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/*
* Copyright (c) 2007-present, 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.
*
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* * Neither the name of JSR-310 nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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package org.threeten.extra.chrono;
import java.time.chrono.AbstractChronology;
import java.time.temporal.ChronoField;
import java.time.temporal.ValueRange;
/**
* A chronology describing one of the Nile river calendar systems.
*
* Implementation Requirements
* Implementations must be immutable and thread-safe.
*/
abstract class AbstractNileChronology
extends AbstractChronology {
/**
* Range of proleptic-year.
*/
static final ValueRange YEAR_RANGE = ValueRange.of(-999_998, 999_999);
/**
* Range of year.
*/
static final ValueRange YOE_RANGE = ValueRange.of(1, 999_999);
/**
* Range of proleptic month.
*/
static final ValueRange PROLEPTIC_MONTH_RANGE = ValueRange.of(-999_998 * 13L, 999_999 * 13L + 12);
/**
* Range of months.
*/
static final ValueRange MOY_RANGE = ValueRange.of(1, 13);
/**
* Range of weeks.
*/
static final ValueRange ALIGNED_WOM_RANGE = ValueRange.of(1, 1, 5);
/**
* Range of days.
*/
static final ValueRange DOM_RANGE = ValueRange.of(1, 5, 30);
/**
* Range of days.
*/
static final ValueRange DOM_RANGE_NONLEAP = ValueRange.of(1, 5);
/**
* Range of days.
*/
static final ValueRange DOM_RANGE_LEAP = ValueRange.of(1, 6);
/**
* Private constructor.
*/
AbstractNileChronology() {
}
//-----------------------------------------------------------------------
/**
* Checks if the specified year is a leap year.
*
* The proleptic-year is leap if the remainder after division by four equals three.
* This method does not validate the year passed in, and only has a
* well-defined result for years in the supported range.
*
* @param prolepticYear the proleptic-year to check, not validated for range
* @return true if the year is a leap year
*/
@Override
public boolean isLeapYear(long prolepticYear) {
return Math.floorMod(prolepticYear, 4) == 3;
}
//-----------------------------------------------------------------------
@Override
public ValueRange range(ChronoField field) {
switch (field) {
case DAY_OF_MONTH:
return DOM_RANGE;
case ALIGNED_WEEK_OF_MONTH:
return ALIGNED_WOM_RANGE;
case MONTH_OF_YEAR:
return MOY_RANGE;
case PROLEPTIC_MONTH:
return PROLEPTIC_MONTH_RANGE;
case YEAR_OF_ERA:
return YOE_RANGE;
case YEAR:
return YEAR_RANGE;
default:
break;
}
return field.range();
}
}