protected void setFileAttributes()

in sshd-sftp/src/main/java/org/apache/sshd/sftp/server/AbstractSftpSubsystemHelper.java [2689:2757]
67 lines of code
17 McCabe index (conditional complexity)

    protected void setFileAttributes(
            Path file, Map<String, ?> attributes, LinkOption... options)
            throws IOException {
        Set<String> unsupported = new TreeSet<>(String.CASE_INSENSITIVE_ORDER);
        // Cannot use forEach because of the potential IOException being thrown
        for (Map.Entry<String, ?> ae : attributes.entrySet()) {
            String attribute = ae.getKey();
            Object value = ae.getValue();
            String view = null;
            switch (attribute) {
                case IoUtils.SIZE_VIEW_ATTR: {
                    long newSize = ((Number) value).longValue();
                    SftpFileSystemAccessor accessor = getFileSystemAccessor();
                    Set<OpenOption> openOptions = new HashSet<>();
                    openOptions.add(StandardOpenOption.WRITE);
                    if (!IoUtils.followLinks(options)) {
                        openOptions.add(LinkOption.NOFOLLOW_LINKS);
                    }
                    try (SeekableByteChannel channel = accessor.openFile(this, null, file, null, openOptions)) {
                        channel.truncate(newSize);
                        accessor.closeFile(this, null, file, null, channel, openOptions);
                    }
                    continue;
                }
                case IoUtils.USERID_VIEW_ATTR:
                    view = "unix";
                    break;
                case IoUtils.GROUPID_VIEW_ATTR:
                    view = "unix";
                    break;
                case IoUtils.OWNER_VIEW_ATTR:
                    view = "posix";
                    value = toUser(file, (UserPrincipal) value);
                    break;
                case IoUtils.GROUP_VIEW_ATTR:
                    view = "posix";
                    value = toGroup(file, (GroupPrincipal) value);
                    break;
                case IoUtils.PERMISSIONS_VIEW_ATTR:
                    view = "posix";
                    break;
                case IoUtils.ACL_VIEW_ATTR:
                    view = "acl";
                    break;
                case IoUtils.CREATE_TIME_VIEW_ATTR:
                    view = "basic";
                    break;
                case IoUtils.LASTMOD_TIME_VIEW_ATTR:
                    view = "basic";
                    break;
                case IoUtils.LASTACC_TIME_VIEW_ATTR:
                    view = "basic";
                    break;
                case IoUtils.EXTENDED_VIEW_ATTR:
                    view = "extended";
                    break;
                default: // ignored
            }
            if ((GenericUtils.length(view) > 0) && (value != null)) {
                try {
                    setFileAttribute(file, view, attribute, value, options);
                } catch (Exception e) {
                    handleSetFileAttributeFailure(file, view, attribute, value, unsupported, e);
                }
            }
        }

        handleUnsupportedAttributes(unsupported);
    }