c = ( Comparator ) bootstrap.lookup( oid );
c = bootstrap.lookup( oid );
    public Comparator lookup( String oid ) throws NamingException    {        Comparator c;        NamingException e;        if ( comparators.containsKey( oid ) )        {            c = ( Comparator ) comparators.get( oid );            monitor.lookedUp( oid, c );            return c;        }        if ( bootstrap.hasComparator( oid ) )        {            c = ( Comparator ) bootstrap.lookup( oid );            monitor.lookedUp( oid, c );            return c;        }        e = new NamingException( "Comparator not found for OID: " + oid );        monitor.lookupFailed( oid, e );        throw e;    }