public DirectConfigurationCredentialStoreImpl(Map<String, String> subjectInfo,
    ClassLoader cl) throws DeploymentException, ClassNotFoundException, NoSuchMethodException, IllegalAccessException, InvocationTargetException, InstantiationException 
{
        if (cl == null) {
            cl = getClass().getClassLoader();
        }
        for (Map.Entry< String, Map< String, Map< String, String > > > realmEntry: subjectInfo.entrySet()) {
            Map< String, Subject > realm = new HashMap< String, Subject >();
            for (Map.Entry< String, Map< String, String > > subjectEntry: realmEntry.getValue().entrySet()) {
                String id = subjectEntry.getKey();
                Map< String, String > principals = subjectEntry.getValue();
                Subject subject = new Subject();
                for (Map.Entry< String, String > principalInfo: principals.entrySet()) {
                    String className = principalInfo.getKey();
                    String principalName = principalInfo.getValue();
                    Class< ? extends Principal > clazz = (Class< ? extends Principal >) cl.loadClass(className);
                    Constructor< ? extends Principal > c = clazz.getConstructor(new Class[] {String.class});
                    Principal p = c.newInstance(new Object[] {principalName});
                    subject.getPrincipals().add(p);
                }
                realm.put(id, subject);
            }
            subjectStore.put(realmEntry.getKey(), realm);
        }
}

 public static GBeanInfo getGBeanInfo() 
{
        return GBEAN_INFO;
}

 public Subject getSubject(String realm,
    String id) throws LoginException 
{
        Map< String, Subject > realmMap = subjectStore.get(realm);
        if (realmMap == null) {
            throw new LoginException("Unknown realm : " + realm);
        }
        Subject subject = realmMap.get(id);
        if (subject == null) {
            throw new LoginException("Unknown id: " + id + " in realm: " + realm);
        }
        return subject;
}