public static Predicate<Tuple<NodeId>> getFilter(Context context) {
Object x = context.get(SystemTDB.symTupleFilter);
try {
@SuppressWarnings("unchecked")
Predicate<Tuple<NodeId>> f = (Predicate<Tuple<NodeId>>) x;
return f;
} catch (ClassCastException ex) {
throw new TDBException("Not a Filter<Tuple<NodeId>>:" + x, ex);
}
}
public static OpExecutorFactory getFactory(Context context) {
return (OpExecutorFactory) context.get(ARQConstants.sysOpExecutorFactory);
}