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java.time.zone.ZoneRules.getValidOffsets()方法的使用及代码示例

转载 作者：知者 更新时间：2024-03-16 16:28:40 26 4
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本文整理了Java中java.time.zone.ZoneRules.getValidOffsets()方法的一些代码示例，展示了ZoneRules.getValidOffsets()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ZoneRules.getValidOffsets()方法的具体详情如下：
包路径：java.time.zone.ZoneRules
类名称：ZoneRules
方法名：getValidOffsets

ZoneRules.getValidOffsets介绍

[英]Gets the offset applicable at the specified local date-time in these rules.

The mapping from a local date-time to an offset is not straightforward. There are three cases:

  • Normal, with one valid offset. For the vast majority of the year, the normal case applies, where there is a single valid offset for the local date-time.
  • Gap, with zero valid offsets. This is when clocks jump forward typically due to the spring daylight savings change from "winter" to "summer". In a gap there are local date-time values with no valid offset.
  • Overlap, with two valid offsets. This is when clocks are set back typically due to the autumn daylight savings change from "summer" to "winter". In an overlap there are local date-time values with two valid offsets.

Thus, for any given local date-time there can be zero, one or two valid offsets. This method returns that list of valid offsets, which is a list of size 0, 1 or 2. In the case where there are two offsets, the earlier offset is returned at index 0 and the later offset at index 1.

There are various ways to handle the conversion from a LocalDateTime. One technique, using this method, would be:

List validOffsets = rules.getOffset(localDT); 
if (validOffsets.size() == 1) { 
// Normal case: only one valid offset 
zoneOffset = validOffsets.get(0); 
} else { 
// Gap or Overlap: determine what to do from transition (which will be non-null) 
ZoneOffsetTransition trans = rules.getTransition(localDT); 
}

In theory, it is possible for there to be more than two valid offsets. This would happen if clocks to be put back more than once in quick succession. This has never happened in the history of time-zones and thus has no special handling. However, if it were to happen, then the list would return more than 2 entries.
[中]获取在这些规则中指定的本地日期时间适用的偏移量。
从本地日期时间到偏移量的映射并不简单。有三种情况：
*正常，有一个有效偏移。对于一年中的绝大多数时间，正常情况适用，当地日期和时间只有一个有效的偏移量。
*间隙，具有零有效偏移。这通常是由于春季夏令时从“冬季”变为“夏季”，时钟向前跳的时候。在间隙中，存在没有有效偏移的本地日期时间值。
*重叠，具有两个有效偏移。这是因为秋季夏令时从“夏季”变为“冬季”，时钟通常会被延迟。在重叠中，有两个有效偏移的本地日期时间值。
因此，对于任何给定的本地日期时间，都可能有零个、一个或两个有效偏移。此方法返回有效偏移的列表，即大小为0、1或2的列表。如果有两个偏移量，则在索引0处返回较早的偏移量，在索引1处返回较晚的偏移量。
有多种方法可以处理LocalDateTime的转换。使用这种方法的一种技术是：

List validOffsets = rules.getOffset(localDT); 
if (validOffsets.size() == 1) { 
// Normal case: only one valid offset 
zoneOffset = validOffsets.get(0); 
} else { 
// Gap or Overlap: determine what to do from transition (which will be non-null) 
ZoneOffsetTransition trans = rules.getTransition(localDT); 
}

理论上，可能存在两个以上的有效偏移量。如果时钟连续快速倒转不止一次，就会发生这种情况。这在时区历史上从未发生过，因此没有特殊处理。但是，如果发生这种情况，列表将返回两个以上的条目。

代码示例

代码示例来源：origin: prestodb/presto

@Test
  public void testDateToTimestampCoercion()
  {
    // allow running tests with a connector that supports TIMESTAMP but not DATE

    // ordinary date
    MaterializedResult rows = h2QueryRunner.execute(TEST_SESSION, "SELECT DATE '2018-01-13'", ImmutableList.of(TIMESTAMP));
    assertEquals(rows.getOnlyValue(), LocalDate.of(2018, 1, 13).atStartOfDay());

