@Override
	public int compareTo(SingleCounter that) {
		final int BEFORE = -1;
	    final int EQUAL = 0;
	    final int AFTER = 1;
	    
		// TODO Auto-generated method stub
		if (this == that) return EQUAL;
		if (this.value < that.value) return AFTER;
	    if (this.value > that.value) return BEFORE;
		return EQUAL;
	}