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;

        }

    }

}