java.time.format.DateTimeFormatter Java Examples

@Override
public String generateInfoText() {
    String dataInfo = "";
    int i;
    dataInfo += "File Name: " + this.getFileName();
    dataInfo += System.getProperty("line.separator") + "Trajectory number = " + String.valueOf(this.trajNum);
    dataInfo += System.getProperty("line.separator") + "Trajectory direction = " + trajDirection;
    dataInfo += System.getProperty("line.separator") + "Vertical motion =" + verticalMotion;
    dataInfo += System.getProperty("line.separator") + "Number of diagnostic output variables = "
            + String.valueOf(varNum);
    dataInfo += System.getProperty("line.separator") + "Variables:";
    for (i = 0; i < varNum; i++) {
        dataInfo += " " + varNames.get(i);
    }
    dataInfo += System.getProperty("line.separator") + System.getProperty("line.separator") + "Trajectories:";
    DateTimeFormatter format = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:00");
    for (TrajectoryInfo aTrajInfo : trajInfos) {
        dataInfo += System.getProperty("line.separator") + "  " + format.format(aTrajInfo.startTime)
                + "  " + String.valueOf(aTrajInfo.startLat) + "  " + String.valueOf(aTrajInfo.startLon)
                + "  " + String.valueOf(aTrajInfo.startHeight);
    }

    dataInfo += System.getProperty("line.separator") + super.generateInfoText();

    return dataInfo;
}
 

@Override
public boolean isValid(Object object, ConstraintValidatorContext constraintContext) {
    if (object == null) {
        return true;
    } else if (object instanceof String) {

        for (String pattern : patterns) {
            try {
                DateTimeFormatter.ofPattern(pattern).parse(String.valueOf(object));
                return true;
            } catch (Throwable e) {
                // We do not care about this one, since there might be more than one format
            }
        }
        return false;
    } else {
        return object instanceof Long;
    }
}
 

@Test(dataProvider="LocalWeekBasedYearPatterns")
public void test_parse_WeekBasedYear(String pattern, String text, int pos, int expectedPos, LocalDate expectedValue) {
    ParsePosition ppos = new ParsePosition(pos);
    DateTimeFormatterBuilder b = new DateTimeFormatterBuilder().appendPattern(pattern);
    DateTimeFormatter dtf = b.toFormatter(locale);
    TemporalAccessor parsed = dtf.parseUnresolved(text, ppos);
    if (ppos.getErrorIndex() != -1) {
        assertEquals(ppos.getErrorIndex(), expectedPos);
    } else {
        WeekFields weekDef = WeekFields.of(locale);
        assertEquals(ppos.getIndex(), expectedPos, "Incorrect ending parse position");
        assertEquals(parsed.isSupported(weekDef.dayOfWeek()), pattern.indexOf('e') >= 0);
        assertEquals(parsed.isSupported(weekDef.weekOfWeekBasedYear()), pattern.indexOf('w') >= 0);
        assertEquals(parsed.isSupported(weekDef.weekBasedYear()), pattern.indexOf('Y') >= 0);
        // ensure combination resolves into a date
        LocalDate result = LocalDate.parse(text, dtf);
        assertEquals(result, expectedValue, "LocalDate incorrect for " + pattern + ", weekDef: " + weekDef);
    }
}
 

@Test(dataProvider="sample_isoOffsetTime")
public void test_print_isoOffsetTime(
        Integer hour, Integer min, Integer sec, Integer nano, String offsetId, String zoneId,
        String expected, Class<?> expectedEx) {
    TemporalAccessor test = buildAccessor(null, null, null, hour, min, sec, nano, offsetId, zoneId);
    if (expectedEx == null) {
        assertEquals(DateTimeFormatter.ISO_OFFSET_TIME.format(test), expected);
    } else {
        try {
            DateTimeFormatter.ISO_OFFSET_TIME.format(test);
            fail();
        } catch (Exception ex) {
            assertTrue(expectedEx.isInstance(ex));
        }
    }
}
 

private void parse(DateTimeFormatter fmt,
                   String zid, String expected, String text,
                   Locale locale, TextStyle style, boolean ci) {
    if (ci) {
        text = text.toUpperCase();
    }
    String ret = fmt.parse(text, TemporalQueries.zone()).getId();
    // TBD: need an excluding list
    // assertEquals(...);
    if (ret.equals(expected) ||
        ret.equals(zid) ||
        ret.equals(ZoneName.toZid(zid)) ||
        ret.equals(expected.replace("UTC", "UCT"))) {
        return;
    }
    System.out.printf("[%-5s %s %s %16s] %24s -> %s(%s)%n",
                      locale.toString(),
                      ci ? "ci" : "  ",
                      style == TextStyle.FULL ? " full" :"short",
                      zid, text, ret, expected);
}
 

