ingo@1022: /*
ingo@1022:  * Copyright (c) 2010 by Intevation GmbH
ingo@1022:  *
ingo@1022:  * This program is free software under the LGPL (>=v2.1)
ingo@1022:  * Read the file LGPL.txt coming with the software for details
ingo@1022:  * or visit http://www.gnu.org/licenses/ if it does not exist.
ingo@1022:  */
ingo@1022: 
ingo@706: package de.intevation.gnv.action;
ingo@706: 
ingo@706: import de.intevation.gnv.action.sessionmodel.SessionModel;
ingo@706: import de.intevation.gnv.action.sessionmodel.SessionModelFactory;
ingo@965: import de.intevation.gnv.artifactdatabase.objects.ArtifactObject;
ingo@706: 
ingo@706: import java.util.Locale;
ingo@706: 
ingo@706: import javax.servlet.http.HttpServletRequest;
ingo@706: import javax.servlet.http.HttpServletResponse;
ingo@706: 
ingo@706: import org.apache.log4j.Logger;
ingo@706: 
ingo@965: import org.apache.struts.Globals;
ingo@706: import org.apache.struts.action.ActionForm;
ingo@706: import org.apache.struts.action.ActionForward;
ingo@706: import org.apache.struts.action.ActionMapping;
ingo@706: 
ingo@706: /**
ingo@706:  * Toggle the current language used to create the user interface. Two
ingo@706:  * languages are available now - german and english.
ingo@706:  *
ingo@706:  * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
ingo@706:  */
ingo@706: public class SwitchLanguageAction extends DescribeUIAction {
ingo@706: 
ingo@706:     public static Logger logger = Logger.getLogger(SwitchLanguageAction.class);
ingo@706: 
ingo@706:     @Override
ingo@706:     public ActionForward execute(
ingo@706:         ActionMapping       mapping,
ingo@706:         ActionForm          form,
ingo@706:         HttpServletRequest  request,
ingo@706:         HttpServletResponse response
ingo@706:     ) throws Exception
ingo@706:     {
ingo@991:         if (isSessionExhausted(request)) {
ingo@991:             return sessionExhaustedForward(mapping, form, request, response);
ingo@991:         }
ingo@991: 
ingo@706:         SessionModelFactory factory = SessionModelFactory.getInstance();
ingo@706:         SessionModel        sm      = factory.getSessionModel(request);
ingo@965:         Locale locale               = switchLanguage(sm.getCurrentLocale());
ingo@706: 
ingo@965:         sm.setCurrentLocale(locale);
ingo@965:         ArtifactObject artifactFactory = sm.getSelectedArtifactFactory();
ingo@965: 
ingo@965:         if (artifactFactory == null) {
ingo@965:             request.getSession().setAttribute(Globals.LOCALE_KEY, locale);
ingo@965:             return mapping.findForward(SUCCSESS_FORWARD_ID);
ingo@965:         }
ingo@706: 
ingo@706:         return super.execute(mapping, form, request, response);
ingo@706:     }
ingo@706: 
ingo@706: 
ingo@706:     /**
ingo@706:      * This method toggles between german and english language.
ingo@706:      *
ingo@706:      * @param currentLocale The locale which is currently used.
ingo@706:      * @return an english locale, if the current locale is german - otherwise
ingo@706:      * a german locale.
ingo@706:      */
ingo@706:     protected Locale switchLanguage(Locale currentLocale) {
ingo@706:         if (currentLocale.getLanguage().equals(Locale.GERMAN.getLanguage())) {
ingo@706:             logger.info("Switch from german to english locale.");
ingo@706:             return Locale.ENGLISH;
ingo@706:         }
ingo@706:         else {
ingo@706:             logger.info("Switch from english to german locale.");
ingo@706:             return Locale.GERMAN;
ingo@706:         }
ingo@706:     }
ingo@706: }
ingo@706: // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf-8 :