javax.servlet.jsp.jstl.core.Config Java Examples

/**
 * Checks JSTL's "javax.servlet.jsp.jstl.fmt.localizationContext"
 * context-param and creates a corresponding child message source,
 * with the provided Spring-defined MessageSource as parent.
 * @param servletContext the ServletContext we're running in
 * (to check JSTL-related context-params in {@code web.xml})
 * @param messageSource the MessageSource to expose, typically
 * the ApplicationContext of the current DispatcherServlet
 * @return the MessageSource to expose to JSTL; first checking the
 * JSTL-defined bundle, then the Spring-defined MessageSource
 * @see org.springframework.context.ApplicationContext
 */
public static MessageSource getJstlAwareMessageSource(
		@Nullable ServletContext servletContext, MessageSource messageSource) {

	if (servletContext != null) {
		String jstlInitParam = servletContext.getInitParameter(Config.FMT_LOCALIZATION_CONTEXT);
		if (jstlInitParam != null) {
			// Create a ResourceBundleMessageSource for the specified resource bundle
			// basename in the JSTL context-param in web.xml, wiring it with the given
			// Spring-defined MessageSource as parent.
			ResourceBundleMessageSource jstlBundleWrapper = new ResourceBundleMessageSource();
			jstlBundleWrapper.setBasename(jstlInitParam);
			jstlBundleWrapper.setParentMessageSource(messageSource);
			return jstlBundleWrapper;
		}
	}
	return messageSource;
}
 

/**
 * Checks JSTL's "javax.servlet.jsp.jstl.fmt.localizationContext"
 * context-param and creates a corresponding child message source,
 * with the provided Spring-defined MessageSource as parent.
 * @param servletContext the ServletContext we're running in
 * (to check JSTL-related context-params in {@code web.xml})
 * @param messageSource the MessageSource to expose, typically
 * the ApplicationContext of the current DispatcherServlet
 * @return the MessageSource to expose to JSTL; first checking the
 * JSTL-defined bundle, then the Spring-defined MessageSource
 * @see org.springframework.context.ApplicationContext
 */
public static MessageSource getJstlAwareMessageSource(
		ServletContext servletContext, MessageSource messageSource) {

	if (servletContext != null) {
		String jstlInitParam = servletContext.getInitParameter(Config.FMT_LOCALIZATION_CONTEXT);
		if (jstlInitParam != null) {
			// Create a ResourceBundleMessageSource for the specified resource bundle
			// basename in the JSTL context-param in web.xml, wiring it with the given
			// Spring-defined MessageSource as parent.
			ResourceBundleMessageSource jstlBundleWrapper = new ResourceBundleMessageSource();
			jstlBundleWrapper.setBasename(jstlInitParam);
			jstlBundleWrapper.setParentMessageSource(messageSource);
			return jstlBundleWrapper;
		}
	}
	return messageSource;
}
 

private void setTimeZone(Context ctx, User user, HttpServletRequest request) {
    RhnTimeZone tz = null;
    if (user != null) {
        tz = user.getTimeZone();
        LOG.debug("Set timezone from the user.");
    }
    if (tz == null) {
        // Use the Appserver timezone if the User doesn't have one.
        String olsonName = TimeZone.getDefault().getID();
        if (LOG.isDebugEnabled()) {
            LOG.debug("olson name [" + olsonName + "]");
        }
        tz = UserManager.getTimeZone(olsonName);
        // if we're still null set it to a default
        if (tz == null) {
            tz = new RhnTimeZone();
            tz.setOlsonName(olsonName);

            LOG.debug("timezone still null");
        }
    }
    ctx.setTimezone(tz.getTimeZone());
    // Set the timezone on the request so that fmt:formatDate
    // can find it
    Config.set(request, Config.FMT_TIME_ZONE, tz.getTimeZone());
}
 

/**
 * Looks up a configuration variable in the request, session and application scopes. If none is found, return by
 * {@link ServletContext#getInitParameter(String)} method.
 */
private Object findByKey(String key) {
	Object value = Config.get(request, key);
	if (value != null) {
		return value;
	}

	value = Config.get(request.getSession(createNewSession()), key);
	if (value != null) {
		return value;
	}

	value = Config.get(request.getServletContext(), key);
	if (value != null) {
		return value;
	}

	return request.getServletContext().getInitParameter(key);
}
 

private void setTimeZone(Context ctx, User user, HttpServletRequest request) {
    RhnTimeZone tz = null;
    if (user != null) {
        tz = user.getTimeZone();
        LOG.debug("Set timezone from the user.");
    }
    if (tz == null) {
        // Use the Appserver timezone if the User doesn't have one.
        String olsonName = TimeZone.getDefault().getID();
        if (LOG.isDebugEnabled()) {
            LOG.debug("olson name [" + olsonName + "]");
        }
        tz = UserManager.getTimeZone(olsonName);
        // if we're still null set it to a default
        if (tz == null) {
            tz = new RhnTimeZone();
            tz.setOlsonName(olsonName);