@Test(dataProvider="resolveOneToField")
public void test_resolveOneToField(TemporalField field1, long value1,
                                   TemporalField expectedField1, Long expectedValue1,
                                   TemporalField expectedField2, Long expectedValue2) {
    String str = Long.toString(value1);
    DateTimeFormatter f = new DateTimeFormatterBuilder().appendValue(field1).toFormatter();

    TemporalAccessor accessor = f.parse(str);
    assertEquals(accessor.query(TemporalQueries.localDate()), null);
    assertEquals(accessor.query(TemporalQueries.localTime()), null);
    if (expectedField1 != null) {
        assertEquals(accessor.isSupported(expectedField1), true);
        assertEquals(accessor.getLong(expectedField1), expectedValue1.longValue());
    }
    if (expectedField2 != null) {
        assertEquals(accessor.isSupported(expectedField2), true);
        assertEquals(accessor.getLong(expectedField2), expectedValue2.longValue());
    }
}
 

@Test(dataProvider="ReducedWithChrono")
public void test_reducedWithChronoYear(ChronoLocalDate date) {
    Chronology chrono = date.getChronology();
    DateTimeFormatter df
            = new DateTimeFormatterBuilder().appendValueReduced(YEAR, 2, 2, LocalDate.of(2000, 1, 1))
            .toFormatter()
            .withChronology(chrono);
    int expected = date.get(YEAR);
    String input = df.format(date);

    ParsePosition pos = new ParsePosition(0);
    TemporalAccessor parsed = df.parseUnresolved(input, pos);
    int actual = parsed.get(YEAR);
    assertEquals(actual, expected,
            String.format("Wrong date parsed, chrono: %s, input: %s",
            chrono, input));

}
 

@Test(dataProvider="weekFields")
public void test_parse_resolve_localizedWoyDow(DayOfWeek firstDayOfWeek, int minDays) {
    LocalDate date = LocalDate.of(2012, 12, 15);
    WeekFields week = WeekFields.of(firstDayOfWeek, minDays);
    TemporalField dowField = week.dayOfWeek();
    TemporalField woyField = week.weekOfYear();

    for (int i = 1; i <= 60; i++) {
        DateTimeFormatter f = new DateTimeFormatterBuilder()
                .appendValue(YEAR).appendLiteral(':')
                .appendValue(MONTH_OF_YEAR).appendLiteral(':')
                .appendValue(woyField).appendLiteral(':')
                .appendValue(dowField).toFormatter();
        String str = date.getYear() + ":" + date.getMonthValue() + ":" +
                date.get(woyField) + ":" + date.get(dowField);
        LocalDate parsed = LocalDate.parse(str, f);
        assertEquals(parsed, date, " :: " + str + " " + i);

        date = date.plusDays(1);
    }
}
 

@VisibleForTesting
String currentTimestamp() {
    final long currentTimeNanos = nanoTimeSupplier.getAsLong();

    if (nextUpdateNanos - currentTimeNanos > 0) {
        return timestamp;
    }

    final Instant now = instantSupplier.get();

    // The next time we need to update our formatted timestamp is the next time System.nanoTime()
    // equals the following second. We can determine this by adding one second to our current
    // nanoTime minus the nanos part of the current system time (i.e., the number of nanos since the
    // last second).
    nextUpdateNanos = currentTimeNanos - now.getNano() + NANOS_IN_SECOND;

    return timestamp = DateTimeFormatter.RFC_1123_DATE_TIME.format(
            ZonedDateTime.ofInstant(now, ZoneOffset.UTC));
}
 

