@Override
	public int hashCode()
	{
		final int prime = 31;
		int result = 1;
		result = prime * result + (isOccupied ? 1231 : 1237);
		result = prime * result
				+ ((occuppiedFrom == null) ? 0 : occuppiedFrom.hashCode());
		result = prime * result
				+ ((occuppiedTo == null) ? 0 : occuppiedTo.hashCode());
		result = prime * result
				+ ((position == null) ? 0 : position.hashCode());
		return result;
	}