            LOG.debug("timezone still null");
        }
    }
    ctx.setTimezone(tz.getTimeZone());
    // Set the timezone on the request so that fmt:formatDate
    // can find it
    Config.set(request, Config.FMT_TIME_ZONE, tz.getTimeZone());
}
 

/** HttpSessionListener interface */
   @Override
   public void sessionCreated(HttpSessionEvent sessionEvent) {
if (sessionEvent == null) {
    return;
}
HttpSession session = sessionEvent.getSession();
session.setMaxInactiveInterval(Configuration.getAsInt(ConfigurationKeys.INACTIVE_TIME));

//set server default locale for STURTS and JSTL. This value should be overwrite
//LocaleFilter class. But this part code can cope with login.jsp Locale.
if (session != null) {
    String defaults[] = LanguageUtil.getDefaultLangCountry();
    Locale preferredLocale = new Locale(defaults[0] == null ? "" : defaults[0],
	    defaults[1] == null ? "" : defaults[1]);
    session.setAttribute(LocaleFilter.PREFERRED_LOCALE_KEY, preferredLocale);
    Config.set(session, Config.FMT_LOCALE, preferredLocale);
}
   }
 

/**
 * Checks JSTL's "javax.servlet.jsp.jstl.fmt.localizationContext"
 * context-param and creates a corresponding child message source,
 * with the provided Spring-defined MessageSource as parent.
 * @param servletContext the ServletContext we're running in
 * (to check JSTL-related context-params in {@code web.xml})
 * @param messageSource the MessageSource to expose, typically
 * the ApplicationContext of the current DispatcherServlet
 * @return the MessageSource to expose to JSTL; first checking the
 * JSTL-defined bundle, then the Spring-defined MessageSource
 * @see org.springframework.context.ApplicationContext
 */
public static MessageSource getJstlAwareMessageSource(
		ServletContext servletContext, MessageSource messageSource) {

	if (servletContext != null) {
		String jstlInitParam = servletContext.getInitParameter(Config.FMT_LOCALIZATION_CONTEXT);
		if (jstlInitParam != null) {
			// Create a ResourceBundleMessageSource for the specified resource bundle
			// basename in the JSTL context-param in web.xml, wiring it with the given
			// Spring-defined MessageSource as parent.
			ResourceBundleMessageSource jstlBundleWrapper = new ResourceBundleMessageSource();
			jstlBundleWrapper.setBasename(jstlInitParam);
			jstlBundleWrapper.setParentMessageSource(messageSource);
			return jstlBundleWrapper;
		}
	}
	return messageSource;
}
 

/**
 * Checks JSTL's "javax.servlet.jsp.jstl.fmt.localizationContext"
 * context-param and creates a corresponding child message source,
 * with the provided Spring-defined MessageSource as parent.
 * @param servletContext the ServletContext we're running in
 * (to check JSTL-related context-params in {@code web.xml})
 * @param messageSource the MessageSource to expose, typically
 * the ApplicationContext of the current DispatcherServlet
 * @return the MessageSource to expose to JSTL; first checking the
 * JSTL-defined bundle, then the Spring-defined MessageSource
 * @see org.springframework.context.ApplicationContext
 */
public static MessageSource getJstlAwareMessageSource(
		@Nullable ServletContext servletContext, MessageSource messageSource) {

	if (servletContext != null) {
		String jstlInitParam = servletContext.getInitParameter(Config.FMT_LOCALIZATION_CONTEXT);
		if (jstlInitParam != null) {
			// Create a ResourceBundleMessageSource for the specified resource bundle
			// basename in the JSTL context-param in web.xml, wiring it with the given
			// Spring-defined MessageSource as parent.
			ResourceBundleMessageSource jstlBundleWrapper = new ResourceBundleMessageSource();
			jstlBundleWrapper.setBasename(jstlInitParam);
			jstlBundleWrapper.setParentMessageSource(messageSource);
			return jstlBundleWrapper;
		}
	}
	return messageSource;
}
 

