I\'ve read that the core JSF components support the f:param and f:attribute tag, in order to pass some values to the serverside for the enc
Finally i got it working !
Here's the jsf part :
And here is the source :
public List filterRace(String filterString) {
String filterValue = (String) UIComponent.getCurrentComponent(FacesContext.getCurrentInstance()).getAttributes().get("filter");
log.debug("filter string : " + filterString + ", with query filter of : " + filterValue);
....
return result;
}