if (rootDirectory != null) {
            return getCanonicalPath(rootDirectory);
        }
        return null;
    }

    @Nonnull
    public static Path findMandatoryRoot(Path topDirectory) {
        requireNonNull(topDirectory, "topDirectory");
        return getCanonicalPath(Optional.ofNullable(

        for (final WebResource possibleJar : possibleJars) {
            if (possibleJar.isFile() && possibleJar.getName().endsWith(".jar")) {
                try (final JarFile jarFile = new JarFile(possibleJar.getCanonicalPath())) {
                    final Manifest manifest = jarFile.getManifest();
                    if (manifest != null && manifest.getEntries() != null) {

        this.invokerRequest = requireNonNull(invokerRequest);
        this.cwd = CWD.create(invokerRequest.cwd());
        this.installationDirectory = CliUtils.getCanonicalPath(invokerRequest.installationDirectory());
        this.userDirectory = CliUtils.getCanonicalPath(invokerRequest.userHomeDirectory());
        this.containerCapsuleManaged = containerCapsuleManaged;
        this.options = options;

            assertEquals("smb1://server/share/file.txt", new SmbFile("smb1://server/share/dir/../file.txt").getCanonicalPath());
            assertEquals("smb1://server/file.txt", new SmbFile("smb1://server/share/../file.txt").getCanonicalPath());
            assertEquals("smb1://server/share/", new SmbFile("smb1://server/share/").getCanonicalPath());
        }

        @Test
        public void testGetUncPath() throws MalformedURLException {

            @Override
            protected URLConnection openConnection(final URL u) throws IOException {
                return null;
            }
        });
        final String root = new File("/").getCanonicalPath();
        assertEquals(root + "Program Files" + File.separator + "foo.zip", ZipFileUtil.toZipFilePath(url));
    }

    public void testToJarFilePath() throws Exception {
        final File f = new File("/Program Files/foo.jar");
        final URL url = new URL("jar:" + f.toURI().toURL() + "!/");
        final String root = new File("/").getCanonicalPath();
        assertEquals(root + "Program Files" + File.separator + "foo.jar", JarFileUtil.toJarFilePath(url));
    }

    /**
     * @throws Exception
     */
    public void testRelativePath() throws Exception {

            }
            final File file = filePath.toFile();
            final String canonicalPath = file.getCanonicalPath();
            final String varPath = System.getProperty("fess.var.path");
            if (varPath != null) {
                final String baseCanonicalPath = new File(varPath).getCanonicalPath();
                if (!canonicalPath.startsWith(baseCanonicalPath)) {

 */
public final class CWD implements Supplier<Path> {
    /**
     * Creates instance out of {@link Path}.
     */
    public static CWD create(Path path) {
        return new CWD(CliUtils.getCanonicalPath(path));
    }

    private Path directory;

    private CWD(Path directory) {
        this.directory = directory;
    }

    @Nonnull
    @Override
    public Path get() {

            if (file.isDirectory()) {
                traverseFileSystem(rootDir, file, handler);
            } else {
                final int pos = FileUtil.getCanonicalPath(rootDir).length();
                final String filePath = FileUtil.getCanonicalPath(file);
                final String resourcePath = filePath.substring(pos + 1).replace('\\', '/');
                final InputStream is = InputStreamUtil.create(file);

        url = ResourceUtil.getResource("java/lang/String.class");
        assertNull(ResourceUtil.getFile(url));
    }

    private String getRoot() throws IOException {
        final String root = new File("/").getCanonicalPath().replace('\\', '/');
        if (root.startsWith("/")) {
            return root;
        }
        return "/" + root;
    }