private void visitJarSystem()

in initializer-generator/src/main/java/com/alibaba/initializer/core/template/loader/ClasspathTemplateLoader.java [157:206]
38 lines of code
7 McCabe index (conditional complexity)

    private void visitJarSystem(TempFileVisitor visitor, Resource resource) throws IOException {
        URL url = resource.getURL();

        URL jarUrl = ResourceUtils.extractJarFileURL(url);

        JarFile jarFile = new JarFile(jarUrl.getFile());

        Enumeration<JarEntry> entries = jarFile.entries();

        String resourcePath = url.getFile();

        // the scan root from jar file
        String scanRoot = resourcePath.substring(resourcePath.indexOf(JAR_URL_SEPARATOR) + JAR_URL_SEPARATOR.length());
        scanRoot = scanRoot.replace(JAR_URL_SEPARATOR, "/");
        if (!scanRoot.endsWith("/")) {
            scanRoot += "/";
        }
        Path scanRootPath = Paths.get(scanRoot);

        while (entries.hasMoreElements()) {
            JarEntry entry = entries.nextElement();

            // the full name of jar entry
            String entryName = entry.getName();
            if (!entryName.startsWith(scanRoot) || entry.isDirectory()) {
                continue;
            }

            Path entryPath = Paths.get(entryName);
            String fileName = entryPath.getFileName().toString();

            Path relativePath = entryPath.subpath(scanRootPath.getNameCount(), entryPath.getNameCount());
            Path relativeFolderPath = relativePath.getNameCount() == 1
                    ? null
                    : relativePath.subpath(0,
                    relativePath.getNameCount() - 1);

            visitor.visit(new CodeTemplate(relativeFolderPath, fileName) {
                              @Override
                              public Reader getReader() {
                                  try {
                                      return new InputStreamReader(resourceLoader.getResource("classpath:/" + entryPath.toString()).getInputStream());
                                  } catch (IOException e) {
                                      throw new BizRuntimeException(ErrorCodeEnum.SYSTEM_ERROR, "load resource error", e);
                                  }
                              }
                          }
            );
        }
    }