/**
* Constructs a new statistics data transfer object for the specified {@link Game}.
*
* @param game game to get statistics for
* @param user user to get statistics for
*/
public GameBetStatisticsDTO(Game game, User user) {
this();
List<Bet> bets = game.getBets();
numberOfBets = bets.size();
Map<Integer, UserBet> userBetsMap =
user != null
? new ArrayList<>(user.getBets())
.stream()
.collect(Collectors.toMap(b -> b.getBet().getId(), b -> b))
: null; // BUGFIX: new ArrayList<>(...) needed in eclipselink < 2.7
List<Map<Bet, BigDecimal>> checkGroups = new ArrayList<>();
for (Bet bet : bets) {
evaluated &= bet.getOccurred() != null;
BigDecimal betPotentialGain = BigDecimal.ZERO;
List<UserBet> userBets =
user == null
? bet.getUserBets()
: userBetsMap.containsKey(bet.getId())
? Arrays.asList(userBetsMap.get(bet.getId()))
: Arrays.asList();
numberOfUserBets += userBets.size();
for (UserBet userBet : userBets) {
betsStake = betsStake.add(userBet.getStake());
betPotentialGain = betPotentialGain.add(userBet.getPotentialGain());
if (Boolean.TRUE.equals(userBet.getBet().getOccurred()))
betsAmountWon = betsAmountWon.add(userBet.getGain());
else if (Boolean.FALSE.equals(userBet.getBet().getOccurred()))
betsAmountLost = betsAmountLost.add(userBet.getGain().negate());
}
betsPotentialGain = betsPotentialGain.add(betPotentialGain);
boolean addedToCheck = false;
for (Map<Bet, BigDecimal> checkGroup : checkGroups)
if (addedToCheck = checkGroup.keySet().stream().noneMatch(b -> compatible(bet, b))) {
checkGroup.put(bet, betPotentialGain);
break;
}
if (!addedToCheck) checkGroups.add(MapBuilder.single(bet, betPotentialGain));
}
betsAmountSum = betsAmountWon.subtract(betsAmountLost);
betsPotentialLoss =
checkGroups
.stream()
.map(g -> g.values().stream().max((a, b) -> a.compareTo(b)).get())
.reduce((a, b) -> a.add(b))
.orElse(betsPotentialLoss);
}
private boolean compatible(Bet bet1, Bet bet2) {
Map<BetType, BiPredicate<Bet, Bet>> subMap;
BiPredicate<Bet, Bet> check;
if ((subMap = COMPATIBLE_CHECKS.getOrDefault(bet1.getType(), null)) != null
&& (check = subMap.getOrDefault(bet2.getType(), null)) != null)
return check.test(bet1, bet2);
else if ((subMap = COMPATIBLE_CHECKS.getOrDefault(bet2.getType(), null)) != null
&& (check = subMap.getOrDefault(bet1.getType(), null)) != null)
return check.test(bet2, bet1);
else return true;
}