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duminică, 15 martie 2015

[OmniFaces utilities (2.0)] Get the application resource bundle programmatically

[OmniFaces utilities] The getResourceBundle() method returns the application resource bundle as identified by the given <var> of the <resource-bundle> in faces-config.xml. If there is no <resource-bundle> with the given <var>, then this method just returns null.

See also: Faces#getContext()

Note Do not confuse the <resource-bundle> tag with <message-bundle>. The former is used for registering custom localized static text, while the latter is used for registering custom error/info/warn messages, which are displayed by <h:message> and <h:messages>.It can be used to override the JSF default warning/error messages.


This method is a shortcut for Application#getResourceBundle(FacesContext, String). For example, you can use it as quick solution for programmatically choose the proper entry depending on current locale. Suppose that you have the following resource bundle configuration in faces-config.xml:


Each PlayerMessages file contains a key named HELLO, as below:
HELLO = Hello!
HELLO = Bonjour!
HELLO = Hallo dort!

Further, we set the locale as fr via <f:view>, or programmatically, via Faces#setLocale().

<f:view locale="fr">...<f:view/>     


import org.omnifaces.util.Faces;
Locale frlocale = new Locale("fr");

Now, in page you can write #{msg['HELLO']}, or you can use OmniFaces shortcut in a managed bean (or other JSF artifact) to programmatically have access to the HELLO key depending on locale:

import org.omnifaces.util.Faces;
ResourceBundle rb = Faces.getResourceBundle("msg");
// do something with rb.getString("HELLO"); which returns, Bonjour!, in this case

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