I would like to be able to retrieve a string from a message bundle from inside a JSF 2 managed bean. This would be done in situations where the string is used as the summary or details parameter in a FacesMessage
or as the message in a thrown exception.
I want to make sure that the managed bean loads the correct message bundle for the user's locale. It is not clear to me how to do this from a managed bean using JSF API calls.
My configuration is:
NOTE: I did see this similar question, but it depends on features that are unavailable in my configuration
EDIT: I made a mistake in my original question. What I meant to ask was "How can I get a resource bundle string from inside a managed bean"? BalusC gave me the correct answer for what I asked. The solution for what I actually meant to ask is very similar:
public static String getResourceBundleString(
String resourceBundleName,
String resourceBundleKey)
throws MissingResourceException {
FacesContext facesContext = FacesContext.getCurrentInstance();
ResourceBundle bundle =
facesContext.getApplication().getResourceBundle(
facesContext, resourceBundleName);
return bundle.getString(resourceBundleKey);
}
Also, here is a link to another question that explains the difference between "message" bundles and "resource" bundles.
You can get the full qualified bundle name of <message-bundle>
by Application#getMessageBundle()
. You can get the current locale by UIViewRoot#getLocale()
. You can get a ResourceBundle
out of a full qualified bundle
name and the locale by ResourceBundle#getBundle()
.
So, summarized:
FacesContext facesContext = FacesContext.getCurrentInstance();
String messageBundleName = facesContext.getApplication().getMessageBundle();
Locale locale = facesContext.getViewRoot().getLocale();
ResourceBundle bundle = ResourceBundle.getBundle(messageBundleName, locale);
// ...
Update: as per the mistake in the question, you actually want to get the bundle which is identified by the <base-name>
of <resource-bundle>
. This is unfortunately not directly available by a standard JSF API. You've either to hardcode the same base name in the code and substitute the messageBundleName
in the above example with it, or to inject it as a managed property on <var>
in a request scoped bean:
@ManagedProperty("#{msg}")
private ResourceBundle bundle; // +setter