When I put Cells in my grid rows, in sorting, a ClassCastException Happens.
The stackTrace is :
Dec 21, 2011 11:55:21 AM org.zkoss.zk.ui.impl.UiEngineImpl handleError:1279
SEVERE: >>java.lang.ClassCastException: org.zkoss.zul.Cell
>> at org.zkoss.zul.RowComparator.compare(RowComparator.java:162)
>> at java.util.Arrays.mergeSort(Arrays.java:1270)
>> at java.util.Arrays.mergeSort(Arrays.java:1281)
>> at java.util.Arrays.mergeSort(Arrays.java:1281)
>> at java.util.Arrays.sort(Arrays.java:1210)
>> at org.zkoss.zk.ui.Components.sort(Components.java:142)
>> at org.zkoss.zk.ui.Components.sort(Components.java:93)
>> at org.zkoss.zul.Column.sort0(Column.java:413)
>> at org.zkoss.zul.Column.doSort(Column.java:388)
>> at org.zkoss.zul.Column.sort(Column.java:360)
>> at org.zkoss.zul.Column.onSort(Column.java:588)
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>> at java.lang.reflect.Method.invoke(Method.java:597)
>> at org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:207)
>> at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:138)
>> at org.zkoss.zk.ui.impl.UiEngineImpl.processEvent(UiEngineImpl.java:1635)
>> at org.zkoss.zk.ui.impl.UiEngineImpl.process(UiEngineImpl.java:1419)
>> at org.zkoss.zk.ui.impl.UiEngineImpl.execUpdate(UiEngineImpl.java:1132)
>> at org.zkoss.zk.au.http.DHtmlUpdateServlet.process(DHtmlUpdateServlet.java:562)
>> at org.zkoss.zk.au.http.DHtmlUpdateServlet.doGet(DHtmlUpdateServlet.java:457)
>> at org.zkoss.zk.au.http.DHtmlUpdateServlet.doPost(DHtmlUpdateServlet.java:466)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:718)
>> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>> at com.prs.solution.web.filter.locale.PRSLocaleFilter.doFilter(PRSLocaleFilter.java:40)
>> at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>> at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>> at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
>> at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
>> at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
>> at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
>> at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:111)
>> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
>> at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
>> at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:589)
>> at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
>> at java.lang.Thread.run(Thread.java:619)