6 Replies Latest reply on Mar 30, 2007 10:25 PM by Fernando Montaño

    What am I doing wrong - nested Set in a h:dataTable

    henrik lindberg Apprentice

      This is what I have in my view:

       <h:outputText value="Count = #{cspecInfo.attributeCount}" />
       <h:dataTable value="#{cspecInfo.componentAttributes}" var="attr"
       rows="25" >
       <h:column>
       <h:outputText value="#{attr.name}" />
       </h:column>
       </h:dataTable>
      

      The cspecInfo refers to an Entity that has a Set that is obtained as the value. (The output above refers to a transient attribute in the Entity bean (attributeCount).

      I get the correct count as output. So I know I have things in the set.
      When I try to render the #{attr.name} I get the following error:
      ALLVARLIG: Error Rendering View[/cspec-view.xhtml]
      javax.faces.el.PropertyNotFoundException: /cspec-view.xhtml @113,43 value="#{attr.name}": Bean: org.hibernate.collection.PersistentSet, property: name
       at com.sun.facelets.el.LegacyValueBinding.getValue(LegacyValueBinding.java:58)
       at javax.faces.component.UIOutput.getValue(UIOutput.java:77)
       at org.apache.myfaces.shared_impl.renderkit.RendererUtils.getStringValue(RendererUtils.java:217)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.renderOutput(HtmlTextRendererBase.java:69)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTextRendererBase.encodeEnd(HtmlTextRendererBase.java:57)
       at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:536)
       at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:442)
       at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChildren(RendererUtils.java:419)
       at org.apache.myfaces.shared_impl.renderkit.RendererUtils.renderChild(RendererUtils.java:440)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.renderColumnBody(HtmlTableRendererBase.java:332)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeColumnChild(HtmlTableRendererBase.java:301)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeInnerHtml(HtmlTableRendererBase.java:277)
       at org.apache.myfaces.shared_impl.renderkit.html.HtmlTableRendererBase.encodeChildren(HtmlTableRendererBase.java:123)
       at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:524)
       at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:244)
       at com.sun.facelets.tag.jsf.ComponentSupport.encodeRecursive(ComponentSupport.java:249)
       at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:573)
       at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:101)
       at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:222)
       at org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:384)
       at javax.faces.webapp.FacesServlet.service(FacesServlet.java:138)
       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.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:63)
       at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:57)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:79)
       at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:49)
       at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:84)
       at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
       at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:75)
       at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:213)
       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.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:432)
       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:619)
      


      ComponentAttribute does have the attribute "name".
      If I ouput something else - like static string - I get one row per object in the set (with the fixed string).

      This is what the parent (what cspecInfo refers to) has as definition:
       private Set<ComponentAttribute> m_componentAttributes;
       @OneToMany(mappedBy="spec")
       public Set<ComponentAttribute> getComponentAttributes()
       {
       return m_componentAttributes;
       }
       public void setComponentAttributes(Set<ComponentAttribute> attributes)
       {
       m_componentAttributes = attributes;
       }
       @Transient
       public String getAttributeCount()
       {
       if(m_componentAttributes == null)
       return "0";
       return new Integer(m_componentAttributes.size()).toString();
       }
      

      And the corresponding part in the detail entity looks like this:
       private ComponentSpec m_spec;
      
       @NotNull
       @Length(min = 1, max = 100)
       @Column(unique = true)
       public String getName()
       {
       return m_name;
       }
      

      (it has an id column called 'cattr_id')

      So - what am I doing wrong?
      Should I access the data some other way?

      Regards
      - henrik