How to sort web dynpro table wich data bind to CAF Entity Service

Question

Hi
I created UI Table based on Model Node (CAF Entity).
When I try to sort this Table with using TableSorter, I  get following in the trace log:
The error is: com.sap.caf.rt.exception.CAFBaseRuntimeException: Aspect does not support changing rows via its list interface
Have I met CAF limitation, or do I do something wrong?

Answer 1

Hi Nikolai,
if you use the implementation
<code>
IServiceFacade serviceFacade = CAFServiceFactory.getServiceFacade(ts2Definition.class);
</code>
it means you use the typed access.
Possible in this sneak the
<code>
     IServiceFacade serviceFacade = CAFServiceFactory.getServiceFacade();
</code>
does not work.
Try the following way - it must work.
<code>
     private IServiceFacade getServiceFacade()  {
          final String method = "getServiceFacade()";
          entering(method);
          if (m_serviceFacade==null) {
               try {
          CoolConnectionProperties properties = new CoolConnectionProperties()
               public String getCoolHost()
                    return "caf";
                     m_serviceFacade = CoolUtils.getServiceFacade(properties);
               } catch (CoolConnectionPropertiesException e) {
                    wdComponentAPI.getMessageManager().reportException(e.getMessage(),false);
                    CAFUIPublicLogger.traceThrowable(Severity.ERROR, method, e) ;
               } catch (CoolUtilsException e) {
                    wdComponentAPI.getMessageManager().reportException(e.getMessage(),false);
                    CAFUIPublicLogger.traceThrowable(Severity.ERROR, method, e) ;
          exiting(method) ;
          return  m_serviceFacade;
</code>
Also do not sort in query. Sort the model node after you aspect binded. Use the method
node.sort(your_comparator) ;
the comparator like this:
<code>
     public class YourComparator implements Comparator
       public int compare(Object o1, Object o2)
          IWDNodeElement nodeElement1 = (IWDNodeElement) o1 ;
          IWDNodeElement nodeElement2 = (IWDNodeElement) o2 ;
          String name1 = nodeElement1.getAttributeAsText(_attrName) ;
          String name2 = nodeElement2.getAttributeAsText(_attrName) ;
          if (name1 == null)
               return -1 ;     
          if (name2 == null)
               return 1 ;     
          if (_direction == "up")
               return name1.compareToIgnoreCase(name2) ; 
          else if (_direction == "down")
               return -name1.compareToIgnoreCase(name2) ;
          return 0 ;
       public void initilize(String attrName, String direction)
          _attrName = attrName ;
          _direction = direction ;
       private String _attrName ;
       private String _direction ;
</code>
Best regards,
Aliaksei.