japod@55: package org.apidesign.apifest08.currency;
japod@55: 
japod@55: import java.util.Currency;
japod@55: 
japod@55: 
japod@55: /**
japod@55:  * Used to look up the exchange rate between two currencies.
japod@55:  *
japod@55:  * @author D'Arcy Smith
japod@55:  * @version 1.0
japod@55:  */
japod@55: public interface ExchangeRateFinder
japod@55: {
japod@55:     /**
japod@55:      * Find the exchange rate between two currencies.
japod@55:      *
japod@55:      * @param a the currency to convert from.
japod@55:      * @param b the currency to convert to.
japod@55:      * @return the exchange rate for conversions between the two currencies.
japod@55:      */
japod@55:     ExchangeRate findRate(Currency a, Currency b);
japod@55: }