code: private static String getTempDir(Class<?> loader)
      {
          final File temp = new File(TEMP, loader.getSimpleName());
          final String path = temp.getAbsolutePath();
          if (!temp.isDirectory() && !temp.mkdir())
          {
              Verbose.warning(ERROR_CREATE_TEMP_DIR, path);
          }
          return path;
      }
docs: Create the temp directory relative to loader class name.
  
  @param loader The class loader.
  @return The temp directory absolute path.