public class UserSession2JaloListener implements UserChangeListener, LanguageChangeListener, CurrencyChangeListener
{

	/**
	 * Updates {@link JaloSession} with the new user.
	 *
	 * @see ystorefoundationpackage.webfoundation.SfUserSession.UserChangeListener#performUserChanged(SfUserSession
	 *      userSession, UserBean oldUser, UserBean newUser)
	 */
	public void performUserChanged(final SfUserSession userSession, final UserBean oldUser, final UserBean newUser)
	{
		final User u = getItem(newUser);
		final Map loginProps = new HashMap();
		loginProps.put(LoginProperties.USER_PK, u.getPK());
		//yes, core does an additional PW check although the user is directly given
		loginProps.put(LoginProperties.PASSWORD, u.getPassword());

		//the other way: via login and pw
		//loginProps.put( "user.principal", login );
		//loginProps.put( "user.credentials", password );

		try
		{
			JaloSession.getCurrentSession().transfer(loginProps, false);
		}
		catch (final Exception e)
		{
			throw new WebfoundationException(e);
		}

		if (newUser.isAnonymous())
		{
			JaloSession.getCurrentSession().removeCart();
		}

	}

	/**
	 * Updates {@link JaloSession} with the new currency.
	 *
	 * @see ystorefoundationpackage.webfoundation.SfUserSession.CurrencyChangeListener#performCurrencyChanged(SfUserSession
	 *      userSession, CurrencyBean oldCurrency, CurrencyBean newCurrency)
	 */
	public void performCurrencyChanged(final SfUserSession userSession, final CurrencyBean oldCurrency,
			final CurrencyBean newCurrency)
	{
		final Currency cur = getItem(newCurrency);
		JaloSession.getCurrentSession().getSessionContext().setCurrency(cur);
	}

	/**
	 * Updates {@link JaloSession} with the new language.
	 *
	 * @see ystorefoundationpackage.webfoundation.SfUserSession.LanguageChangeListener#performLanguageChanged(SfUserSession
	 *      userSession, LanguageBean oldLanguage, LanguageBean newLanguage)
	 */
	public void performLanguageChanged(final SfUserSession userSession, final LanguageBean oldLanguage,
			final LanguageBean newLanguage)
	{
		final Language lang = getItem(newLanguage);
		JaloSession.getCurrentSession().getSessionContext().setLanguage(lang);
	}

	private <T> T getItem(final Bean bean)
	{
		return (T) Webfoundation.getInstance().getBeanDAORegistry().getBeanDAO(bean).getSource(bean);
	}

}