@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (!getClass().equals(obj.getClass()))
			return false;
		Device other = (Device) obj;
		return id == other.id && idComponent == other.idComponent
				&& idPrev == other.idPrev && title.equals(other.title);
	}