    // date, which midnight was skipped in JVM zone
    LocalDate forwardOffsetChangeAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(forwardOffsetChangeAtMidnightInJvmZone.atStartOfDay()).size() == 0, "This test assumes certain JVM time zone");
    rows = h2QueryRunner.execute(TEST_SESSION, DateTimeFormatter.ofPattern("'SELECT DATE '''uuuu-MM-dd''").format(forwardOffsetChangeAtMidnightInJvmZone), ImmutableList.of(TIMESTAMP));
    assertEquals(rows.getOnlyValue(), forwardOffsetChangeAtMidnightInJvmZone.atStartOfDay());
  }
}

代码示例来源：origin: prestodb/presto

@Test
  public void testLocallyUnrepresentableTimeLiterals()
  {
    LocalDateTime localTimeThatDidNotExist = LocalDateTime.of(2017, 4, 2, 2, 10);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localTimeThatDidNotExist).isEmpty(), "This test assumes certain JVM time zone");
    // This tests that both Presto runner and H2 can return TIMESTAMP value that never happened in JVM's zone (e.g. is not representable using java.sql.Timestamp)
    @Language("SQL") String sql = DateTimeFormatter.ofPattern("'SELECT TIMESTAMP '''uuuu-MM-dd HH:mm:ss''").format(localTimeThatDidNotExist);
    assertEquals(computeScalar(sql), localTimeThatDidNotExist); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner

    LocalDate localDateThatDidNotHaveMidnight = LocalDate.of(1970, 1, 1);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localDateThatDidNotHaveMidnight.atStartOfDay()).isEmpty(), "This test assumes certain JVM time zone");
    // This tests that both Presto runner and H2 can return DATE value for a day which midnight never happened in JVM's zone (e.g. is not exactly representable using java.sql.Date)
    sql = DateTimeFormatter.ofPattern("'SELECT DATE '''uuuu-MM-dd''").format(localDateThatDidNotHaveMidnight);
    assertEquals(computeScalar(sql), localDateThatDidNotHaveMidnight); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner

    LocalTime localTimeThatDidNotOccurOn19700101 = LocalTime.of(0, 10);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localTimeThatDidNotOccurOn19700101.atDate(LocalDate.ofEpochDay(0))).isEmpty(), "This test assumes certain JVM time zone");
    checkState(!Objects.equals(java.sql.Time.valueOf(localTimeThatDidNotOccurOn19700101).toLocalTime(), localTimeThatDidNotOccurOn19700101), "This test assumes certain JVM time zone");
    sql = DateTimeFormatter.ofPattern("'SELECT TIME '''HH:mm:ss''").format(localTimeThatDidNotOccurOn19700101);
    assertEquals(computeScalar(sql), localTimeThatDidNotOccurOn19700101); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner
  }
}

代码示例来源：origin: prestodb/presto

@Test
public void testDate()
{
  // Note: there is identical test for PostgreSQL
  ZoneId jvmZone = ZoneId.systemDefault();
  checkState(jvmZone.getId().equals("America/Bahia_Banderas"), "This test assumes certain JVM time zone");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
  verify(jvmZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInJvmZone.atStartOfDay()).isEmpty());
  ZoneId someZone = ZoneId.of("Europe/Vilnius");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInSomeZone = LocalDate.of(1983, 4, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInSomeZone.atStartOfDay()).isEmpty());
  LocalDate dateOfLocalTimeChangeBackwardAtMidnightInSomeZone = LocalDate.of(1983, 10, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeBackwardAtMidnightInSomeZone.atStartOfDay().minusMinutes(1)).size() == 2);
  DataTypeTest testCases = DataTypeTest.create()
      .addRoundTrip(dateDataType(), LocalDate.of(1952, 4, 3)) // before epoch
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 1, 1))
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 2, 3))
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 7, 1)) // summer on northern hemisphere (possible DST)
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 1, 1)) // winter on northern hemisphere (possible DST on southern hemisphere)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInJvmZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInSomeZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeBackwardAtMidnightInSomeZone);
  for (String timeZoneId : ImmutableList.of(UTC_KEY.getId(), jvmZone.getId(), someZone.getId())) {
    Session session = Session.builder(getQueryRunner().getDefaultSession())
        .setTimeZoneKey(TimeZoneKey.getTimeZoneKey(timeZoneId))
        .build();
    testCases.execute(getQueryRunner(), session, mysqlCreateAndInsert("tpch.test_date"));
    testCases.execute(getQueryRunner(), session, prestoCreateAsSelect("test_date"));
  }
}

