package org.apidesign.apifest08.currency;

 /**

  * Exchange rate provider.

  * 

  * @author ked

  * @see http://wiki.apidesign.org/wiki/APIDesignPatterns:ResponseReply

  */

 public interface ExchangeRateProvider<AmountType, IdentifierType> {

     public void getExchangeRate(

             ExchangeRateRequest<AmountType, IdentifierType> request,

             ExchangeRateResponse<AmountType, IdentifierType> response);

     public final class ExchangeRateRequest<AmountType, IdentifierType> {

         private IdentifierType currencyAIdentifier;

         private IdentifierType currencyBIdentifier;

         ExchangeRateRequest() {

         }

         public IdentifierType getCurrencyAIdentifier() {

             return currencyAIdentifier;

         }

         void setCurrencyAIdentifier(IdentifierType currencyAIdentifier) {

             this.currencyAIdentifier = currencyAIdentifier;

         }

         public IdentifierType getCurrencyBIdentifier() {

             return currencyBIdentifier;

         }

         void setCurrencyBIdentifier(IdentifierType currencyBIdentifier) {

             this.currencyBIdentifier = currencyBIdentifier;

         }

     }

     public final class ExchangeRateResponse<AmountType, IdentifierType> {

         private ExchangeRateValue<AmountType, IdentifierType> exchangeRate;

         ExchangeRateResponse() {

         }

         ExchangeRateValue<AmountType, IdentifierType> getExchangeRate() {

             return exchangeRate;

         }

         public void setExchangeRate(ExchangeRateValue<AmountType, IdentifierType> exchangeRate) {

             this.exchangeRate = exchangeRate;

         }

     }

 }