File jarFile = File.createTempFile("with_circular_class_path", ".jar");
    try {
      writeSelfReferencingJarFile(jarFile, "test.txt");
      assertThat(
              new ClassPath.LocationInfo(jarFile, ClassPathTest.class.getClassLoader())
                  .scanResources())
          .hasSize(1);
    } finally {
      jarFile.delete();
    }
  }

    File jarFile = File.createTempFile("with_circular_class_path", ".jar");
    try {
      writeSelfReferencingJarFile(jarFile, "test.txt");
      assertThat(
              new ClassPath.LocationInfo(jarFile, ClassPathTest.class.getClassLoader())
                  .scanResources())
          .hasSize(1);
    } finally {
      jarFile.delete();
    }
  }

         * @param rootDir
         *            The root directory.
         */
        public JarFileTraverser(final JarFile jarFile, final String rootPackage, final String rootDir) {
            this.jarFile = jarFile;
            this.rootPackage = rootPackage;
            this.rootDir = rootDir;
        }

        /**
         * Constructs an instance.
         *
         * @param url

        throws IOException {
      JarFile jarFile;
      try {
        jarFile = new JarFile(file);
      } catch (IOException e) {
        // Not a jar file
        return;
      }
      try {
        for (File path : getClassPathFromManifest(file, jarFile.getManifest())) {
          // We only scan each file once independent of the classloader that file might be

    @Test
    public void test_loadDataStoreNameList_validXml() throws Exception {
        // Create test JAR with valid XML
        final File jarFile = new File(tempDir, "test-datastore.jar");
        createTestJarWithXml(jarFile,
                "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" + "<components>\n"
                        + "  <component class=\"org.codelibs.fess.ds.impl.CsvDataStore\"/>\n"

                if (form.jarFile == null) {
                    throwValidationError(messages -> messages.addErrorsPluginFileIsNotFound(GLOBAL, form.id), this::asListHtml);
                }
                if (!form.jarFile.getFileName().endsWith(".jar")) {
                    throwValidationError(messages -> messages.addErrorsFileIsNotSupported(GLOBAL, form.jarFile.getFileName()),

                    final JarURLConnection jarURLConnection = (JarURLConnection) resource.openConnection();
                    try (JarFile jarFile = jarURLConnection.getJarFile()) {
                        final Enumeration<JarEntry> entries = jarFile.entries();
                        while (entries.hasMoreElements()) {
                            final JarEntry entry = entries.nextElement();