代码示例来源：origin: prestodb/presto

@Test
public void testDate()
{
  // Note: there is identical test for MySQL
  ZoneId jvmZone = ZoneId.systemDefault();
  checkState(jvmZone.getId().equals("America/Bahia_Banderas"), "This test assumes certain JVM time zone");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
  verify(jvmZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInJvmZone.atStartOfDay()).isEmpty());
  ZoneId someZone = ZoneId.of("Europe/Vilnius");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInSomeZone = LocalDate.of(1983, 4, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInSomeZone.atStartOfDay()).isEmpty());
  LocalDate dateOfLocalTimeChangeBackwardAtMidnightInSomeZone = LocalDate.of(1983, 10, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeBackwardAtMidnightInSomeZone.atStartOfDay().minusMinutes(1)).size() == 2);
  DataTypeTest testCases = DataTypeTest.create()
      .addRoundTrip(dateDataType(), LocalDate.of(1952, 4, 3)) // before epoch
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 1, 1))
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 2, 3))
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 7, 1)) // summer on northern hemisphere (possible DST)
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 1, 1)) // winter on northern hemisphere (possible DST on southern hemisphere)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInJvmZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInSomeZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeBackwardAtMidnightInSomeZone);
  for (String timeZoneId : ImmutableList.of(UTC_KEY.getId(), jvmZone.getId(), someZone.getId())) {
    Session session = Session.builder(getQueryRunner().getDefaultSession())
        .setTimeZoneKey(TimeZoneKey.getTimeZoneKey(timeZoneId))
        .build();
    testCases.execute(getQueryRunner(), session, postgresCreateAndInsert("tpch.test_date"));
    testCases.execute(getQueryRunner(), session, prestoCreateAsSelect("test_date"));
  }
}

代码示例来源：origin: de.adorsys.psd2/xs2a-impl

public Balance mapToBalance(Xs2aBalance balance) {
  Balance target = new Balance();
  BeanUtils.copyProperties(balance, target);
  target.setBalanceAmount(amountModelMapper.mapToAmount(balance.getBalanceAmount()));
  Optional.ofNullable(balance.getBalanceType())
    .ifPresent(balanceType -> target.setBalanceType(BalanceType.fromValue(balanceType.getValue())));
  Optional.ofNullable(balance.getLastChangeDateTime())
    .ifPresent(lastChangeDateTime -> {
      List<ZoneOffset> validOffsets = ZoneId.systemDefault().getRules().getValidOffsets(lastChangeDateTime);
      target.setLastChangeDateTime(lastChangeDateTime.atOffset(validOffsets.get(0)));
    });
  return target;
}

代码示例来源：origin: adorsys/xs2a

public Balance mapToBalance(Xs2aBalance balance) {
  Balance target = new Balance();
  BeanUtils.copyProperties(balance, target);
  target.setBalanceAmount(amountModelMapper.mapToAmount(balance.getBalanceAmount()));
  Optional.ofNullable(balance.getBalanceType())
    .ifPresent(balanceType -> target.setBalanceType(BalanceType.fromValue(balanceType.getValue())));
  Optional.ofNullable(balance.getLastChangeDateTime())
    .ifPresent(lastChangeDateTime -> {
      List<ZoneOffset> validOffsets = ZoneId.systemDefault().getRules().getValidOffsets(lastChangeDateTime);
      target.setLastChangeDateTime(lastChangeDateTime.atOffset(validOffsets.get(0)));
    });
  return target;
}

