*
     * @param jarUrl the URL of the JAR file (must not be {@literal null})
     * @return a <code>JarFile</code> to read the JAR file specified by the URL
     */
    public static JarFile toJarFile(final URL jarUrl) {
        assertArgumentNotNull("jarUrl", jarUrl);

        final URLConnection con = URLUtil.openConnection(jarUrl);
        if (con instanceof JarURLConnection) {

                if (zipUrlString.toUpperCase().endsWith(WAR_CLASSES_PREFIX)) {
                    final URL warUrl = URLUtil.create(zipUrl, "../..");
                    final String path = warUrl.getPath();
                    zipUrl = FileUtil.toURL(new File(path.substring(0, path.length() - 1)));
                    prefix = zipUrlString.substring(warUrl.toExternalForm().length());
                    loadFromZip(zipUrl);
                }
            }