public static Weight[] calculateWeights(List list, String valueRef)
throws NoSuchFieldException, SecurityException, IllegalArgumentException,
IllegalAccessException {
Weight weight;
int sum = 0;
int size = list.size();
Weight[] resultList = new Weight[size];
for (int i = 0; i < size; i++) {
Object item = list.get(i);
Class cls = item.getClass();
Field field = cls.getDeclaredField(valueRef);
int value = field.getInt(item);
sum += value;
weight = new Weight();
weight.data = item;
weight.value = value;
resultList[i] = weight;
}
double inc = 0;
for (int j = 0; j < size; j++) {
weight = resultList[j];
weight.proportion = weight.value / sum;
weight.lower = inc;
inc += weight.proportion;
weight.upper = inc;
}
return resultList;
}
