env.put( DirContext.SECURITY_AUTHENTICATION, "simple" );
env.put( DirContext.SECURITY_PRINCIPAL, "uid=admin, ou=system" );
env.put( DirContext.SECURITY_CREDENTIALS, "secret" );
env.put( DirContext.INITIAL_CONTEXT_FACTORY, "org.apache.directory.server.core.jndi.CoreContextFactory" );
env.put( DirectoryService.JNDI_KEY, service );
return new InitialDirContext( env );
}