japod@58: package org.apidesign.apifest08.currency;
japod@58: 
japod@58: /**
japod@58:  * Interface for exchange rate engine.
japod@58:  * 
japod@58:  * @author arnostvalicek
japod@58:  */
japod@58: public interface IExchangeRateEngine {
japod@58:     
japod@58:     /**
japod@58:      * Get exchange rate for conversion from <code>fromCurrency</code> to <code>toCurrency</code>.
japod@58:      * 
japod@58:      * @param fromCurrency From currency.
japod@58:      * @param toCurrency To currency.
japod@58:      * @return Returns <code>ExchangeRate</code> if exchange rate is known or <code>null</code> if exchanger rate is not known.
japod@58:      */
japod@58:     public ExchangeRate getExchangeRate(ConvertorCurrency fromCurrency, ConvertorCurrency toCurrency);
japod@58: }