@Override
  public MonetarySummaryStatistics combine(MonetarySummaryStatistics summaryStatistics) {
    Objects.requireNonNull(summaryStatistics);

    if (!equals(summaryStatistics)) {
      return this;
    }
    min = MonetaryFunctions.min(min, summaryStatistics.getMin());
    max = MonetaryFunctions.max(max, summaryStatistics.getMax());
    sum = sum.add(summaryStatistics.getSum());
    count += summaryStatistics.getCount();
    average = sum.divide(count);
    return this;
  }
Exemplo n.º 2
0
  public static void main(String[] args) {
    // getting CurrencyUnit by currency code and locale
    CurrencyUnit euro = Monetary.getCurrency("EUR");
    CurrencyUnit dollar = Monetary.getCurrency(Locale.US);

    System.out.println("getting CurrencyUnit by currency code and locale");
    System.out.printf("%s\n", euro);
    System.out.printf("%s\n", dollar);

    // getting MonetaryAmount by currency code and CurrencyUnit, without using Money (implementation
    // class)
    MonetaryAmount fiveEuro = Money.of(5, euro);
    MonetaryAmount twelveEuro = Money.of(new BigDecimal("12"), euro);
    MonetaryAmount tenDollar = Money.of(10, "USD");
    MonetaryAmount tenPound =
        Monetary.getDefaultAmountFactory().setNumber(10).setCurrency("GBP").create();

    System.out.println();
    System.out.println(
        "getting MonetaryAmount by currency code and CurrencyUnit, without using Money (implementation class)");
    System.out.printf("5 EUR: %s\n", fiveEuro);
    System.out.printf("12 EUR: %s\n", twelveEuro);
    System.out.printf("10 USD: %s\n", tenDollar);
    System.out.printf("10 GBP: %s\n", tenPound);

    // getting currency, the numeric amount and precision
    MonetaryAmount amount = Money.of(123.45, euro);

    System.out.println();
    System.out.println("getting currency, the numeric amount and precision");
    System.out.printf("123.45 EUR (currency): %s\n", amount.getCurrency());
    System.out.printf("123.45 EUR (long): %s\n", amount.getNumber().longValue());
    System.out.printf("123.45 EUR (number): %s\n", amount.getNumber());
    System.out.printf(
        "123.45 EUR (fractionNumerator): %s\n", amount.getNumber().getAmountFractionNumerator());
    System.out.printf(
        "123.45 EUR (fractionDenominator): %s\n",
        amount.getNumber().getAmountFractionDenominator());
    System.out.printf(
        "123.45 EUR (amount, BigDecimal): %s\n", amount.getNumber().numberValue(BigDecimal.class));

    // aritmetic
    MonetaryAmount seventeenEuros = fiveEuro.add(twelveEuro);
    MonetaryAmount sevenEuros = twelveEuro.subtract(fiveEuro);
    MonetaryAmount tenEuro = fiveEuro.multiply(2);
    MonetaryAmount twoPointFiveEuro = fiveEuro.divide(2);

    System.out.println();
    System.out.println("aritmetic");
    System.out.printf("5 EUR + 12 EUR: %s\n", seventeenEuros);
    System.out.printf("12 EUR - 5 EUR: %s\n", sevenEuros);
    System.out.printf("5 EUR * 2: %s\n", tenEuro);
    System.out.printf("5 EUR / 2: %s\n", twoPointFiveEuro);

    // negative
    MonetaryAmount minusSevenEuro = fiveEuro.subtract(twelveEuro);

    System.out.println();
    System.out.println("negative");
    System.out.printf("5 EUR - 12 EUR: %s\n", minusSevenEuro);

    // Note that MonetaryAmounts need to have the same CurrencyUnit to do mathematical operations
    // this fails with: javax.money.MonetaryException: Currency mismatch: EUR/USD
    // fiveEuro.add(tenDollar);

    // comparing
    System.out.println();
    System.out.println("comparing");
    System.out.printf("7€ < 10€: %s\n", sevenEuros.isLessThan(tenEuro));
    System.out.printf("7€ > 10€: %s\n", sevenEuros.isGreaterThan(tenEuro));
    System.out.printf("10 > 7€: %s\n", tenEuro.isGreaterThan(sevenEuros));

    // rounding
    MonetaryAmount euros = Money.of(12.34567, "EUR");
    MonetaryAmount roundedEuros = euros.with(Monetary.getDefaultRounding());

    System.out.println();
    System.out.println("rounding");
    System.out.printf("12.34567 EUR redondeados: %s\n", roundedEuros);

    // streams
    List<MonetaryAmount> amounts = new ArrayList<>();
    amounts.add(Money.of(2, "EUR"));
    amounts.add(Money.of(7, "USD"));
    amounts.add(Money.of(18, "USD"));
    amounts.add(Money.of(42, "USD"));
    amounts.add(Money.of(13.37, "GBP"));

    // filter
    List<MonetaryAmount> onlyDollars =
        amounts.stream().filter(MonetaryFunctions.isCurrency(dollar)).collect(Collectors.toList());

    System.out.println();
    System.out.println("filter");
    System.out.printf("Solo USD: %s\n", onlyDollars);

