@Override
              public Integer apply(String from) {
                return Integer.valueOf(from);
              }
            });

    result.next();
    assertThrows(NumberFormatException.class, () -> result.next());
  }

  public void testNullFriendlyTransform() {
    Iterator<Integer> input = asList(1, 2, null, 3).iterator();
    Iterator<String> result =
        Iterators.transform(

        val portString = input.canonicalize(pos = pos, limit = limit, encodeSet = "")
        val i = portString.toInt()
        if (i in 1..65535) i else -1
      } catch (_: NumberFormatException) {
        -1 // Invalid port.
      }
    }
  }

  companion object {
    /** Returns 80 if `scheme.equals("http")`, 443 if `scheme.equals("https")` and -1 otherwise. */
    @JvmStatic

                            "Invalid threads value: '" + threadConfiguration + "'. Value must be positive.");
                }
                return threads;
            }
        } catch (NumberFormatException e) {
            throw new IllegalArgumentException("Invalid threads value: '" + threadConfiguration
                    + "'. Supported are int and float values ending with C.");
        }
    }

                }
                try {
                    searchRequestBuilder.setTrackTotalHitsUpTo(Integer.parseInt(trackTotalHits));
                    return;
                } catch (final NumberFormatException e) {
                    // ignore
                }
            }
            final Object trackTotalHitsValue = fessConfig.getQueryTrackTotalHitsValue();