| /* |
| * Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 5090555 5091805 |
| * @summary Make sure that rolling DAY_OF_WEEK stays in the same week |
| * around year boundaries. |
| * @run main/othervm RollDayOfWeekTest 5 5 |
| */ |
| |
| import java.util.*; |
| |
| import static java.util.Calendar.*; |
| |
| // Usage: java RollDayOfWeekTest [pastYears futureYears] |
| public class RollDayOfWeekTest { |
| public static void main(String[] args) { |
| int pastYears = 5, futureYears = 23; |
| if (args.length == 2) { |
| pastYears = Integer.parseInt(args[0]); |
| pastYears = Math.max(1, Math.min(pastYears, 5)); |
| futureYears = Integer.parseInt(args[1]); |
| futureYears = Math.max(1, Math.min(futureYears, 28)); |
| } |
| |
| System.out.printf("Test [%d .. %+d] year range.%n", -pastYears, futureYears); |
| Calendar cal = new GregorianCalendar(); |
| int year = cal.get(YEAR) - pastYears; |
| |
| // Use the all combinations of firstDayOfWeek and |
| // minimalDaysInFirstWeek values in the year range current |
| // year - pastYears to current year + futureYears. |
| for (int fdw = SUNDAY; fdw <= SATURDAY; fdw++) { |
| for (int mdifw = 1; mdifw <= 7; mdifw++) { |
| cal.clear(); |
| cal.setFirstDayOfWeek(fdw); |
| cal.setMinimalDaysInFirstWeek(mdifw); |
| cal.set(year, JANUARY, 1); |
| checkRoll(cal, futureYears); |
| } |
| } |
| |
| // testing roll from BCE to CE |
| year = -1; |
| for (int fdw = SUNDAY; fdw <= SATURDAY; fdw++) { |
| for (int mdifw = 1; mdifw <= 7; mdifw++) { |
| cal.clear(); |
| cal.setFirstDayOfWeek(fdw); |
| cal.setMinimalDaysInFirstWeek(mdifw); |
| cal.set(year, JANUARY, 1); |
| checkRoll(cal, 4); |
| } |
| } |
| } |
| |
| |
| static void checkRoll(Calendar cal, int years) { |
| Calendar cal2 = null, cal3 = null, prev = null; |
| // Check 28 years |
| for (int x = 0; x < (int)(365.2425*years); x++) { |
| cal2 = (Calendar) cal.clone(); |
| cal3 = (Calendar) cal.clone(); |
| |
| // roll foreword |
| for (int i = 0; i < 10; i++) { |
| prev = (Calendar) cal2.clone(); |
| cal2.roll(Calendar.DAY_OF_WEEK, +1); |
| roll(cal3, +1); |
| long t2 = cal2.getTimeInMillis(); |
| long t3 = cal3.getTimeInMillis(); |
| if (t2 != t3) { |
| System.err.println("prev: " + prev.getTime() + "\n" + prev); |
| System.err.println("cal2: " + cal2.getTime() + "\n" + cal2); |
| System.err.println("cal3: " + cal3.getTime() + "\n" + cal3); |
| throw new RuntimeException("+1: t2=" + t2 + ", t3=" + t3); |
| } |
| } |
| |
| // roll backward |
| for (int i = 0; i < 10; i++) { |
| prev = (Calendar) cal2.clone(); |
| cal2.roll(Calendar.DAY_OF_WEEK, -1); |
| roll(cal3, -1); |
| long t2 = cal2.getTimeInMillis(); |
| long t3 = cal3.getTimeInMillis(); |
| if (t2 != t3) { |
| System.err.println("prev: " + prev.getTime() + "\n" + prev); |
| System.err.println("cal2: " + cal2.getTime() + "\n" + cal2); |
| System.err.println("cal3: " + cal3.getTime() + "\n" + cal3); |
| throw new RuntimeException("-1: t2=" + t2 + ", t3=" + t3); |
| } |
| } |
| cal.add(DAY_OF_YEAR, +1); |
| } |
| } |
| |
| // Another way to roll within the same week. |
| static void roll(Calendar cal, int n) { |
| int doy = cal.get(DAY_OF_YEAR); |
| int diff = cal.get(DAY_OF_WEEK) - cal.getFirstDayOfWeek(); |
| if (diff < 0) { |
| diff += 7; |
| } |
| |
| // dow1: first day of the week |
| int dow1 = doy - diff; |
| n %= 7; |
| doy += n; |
| if (doy < dow1) { |
| doy += 7; |
| } else if (doy >= dow1 + 7) { |
| doy -= 7; |
| } |
| cal.set(DAY_OF_YEAR, doy); |
| } |
| } |