@Test(dataProvider="sample_isoLocalDateTime")
public void test_print_isoLocalDateTime(
        Integer year, Integer month, Integer day,
        Integer hour, Integer min, Integer sec, Integer nano, String offsetId, String zoneId,
        String expected, Class<?> expectedEx) {
    TemporalAccessor test = buildAccessor(year, month, day, hour, min, sec, nano, offsetId, zoneId);
    if (expectedEx == null) {
        assertEquals(DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(test), expected);
    } else {
        try {
            DateTimeFormatter.ISO_LOCAL_DATE_TIME.format(test);
            fail();
        } catch (Exception ex) {
            assertTrue(expectedEx.isInstance(ex));
        }
    }
}
 

/**
 * function to convert the time from UTC to local TimeZone
 * @param expiryTime    :   expiry time in UTC timezone
 * @return  Date        :   converted datetime to local timezonne
 */
private static Date getConvertedDateTime(String expiryTime) {
    try {
        final String DATE_FORMAT = "yyyy-MM-dd'T'HH:mm:ss'Z'";
        DateTimeFormatter format = DateTimeFormatter.ofPattern(DATE_FORMAT);
        LocalDateTime ldt = LocalDateTime.parse(expiryTime, format);
        ZoneId fromZoneId = ZoneId.of(TimeZone.getTimeZone("UTC").getID());
        ZonedDateTime fromZoneDateTime = ldt.atZone(fromZoneId);
        ZoneId currentZoneId = TimeZone.getDefault().toZoneId();
        ZonedDateTime zonedDateTime = fromZoneDateTime.withZoneSameInstant(currentZoneId);
        return new SimpleDateFormat(DATE_FORMAT, Locale.US).parse(format.format(zonedDateTime));
    } catch(Exception ex) {
        ex.printStackTrace();
    }

    return null;
}
 

/**
 * Map db info into a list with filters views beans with projects
 *
 * @param filtersWithProjects list of filters db with projects
 * @return list with a filter resume response bean
 */
public static List<FilterResponse> mapFilterListingFromDB(
        Map<ContentFilter, List<ContentProject>> filtersWithProjects) {
    return filtersWithProjects.entrySet().stream()
            .map(e -> {
                ContentFilter filter = e.getKey();
                List<ContentProject> projects = e.getValue();

                FilterResponse contentFilterResponse = new FilterResponse();
                contentFilterResponse.setId(filter.getId());
                contentFilterResponse.setName(filter.getName());
                contentFilterResponse.setEntityType(filter.getEntityType().getLabel());
                contentFilterResponse.setMatcher(filter.getCriteria().getMatcher().getLabel());
                contentFilterResponse.setCriteriaKey(filter.getCriteria().getField());
                // If we have a date as a criteria value we need to format it with the current user timezone
                if (filter.getCriteria().getField().equals("issue_date")) {
                    DateTimeFormatter timeFormatter = DateTimeFormatter.ISO_DATE_TIME;
                    OffsetDateTime offsetDateTime = OffsetDateTime.parse(
                            filter.getCriteria().getValue(), timeFormatter
                    );
                    Date criteriaValueDate = Date.from(Instant.from(offsetDateTime));

                    contentFilterResponse.setCriteriaValue(ViewHelper.getInstance().renderDate(criteriaValueDate));
                }
                else {
                    contentFilterResponse.setCriteriaValue(filter.getCriteria().getValue());
                }
                contentFilterResponse.setRule(filter.getRule().getLabel());
                contentFilterResponse.setProjects(
                        projects.stream()
                                .map(p -> new ImmutablePair<String, String>(p.getLabel(), p.getName()))
                                .collect(Collectors.toList())
                );
                return contentFilterResponse;
            })
            .collect(Collectors.toList());
}
 

