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;

    }

}