
      <!-- <h:inputText value="#{var['potentialsupervisor']}"/>-->
       </jbpm:datacell>
      


      However, when I submit my form, it throws a bunch of exceptions
      javax.servlet.ServletException
       javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
       org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
      
      
      root cause
      
      java.lang.IllegalArgumentException
       javax.faces.component.SelectItemsIterator.next(SelectItemsIterator.java:166)
       javax.faces.component.SelectItemsIterator.next(SelectItemsIterator.java:49)
       javax.faces.component.UISelectOne.matchValue(UISelectOne.java:165)
       javax.faces.component.UISelectOne.validateValue(UISelectOne.java:137)
       javax.faces.component.UIInput.validate(UIInput.java:868)
       javax.faces.component.UIInput.executeValidate(UIInput.java:1071)
       javax.faces.component.UIInput.processValidators(UIInput.java:663)
       javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1021)
       javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1021)
       javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1021)
       javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1021)
       javax.faces.component.UIForm.processValidators(UIForm.java:229)
       javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1021)
       javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1021)
       javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1021)
       javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:662)
       com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:100)
       com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:248)
       com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:117)
       javax.faces.webapp.FacesServlet.service(FacesServlet.java:244)
       org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
      
      


      The tag/class I use to list all the academics is the following
      public final class ListAcademicsActionListener implements JbpmActionListener {
       private final ValueExpression targetExpression;
      
       public ListAcademicsActionListener(final ValueExpression targetExpression) {
       this.targetExpression = targetExpression;
       }
      
       public String getName() {
       return "listAcademics";
       }
      
       @SuppressWarnings ({"unchecked"})
       public void handleAction(JbpmJsfContext context, ActionEvent event) {
       try {
       final FacesContext facesContext = FacesContext.getCurrentInstance();
       final ELContext elContext = facesContext.getELContext();
       final Collection<SelectItem> academicsList = new Vector<SelectItem>();
      ... //queries DB some academics names and their userID
      
       while(academics.next()){
       SelectItem academic = new SelectItem(lecturerLogin, lecturer);
       academicsList.add(academic);
       }
       targetExpression.setValue(elContext, Collections.unmodifiableCollection(academicsList));
       context.selectOutcome("success");
       }
      


      So far all the lecturer's names and logins come up fine, but the problem is when I submit the form. I've searched around and there seems to be similar problems, but never quite the same. Any help is appreciated.

      Thanks

      David