code: @Override
      public void refresh() {
          FileReader fr = null;
          if (file != null) {
              try {
                  fr = new FileReader(file);
              } catch (Exception e) {
                  System.err.println("Unable to read policy file " + file + ": " + e.getMessage());
              }
          }
          loadPolicy(fr, skipDefaultPolicies);
      }
docs: Method which loads policy data from policy file.