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package org.mai.dep810.cer;

import java.math.BigDecimal;
import java.util.Currency;

public class CurrencyExchangeRate {

    BigDecimal rate;
    Currency from;
    Currency to;

    public CurrencyExchangeRate(BigDecimal rate, Currency from, Currency to) {
        this.rate = rate;
        this.from = from;
        this.to = to;
    }

    public Money convert(Money m) {
        if(m.getCurrency().equals(from)) {
            return new Money(to, m.getAmount().multiply(rate));
        } else {
            throw new IncorrectExchangeRateException("Unable to convert currency "+m.getCurrency().getCurrencyCode() + " from "+from.getCurrencyCode());
        }
    }
}