code: public boolean isActive() {
  		final long now = System.currentTimeMillis();
  		final long start = values.getStart();
  		final long end = start + values.getLeft();
  		// TODO : Ensure predicate consistency.
  		return now >= start && now <= end;
  	}
docs: <p>Indiciates if the contest is currently active,
  namely if competition is occuring at the current
  time, or not.</p>
  
  @return <tt>true</tt> if the contest is active, <tt>false</tt> otherwise.