private String getPhysicalName()

in pekko-connectors-sample-rotate-logs-to-ftp/src/main/java/playground/filesystem/impl/JimfsView.java [151:248]
73 lines of code
21 McCabe index (conditional complexity)

  private String getPhysicalName(final String file) {

    // get the starting directory
    String normalizedRootDir = normalizeSeparateChar(rootDir);
    if (normalizedRootDir.charAt(normalizedRootDir.length() - 1) != '/') {
      normalizedRootDir += '/';
    }

    String normalizedFileName = normalizeSeparateChar(file);
    String resArg;
    String normalizedCurrDir = currDir;
    if (normalizedFileName.charAt(0) != '/') {
      if (normalizedCurrDir == null || normalizedCurrDir.length() == 0) {
        normalizedCurrDir = "/";
      }

      normalizedCurrDir = normalizeSeparateChar(normalizedCurrDir);

      if (normalizedCurrDir.charAt(0) != '/') {
        normalizedCurrDir = '/' + normalizedCurrDir;
      }
      if (normalizedCurrDir.charAt(normalizedCurrDir.length() - 1) != '/') {
        normalizedCurrDir += '/';
      }

      resArg = normalizedRootDir + normalizedCurrDir.substring(1);
    } else {
      resArg = normalizedRootDir;
    }

    // strip last '/'
    if (resArg.charAt(resArg.length() - 1) == '/') {
      resArg = resArg.substring(0, resArg.length() - 1);
    }

    // replace ., ~ and ..
    // in this loop resArg will never end with '/'
    StringTokenizer st = new StringTokenizer(normalizedFileName, "/");
    while (st.hasMoreTokens()) {
      String tok = st.nextToken();

      // . => current directory
      if (tok.equals(".")) {
        continue;
      }

      // .. => parent directory (if not root)
      if (tok.equals("src/main")) {
        if (resArg.startsWith(normalizedRootDir)) {
          int slashIndex = resArg.lastIndexOf("/");
          if (slashIndex != -1) {
            resArg = resArg.substring(0, slashIndex);
          }
        }
        continue;
      }

      // ~ => home directory (in this case is the root directory)
      if (tok.equals("~")) {
        resArg = normalizedRootDir.substring(0, normalizedRootDir.length() - 1);
        continue;
      }

      if (caseInsensitive) {
        Path dir = fileSystem.getPath(resArg);
        DirectoryStream<Path> dirStream = null;
        try {
          dirStream = Files.newDirectoryStream(dir, new NameEqualsPathFilter(tok, true));
        } catch (IOException t) {
          // ignore
        }
        List<Path> matches = new ArrayList<>(0);
        if (dirStream != null) {
          for (Path match : dirStream) {
            matches.add(match);
          }
        }
        if (matches.size() > 0) {
          tok = matches.get(0).getFileName().toString();
        }
      }

      resArg = resArg + '/' + tok;
    }

    // add last slash if necessary
    if ((resArg.length()) + 1 == normalizedRootDir.length()) {
      resArg += '/';
    }

    // final check
    if (!resArg.regionMatches(0, normalizedRootDir, 0, normalizedRootDir
        .length())) {
      resArg = normalizedRootDir;
    }

    return resArg;
  }