@Test
public void test_adjacent_strict_firstFixedWidth() throws Exception {
    // succeeds because both number elements are fixed width
    DateTimeFormatter f = builder.appendValue(HOUR_OF_DAY, 2).appendValue(MINUTE_OF_HOUR, 2).appendLiteral('9').toFormatter(Locale.UK);
    ParsePosition pp = new ParsePosition(0);
    TemporalAccessor parsed = f.parseUnresolved("12309", pp);
    assertEquals(pp.getErrorIndex(), -1);
    assertEquals(pp.getIndex(), 5);
    assertEquals(parsed.getLong(HOUR_OF_DAY), 12L);
    assertEquals(parsed.getLong(MINUTE_OF_HOUR), 30L);
}
 

private void renderFooter(HTMLElement parent) throws IOException {
	HTMLElement p = parent.p();
	p.text("Report created by ");
	p.a("https://javaalmanac.io/").text("javaalmanac.io");
	p.text(" on ");
	p.text(LocalDate.now().format(DateTimeFormatter.ISO_DATE));
}
 

private String formatTimestamp(Timestamp timestamp,boolean withColor) {
    if (timeFormatter == null) {
        return "";
    }

    DateTimeFormatter formatter = DateTimeFormatter.ofPattern(DEFAULT_TIMESTAMP_PATTERN);
    LocalDateTime localDateTime = LocalDateTime.from(formatter.parse(timestamp.toString()));

    return (withColor ?
            ansi().fgBright(BLACK).a(localDateTime).reset().toString() :
            localDateTime) + " ";
}
 

private DateTimeFormatter getFormatter(Locale locale, TextStyle style, boolean ci) {
    DateTimeFormatterBuilder db = new DateTimeFormatterBuilder();
    if (ci) {
        db = db.parseCaseInsensitive();
    }
    return db.appendZoneText(style)
             .toFormatter(locale)
             .withDecimalStyle(DecimalStyle.of(locale));
}
 

@Test(dataProvider = "instantZones")
public void test_parse_instantZones_supported(DateTimeFormatter formatter, String text, ZonedDateTime expected) {
    TemporalAccessor actual = formatter.parse(text);
    assertEquals(actual.isSupported(INSTANT_SECONDS), true);
    assertEquals(actual.isSupported(EPOCH_DAY), true);
    assertEquals(actual.isSupported(SECOND_OF_DAY), true);
    assertEquals(actual.isSupported(NANO_OF_SECOND), true);
    assertEquals(actual.isSupported(MICRO_OF_SECOND), true);
    assertEquals(actual.isSupported(MILLI_OF_SECOND), true);
}
 

@Test(dataProvider="resolveThreeToDate")
public void test_resolveThreeToDate(TemporalField field1, long value1,
                                  TemporalField field2, long value2,
                                  TemporalField field3, long value3,
                                  LocalDate expectedDate) {
    String str = value1 + " " + value2 + " " + value3;
    DateTimeFormatter f = new DateTimeFormatterBuilder()
            .appendValue(field1).appendLiteral(' ')
            .appendValue(field2).appendLiteral(' ')
            .appendValue(field3).toFormatter();

    TemporalAccessor accessor = f.parse(str);
    assertEquals(accessor.query(TemporalQueries.localDate()), expectedDate);
    assertEquals(accessor.query(TemporalQueries.localTime()), null);
}
 

@Test
public void test_parse_fromField_SecondOfDay_NanoOfSecond() {
    DateTimeFormatter fmt = new DateTimeFormatterBuilder()
        .appendValue(SECOND_OF_DAY).appendLiteral('.').appendValue(NANO_OF_SECOND).toFormatter();
    TemporalAccessor acc = fmt.parse("864.123456789");
    assertEquals(acc.isSupported(SECOND_OF_DAY), true);
    assertEquals(acc.isSupported(NANO_OF_SECOND), true);
    assertEquals(acc.isSupported(MICRO_OF_SECOND), true);
    assertEquals(acc.isSupported(MILLI_OF_SECOND), true);
    assertEquals(acc.getLong(SECOND_OF_DAY), 864L);
    assertEquals(acc.getLong(NANO_OF_SECOND), 123456789L);
    assertEquals(acc.getLong(MICRO_OF_SECOND), 123456L);
    assertEquals(acc.getLong(MILLI_OF_SECOND), 123L);
}
 

public static Map<String, String> getOffsetsFromColumns(TableRuntimeContext tableContext, Map<String, Field> fields) throws StageException {
  final Map<String, String> offsets = new HashMap<>();
  for (String offsetColumn : tableContext.getSourceTableContext().getOffsetColumns()) {
    Field field = fields.get(offsetColumn);
    String value;

