Dynamic locale switching in a JSF app?

Question

I have an application where the user can dynamically switch between locales from the welcome page of my application. I see that the earlier developer (inherited the code without much documentation) has overridden the following three methods from ViewHandler and tells me that this is required for dynamic switching of the Locale...any help is highly appreciated

Also, do let me know if there is a better way of handling this

public Locale calculateLocale(FacesContext facescontext)
{
    Locale userLocale = LocaleManager.getInstance().getCurrentLocale();
    if (userLocale != null)
    {
        return userLocale;
    }
    else
    {
        return delegate.calculateLocale(facescontext);
    }
}

public void renderView(FacesContext facescontext, UIViewRoot uiviewroot)
        throws IOException, FacesException {
    uiviewroot.setLocale(LocaleManager.getInstance().getCurrentLocale());
    delegate.renderView(facescontext, uiviewroot);
}
public UIViewRoot createView(FacesContext facescontext, String s)
{
    UIViewRoot view = delegate.createView(facescontext, s);
    view.setLocale(LocaleManager.getInstance().getCurrentLocale());
    return view;
}

Answer 1

My solution is:

• have a session-scoped managed-bean that holds a Locale instance

• have the the following button (or link) for each supported language:

  <h:commandButton action="#{localeBean.changeLocal}">
       <f:setPropertyActionListener target="#{localeBean.selectedLanguage}" 
                value="en" />
  </h:commandButton>
  

• set the current locale based on the passed language (new Locale(lang))

• in your template(s) use <f:view locale="#{localeBean.currentLocale}">