@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + ((amount == null) ? 0 : amount.hashCode());
		result = prime * result + ((description == null) ? 0 : description.hashCode());
		result = prime * result + ((facility == null) ? 0 : facility.hashCode());
		result = prime * result + ((id == null) ? 0 : id.hashCode());
		result = prime * result + ((pieceOfFurniture == null) ? 0 : pieceOfFurniture.hashCode());
		return result;
	}