@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		TradingData other = (TradingData) obj;
		if (planets == null) {
			if (other.planets != null)
				return false;
		} else if (!planets.equals(other.planets))
			return false;
		if (resourceTypes == null) {
			if (other.resourceTypes != null)
				return false;
		} else if (!resourceTypes.equals(other.resourceTypes))
			return false;
		return true;
	}