EDIT

package eu.etaxonomy.cdm.remote.l10n;

import java.util.Enumeration;

import java.util.Hashtable;

import java.util.List;

import java.util.Locale;

import java.util.Vector;

import org.hibernate.HibernateException;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Component;

import eu.etaxonomy.cdm.api.service.ITermService;

import eu.etaxonomy.cdm.model.common.Language;

@Component

public class LocaleContext {

	protected static ThreadLocal<Vector<Locale>> localesHolder = new ThreadLocal<Vector<Locale>>(){

		@Override

		protected Vector<Locale> initialValue() {

			return new Vector<Locale>();

		}

	};

	protected static Hashtable<String, List<Language>> languageMap = new Hashtable<String, List<Language>>();

	private ITermService termService;

	@Autowired

	public void setTermService(ITermService termService) {

		this.termService = termService;

	}

	public void setLocales(Enumeration<Locale> locales) {

		Vector<Locale> l = new Vector<Locale>();

		while(locales.hasMoreElements()){

			l.add(locales.nextElement());

		}

		LocaleContext.localesHolder.set(l);

		mapToLanguages(l);

	}

	public static Enumeration<Locale> getLocales(){

		return localesHolder.get().elements();

	}

	/**

	 *

	 * @return

	 */

	public static List<Language> getLanguages(){

		String localesKey = composeLocalesKey(getLocales());

		return languageMap.get(localesKey);

	}

	private void mapToLanguages(Vector<Locale> locales) {

		String localesKey = composeLocalesKey(locales.elements());

		try {

            if (!languageMap.containsKey(localesKey)) {

                List<Language> languages = termService.getLanguagesByLocale(locales.elements());

                languageMap.put(localesKey, languages);

            }

        } catch (HibernateException e) {

            System.err.println("DEBUG: " + Thread.currentThread());

            e.printStackTrace(System.err);

        }

	}

	private static String composeLocalesKey(Enumeration<Locale> locales) {

		String localesKey = "";

		while(locales.hasMoreElements()){

			localesKey += locales.nextElement() + ",";

		}

		return localesKey;

	}

}