SelectManyMenu

@Named
@RequestScoped
public class SelectManyView {

    private List<String> selectedOptions;
    private List<String> selectedOptions2;
    private List<Country> selectedCountries;
    private List<Country> selectedCountries2;
    private List<Country> countries;

    @Inject
    private CountryService service;

    @PostConstruct
    public void init() {
        countries = service.getCountries();
    }

    public List<String> getSelectedOptions() {
        return selectedOptions;
    }

    public void setSelectedOptions(List<String> selectedOptions) {
        this.selectedOptions = selectedOptions;
    }

    public List<String> getSelectedOptions2() {
        return selectedOptions2;
    }

    public void setSelectedOptions2(List<String> selectedOptions2) {
        this.selectedOptions2 = selectedOptions2;
    }

    public List<Country> getSelectedCountries() {
        return selectedCountries;
    }

    public void setSelectedCountries(List<Country> selectedCountries) {
        this.selectedCountries = selectedCountries;
    }

    public List<Country> getSelectedCountries2() {
        return selectedCountries2;
    }

    public void setSelectedCountries2(List<Country> selectedCountries2) {
        this.selectedCountries2 = selectedCountries2;
    }

    public List<Country> getCountries() {
        return countries;
    }

    public void setCountries(List<Country> countries) {
        this.countries = countries;
    }

    public void setService(CountryService service) {
        this.service = service;
    }
}

@Named
@ApplicationScoped
public class CountryService {

    private List<Country> countries;
    private Map<Integer, Country> countriesAsMap;
    private List<Country> locales;
    private Map<Integer, Country> localesAsMap;

    @PostConstruct
    public void init() {
        countries = new ArrayList<>();
        locales = new ArrayList<>();

        String[] isoCodes = Locale.getISOCountries();

        for (int i = 0; i < isoCodes.length; i++) {
            Locale locale = new Locale("", isoCodes[i]);
            countries.add(new Country(i, locale));
        }

        Collections.sort(countries, (Country c1, Country c2) -> c1.getName().compareTo(c2.getName()));

        int i = 0;
        locales.add(new Country(i++, Locale.US));
        locales.add(new Country(i++, Locale.FRANCE));
        locales.add(new Country(i++, Locale.GERMANY));
        locales.add(new Country(i++, Locale.ITALY));
        locales.add(new Country(i++, Locale.KOREA));
        locales.add(new Country(i++, new Locale("es", "ES")));
        locales.add(new Country(i++, new Locale("ca", "ES")));
        locales.add(new Country(i++, new Locale("nl", "NL")));
        locales.add(new Country(i++, new Locale("pt", "BR")));
        locales.add(new Country(i++, new Locale("pt", "PT")));
        locales.add(new Country(i++, new Locale("ar", "SA"), true));
        locales.add(new Country(i++, new Locale("cs", "CZ")));
        locales.add(new Country(i++, new Locale("el", "GR")));
        locales.add(new Country(i++, new Locale("fa", "IR"), true));
        locales.add(new Country(i++, new Locale("hi", "IN")));
        locales.add(new Country(i++, new Locale("in", "ID")));
        locales.add(new Country(i++, new Locale("hr", "HR")));
        locales.add(new Country(i++, new Locale("hu", "HU")));
        locales.add(new Country(i++, new Locale("iw", "IL"), true));
        locales.add(new Country(i++, new Locale("ka", "GE")));
        locales.add(new Country(i++, new Locale("lt", "LT")));
        locales.add(new Country(i++, new Locale("lv", "LV")));
        locales.add(new Country(i++, new Locale("no", "NO")));
        locales.add(new Country(i++, new Locale("pl", "PL")));
        locales.add(new Country(i++, new Locale("ro", "RO")));
        locales.add(new Country(i++, new Locale("ru", "RU")));
        locales.add(new Country(i++, new Locale("sk", "SK")));
        locales.add(new Country(i++, new Locale("sl", "SI")));
        locales.add(new Country(i++, new Locale("sr", "RS")));
        locales.add(new Country(i++, new Locale("sv", "SE")));
        locales.add(new Country(i++, new Locale("tr", "TR")));
        locales.add(new Country(i++, new Locale("uk", "UA")));
        locales.add(new Country(i++, new Locale("vi", "VN")));
        locales.add(new Country(i++, Locale.SIMPLIFIED_CHINESE));
        locales.add(new Country(i++, Locale.TRADITIONAL_CHINESE));
    }

    public List<Country> getCountries() {
        return new ArrayList<>(countries);
    }

    public Map<Integer, Country> getCountriesAsMap() {
        if (countriesAsMap == null) {
            countriesAsMap = getCountries().stream().collect(Collectors.toMap(Country::getId, country -> country));
        }
        return countriesAsMap;
    }

    public List<Country> getLocales() {
        return new ArrayList<>(locales);
    }

    public Map<Integer, Country> getLocalesAsMap() {
        if (localesAsMap == null) {
            localesAsMap = getLocales().stream().collect(Collectors.toMap(Country::getId, country -> country));
        }
        return localesAsMap;
    }
}

public class Country implements Serializable, Comparable<Country> {

    private int id;
    private String name;
    private String code;
    private Locale locale;
    private boolean rtl;

    public Country() {
    }

    public Country(int id, Locale locale) {
        this(id, locale.getDisplayCountry(), locale.getCountry().toLowerCase(), locale);
    }

    public Country(int id, Locale locale, boolean rtl) {
        this(id, locale.getDisplayCountry(), locale.getCountry().toLowerCase(), locale);
        this.rtl = rtl;
    }

    public Country(int id, String name, String code) {
        this(id, name, code, null);
    }

    public Country(int id, String name, String code, Locale locale) {
        this.id = id;
        this.name = name;
        this.code = code;
        this.locale = locale;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }

    public Locale getLocale() {
        return locale;
    }

    public void setLocale(Locale locale) {
        this.locale = locale;
    }

    public String getLanguage() {
        return locale == null ? "en" : locale.getLanguage();
    }

    public String getDisplayLanguage() {
        return locale == null ? "English" : locale.getDisplayLanguage();
    }

    public boolean isRtl() {
        return rtl;
    }

    public void setRtl(boolean rtl) {
        this.rtl = rtl;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }
        Country country = (Country) o;
        return id == country.id
                && Objects.equals(name, country.name)
                && Objects.equals(code, country.code);
    }

    @Override
    public int hashCode() {
        return Objects.hash(id, name, code);
    }

    @Override
    public String toString() {
        return name;
    }

    @Override
    public int compareTo(Country o) {
        return name.compareTo(o.name);
    }

}