public double getAverageCost() {
List<Cost> costs = costPersistence.getCosts();
if (isNullOrEmpty(costs)) {
return 0.;
}
double price = 0.0;
for (Cost cost : costs) {
price += cost.getPrice();
}
return price / costs.size();
}
public double getAveragePerPerson() {
List<Cost> costs = costPersistence.getCosts();
if (isNullOrEmpty(costs)) {
return 0.;
}
double price = 0.0;
int n = 0;
for (Cost cost : costs) {
price += cost.getPrice();
n += cost.getAffectedPeople() <= 0 ? 1 : cost.getAffectedPeople();
}
return price / n;
}
public double getAverageForType(CostType costType) {
List<Cost> costs = costPersistence.getCosts();
if (isNullOrEmpty(costs)) {
return 0.;
}
double price = 0.0;
int n = 0;
for (Cost cost : costs) {
if (cost.getCostType() != null
&& costType != null
&& cost.getCostType().getId() == costType.getId()) {
price += cost.getPrice();
n++;
}
}
System.out.println(
String.format(
"Average cost for %s is %s / %s = %s.",
costType == null ? "null" : costType.getName(), price, n, price / n));
return price == 0 ? 0 : price / n;
}