代码示例来源：origin: de.adorsys.aspsp/xs2a-impl

public Balance mapToBalance(Xs2aBalance balance) {
  Balance target = new Balance();
  BeanUtils.copyProperties(balance, target);
  target.setBalanceAmount(AmountModelMapper.mapToAmount(balance.getBalanceAmount()));
  Optional.ofNullable(balance.getBalanceType())
    .ifPresent(balanceType -> target.setBalanceType(BalanceType.fromValue(balanceType.getValue())));
  Optional.ofNullable(balance.getLastChangeDateTime())
    .ifPresent(lastChangeDateTime -> {
      List<ZoneOffset> validOffsets = ZoneId.systemDefault().getRules().getValidOffsets(lastChangeDateTime);
      target.setLastChangeDateTime(lastChangeDateTime.atOffset(validOffsets.get(0)));
    });
  return target;
}

代码示例来源：origin: prestosql/presto

@Test
  public void testDateToTimestampCoercion()
  {
    // allow running tests with a connector that supports TIMESTAMP but not DATE

    // ordinary date
    MaterializedResult rows = h2QueryRunner.execute(TEST_SESSION, "SELECT DATE '2018-01-13'", ImmutableList.of(TIMESTAMP));
    assertEquals(rows.getOnlyValue(), LocalDate.of(2018, 1, 13).atStartOfDay());

    // date, which midnight was skipped in JVM zone
    LocalDate forwardOffsetChangeAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(forwardOffsetChangeAtMidnightInJvmZone.atStartOfDay()).size() == 0, "This test assumes certain JVM time zone");
    rows = h2QueryRunner.execute(TEST_SESSION, DateTimeFormatter.ofPattern("'SELECT DATE '''uuuu-MM-dd''").format(forwardOffsetChangeAtMidnightInJvmZone), ImmutableList.of(TIMESTAMP));
    assertEquals(rows.getOnlyValue(), forwardOffsetChangeAtMidnightInJvmZone.atStartOfDay());
  }
}

代码示例来源：origin: com.facebook.presto/presto-tests

@Test
  public void testDateToTimestampCoercion()
  {
    // allow running tests with a connector that supports TIMESTAMP but not DATE

    // ordinary date
    MaterializedResult rows = h2QueryRunner.execute(TEST_SESSION, "SELECT DATE '2018-01-13'", ImmutableList.of(TIMESTAMP));
    assertEquals(rows.getOnlyValue(), LocalDate.of(2018, 1, 13).atStartOfDay());

    // date, which midnight was skipped in JVM zone
    LocalDate forwardOffsetChangeAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(forwardOffsetChangeAtMidnightInJvmZone.atStartOfDay()).size() == 0, "This test assumes certain JVM time zone");
    rows = h2QueryRunner.execute(TEST_SESSION, DateTimeFormatter.ofPattern("'SELECT DATE '''uuuu-MM-dd''").format(forwardOffsetChangeAtMidnightInJvmZone), ImmutableList.of(TIMESTAMP));
    assertEquals(rows.getOnlyValue(), forwardOffsetChangeAtMidnightInJvmZone.atStartOfDay());
  }
}

代码示例来源：origin: com.github.seratch/java-time-backport

List<ZoneOffset> validOffsets = rules.getValidOffsets(isoLDT);
ZoneOffset offset;
if (validOffsets.size() == 1) {

代码示例来源：origin: com.github.seratch/java-time-backport

List<ZoneOffset> validOffsets = rules.getValidOffsets(localDateTime);
ZoneOffset offset;
if (validOffsets.size() == 1) {

