final FileOwnerAttributeView ownerAttrView = Files.getFileAttributeView(file.toPath(), FileOwnerAttributeView.class);
            if (ownerAttrView != null) {
                final UserPrincipal owner = ownerAttrView.getOwner();
                if (owner != null) {
                    responseData.addMetaData(FS_FILE_USER, owner.getName());
                }
            }