Java Currency Name Get countryFlagForCurrency(String c)

Description

country Flag For Currency

License

Open Source License

Declaration

public static String countryFlagForCurrency(String c) 

Method Source Code

//package com.java2s;
/**//  w  w w .j  ava2  s .  c o  m
 * Copyright (C) 2015 Yoann Manvieu
 *
 * This software is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by the
 * Free Software Foundation, either version 3 of the License, or (at your
 * option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import java.util.ArrayList;
import java.util.Currency;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Set;

public class Main {
    public static final String EUR = "EUR";
    public static final String USD = "USD";
    private static final Map<String, String> COMMODITIES = new HashMap<>();

    public static String countryFlagForCurrency(String c) {
        if (EUR.equals(c)) {
            return "europeanunion";
        } else if (USD.equals(c)) {
            return "us";
        }

        String commodityCode = COMMODITIES.get(c);

        if (commodityCode != null) {
            return commodityCode;
        }

        List<String> codes = countryCodesForCurrency(c);

        if (!codes.isEmpty()) {
            String code = codes.get(0);
            return code.toLowerCase();
        }

        return null;
    }

    private static List<String> countryCodesForCurrency(String currency) {
        Set<String> codes = new HashSet<>();

        if (currencyFromCode(currency) != null) {
            for (Locale l : Locale.getAvailableLocales()) {
                try {
                    Currency currentCurrency = Currency.getInstance(l);

                    if (currentCurrency != null && currentCurrency.getCurrencyCode().equals(currency)) {
                        codes.add(l.getCountry());
                    }
                } catch (IllegalArgumentException e) {
                }
            }
        }

        return new ArrayList<>(codes);
    }

    private static Currency currencyFromCode(String currency) {
        try {
            return Currency.getInstance(currency);
        } catch (IllegalArgumentException e) {
            return null;
        }
    }
}

Related

1. getDefaultCurrency()
2. getLocalSymbol(Currency currency)
3. nameForCurrency(String currency)
4. printCurrency(Currency value)