Using the ExchangeRateProvider

The money-api has a way to use exchange rates: the ExchangeRateProvider interface.

public class ExchangeRateProviderExample1 {

    public static void main(String[] args) {
        CurrencyUnit dollar = Monetary.getCurrency("USD");
        CurrencyUnit real = Monetary.getCurrency("BRL");
        MonetaryAmount money = FastMoney.of(10, dollar);
        MonetaryAmount money2 = FastMoney.of(10, real);
        ExchangeRateProvider provider = MonetaryConversions.getExchangeRateProvider(ExchangeRateType.ECB);
        CurrencyConversion currencyConversion = provider.getCurrencyConversion(dollar);
        MonetaryAmount result = currencyConversion.apply(money2);//value on dollar
        MonetaryAmount monetaryAmount = money.add(result);//result on dollar
    }
}

Moneta has five implementations of ExchangeRateProvider:

• ECB - Is an implementation that retrieves the latest rate from the European Central Bank.
• IMF - Is an implementation that retrieves the latest rate from the International Monetary Fund.
• IMF_HIST - Is an implementation that retrieves the rate of a specific date from the International Monetary Fund.
• ECB_HIST90 - Is an implementation that retrieves the last ninety days of rates from the European Central Bank.
• ECB_HIST - Is an implementation that retrieves all available information since 1999 from the European Central Bank.