public static TimeZone getJstlTimeZone(HttpServletRequest request, ServletContext servletContext) {
	Object timeZoneObject = Config.get(request, Config.FMT_TIME_ZONE);
	if (timeZoneObject == null) {
		HttpSession session = request.getSession(false);
		if (session != null) {
			timeZoneObject = Config.get(session, Config.FMT_TIME_ZONE);
		}
		if (timeZoneObject == null && servletContext != null) {
			timeZoneObject = Config.get(servletContext, Config.FMT_TIME_ZONE);
		}
	}
	return (timeZoneObject instanceof TimeZone ? (TimeZone) timeZoneObject : null);
}
 

@Override
public Locale getLocale() {
	HttpSession session = this.request.getSession(false);
	if (session != null) {
		Object localeObject = Config.get(session, Config.FMT_LOCALE);
		if (localeObject instanceof Locale) {
			return (Locale) localeObject;
		}
	}
	return RequestContextUtils.getLocale(this.request);
}
 

public static Locale getJstlLocale(HttpServletRequest request, ServletContext servletContext) {
	Object localeObject = Config.get(request, Config.FMT_LOCALE);
	if (localeObject == null) {
		HttpSession session = request.getSession(false);
		if (session != null) {
			localeObject = Config.get(session, Config.FMT_LOCALE);
		}
		if (localeObject == null && servletContext != null) {
			localeObject = Config.get(servletContext, Config.FMT_LOCALE);
		}
	}
	return (localeObject instanceof Locale ? (Locale) localeObject : null);
}
 

@Override
   public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// Take care about login.jsp locale. At first, get it from client's browser and check whether LAMS 
// supports it. And if not, uses server's default locale.
Locale browserLocale = request.getLocale();
Locale preferredLocale = LanguageUtil.getSupportedLocaleByNameOrLanguageCode(browserLocale);
Config.set(request, Config.FMT_LOCALE, preferredLocale);

request.getRequestDispatcher("/login.jsp").forward(request, response);
   }
 

/**
 * Exposes JSTL-specific request attributes specifying locale
 * and resource bundle for JSTL's formatting and message tags,
 * using Spring's locale and MessageSource.
 * @param request the current HTTP request
 * @param messageSource the MessageSource to expose,
 * typically the current ApplicationContext (may be {@code null})
 * @see #exposeLocalizationContext(RequestContext)
 */
public static void exposeLocalizationContext(HttpServletRequest request, MessageSource messageSource) {
	Locale jstlLocale = RequestContextUtils.getLocale(request);
	Config.set(request, Config.FMT_LOCALE, jstlLocale);
	TimeZone timeZone = RequestContextUtils.getTimeZone(request);
	if (timeZone != null) {
		Config.set(request, Config.FMT_TIME_ZONE, timeZone);
	}
	if (messageSource != null) {
		LocalizationContext jstlContext = new SpringLocalizationContext(messageSource, request);
		Config.set(request, Config.FMT_LOCALIZATION_CONTEXT, jstlContext);
	}
}
 

/**
 * Exposes JSTL-specific request attributes specifying locale
 * and resource bundle for JSTL's formatting and message tags,
 * using Spring's locale and MessageSource.
 * @param requestContext the context for the current HTTP request,
 * including the ApplicationContext to expose as MessageSource
 */
public static void exposeLocalizationContext(RequestContext requestContext) {
	Config.set(requestContext.getRequest(), Config.FMT_LOCALE, requestContext.getLocale());
	TimeZone timeZone = requestContext.getTimeZone();
	if (timeZone != null) {
		Config.set(requestContext.getRequest(), Config.FMT_TIME_ZONE, timeZone);
	}
	MessageSource messageSource = getJstlAwareMessageSource(
			requestContext.getServletContext(), requestContext.getMessageSource());
	LocalizationContext jstlContext = new SpringLocalizationContext(messageSource, requestContext.getRequest());
	Config.set(requestContext.getRequest(), Config.FMT_LOCALIZATION_CONTEXT, jstlContext);
}
 

@Override
public ResourceBundle getResourceBundle() {
	HttpSession session = this.request.getSession(false);
	if (session != null) {
		Object lcObject = Config.get(session, Config.FMT_LOCALIZATION_CONTEXT);
		if (lcObject instanceof LocalizationContext) {
			ResourceBundle lcBundle = ((LocalizationContext) lcObject).getResourceBundle();
			return new MessageSourceResourceBundle(this.messageSource, getLocale(), lcBundle);
		}
	}
	return new MessageSourceResourceBundle(this.messageSource, getLocale());
}
 

