public static File getResourceFile()

in src/main/java/org/apache/datasketches/characterization/ResourceFiles.java [56:81]

• 26 lines of code
• 7 McCabe index (conditional complexity)

  public static File getResourceFile(final String shortFileName) {
    Objects.requireNonNull(shortFileName, "input parameter 'String shortFileName' cannot be null.");
    final String slashName = (shortFileName.charAt(0) == '/') ? shortFileName : '/' + shortFileName;
    final URL url = ResourceFiles.class.getResource(slashName);
    Objects.requireNonNull(url, "resource " + slashName + " returns null URL.");
    File file;
    file = createTempFile(slashName);
    if (url.getProtocol().equals("jar")) { //definitely a jar
      try (final InputStream input = ResourceFiles.class.getResourceAsStream(slashName);
        final OutputStream out = new FileOutputStream(file)) {
        Objects.requireNonNull(input, "InputStream  is null.");
        int numRead = 0;
        final byte[] buf = new byte[1024];
        while ((numRead = input.read(buf)) != -1) { out.write(buf, 0, numRead); }
      } catch (final IOException e ) { throw new RuntimeException(e); }
    } else { //protocol says resource is not a jar, must be a file
      file = new File(getResourcePath(url));
    }
    if (!file.setReadable(false, true)) {
      throw new IllegalStateException("Failed to set owner only 'Readable' on file");
    }
    if (!file.setWritable(false, false)) {
      throw new IllegalStateException("Failed to set everyone 'Not Writable' on file");
    }
    return file;
  }