@Override
 public void insertSignatureFile(
     InputStream file,
     long size,
     String fileName,
     UserVo ownerVo,
     DocumentVo documentVo,
     X509Certificate signerCertificate)
     throws BusinessException {
   Account actor = accountService.findByLsUuid(ownerVo.getLsUuid());
   DocumentEntry documentEntry = documentEntryService.findById(actor, documentVo.getIdentifier());
   signatureService.createSignature(
       actor, documentEntry.getDocument(), file, size, fileName, signerCertificate);
 }
 @Override
 public InputStream retrieveSignatureFileStream(SignatureVo signaturedoc) {
   Signature signature = signatureService.findByUuid(signaturedoc.getIdentifier());
   return signatureService.getDocumentStream(signature);
 }