代码示例来源：origin: prestosql/presto

@Test
  public void testLocallyUnrepresentableTimeLiterals()
  {
    LocalDateTime localTimeThatDidNotExist = LocalDateTime.of(2017, 4, 2, 2, 10);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localTimeThatDidNotExist).isEmpty(), "This test assumes certain JVM time zone");
    // This tests that both Presto runner and H2 can return TIMESTAMP value that never happened in JVM's zone (e.g. is not representable using java.sql.Timestamp)
    @Language("SQL") String sql = DateTimeFormatter.ofPattern("'SELECT TIMESTAMP '''uuuu-MM-dd HH:mm:ss''").format(localTimeThatDidNotExist);
    assertEquals(computeScalar(sql), localTimeThatDidNotExist); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner

    LocalDate localDateThatDidNotHaveMidnight = LocalDate.of(1970, 1, 1);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localDateThatDidNotHaveMidnight.atStartOfDay()).isEmpty(), "This test assumes certain JVM time zone");
    // This tests that both Presto runner and H2 can return DATE value for a day which midnight never happened in JVM's zone (e.g. is not exactly representable using java.sql.Date)
    sql = DateTimeFormatter.ofPattern("'SELECT DATE '''uuuu-MM-dd''").format(localDateThatDidNotHaveMidnight);
    assertEquals(computeScalar(sql), localDateThatDidNotHaveMidnight); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner

    LocalTime localTimeThatDidNotOccurOn19700101 = LocalTime.of(0, 10);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localTimeThatDidNotOccurOn19700101.atDate(LocalDate.ofEpochDay(0))).isEmpty(), "This test assumes certain JVM time zone");
    checkState(!Objects.equals(java.sql.Time.valueOf(localTimeThatDidNotOccurOn19700101).toLocalTime(), localTimeThatDidNotOccurOn19700101), "This test assumes certain JVM time zone");
    sql = DateTimeFormatter.ofPattern("'SELECT TIME '''HH:mm:ss''").format(localTimeThatDidNotOccurOn19700101);
    assertEquals(computeScalar(sql), localTimeThatDidNotOccurOn19700101); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner
  }
}

代码示例来源：origin: com.facebook.presto/presto-tests

@Test
  public void testLocallyUnrepresentableTimeLiterals()
  {
    LocalDateTime localTimeThatDidNotExist = LocalDateTime.of(2017, 4, 2, 2, 10);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localTimeThatDidNotExist).isEmpty(), "This test assumes certain JVM time zone");
    // This tests that both Presto runner and H2 can return TIMESTAMP value that never happened in JVM's zone (e.g. is not representable using java.sql.Timestamp)
    @Language("SQL") String sql = DateTimeFormatter.ofPattern("'SELECT TIMESTAMP '''uuuu-MM-dd HH:mm:ss''").format(localTimeThatDidNotExist);
    assertEquals(computeScalar(sql), localTimeThatDidNotExist); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner

    LocalDate localDateThatDidNotHaveMidnight = LocalDate.of(1970, 1, 1);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localDateThatDidNotHaveMidnight.atStartOfDay()).isEmpty(), "This test assumes certain JVM time zone");
    // This tests that both Presto runner and H2 can return DATE value for a day which midnight never happened in JVM's zone (e.g. is not exactly representable using java.sql.Date)
    sql = DateTimeFormatter.ofPattern("'SELECT DATE '''uuuu-MM-dd''").format(localDateThatDidNotHaveMidnight);
    assertEquals(computeScalar(sql), localDateThatDidNotHaveMidnight); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner

    LocalTime localTimeThatDidNotOccurOn19700101 = LocalTime.of(0, 10);
    checkState(ZoneId.systemDefault().getRules().getValidOffsets(localTimeThatDidNotOccurOn19700101.atDate(LocalDate.ofEpochDay(0))).isEmpty(), "This test assumes certain JVM time zone");
    checkState(!Objects.equals(java.sql.Time.valueOf(localTimeThatDidNotOccurOn19700101).toLocalTime(), localTimeThatDidNotOccurOn19700101), "This test assumes certain JVM time zone");
    sql = DateTimeFormatter.ofPattern("'SELECT TIME '''HH:mm:ss''").format(localTimeThatDidNotOccurOn19700101);
    assertEquals(computeScalar(sql), localTimeThatDidNotOccurOn19700101); // this tests Presto and the QueryRunner
    assertQuery(sql); // this tests H2QueryRunner
  }
}

