Supported Locales java

SupportedLocales.java

import org.springframework.context.i18n.LocaleContextHolder;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;

public class SupportedLocales {

    private static final Map<String,Locale> LOCALE_LIST = new HashMap<>();

    public static final Locale ENGLISH = Locale.ENGLISH;
    public static final Locale DUTCH = new Locale("nl");

    static {
        LOCALE_LIST.put("en", ENGLISH);
        LOCALE_LIST.put("nl", DUTCH);
    }

    private SupportedLocales() {
        throw new UnsupportedOperationException("Constructor for this class is not supported.");
    }

    public static Locale getLocale() {
        Locale localeFromContext = LocaleContextHolder.getLocale();
        return LOCALE_LIST.containsKey(localeFromContext.getLanguage()) ? localeFromContext : ENGLISH;
    }

    public static Locale getDefault() {
        return ENGLISH;
    }

    public static List<Locale> getSupportedLocales() {
        return new ArrayList<>(LOCALE_LIST.values());
    }

    public static Locale get(final String languageCode){
        final Locale locale = LOCALE_LIST.get(languageCode);
        if(locale == null){
            throw new UnsupportedLocaleException(languageCode);
        }
        return locale;
    }

}