AbstractResourceBundleProvider is an abstract class that provides the basic support for a provider implementation class for ResourceBundleProvider.

Resource bundles can be packaged in one or more named modules, service provider modules. The consumer of the resource bundle is the one calling ResourceBundle#getBundle(String). In order for the consumer module to load a resource bundle "com.example.app.MyResources" provided by another module, it will use the service loader mechanism. A service interface named "com.example.app.spi.MyResourcesProvider" must be defined and a service provider module will provide an implementation class of "com.example.app.spi.MyResourcesProvider" as follows:

import com.example.app.spi.MyResourcesProvider;
class MyResourcesProviderImpl extends AbstractResourceBundleProvider
    implements MyResourcesProvider
{
    public MyResourcesProviderImpl() {
        super("java.properties");
    }
    // this provider maps the resource bundle to per-language package
    protected String toBundleName(String baseName, Locale locale) {
        return "p." + locale.getLanguage() + "." + baseName;
    }

    public ResourceBundle getBundle(String baseName, Locale locale) {
        // this module only provides bundles in French
        if (locale.equals(Locale.FRENCH)) {
             return super.getBundle(baseName, locale);
        }
        // otherwise return null
        return null;
    }
}

Refer to ResourceBundleProvider for details.