    if(field.getValue() == null) {
      throw new StageException(JdbcErrors.JDBC_408, offsetColumn);
    }

    if (field.getType().isOneOf(Field.Type.DATE, Field.Type.TIME)) {
      //For DATE/TIME fields store the long in string format and convert back to date when using offset
      //in query
      value = String.valueOf(field.getValueAsDatetime().getTime());
    } else if (field.getType() == Field.Type.DATETIME) {
      //DATETIME is similar to above, but there may also be a nanosecond portion (stored in field attr)
      String nanosAttr = field.getAttribute(JdbcUtil.FIELD_ATTRIBUTE_NANOSECONDS);
      int nanos;
      if (StringUtils.isNotBlank(nanosAttr) && StringUtils.isNumeric(nanosAttr)) {
        nanos = Integer.parseInt(nanosAttr);
      } else {
        nanos = 0;
      }
      value = TableContextUtil.getOffsetValueForTimestampParts(field.getValueAsDatetime().getTime(), nanos);
    } else if(field.getType() == Field.Type.ZONED_DATETIME) {
      value = field.getValueAsZonedDateTime().format(DateTimeFormatter.ISO_OFFSET_DATE_TIME);
    } else {
      value = field.getValueAsString();
    }
    offsets.put(offsetColumn, value);
  }
  return offsets;
}
 

/**
 * Build a list of human readable ZoneId strings to display in the ComboBox.
 *
 * @return An ObservableList<String> of human readable ZoneId strings.
 */
private static ObservableList<String> getZoneIds() {
    final DateTimeFormatter zf = DateTimeFormatter.ofPattern("Z");
    final Instant instant = Instant.now();
    final Set<String> zoneSet = ZoneId.getAvailableZoneIds();
    final List<ZoneId> zoned = new ArrayList<>();
    zoneSet.stream().map(ZoneId::of).forEach(zoned::add);

    Collections.sort(zoned, (final ZoneId zi1, final ZoneId zi2) -> {
        final ZonedDateTime z1 = ZonedDateTime.ofInstant(instant, zi1);
        final ZonedDateTime z2 = ZonedDateTime.ofInstant(instant, zi2);
        final int off1 = z1.getOffset().getTotalSeconds();
        final int off2 = z2.getOffset().getTotalSeconds();
        if (off1 != off2) {
            return off1 - off2;
        }

        return zi1.getId().compareTo(zi2.getId());
    });

    final ObservableList<String> zones = FXCollections.observableArrayList();
    zoned.stream().forEach(zi -> {
        final ZonedDateTime zdt = ZonedDateTime.ofInstant(instant, zi);
        zones.add(String.format("%s %s [%s]", zdt.format(zf), zi.getId(), zi.getDisplayName(TextStyle.FULL, Locale.getDefault())));
    });

    return zones;
}
 

@Test
public void test_resolverFields_ignoreCrossCheck() throws Exception {
    DateTimeFormatter base = new DateTimeFormatterBuilder()
            .appendValue(YEAR).appendLiteral('-').appendValue(DAY_OF_YEAR).appendLiteral('-')
            .appendValue(DAY_OF_WEEK).toFormatter();
    DateTimeFormatter f = base.withResolverFields(YEAR, DAY_OF_YEAR);
    try {
        base.parse("2012-321-1", LocalDate::from);  // wrong day-of-week
        fail();
    } catch (DateTimeException ex) {
        // expected, should fail in cross-check of day-of-week
    }
    LocalDate parsed = f.parse("2012-321-1", LocalDate::from);  // ignored wrong day-of-week
    assertEquals(parsed, LocalDate.of(2012, 11, 16));
}
 

