// for performance, check digits instead of relying later on catching NumberFormatException
        if (!isDigits(s)) {
            return null;
        }

        try {
            long longValue = Long.parseLong(s);
            if (longValue > Integer.MAX_VALUE) {
                return null;
            }
            return (int) longValue;
        } catch (NumberFormatException e) {

            msg += " (";
            msg += (rev != null ? rev : "");
            if (timestamp != null && !timestamp.isEmpty()) {
                String ts = formatTimestamp(Long.parseLong(timestamp));
                msg += (rev != null ? "; " : "") + ts;
            }
            msg += ")";
        }
        return msg;
    }

    private static String reduce(String s) {

        if (props != null) {
            String rawVal = props.getProperty(key);
            if (rawVal != null) {
                try {
                    return new Date(Long.parseLong(rawVal));
                } catch (NumberFormatException e) {
                    getLogger().debug("Cannot parse lastUpdated date: '" + rawVal + "'. Ignoring.", e);
                }
            }
        }

  }

  /**
   * Parses the specified string as a signed decimal long value. The ASCII character {@code '-'} (
   * <code>'&#92;u002D'</code>) is recognized as the minus sign.
   *
   * <p>Unlike {@link Long#parseLong(String)}, this method returns {@code null} instead of throwing
   * an exception if parsing fails. Additionally, this method only accepts ASCII digits, and returns
   * {@code null} if non-ASCII digits are present in the string.

   *     Integer#parseInt(String)})
   */
  @CanIgnoreReturnValue
  public static int parseUnsignedInt(String string, int radix) {
    checkNotNull(string);
    long result = Long.parseLong(string, radix);
    if ((result & INT_MASK) != result) {
      throw new NumberFormatException(
          "Input " + string + " in base " + radix + " is not in the range of an unsigned integer");
    }

   *     Integer#parseInt(String)})
   */
  @CanIgnoreReturnValue
  public static int parseUnsignedInt(String string, int radix) {
    checkNotNull(string);
    long result = Long.parseLong(string, radix);
    if ((result & INT_MASK) != result) {
      throw new NumberFormatException(
          "Input " + string + " in base " + radix + " is not in the range of an unsigned integer");
    }

     */
    private static class LongItem implements Item {
        private final long value;

        LongItem(String str) {
            this.value = Long.parseLong(str);
        }

        @Override
        public int getType() {
            return LONG_ITEM;
        }

        @Override
        public boolean isNull() {
            return value == 0;