@Override public Collection<IT0185> findByPernr(Long pernr) { if (pernr == null) { return Collections.emptyList(); } Optional<Collection<IT0185>> bunchOfIT0185 = Optional.ofNullable( it0185Repository.findByPernr(pernr, SAPInfoType.PERSONAL_ID.infoType())); return (bunchOfIT0185.isPresent() ? bunchOfIT0185.get().stream().collect(Collectors.toList()) : Collections.emptyList()); }