@Override
public Locale getLocale() {
	HttpSession session = this.request.getSession(false);
	if (session != null) {
		Object localeObject = Config.get(session, Config.FMT_LOCALE);
		if (localeObject instanceof Locale) {
			return (Locale) localeObject;
		}
	}
	return RequestContextUtils.getLocale(this.request);
}
 

public static Locale getJstlLocale(HttpServletRequest request, ServletContext servletContext) {
	Object localeObject = Config.get(request, Config.FMT_LOCALE);
	if (localeObject == null) {
		HttpSession session = request.getSession(false);
		if (session != null) {
			localeObject = Config.get(session, Config.FMT_LOCALE);
		}
		if (localeObject == null && servletContext != null) {
			localeObject = Config.get(servletContext, Config.FMT_LOCALE);
		}
	}
	return (localeObject instanceof Locale ? (Locale) localeObject : null);
}
 

public static TimeZone getJstlTimeZone(HttpServletRequest request, ServletContext servletContext) {
	Object timeZoneObject = Config.get(request, Config.FMT_TIME_ZONE);
	if (timeZoneObject == null) {
		HttpSession session = request.getSession(false);
		if (session != null) {
			timeZoneObject = Config.get(session, Config.FMT_TIME_ZONE);
		}
		if (timeZoneObject == null && servletContext != null) {
			timeZoneObject = Config.get(servletContext, Config.FMT_TIME_ZONE);
		}
	}
	return (timeZoneObject instanceof TimeZone ? (TimeZone) timeZoneObject : null);
}
 

@Test
public void testInternalResourceViewResolverWithJstl() throws Exception {
	Locale locale = !Locale.GERMAN.equals(Locale.getDefault()) ? Locale.GERMAN : Locale.FRENCH;

	MockServletContext sc = new MockServletContext();
	StaticWebApplicationContext wac = new StaticWebApplicationContext();
	wac.setServletContext(sc);
	wac.addMessage("code1", locale, "messageX");
	wac.refresh();
	InternalResourceViewResolver vr = new InternalResourceViewResolver();
	vr.setViewClass(JstlView.class);
	vr.setApplicationContext(wac);

	View view = vr.resolveViewName("example1", Locale.getDefault());
	assertEquals("Correct view class", JstlView.class, view.getClass());
	assertEquals("Correct URL", "example1", ((JstlView) view).getUrl());

	view = vr.resolveViewName("example2", Locale.getDefault());
	assertEquals("Correct view class", JstlView.class, view.getClass());
	assertEquals("Correct URL", "example2", ((JstlView) view).getUrl());

	MockHttpServletRequest request = new MockHttpServletRequest(sc);
	HttpServletResponse response = new MockHttpServletResponse();
	request.setAttribute(DispatcherServlet.WEB_APPLICATION_CONTEXT_ATTRIBUTE, wac);
	request.setAttribute(DispatcherServlet.LOCALE_RESOLVER_ATTRIBUTE, new FixedLocaleResolver(locale));
	Map model = new HashMap();
	TestBean tb = new TestBean();
	model.put("tb", tb);
	view.render(model, request, response);

	assertTrue("Correct tb attribute", tb.equals(request.getAttribute("tb")));
	assertTrue("Correct rc attribute", request.getAttribute("rc") == null);

	assertEquals(locale, Config.get(request, Config.FMT_LOCALE));
	LocalizationContext lc = (LocalizationContext) Config.get(request, Config.FMT_LOCALIZATION_CONTEXT);
	assertEquals("messageX", lc.getResourceBundle().getString("code1"));
}
 

@Test
public void testInternalResourceViewResolverWithJstlAndContextParam() throws Exception {
	Locale locale = !Locale.GERMAN.equals(Locale.getDefault()) ? Locale.GERMAN : Locale.FRENCH;

	MockServletContext sc = new MockServletContext();
	sc.addInitParameter(Config.FMT_LOCALIZATION_CONTEXT, "org/springframework/web/context/WEB-INF/context-messages");
	StaticWebApplicationContext wac = new StaticWebApplicationContext();
	wac.setServletContext(sc);
	wac.addMessage("code1", locale, "messageX");
	wac.refresh();
	InternalResourceViewResolver vr = new InternalResourceViewResolver();
	vr.setViewClass(JstlView.class);
	vr.setApplicationContext(wac);

