How to set resource bundle "On-The-Fly"? - xpages

Question

I have a combobox where users can select an available language. The application contains properties files for each language.
In the resources section of the page the resource bundle is calculates according to a language tag ( DE, EN ... ) in a user config document.
Is there any easy way to change the language in the onChange event according to the value of the combobox? I thought of context.setProperty(???).
Any suggestion?

Answer 1

To implement this application wide you could use a phase listener. In this example, the locale to use is stored in a sessionScope variable named "Language".
Just add a combobox to your XPage(s) containing all allowed locales.
<xp:comboBox id="comboBox1" value="#{sessionScope.Language}">
<xp:selectItem itemLabel="Chinese" itemValue="zh"></xp:selectItem>
<xp:selectItem itemLabel="German" itemValue="de"></xp:selectItem>
<xp:selectItem itemLabel="Turkish" itemValue="tr"></xp:selectItem>
<xp:eventHandler event="onchange" submit="true" refreshMode="complete" />
</xp:comboBox>
Then you have to use a phase listener like this one:
package ch.hasselba.xpages.jsf.core;
import javax.faces.context.FacesContext;
import javax.faces.application.Application;
import javax.faces.event.PhaseEvent;
import javax.faces.event.PhaseId;
import javax.faces.event.PhaseListener;
import javax.faces.component.UIViewRoot;
import java.util.Locale;
import java.util.Map;
public class LocalizationSetter implements PhaseListener {
private static final long serialVersionUID = -1L;
private static final String scopeVarName = "Language";
private static final String scopeName = "sessionScope";
public void afterPhase(PhaseEvent event) {}
public void beforePhase(PhaseEvent event) {
FacesContext facesContext = event.getFacesContext();
UIViewRoot view = facesContext.getViewRoot();
view.setLocale( getLanguage(facesContext) ) ;
}
public PhaseId getPhaseId() {
return PhaseId.RENDER_RESPONSE;
}
private Locale getLanguage( FacesContext facesContext ){
try{
Application app = facesContext.getApplication();
Object obj = app.getVariableResolver().resolveVariable(facesContext, scopeName );
Object lang = ((Map) obj).get( scopeVarName );
if( lang != null ){
return new Locale((String) lang);
}
}catch(Exception e){}
return Locale.getDefault();
}
}
You can add lookups / etc. to access the user profiles in the "getLanguag()" method.
Hope this helps
Sven

Answer 2

I have hade some struggle with this in the past and have still not solved it correctly.
you can set the language using
context.setLocaleString("en");
context.reloadPage();
but if you want the language to be changed depending on a user document I think you need to add the code to each beforePageLoad event you have. because the browser will always use the setting you have in the html lang=".." The resource bundle will also use the language in this setting
I have some problems with getting it to work without manual reload or reload twice.
You can also try to change the lang attribute using the phaselistener