* {@link JarURLConnection#getJarFile()}の例外処理をラップするメソッドです。
     *
     * @param conn
     *            {@link JarURLConnection}。{@literal null}であってはいけません
     * @return {@link JarFile}
     */
    public static JarFile getJarFile(final JarURLConnection conn) {
        assertArgumentNotNull("conn", conn);

        try {
            return conn.getJarFile();
        } catch (final IOException e) {

        final String classFilePath = TestCase.class.getName().replace('.', '/') + ".class";
        final URL classURL = ResourceUtil.getResource(classFilePath);
        final JarURLConnection con = (JarURLConnection) classURL.openConnection();
        ClassTraversalUtil.forEach(con.getJarFile(), (ClassHandler) (packageName, shortClassName) -> {
            if (count < 10) {
                System.out.println(ClassUtil.concatName(packageName, shortClassName));

							<dst>${packaging.fess.systemd.sysctl.dir}/fess.conf</dst>
						</data>
						<!-- Adds systemd/tmpfiles.d configuration file -->
						<data>
							<type>file</type>
							<src>${project.build.directory}/generated-packaging/deb/systemd/fess.conf</src>
							<dst>${packaging.fess.tmpfilesd.dir}/fess.conf</dst>
						</data>
						<!-- Add lintian files -->

        setUpParameterizedClassDesc();
    }

    private void setupStringConstructor() {
        for (final Constructor<?> con : propertyType.getConstructors()) {
            if (con.getParameterTypes().length == 1 && con.getParameterTypes()[0].equals(String.class)) {
                stringConstructor = con;
                break;
            }
        }
    }

    private void setupValueOfMethod() {

        final String classFilePath = TestCase.class.getName().replace('.', '/') + ".class";
        final URL classURL = ResourceUtil.getResource(classFilePath);
        final JarURLConnection con = (JarURLConnection) classURL.openConnection();
        ResourceTraversalUtil.forEach(con.getJarFile(), (ResourceHandler) (path, is) -> {
            try {
                if (count < 10) {
                    System.out.println(path);
                }

     */
    public static JarFile toJarFile(final URL jarUrl) {
        assertArgumentNotNull("jarUrl", jarUrl);

        final URLConnection con = URLUtil.openConnection(jarUrl);
        if (con instanceof JarURLConnection) {
            return JarURLConnectionUtil.getJarFile((JarURLConnection) con);
        }
        return create(new File(toJarFilePath(jarUrl)));
    }

    /**
     * URLで指定されたJarファイルのパスを返します。
     *