代码示例来源：origin: com.facebook.presto/presto-mysql

@Test
public void testDate()
{
  // Note: there is identical test for PostgreSQL
  ZoneId jvmZone = ZoneId.systemDefault();
  checkState(jvmZone.getId().equals("America/Bahia_Banderas"), "This test assumes certain JVM time zone");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
  verify(jvmZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInJvmZone.atStartOfDay()).isEmpty());
  ZoneId someZone = ZoneId.of("Europe/Vilnius");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInSomeZone = LocalDate.of(1983, 4, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInSomeZone.atStartOfDay()).isEmpty());
  LocalDate dateOfLocalTimeChangeBackwardAtMidnightInSomeZone = LocalDate.of(1983, 10, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeBackwardAtMidnightInSomeZone.atStartOfDay().minusMinutes(1)).size() == 2);
  DataTypeTest testCases = DataTypeTest.create()
      .addRoundTrip(dateDataType(), LocalDate.of(1952, 4, 3)) // before epoch
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 1, 1))
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 2, 3))
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 7, 1)) // summer on northern hemisphere (possible DST)
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 1, 1)) // winter on northern hemisphere (possible DST on southern hemisphere)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInJvmZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInSomeZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeBackwardAtMidnightInSomeZone);
  for (String timeZoneId : ImmutableList.of(UTC_KEY.getId(), jvmZone.getId(), someZone.getId())) {
    Session session = Session.builder(getQueryRunner().getDefaultSession())
        .setTimeZoneKey(TimeZoneKey.getTimeZoneKey(timeZoneId))
        .build();
    testCases.execute(getQueryRunner(), session, mysqlCreateAndInsert("tpch.test_date"));
    testCases.execute(getQueryRunner(), session, prestoCreateAsSelect("test_date"));
  }
}

代码示例来源：origin: com.facebook.presto/presto-postgresql

@Test
public void testDate()
{
  // Note: there is identical test for MySQL
  ZoneId jvmZone = ZoneId.systemDefault();
  checkState(jvmZone.getId().equals("America/Bahia_Banderas"), "This test assumes certain JVM time zone");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
  verify(jvmZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInJvmZone.atStartOfDay()).isEmpty());
  ZoneId someZone = ZoneId.of("Europe/Vilnius");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInSomeZone = LocalDate.of(1983, 4, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInSomeZone.atStartOfDay()).isEmpty());
  LocalDate dateOfLocalTimeChangeBackwardAtMidnightInSomeZone = LocalDate.of(1983, 10, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeBackwardAtMidnightInSomeZone.atStartOfDay().minusMinutes(1)).size() == 2);
  DataTypeTest testCases = DataTypeTest.create()
      .addRoundTrip(dateDataType(), LocalDate.of(1952, 4, 3)) // before epoch
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 1, 1))
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 2, 3))
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 7, 1)) // summer on northern hemisphere (possible DST)
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 1, 1)) // winter on northern hemisphere (possible DST on southern hemisphere)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInJvmZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInSomeZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeBackwardAtMidnightInSomeZone);
  for (String timeZoneId : ImmutableList.of(UTC_KEY.getId(), jvmZone.getId(), someZone.getId())) {
    Session session = Session.builder(getQueryRunner().getDefaultSession())
        .setTimeZoneKey(TimeZoneKey.getTimeZoneKey(timeZoneId))
        .build();
    testCases.execute(getQueryRunner(), session, postgresCreateAndInsert("tpch.test_date"));
    testCases.execute(getQueryRunner(), session, prestoCreateAsSelect("test_date"));
  }
}

