clime.messadmin.providers.locale.KnownLocations Maven / Gradle / Ivy
/**
*
*/
package clime.messadmin.providers.locale;
import java.util.Locale;
import javax.servlet.http.HttpSession;
import clime.messadmin.providers.spi.LocaleProvider;
/**
* Search "known locations" for java.util.Locale
* IMPLEMENTATION NOTE: this provider has explicit support for Struts 1.x and Spring
* JSF checks the browser meta tag "accept languages" to choose what langage to display.
* @author Cédrik LIME
*/
public class KnownLocations implements LocaleProvider {
/**
* The session attributes key under which the user's selected
* java.util.Locale is stored, if any.
*/
// org.apache.struts.Globals.LOCALE_KEY
private static final String STRUTS_LOCALE_KEY = "org.apache.struts.action.LOCALE";//$NON-NLS-1$
// javax.servlet.jsp.jstl.core.Config.FMT_LOCALE
private static final String JSTL_LOCALE_KEY = "javax.servlet.jsp.jstl.fmt.locale";//$NON-NLS-1$
// org.springframework.web.servlet.i18n.SessionLocaleResolver.LOCALE_SESSION_ATTRIBUTE_NAME
private static final String SPRING_LOCALE_KEY = "org.springframework.web.servlet.i18n.SessionLocaleResolver.LOCALE";//$NON-NLS-1$
/**
* Lower and upper-case strings will be dynamically generated. Put mid-capitalised strings here!
*/
private static final String[] LOCALE_TEST_ATTRIBUTES = new String[] {
STRUTS_LOCALE_KEY, SPRING_LOCALE_KEY, JSTL_LOCALE_KEY, "Locale", "java.util.Locale" };
/**
*
*/
public KnownLocations() {
super();
}
/**
* {@inheritDoc}
*/
public int getPriority() {
return 10;
}
/**
* {@inheritDoc}
*/
public Locale guessLocaleFromSession(HttpSession httpSession) {
Locale locale = null;
for (int i = 0; i < LOCALE_TEST_ATTRIBUTES.length; ++i) {
Object obj = httpSession.getAttribute(LOCALE_TEST_ATTRIBUTES[i]);
if (null != obj && obj instanceof Locale) {
locale = (Locale) obj;
break;
}
obj = httpSession.getAttribute(LOCALE_TEST_ATTRIBUTES[i].toLowerCase());
if (null != obj && obj instanceof Locale) {
locale = (Locale) obj;
break;
}
obj = httpSession.getAttribute(LOCALE_TEST_ATTRIBUTES[i].toUpperCase());
if (null != obj && obj instanceof Locale) {
locale = (Locale) obj;
break;
}
}
return locale;
}
}