Referencing values from ValidationMessages.properties

I've got a ValidationMessages.properties file that I need to reference a value from a managed bean.

This is the mb:

Code :

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public class ButtonBean implements Serializable {
 
    public void save(ActionEvent actionEvent) {
        addMessage(???????HOW DO I GET THIS VALUE FROM THE ValidationMessages.properties FILE???????);
    }
 
    public void update(ActionEvent actionEvent) {
        addMessage("Data updated");
    }
 
    public void delete(ActionEvent actionEvent) {
        addMessage("Data deleted");
    }
 
    public void addMessage(String summary) {
        FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, summary, null);
        FacesContext.getCurrentInstance().addMessage(null, message);
    }
}

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Getting the value in the JSF page is no probs but I can't figure out how to get it from inside the method. Anybody got any ideas?

Just to clarify I was trying to extract string from my resource bundle and insert it into the managed bean directly. The solution that I came up with is probably not the most elegant and any improvements would be very welcome.

Code :

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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);
}

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You can then reference the method with the name of your bundle as set in your faces-config.xml file and the name of the key for the specific string.