private TransactionUpdater recalculate(List<TTransaction> list) {
// the first one should not be updated at all (that is a pivot element)
if (list.isEmpty()) {
System.out.println(
"[WARNING] pivot is null, list is empty. " + TransactionUpdater.class.getSimpleName());
return this;
}
// list.isEmpty() == FALSE
int offset;
for (offset = 0; offset < list.size() && !list.get(offset).isPivot(); ++offset) ;
/* in case when no pivot found: nothing to be done */
if (offset == list.size()) return this;
int balance = list.get(offset).getBalance();
TChargeAccount ca = list.get(offset).getCa();
info("offset = %d, list.size = %d", offset, list.size());
for (int i = offset + 1; i < list.size(); ++i) {
TTransaction t = list.get(i);
if (t.isPivot()) {
t.setAmount(t.getBalance() - balance);
info("IS PIVOT: %s", t);
/* henceforth use the new balance */
balance = t.getBalance();
} else {
if (t.getCatransfer().equals(ca)) {
/**
* Transfer transaction (beneficiary side, who gets), balance: don't modify, because this
* balance is that of the other one (who gives)
*/
Assert.assertTrue(!t.getCa().equals(ca) && !t.getCa().equals(none));
Assert.assertTrue(t.getCluster().equals(athelyezes) && athelyezes.getSgn() == -1);
// t.setBalance(balance + t.getAmount());
balance += t.getAmount();
} else if (t.getCa().equals(ca)) {
/**
* Simple transaction, knowing the sign (direction: in/out) of the amount, which we are
* talking about
*/
Assert.assertTrue(!t.getCatransfer().equals(ca));
t.setBalance(balance + t.getCluster().getSgn() * t.getAmount());
balance = t.getBalance();
}
}
}
return this;
}
