Hi,

i'm trying to use ExtendedTabledataModel with rich:dataTable.
I have implemented my DataProvider, here is the code:

public class DiscreteTaskProvider implements DataProvider<DiscreteTask> {
 private static final long serialVersionUID = 1L;

 private static final Log log = LogFactory.getLog(DiscreteTaskProvider.class);

 private List<DiscreteTask> items;

 public DiscreteTaskProvider() {
 }

 public DiscreteTaskProvider(List<DiscreteTask> items) {
 this.items = items;
 }

 public void setItems(List<DiscreteTask> items) {
 this.items = items;
 }

 public DiscreteTask getItemByKey(Object key) {
 DiscreteTask result = null;
 if (key != null)
 for (DiscreteTask entity : getItems())
 if (key.equals(new DisplayableKey(entity))) {
 result = entity;
 break;
 }
 return result;
 }

 public List<DiscreteTask> getItems() {
 return items;
 }

 public List<DiscreteTask> getItemsByRange(int firstRow, int lastRow) {
 return getItems().subList(firstRow, lastRow);
 }

 public Object getKey(DiscreteTask item) {
 return new DisplayableKey(item);
 }

 public int getRowCount() {
 return getItems().size();
 }
}

I'm using my Own Class DisplayableKey as PK. So it is not a Integer. And it seems that this makes problem with rich:dataTable. The first load and show of table in browser just works but I get an exception if i try to sort the table.

Caused by: javax.faces.convert.ConverterException: j_id33:dtTable: Could not convert '0' to a string.
 at javax.faces.convert.IntegerConverter.getAsString(IntegerConverter.java:151)
 at org.ajax4jsf.component.UIDataAdaptor.getClientId(UIDataAdaptor.java:715)
 at javax.faces.component.UIComponent.getContainerClientId(UIComponent.java:374)
 at javax.faces.component.UIComponentBase.getClientId(UIComponentBase.java:279)
 at org.ajax4jsf.component.UIDataAdaptor.restoreChildState(UIDataAdaptor.java:964)
 at org.ajax4jsf.component.UIDataAdaptor.restoreChildState(UIDataAdaptor.java:986)
 at org.ajax4jsf.component.UIDataAdaptor.restoreChildState(UIDataAdaptor.java:943)
 at org.ajax4jsf.component.UIDataAdaptor.setRowKey(UIDataAdaptor.java:361)
 at org.ajax4jsf.component.UIDataAdaptor$ComponentVisitor.process(UIDataAdaptor.java:95)
 at org.richfaces.model.ExtendedTableDataModel.walk(ExtendedTableDataModel.java:183)
 at org.ajax4jsf.component.UIDataAdaptor.walk(UIDataAdaptor.java:1151)
 at org.ajax4jsf.component.UIDataAdaptor.iterate(UIDataAdaptor.java:1042)
 ... 40 more
Caused by: java.lang.ClassCastException: com.tsystems.eurojet.ejfin.de.DisplayableKey cannot be cast to java.lang.Number
 at javax.faces.convert.IntegerConverter.getAsString(IntegerConverter.java:149)
 ... 51 more

With rich:extendedDataTable no problem.

What could be wrong here?

thanks a lot
Dmitri