	View view = vr.resolveViewName("example1", Locale.getDefault());
	assertEquals("Correct view class", JstlView.class, view.getClass());
	assertEquals("Correct URL", "example1", ((JstlView) view).getUrl());

	view = vr.resolveViewName("example2", Locale.getDefault());
	assertEquals("Correct view class", JstlView.class, view.getClass());
	assertEquals("Correct URL", "example2", ((JstlView) view).getUrl());

	MockHttpServletRequest request = new MockHttpServletRequest(sc);
	HttpServletResponse response = new MockHttpServletResponse();
	request.setAttribute(DispatcherServlet.WEB_APPLICATION_CONTEXT_ATTRIBUTE, wac);
	request.setAttribute(DispatcherServlet.LOCALE_RESOLVER_ATTRIBUTE, new FixedLocaleResolver(locale));
	Map model = new HashMap();
	TestBean tb = new TestBean();
	model.put("tb", tb);
	view.render(model, request, response);

	assertTrue("Correct tb attribute", tb.equals(request.getAttribute("tb")));
	assertTrue("Correct rc attribute", request.getAttribute("rc") == null);

	assertEquals(locale, Config.get(request, Config.FMT_LOCALE));
	LocalizationContext lc = (LocalizationContext) Config.get(request, Config.FMT_LOCALIZATION_CONTEXT);
	assertEquals("message1", lc.getResourceBundle().getString("code1"));
	assertEquals("message2", lc.getResourceBundle().getString("code2"));
}
 

@Override @Produces
public ResourceBundle getBundle(Locale locale) {
	Config.set(request, Config.FMT_LOCALIZATION_CONTEXT, null);
	ResourceBundle customBundle = super.getBundle(locale);
	Config.set(request, Config.FMT_LOCALIZATION_CONTEXT, "mamute-messages");
	ResourceBundle mamuteBundle = super.getBundle(locale);
	
	return new MamuteResourceBundle(customBundle, mamuteBundle);
}
 

/**
 * Ssets the locale context-wide based on a call to {@link JiveGlobals#getLocale()}.
 */
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
        throws IOException, ServletException {
    final String pathInfo = ((HttpServletRequest)request).getPathInfo();

    if (pathInfo == null) {
        // Note, putting the locale in the application at this point is a little overkill
        // (ie, every user who hits this filter will do this). Eventually, it might make
        // sense to just set the locale in the user's session and if that's done we might
        // want to honor a preference to get the user's locale based on request headers.
        // For now, this is just a convenient place to set the locale globally.
        Config.set(context, Config.FMT_LOCALE, JiveGlobals.getLocale());
    }
    else {
        try {
            String[] parts = pathInfo.split("/");
            String pluginName = parts[1];
            ResourceBundle bundle = LocaleUtils.getPluginResourceBundle(pluginName);
            LocalizationContext ctx = new LocalizationContext(bundle, JiveGlobals.getLocale());
            Config.set(request, Config.FMT_LOCALIZATION_CONTEXT, ctx);
        }
        catch (Exception e) {
            // Note, putting the locale in the application at this point is a little overkill
            // (ie, every user who hits this filter will do this). Eventually, it might make
            // sense to just set the locale in the user's session and if that's done we might
            // want to honor a preference to get the user's locale based on request headers.
            // For now, this is just a convenient place to set the locale globally.
            Config.set(context, Config.FMT_LOCALE, JiveGlobals.getLocale());
        }
    }
    // Move along:
    chain.doFilter(request, response);
}
 

@Path("/change-location/{lenguageName}/{country}")
public void changeLocale(String lenguageName , String country , Result result, HttpSession session , HttpServletRequest request ){
    Locale locale = new Locale( lenguageName , country );
    Config.set( session, Config.FMT_FALLBACK_LOCALE, locale);
    Config.set (session, Config.FMT_LOCALE, locale);
    redirectBack(result , request);
}
 