@Test
public void test_parse_fromField_SecondOfDay() {
    DateTimeFormatter fmt = new DateTimeFormatterBuilder()
        .appendValue(SECOND_OF_DAY).toFormatter();
    TemporalAccessor acc = fmt.parse("864");
    assertEquals(acc.isSupported(SECOND_OF_DAY), true);
    assertEquals(acc.isSupported(NANO_OF_SECOND), true);
    assertEquals(acc.isSupported(MICRO_OF_SECOND), true);
    assertEquals(acc.isSupported(MILLI_OF_SECOND), true);
    assertEquals(acc.getLong(SECOND_OF_DAY), 864L);
    assertEquals(acc.getLong(NANO_OF_SECOND), 0L);
    assertEquals(acc.getLong(MICRO_OF_SECOND), 0L);
    assertEquals(acc.getLong(MILLI_OF_SECOND), 0L);
}
 

@Test(expectedExceptions=ParseException.class)
public void test_toFormat_parseObject_String_parseErrorLongText() throws Exception {
    DateTimeFormatter test = fmt.withLocale(Locale.ENGLISH).withDecimalStyle(DecimalStyle.STANDARD);
    Format format = test.toFormat();
    try {
        format.parseObject("ONEXXX67890123456789012345678901234567890123456789012345678901234567890123456789");
    } catch (DateTimeParseException ex) {
        assertEquals(ex.getMessage().contains("ONEXXX6789012345678901234567890123456789012345678901234567890123..."), true);
        assertEquals(ex.getParsedString(), "ONEXXX67890123456789012345678901234567890123456789012345678901234567890123456789");
        assertEquals(ex.getErrorIndex(), 3);
        throw ex;
    }
}
 

void testLocale(Locale tl) {
    System.out.println("Locale:" + tl);
    DateTimeFormatter inputDateTimeFormat = DateTimeFormatter
            .ofPattern(pattern)
            .withLocale(tl);
    System.out.println("Parse result: " + inputDateTimeFormat.parse(inputDate));
}
 

@Test
public void test_resolverFields_emptyList() throws Exception {
    DateTimeFormatter f = new DateTimeFormatterBuilder()
            .appendValue(YEAR).toFormatter().withResolverFields();
    TemporalAccessor parsed = f.parse("2012");
    assertEquals(parsed.isSupported(YEAR), false);  // not in the list of resolverFields
}
 

@Test(dataProvider="resolveTwoToTime")
public void test_resolveTwoToTime(TemporalField field1, long value1,
                            TemporalField field2, long value2,
                            LocalTime expectedTime) {
    String str = value1 + " " + value2;
    DateTimeFormatter f = new DateTimeFormatterBuilder()
            .appendValue(field1).appendLiteral(' ')
            .appendValue(field2).toFormatter();

    TemporalAccessor accessor = f.parse(str);
    assertEquals(accessor.query(TemporalQueries.localDate()), null);
    assertEquals(accessor.query(TemporalQueries.localTime()), expectedTime);
}
 

@Test
public void givenValidator_whenInValidDatePassed_ThenFalse() {
    DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("uuuu-MM-dd", Locale.US)
        .withResolverStyle(ResolverStyle.STRICT);
    DateValidator validator = new DateValidatorUsingDateTimeFormatter(dateFormatter);
    
    assertFalse(validator.isValid("2019-02-30"));
}
 

@Test
@UseDataProvider("data_week")
public void test_parse_weeks_SMART(LocalDate date, DayOfWeek dow, int week, int wby) {
    DateTimeFormatter f = new DateTimeFormatterBuilder()
            .appendValue(IsoFields.WEEK_BASED_YEAR).appendLiteral('-')
            .appendValue(IsoFields.WEEK_OF_WEEK_BASED_YEAR).appendLiteral('-')
            .appendValue(DAY_OF_WEEK)
            .toFormatter().withResolverStyle(ResolverStyle.SMART);
    LocalDate parsed = LocalDate.parse(wby + "-" + week + "-" + dow.getValue(), f);
    assertEquals(parsed, date);
}
 

@Test
public void shouldConvertCyclesToResourceNamesWithNoEpoch() {
    final int epoch = 0;
    final RollingResourcesCache cache =
            new RollingResourcesCache(RollCycles.DAILY, epoch, File::new, File::getName);

    final int cycle = RollCycles.DAILY.current(System::currentTimeMillis, 0);
    assertCorrectConversion(cache, cycle, Instant.now(),
            DateTimeFormatter.ofPattern("yyyyMMdd").withZone(ZoneId.of("GMT")));
}