}
CmisAccessControlEntryType entry = new CmisAccessControlEntryType();
if (ace.getPrincipal() != null) {
CmisAccessControlPrincipalType pincipal = new CmisAccessControlPrincipalType();
pincipal.setPrincipalId(ace.getPrincipal().getId());
convertExtension(pincipal, ace.getPrincipal());
entry.setPrincipal(pincipal);
}