/*
 * ExchangeRateTable.java
 *
 * Created on: 27-Feb-2010
 *
 */

package netukar.exchange;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 *
 * The exchange rate values are referred to Euro.
 *
 * The exchange rate values were taken from http://www.kb.cz/NASA/rateList/SRVRate
 * 27-Feb-2010.
 *
 *
 * @author radovan
 */
public class ExchangeRateTable {

    private static final ExchangeRateTable instance = new ExchangeRateTable();

    public static ExchangeRateTable getInstance() {
        return instance;
    }


    private Map<Currency, Double> table;



    /**
     * Creates a new instance of ExchangeRateTable.
     */
    private ExchangeRateTable() {
        table = new LinkedHashMap<Currency, Double>();
        table.put(Currency.EUR, 1.0);
        table.put(Currency.CZK, 25.376);
        table.put(Currency.SEK, 9.2176);
        table.put(Currency.NOK, 7.6572);
        table.put(Currency.USD, 1.3027);
        table.put(Currency.JPY, 114.3578);
    }


    public double getExchangeRate(Currency in, Currency out) {
        double referredCurrencyRate = 1 / table.get(in);
        return referredCurrencyRate * table.get(out);
    }

    public Currency[] getAvailableCurrencies() {
        return table.keySet().toArray(new Currency[0]);
    }

}