Review

class FastDateFormat.Rule {
        /**
         * Returns the estimated lentgh of the result.
         * 
         * @return the estimated length
         */
        int estimateLength();
}

class FastDateFormat.CharacterLiteral {
        /**
         * {@inheritDoc}
         */
        public int estimateLength() {
            return 1;
        }
}

class FastDateFormat.StringLiteral {
        public int estimateLength() {
            return mValue.length();
        }
}

class FastDateFormat.TextField {
        public int estimateLength() {
            int max = 0;
            for (int i=mValues.length; --i >= 0; ) {
                int len = mValues[i].length();
                if (len > max) {
                    max = len;
                }
            }
            return max;
        }
}

class FastDateFormat.UnpaddedNumberField {
        public int estimateLength() {
            return 4;
        }
}

class FastDateFormat.UnpaddedMonthField {
        public int estimateLength() {
            return 2;
        }
}

class FastDateFormat.PaddedNumberField {
        public int estimateLength() {
            return 4;
        }
}

class FastDateFormat.TwoDigitNumberField {
        public int estimateLength() {
            return 2;
        }
}

class FastDateFormat.TwoDigitYearField {
        public int estimateLength() {
            return 2;
        }
}

class FastDateFormat.TwoDigitMonthField {
        public int estimateLength() {
            return 2;
        }
}

class FastDateFormat.TwelveHourField {
        public int estimateLength() {
            return mRule.estimateLength();
        }
}

class FastDateFormat.TwentyFourHourField {
        public int estimateLength() {
            return mRule.estimateLength();
        }
}

class FastDateFormat.TimeZoneNameRule {
        public int estimateLength() {
            if (mTimeZoneForced) {
                return Math.max(mStandard.length(), mDaylight.length());
            } else if (mStyle == TimeZone.SHORT) {
                return 4;
            } else {
                return 40;
            }
        }
}

class FastDateFormat.TimeZoneNumberRule {
        public int estimateLength() {
            return 5;
        }

}