Listbox Column Drag & Drop

    listHeader.addEventListener("onDrop", new EventListener() {
      public void onEvent(Event inEvent) throws Exception {
          DropEvent dropEvent = (DropEvent) inEvent;
          Component dragged = dropEvent.getDragged();
          int from = dragged.getParent().getChildren().indexOf(dragged);
          int to = listHeader.getParent().getChildren().indexOf(listHeader);
          ListModel model = getListMode()

          // then I have logic to swap cell data between the two columns in my listModel
          // create a new ListitemRenderer based on my modified listModel
          // call setItemRenderer(ListitemRenderer)
          // call renderAll()

          // finally I swapped the positions of two listHeader objects within their Listhead parent.
          Component toObject = (Component) listHead.getChildren().get(to);
          dragged.setParent(null);
          if (to > from) {
              listHead.insertBefore(dragged, toObject.getNextSibling());
          } else {
              listHead.insertBefore(dragged, toObject);
          }
          // re-evaluate the first-column checkmark boxes and geometry.
          invalidate();
      }
   }

public void onCreate$filter_bar() throws Exception {
		logger.info("ON CREATE EXECUTE");
		System.out.println("Create");
		System.out.println("Service Id initial " +getCkServiceIds());
		
		//ListModelList
		
				
		//lbox_season.setModel(new ListModelList(getCertilogoServiceDao().getAllSeason(this.getCkServiceIds())));
		lbox_service.setModel(new ListModelList(getCertilogoServiceDao().getAllServices(this.getCkServiceIds())));
		<b >lbox_service.setItemRenderer(new ServiceListModelItemRenderer());</b>
		
		ListModelList lml_service = (ListModelList) lbox_service.getModel();
		//ListModelList lml_season = (ListModelList) lbox_season.getModel();
				
		logger.info("Done");
	}
	

public class ServiceListModelItemRenderer implements ListitemRenderer,Serializable {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	private static final Logger logger = Logger.getLogger(ServiceListModelItemRenderer.class);

	public void render(Listitem item, Object data) throws Exception {
		// TODO Auto-generated method stub
		final CertilogoService service_list = (CertilogoService) data;
		
		final Listcell lc = new Listcell(service_list.getServiceName());
		lc.setParent(item);
				
		item.setAttribute("data", data);
		//item.appendChild(lc);
		
	}

}

 java.util.HashMap cannot be cast to com.certilogo.ecc.backend.entities.CertilogoService
	at com.certilogo.ecc.frontend.ServiceListModelItemRenderer.render(ServiceListModelItemRenderer.java:22)

	@SuppressWarnings("unchecked")
	public <T>List<T> getServices(String serviceIds) {
		// TODO Auto-generated method stub
		System.out.println("Executing Service");
		System.out.println("Service Id>> " +serviceIds);
		Query query;
		if(serviceIds.equals("") || serviceIds.equals(null)) {
			query = entityManager.createQuery("SELECT new map (s.serviceId as serviceId, s.serviceName as serviceName) from CertilogoService s");
		} else {
			query = entityManager.createQuery("SELECT new map (s.serviceId as serviceId, s.serviceName as serviceName) from CertilogoService s where serviceId in("+serviceIds+")");
		}
		
		List result = query.getResultList();
	
		System.out.println("Result Value :" +result.get(0));
		System.out.println("Query :" +result);
		return result;

	}

<?xml version="1.0" encoding="UTF-8" ?>
<?taglib uri="http://www.zkoss.org/dsp/web/core" prefix="c"?>
<?variable-resolver class="org.zkoss.zkplus.spring.DelegatingVariableResolver"?>

<zk xmlns="http://www.zkoss.org/2005/zul"
	xmlns:h="http://www.w3.org/1999/xhtml"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://www.zkoss.org/2005/zul http://www.zkoss.org/2005/zul/zul.xsd">


	<window id="filter_bar"
		border="none"
		apply="${baseController}" closable="false" width="800px" height="520px"
		sizable="true">
		<grid>
			<columns>
				<column label="Select Service" width="50%">
					<listbox id="lbox_service" mold="select" rows="1">
						<listitem self="@{each=each1}" label="@{each1.serviceName}" value="@{each1.serviceId}"/>
					</listbox>
				</column>
				
				<column label="Select Season" width="50%">
					<listbox id="lbox_season" mold="select" rows="1">
						<listitem self="@{each=each1}" label="@{each1.season}" value="@{each1.seasonId}"/>
					</listbox>
				</column>
				
			</columns>
	</grid>				
	</window>
</zk>