@Test
public void shouldGetLocaleFromRequestFirst() {
	when(request.getAttribute(FMT_LOCALE + ".request")).thenReturn(PT_BR);
	when(session.getAttribute(FMT_LOCALE + ".session")).thenReturn(Locale.ENGLISH);
	when(servletContext.getAttribute(FMT_LOCALE + ".application")).thenReturn(Locale.ENGLISH);
	when(servletContext.getInitParameter(Config.FMT_LOCALE)).thenReturn(Locale.ENGLISH.toString());
	when(request.getLocale()).thenReturn(Locale.ENGLISH);
	assumeThat(Locale.getDefault(), is(Locale.ENGLISH));

	assertThat(localization.getLocale(), equalTo(PT_BR));
}
 

@Test
public void shouldGetLocaleFromSessionWhenNotFoundInRequest() {
	when(session.getAttribute(FMT_LOCALE + ".session")).thenReturn(PT_BR);
	when(servletContext.getAttribute(FMT_LOCALE + ".application")).thenReturn(Locale.ENGLISH);
	when(servletContext.getInitParameter(Config.FMT_LOCALE)).thenReturn(Locale.ENGLISH.toString());
	when(request.getLocale()).thenReturn(Locale.ENGLISH);
	assumeThat(Locale.getDefault(), is(Locale.ENGLISH));

	assertThat(localization.getLocale(), equalTo(PT_BR));
}
 

@Test
public void shouldGetLocaleFromServletContextWhenNotFoundInSession() {
	when(servletContext.getAttribute(FMT_LOCALE + ".application")).thenReturn(PT_BR);
	when(servletContext.getInitParameter(Config.FMT_LOCALE)).thenReturn(Locale.ENGLISH.toString());
	when(request.getLocale()).thenReturn(Locale.ENGLISH);
	assumeThat(Locale.getDefault(), is(Locale.ENGLISH));

	assertThat(localization.getLocale(), equalTo(PT_BR));
}
 

@Test
public void shouldGetLocaleFromInitParameterWhenNotFoundInServletContext() {
	when(servletContext.getInitParameter(Config.FMT_LOCALE)).thenReturn(PT_BR.toString());
	when(request.getLocale()).thenReturn(Locale.ENGLISH);
	assumeThat(Locale.getDefault(), is(Locale.ENGLISH));

	assertThat(localization.getLocale(), equalTo(PT_BR));
}
 

@Test
public void parseLocaleWithLanguageAndCountryAndVariant() {
	when(servletContext.getInitParameter(Config.FMT_LOCALE)).thenReturn("pt_BR_POSIX");
	assertThat(localization.getLocale().getLanguage(), equalTo("pt"));
	assertThat(localization.getLocale().getCountry(), equalTo("BR"));
	assertThat(localization.getLocale().getVariant(), equalTo("POSIX"));
}
 

/**
 * Exposes JSTL-specific request attributes specifying locale
 * and resource bundle for JSTL's formatting and message tags,
 * using Spring's locale and MessageSource.
 * @param requestContext the context for the current HTTP request,
 * including the ApplicationContext to expose as MessageSource
 */
public static void exposeLocalizationContext(RequestContext requestContext) {
	Config.set(requestContext.getRequest(), Config.FMT_LOCALE, requestContext.getLocale());
	TimeZone timeZone = requestContext.getTimeZone();
	if (timeZone != null) {
		Config.set(requestContext.getRequest(), Config.FMT_TIME_ZONE, timeZone);
	}
	MessageSource messageSource = getJstlAwareMessageSource(
			requestContext.getServletContext(), requestContext.getMessageSource());
	LocalizationContext jstlContext = new SpringLocalizationContext(messageSource, requestContext.getRequest());
	Config.set(requestContext.getRequest(), Config.FMT_LOCALIZATION_CONTEXT, jstlContext);
}
 

/**
 * Exposes JSTL-specific request attributes specifying locale
 * and resource bundle for JSTL's formatting and message tags,
 * using Spring's locale and MessageSource.
 * @param request the current HTTP request
 * @param messageSource the MessageSource to expose,
 * typically the current ApplicationContext (may be {@code null})
 * @see #exposeLocalizationContext(RequestContext)
 */
public static void exposeLocalizationContext(HttpServletRequest request, @Nullable MessageSource messageSource) {
	Locale jstlLocale = RequestContextUtils.getLocale(request);
	Config.set(request, Config.FMT_LOCALE, jstlLocale);
	TimeZone timeZone = RequestContextUtils.getTimeZone(request);
	if (timeZone != null) {
		Config.set(request, Config.FMT_TIME_ZONE, timeZone);
	}
	if (messageSource != null) {
		LocalizationContext jstlContext = new SpringLocalizationContext(messageSource, request);
		Config.set(request, Config.FMT_LOCALIZATION_CONTEXT, jstlContext);
	}
}