/* * Copyright (c) 1997, 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 4033662 * @library /java/text/testlib * @summary test for limit on Calendar * @run main CalendarLimitTest -verbose */ import java.util.*; import java.text.*; /** * This test verifies the behavior of Calendar around the very earliest limits * which it can handle. It also verifies the behavior for large values of millis. * * Note: There used to be a limit, due to a bug, for early times. There is * currently no limit. * * March 17, 1998: Added code to make sure big + dates are big + AD years, and * big - dates are big + BC years. */ public class CalendarLimitTest extends IntlTest { // This number determined empirically; this is the old limit, // which we test for to make sure it isn't there anymore. static final long EARLIEST_SUPPORTED_MILLIS = -210993120000000L; static final int EPOCH_JULIAN_DAY = 2440588; // Jaunary 1, 1970 (Gregorian) static final int JAN_1_1_JULIAN_DAY = 1721426; // January 1, year 1 (Gregorian) // Useful millisecond constants static final int ONE_SECOND = 1000; static final int ONE_MINUTE = 60*ONE_SECOND; static final int ONE_HOUR = 60*ONE_MINUTE; static final int ONE_DAY = 24*ONE_HOUR; static final int ONE_WEEK = 7*ONE_DAY; static final long ONE_YEAR = (long)(365.2425 * ONE_DAY); static long ORIGIN; // This is the *approximate* point at which BC switches to AD public static void main(String argv[]) throws Exception { new CalendarLimitTest().run(argv); } /** * Converts Julian day to time as milliseconds. * @param julian the given Julian day number. * @return time as milliseconds. */ private static final long julianDayToMillis(long julian) { return (julian - EPOCH_JULIAN_DAY) * ONE_DAY; } /** * Verify that the given time is processed without problem. * @return the adjust year, with 0 = 1 BC, -1 = 2 BC, etc. */ int test(long millis, Calendar cal, DateFormat fmt) { Exception exception = null; String theDate = ""; try { Date d= new Date(millis); cal.setTime(d); theDate = fmt.format(d); } catch (IllegalArgumentException e) { exception = e; } String s = "0x" + Long.toHexString(millis) + " " + theDate; int era=cal.get(Calendar.ERA), year=cal.get(Calendar.YEAR), dom=cal.get(Calendar.DATE), mon=cal.get(Calendar.MONTH); cal.clear(); cal.set(year, mon, dom); cal.set(Calendar.ERA, era); Date rt = cal.getTime(); boolean ok = true; if (exception != null) { errln("FAIL: Exception " + s); ok = false; } if (((millis >= ORIGIN) && (era != GregorianCalendar.AD)) || ((millis < ORIGIN) && (era != GregorianCalendar.BC)) || (year < 1)) { errln("FAIL: Bad year/era " + s); ok = false; } if (dom<1 || dom>31) { errln("FAIL: Bad DOM " + s); ok = false; } if (Math.abs(millis - rt.getTime()) > ONE_DAY) { errln("FAIL: RT fail " + s + " -> 0x" + Long.toHexString(rt.getTime()) + " " + fmt.format(rt)); ok = false; } if (ok) logln(s); if (era==GregorianCalendar.BC) year = 1-year; return year; } public void TestCalendarLimit() { ORIGIN = julianDayToMillis(JAN_1_1_JULIAN_DAY); Calendar cal = Calendar.getInstance(); // You must set the time zone to GMT+0 or the edge cases like // Long.MIN_VALUE, Long.MAX_VALUE, and right around the threshold // won't work, since before converting to fields the calendar code // will add the offset for the zone. cal.setTimeZone(TimeZone.getTimeZone("Africa/Casablanca")); DateFormat dateFormat = DateFormat.getDateInstance(); dateFormat.setCalendar(cal); // Make sure you do this -- same reason as above ((SimpleDateFormat)dateFormat).applyPattern("MMM d, yyyy G"); // Don't expect any failure for positive longs int lastYear=0; boolean first=true; for (long m = Long.MAX_VALUE; m > 0; m >>= 1) { int y = test(m, cal, dateFormat); if (!first && y > lastYear) errln("FAIL: Years should be decreasing " + lastYear + " " + y); first = false; lastYear = y; } // Expect failures for negative millis below threshold first = true; for (long m = Long.MIN_VALUE; m < 0; m /= 2) // Don't use m >>= 1 { int y = test(m, cal, dateFormat); if (!first && y < lastYear) errln("FAIL: Years should be increasing " + lastYear + " " + y); first = false; lastYear = y; } // Test right around the threshold test(EARLIEST_SUPPORTED_MILLIS, cal, dateFormat); test(EARLIEST_SUPPORTED_MILLIS-1, cal, dateFormat); // Test a date that should work test(Long.MIN_VALUE + ONE_DAY, cal, dateFormat); // Try hours in the earliest day or two // JUST FOR DEBUGGING: if (false) { ((SimpleDateFormat)dateFormat).applyPattern("H:mm MMM d, yyyy G"); for (int dom=2; dom<=3; ++dom) { for (int h=0; h<24; ++h) { cal.clear(); cal.set(Calendar.ERA, GregorianCalendar.BC); cal.set(292269055, Calendar.DECEMBER, dom, h, 0); Date d = cal.getTime(); cal.setTime(d); logln("" + h + ":00 Dec "+dom+", 292269055 BC -> " + Long.toHexString(d.getTime()) + " -> " + dateFormat.format(cal.getTime())); } } // Other way long t = 0x80000000018c5c00L; // Dec 3, 292269055 BC while (t<0) { cal.setTime(new Date(t)); logln("0x" + Long.toHexString(t) + " -> " + dateFormat.format(cal.getTime())); t -= ONE_HOUR; } } } } //eof