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* Copyright (c) 2012, Stephen Colebourne & Michael Nascimento Santos
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
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package build.tools.tzdb;
* A standard set of date/time fields.
*
* @since 1.8
*/
enum ChronoField {
* The second-of-minute.
* <p>
* This counts the second within the minute, from 0 to 59.
* This field has the same meaning for all calendar systems.
*/
SECOND_OF_MINUTE("SecondOfMinute", 0, 59),
* The second-of-day.
* <p>
* This counts the second within the day, from 0 to (24 * 60 * 60) - 1.
* This field has the same meaning for all calendar systems.
*/
SECOND_OF_DAY("SecondOfDay", 0, 86400 - 1),
* The minute-of-hour.
* <p>
* This counts the minute within the hour, from 0 to 59.
* This field has the same meaning for all calendar systems.
*/
MINUTE_OF_HOUR("MinuteOfHour", 0, 59),
* The hour-of-day.
* <p>
* This counts the hour within the day, from 0 to 23.
* This is the hour that would be observed on a standard 24-hour digital clock.
* This field has the same meaning for all calendar systems.
*/
HOUR_OF_DAY("HourOfDay", 0, 23),
* The day-of-month.
* <p>
* This represents the concept of the day within the month.
* In the default ISO calendar system, this has values from 1 to 31 in most months.
* April, June, September, November have days from 1 to 30, while February has days
* from 1 to 28, or 29 in a leap year.
* <p>
* Non-ISO calendar systems should implement this field using the most recognized
* day-of-month values for users of the calendar system.
* Normally, this is a count of days from 1 to the length of the month.
*/
DAY_OF_MONTH("DayOfMonth", 1, 31),
* The month-of-year, such as March.
* <p>
* This represents the concept of the month within the year.
* In the default ISO calendar system, this has values from January (1) to December (12).
* <p>
* Non-ISO calendar systems should implement this field using the most recognized
* month-of-year values for users of the calendar system.
* Normally, this is a count of months starting from 1.
*/
MONTH_OF_YEAR("MonthOfYear", 1, 12),
* The proleptic year, such as 2012.
* <p>
* This represents the concept of the year, counting sequentially and using negative numbers.
* The proleptic year is not interpreted in terms of the era.
* See {@link #YEAR_OF_ERA} for an example showing the mapping from proleptic year to year-of-era.
* <p>
* The standard mental model for a date is based on three concepts - year, month and day.
* These map onto the {@code YEAR}, {@code MONTH_OF_YEAR} and {@code DAY_OF_MONTH} fields.
* Note that there is no reference to eras.
* The full model for a date requires four concepts - era, year, month and day. These map onto
* the {@code ERA}, {@code YEAR_OF_ERA}, {@code MONTH_OF_YEAR} and {@code DAY_OF_MONTH} fields.
* Whether this field or {@code YEAR_OF_ERA} is used depends on which mental model is being used.
* See {@link ChronoLocalDate} for more discussion on this topic.
* <p>
* Non-ISO calendar systems should implement this field as follows.
* If the calendar system has only two eras, before and after a fixed date, then the
* proleptic-year value must be the same as the year-of-era value for the later era,
* and increasingly negative for the earlier era.
* If the calendar system has more than two eras, then the proleptic-year value may be
* defined with any appropriate value, although defining it to be the same as ISO may be
* the best option.
*/
YEAR("Year", -999_999_999, 999_999_999);
private final String name;
private final int min;
private final int max;
private ChronoField(String name, int min, int max) {
this.name = name;
this.min= min;
this.max= max;
}
* Checks that the specified value is valid for this field.
* <p>
*
* @param value the value to check
* @return the value that was passed in
*/
public int checkValidValue(int value) {
if (value >= min && value <= max) {
return value;
}
throw new DateTimeException("Invalid value for " + name + " value: " + value);
}
public String toString() {
return name;
}
}