}
}
@SuppressWarnings({ "unchecked" })
private void readObject(ObjectInputStream input) throws IOException, ClassNotFoundException {
RelationFactory relationFactory = new QueryFactoryImpl().createRelationFactory();
Set<Attribute> newAttributes = new HashSet<Attribute>();
Set<Tuple> newTuples = new HashSet<Tuple>();
heading = (LinkedHashSet<Attribute>) input.readObject();
timeTaken = input.readLong();
hasProjected = input.readBoolean();