Java EE (Java Enterprise Edition) General Discussion

Hi,

i have an DataTable:

		<h:dataTable id="bestellungenTabelle" value="#{kunden.detailsKunde.bestellungen}"
		             var="best" cellspacing="5"
		             rendered="#{not empty kunden.detailsKunde.bestellungen}">
			<h:column>
				<f:facet name="header">
					<h:outputText value="Ordernr"/>
				</f:facet>
				<h:outputText value="#{best.bnr}"/>
			</h:column>
		</h:dataTable>	

kunden is mapped in an XML File:

<managed-bean-name>kunden</managed-bean-name>
<managed-bean-class>de.bm.kundenverwaltung.ui.KundenBean</managed-bean-class> 
<managed-bean-scope>session</managed-bean-scope>

Here the variables in the ManagedBean (KundenBean):

private Kunde detailsKunde;

bestellungen is an Collection in Kunde, but when i call the jsp page i get the message:
'#{best.bnr}' Property 'bnr' not found on type org.hibernate.collection.PersistentSet


Here is the full stack trace:

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

javax.servlet.ServletException: /kundenverwaltung/panelGridDetails.jsp(66,4) '#{best.bnr}' Property 'bnr' not found on type org.hibernate.collection.PersistentSet
	javax.faces.webapp.FacesServlet.service(FacesServlet.java:256)
	org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)


root cause 

org.apache.jasper.el.JspPropertyNotFoundException: /kundenverwaltung/panelGridDetails.jsp(66,4) '#{best.bnr}' Property 'bnr' not found on type org.hibernate.collection.PersistentSet
	org.apache.jasper.el.JspValueExpression.getValue(JspValueExpression.java:104)
	javax.faces.component.UIOutput.getValue(UIOutput.java:173)
	com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getValue(HtmlBasicInputRenderer.java:189)
	com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.getCurrentValue(HtmlBasicRenderer.java:320)
	com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeEnd(HtmlBasicRenderer.java:200)
	javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:833)
	com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:279)
	com.sun.faces.renderkit.html_basic.TableRenderer.encodeChildren(TableRenderer.java:307)
	javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:809)
	javax.faces.component.UIComponent.encodeAll(UIComponent.java:886)
	javax.faces.component.UIComponent.encodeAll(UIComponent.java:892)
	com.sun.faces.application.ViewHandlerImpl.doRenderView(ViewHandlerImpl.java:244)
	com.sun.faces.application.ViewHandlerImpl.renderView(ViewHandlerImpl.java:175)
	com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106)
	com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251)
	com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144)
	javax.faces.webapp.FacesServlet.service(FacesServlet.java:245)
	org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)

Do I have to declare a new property?

I really dont know what to do, please help me...