    List<MonetaryAmount> euroAndDollar =
        amounts
            .stream()
            .filter(MonetaryFunctions.isCurrency(euro, dollar))
            .collect(Collectors.toList());

    System.out.printf("Solo EUR y USD: %s\n", euroAndDollar);

    List<MonetaryAmount> greaterThanTenDollar =
        amounts
            .stream()
            .filter(MonetaryFunctions.isCurrency(dollar))
            .filter(MonetaryFunctions.isGreaterThan(tenDollar))
            .collect(Collectors.toList());

    System.out.printf("Solo USD y mayores que 10: %s\n", greaterThanTenDollar);

    List<MonetaryAmount> sortedByAmount =
        onlyDollars.stream().sorted(MonetaryFunctions.sortNumber()).collect(Collectors.toList());

    System.out.printf("Solo USD y ordenados: %s\n", sortedByAmount);

    // grouping
    Map<CurrencyUnit, List<MonetaryAmount>> groupedByCurrency =
        amounts.stream().collect(MonetaryFunctions.groupByCurrencyUnit());

    System.out.println();
    System.out.println("grouping");
    System.out.printf("Agrupación por divisa: %s\n", groupedByCurrency);

    // reduction
    List<MonetaryAmount> euroAmounts = new ArrayList<>();
    euroAmounts.add(Money.of(7.5, "EUR"));
    euroAmounts.add(Money.of(10, "EUR"));
    euroAmounts.add(Money.of(12, "EUR"));

    Optional<MonetaryAmount> max = euroAmounts.stream().reduce(MonetaryFunctions.max());
    Optional<MonetaryAmount> min = euroAmounts.stream().reduce(MonetaryFunctions.min());
    Optional<MonetaryAmount> sum = euroAmounts.stream().reduce(MonetaryFunctions.sum());

    System.out.println();
    System.out.println("reduction");
    System.out.printf("Máximo %s, mínimo %s, suma %s\n", max.get(), min.get(), sum.get());

    // exchange rates
    ExchangeRateProvider exchangeRateProviderECB =
        MonetaryConversions.getExchangeRateProvider("ECB");
    ExchangeRateProvider exchangeRateProviderOER =
        MonetaryConversions.getExchangeRateProvider("OER");
    ExchangeRate exchangeRateECB = exchangeRateProviderECB.getExchangeRate("USD", "EUR");
    ExchangeRate exchangeRateOER = exchangeRateProviderOER.getExchangeRate("USD", "EUR");

    System.out.println();
    System.out.println("exchange rates");
    System.out.printf(
        "Ratio de conversión de USD a EUR (ECB, European Central Bank): %f\n",
        exchangeRateECB.getFactor().doubleValue());
    System.out.printf(
        "Ratio de conversión de USD a EUR (OER, Open Exchange Rates): %f\n",
        exchangeRateOER.getFactor().doubleValue());

    // conversion
    CurrencyConversion toEuroECB = MonetaryConversions.getConversion("EUR", "ECB");
    CurrencyConversion toEuroOER = MonetaryConversions.getConversion("EUR", "OER");
    MonetaryAmount tenDollarToEuroECB = tenDollar.with(toEuroECB);
    MonetaryAmount tenDollarToEuroOER = tenDollar.with(toEuroOER);

    System.out.println();
    System.out.println("conversion");
    System.out.printf("10 USD son %s EUR (ECB)\n", tenDollarToEuroECB);
    System.out.printf("10 USD son %s EUR (OER)\n", tenDollarToEuroOER);

    // formating
    MonetaryAmountFormat spainFormat = MonetaryFormats.getAmountFormat(new Locale("es", "ES"));
    MonetaryAmountFormat usFormat = MonetaryFormats.getAmountFormat(new Locale("en", "US"));
    MonetaryAmount fiveThousandEuro = Money.of(5000, euro);

    System.out.println();
    System.out.println("formating");
    System.out.printf(
        "Formato de 5000 EUR localizado en España: %s\n", spainFormat.format(fiveThousandEuro));
    System.out.printf(
        "Formato de 5000 EUR localizado en Estados Unidos: %s\n",
        usFormat.format(fiveThousandEuro));

    // parsing
    MonetaryAmount twelvePointFiveEuro = spainFormat.parse("12,50 EUR");

    System.out.println();
    System.out.println("parsing");
    System.out.printf("Analizando «12,50 EUR» es %s\n", spainFormat.format(twelvePointFiveEuro));

    // custom exchange rates provider
    ExchangeRateProvider customExchangeRateProvider =
        MonetaryConversions.getExchangeRateProvider("OER");
    ExchangeRate customExchangeRate = customExchangeRateProvider.getExchangeRate("USD", "EUR");

    System.out.println();
    System.out.println("custom exchange rates");
    System.out.printf(
        "Ratio de conversión de USD a EUR: %f\n", customExchangeRate.getFactor().doubleValue());
  }
 private void doSummary(MonetaryAmount monetaryAmount) {
   min = MonetaryFunctions.min(min, monetaryAmount);
   max = MonetaryFunctions.max(max, monetaryAmount);
   sum = sum.add(monetaryAmount);
   average = sum.divide(++count);
 }