salut tous le monde,

J'ai encore un problème avec ma <rich:pickList>, j'ai vraiment besoin d'aide.
en exécutant l'application je reçois un message d'erreur ci-dessous. j'ai débogger l'application et le message s'affiche exactement aprés la méthode selectCompanynamesOption(), l'erreur vient bien de la pickList. j'arrive pas à résoudre le poblème.

le message d'erreur est le suivant:
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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java.lang.NullPointerException
        at com.sun.facelets.util.FastWriter.write(FastWriter.java:77)
        at com.sun.facelets.StateWriter.write(StateWriter.java:116)
        at com.sun.faces.renderkit.html_basic.HtmlResponseWriter.write(HtmlResponseWriter.java:495)
        at org.richfaces.renderkit.PickListRenderer.encodeItem(PickListRenderer.java:194)
        at org.richfaces.renderkit.PickListRenderer.encodeRows(PickListRenderer.java:152)
        at org.richfaces.renderkit.PickListRenderer.encodeSourceRows(PickListRenderer.java:209)
        at org.richfaces.renderkit.html.PickListRendererGen.doEncodeChildren(PickListRendererGen.jav
a:344)
        at org.richfaces.renderkit.html.PickListRendererGen.doEncodeChildren(PickListRendererGen.jav
a:258)
        at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:282)
        at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262)
        at org.ajax4jsf.renderkit.html.AjaxOutputPanelRenderer.encodeChildren(AjaxOutputPanelRendere
r.java:79)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.ja
va:271)
        at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:242)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
        at javax.faces.render.Renderer.encodeChildren(Renderer.java:137)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:812)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
        at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
        at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
        at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:189)
        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.servletService(ApplicationFilterChain.jav
a:411)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:317)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
 
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
        at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:85)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:73)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:154)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:260)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:366)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:493)
        at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:60)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:68)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:230)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
 
        at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:390)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.j
ava:230)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:198)
 
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:288)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:27
1)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:202)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:206)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:150)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:632)
        at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:577)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:571)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1080)
        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:272)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProces
sorTask.java:637)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorT
ask.java:568)
        at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTas
k.java:813)
        at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultRead
Task.java:341)
        at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
 
        at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
 
        at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
        at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106
)
le backing bean est lesuivant:
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@Stateful
@Name("adminAction")
@Scope(ScopeType.SESSION)
public class AdminActionBean implements AdminActionLocal {
 
@Out(required=false)
   private List<Customer> companyNames;
 
   @Out(required=false)
   private ArrayList<SelectItem> companyNamesOption;
 
   @In(required=false)
   @Out(required=false)
   private List<Long> customersChoice = new ArrayList<Long>();
 
public void selectCompanyNames(){
       setCompanyNames((List<Customer>) getEm().createQuery("select c from Customer c")
                    .getResultList());
   }
 
   @Factory("companyNamesOption")
   public void selectCompanyNamesOption(){
 
       selectCompanyNames();
       for (int i=0;i <companyNames.size();i++){
           log.info("customers size =#0",companyNames.size());
           if(companyNamesOption== null)
               companyNamesOption  = new ArrayList<SelectItem>();
           SelectItem item = new SelectItem(companyNames.get(i).getCustomerId(), companyNames.get(i)
.getCompanyName(), companyNames.get(i).getCompanyName() );
           companyNamesOption.add(item);
           log.info("customers size2 =#0",customers.size());
       }
   }
....
// getter and setter
...
ma page .xhtml est :
Code : Sélectionner tout - Visualiser dans une fenêtre à part
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<rich:pickList id="customersChoice"  value="#{adminAction.customersChoice}">
                    <f:selectItems  value="#{companyNamesOption}" />
                </rich:pickList>
Est ce qu'il y a quelqu'un qui peut m'aider

grand merci