代码示例来源：origin: prestosql/presto

@Test
public void testDate()
{
  // Note: there is identical test for PostgreSQL
  ZoneId jvmZone = ZoneId.systemDefault();
  checkState(jvmZone.getId().equals("America/Bahia_Banderas"), "This test assumes certain JVM time zone");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
  verify(jvmZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInJvmZone.atStartOfDay()).isEmpty());
  ZoneId someZone = ZoneId.of("Europe/Vilnius");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInSomeZone = LocalDate.of(1983, 4, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInSomeZone.atStartOfDay()).isEmpty());
  LocalDate dateOfLocalTimeChangeBackwardAtMidnightInSomeZone = LocalDate.of(1983, 10, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeBackwardAtMidnightInSomeZone.atStartOfDay().minusMinutes(1)).size() == 2);
  DataTypeTest testCases = DataTypeTest.create()
      .addRoundTrip(dateDataType(), LocalDate.of(1952, 4, 3)) // before epoch
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 1, 1))
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 2, 3))
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 7, 1)) // summer on northern hemisphere (possible DST)
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 1, 1)) // winter on northern hemisphere (possible DST on southern hemisphere)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInJvmZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInSomeZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeBackwardAtMidnightInSomeZone);
  for (String timeZoneId : ImmutableList.of(UTC_KEY.getId(), jvmZone.getId(), someZone.getId())) {
    Session session = Session.builder(getQueryRunner().getDefaultSession())
        .setTimeZoneKey(TimeZoneKey.getTimeZoneKey(timeZoneId))
        .build();
    testCases.execute(getQueryRunner(), session, mysqlCreateAndInsert("tpch.test_date"));
    testCases.execute(getQueryRunner(), session, prestoCreateAsSelect("test_date"));
  }
}

代码示例来源：origin: prestosql/presto

@Test
public void testDate()
{
  // Note: there is identical test for MySQL
  ZoneId jvmZone = ZoneId.systemDefault();
  checkState(jvmZone.getId().equals("America/Bahia_Banderas"), "This test assumes certain JVM time zone");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInJvmZone = LocalDate.of(1970, 1, 1);
  verify(jvmZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInJvmZone.atStartOfDay()).isEmpty());
  ZoneId someZone = ZoneId.of("Europe/Vilnius");
  LocalDate dateOfLocalTimeChangeForwardAtMidnightInSomeZone = LocalDate.of(1983, 4, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeForwardAtMidnightInSomeZone.atStartOfDay()).isEmpty());
  LocalDate dateOfLocalTimeChangeBackwardAtMidnightInSomeZone = LocalDate.of(1983, 10, 1);
  verify(someZone.getRules().getValidOffsets(dateOfLocalTimeChangeBackwardAtMidnightInSomeZone.atStartOfDay().minusMinutes(1)).size() == 2);
  DataTypeTest testCases = DataTypeTest.create()
      .addRoundTrip(dateDataType(), LocalDate.of(1952, 4, 3)) // before epoch
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 1, 1))
      .addRoundTrip(dateDataType(), LocalDate.of(1970, 2, 3))
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 7, 1)) // summer on northern hemisphere (possible DST)
      .addRoundTrip(dateDataType(), LocalDate.of(2017, 1, 1)) // winter on northern hemisphere (possible DST on southern hemisphere)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInJvmZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeForwardAtMidnightInSomeZone)
      .addRoundTrip(dateDataType(), dateOfLocalTimeChangeBackwardAtMidnightInSomeZone);
  for (String timeZoneId : ImmutableList.of(UTC_KEY.getId(), jvmZone.getId(), someZone.getId())) {
    Session session = Session.builder(getQueryRunner().getDefaultSession())
        .setTimeZoneKey(TimeZoneKey.getTimeZoneKey(timeZoneId))
        .build();
    testCases.execute(getQueryRunner(), session, postgresCreateAndInsert("tpch.test_date"));
    testCases.execute(getQueryRunner(), session, prestoCreateAsSelect("test_date"));
  }
}

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