package org.apidesign.apifest08.currency;

 import java.math.BigDecimal;

 import java.util.Date;

 /**

  * Exchange rate provider - can provide fixed exchange rate which does not depend

  * on date (method {@link #getExchangeRate()} ) or exchange rate based on date (method {@link #getExchangeRate(java.util.Date) }).

  * 

  * 

  * @author arnostvalicek

  */

 public class ExchangeRateProvider {

     BigDecimal fromValue, toValue;

     ConvertorCurrency fromCurrency, toCurrency;

     /**

      * Simple constructor for <code>ExchangeRateProviderM</code> which can provide fixed exchange rate.

      * 

      * Describes conversion <em>from</em> to <em>to</em> currency.

      * 

      * @param fromValue From value. BigDecimal value, precision should be set to currency precision.

      * @param fromCurrency From currency.

      * @param toValue To value. BigDecimal value, precision should be set to currency precision.

      * @param toCurrency To currency.

      */

     public ExchangeRateProvider(BigDecimal fromValue, ConvertorCurrency fromCurrency, BigDecimal toValue, ConvertorCurrency toCurrency) {

         this.fromValue = fromValue;

         this.toValue = toValue;

         this.fromCurrency = fromCurrency;

         this.toCurrency = toCurrency;

     }

     /**

      * Get fixed exange rate for currencies (from->to).

      * @return Returns exchange rate.

      */

     public ExchangeRate getExchangeRate() {

         return new ExchangeRate(fromValue, toValue);

     }

     /**

      * Get exchange rate for currencies (from->to) based on provided date.

      * @param date Date for which exchange rate should be provided.

      * @return Returns exchange rate 

      */

     public ExchangeRate getExchangeRate(Date date) {

         return new ExchangeRate(fromValue, toValue);

     }

     ConvertorCurrency getFromCurrency() {

         return fromCurrency;

     }

     ConvertorCurrency getToCurrency() {

         return toCurrency;

     }

 }