Package org.h2.util

Class LegacyDateTimeUtils

java.lang.Object
org.h2.util.LegacyDateTimeUtils
public final class LegacyDateTimeUtils extends Object
Date and time utilities for Date, Time, and Timestamp classes.

  • Field Details

    • PROLEPTIC_GREGORIAN_CHANGE

      public static final Date PROLEPTIC_GREGORIAN_CHANGE
      Gregorian change date for a GregorianCalendar that represents a proleptic Gregorian calendar.

    • UTC

      public static final TimeZone UTC
      UTC time zone.

  • Method Details

    • fromDate

      public static ValueDate fromDate(CastDataProvider provider, TimeZone timeZone, Date date)
      Get or create a date value for the given date.
      Parameters:
      provider - the cast information provider
      timeZone - time zone, or null for default
      date - the date
      Returns:
      the value

    • fromTime

      public static ValueTime fromTime(CastDataProvider provider, TimeZone timeZone, Time time)
      Get or create a time value for the given time.
      Parameters:
      provider - the cast information provider
      timeZone - time zone, or null for default
      time - the time
      Returns:
      the value

    • fromTimestamp

      public static ValueTimestamp fromTimestamp(CastDataProvider provider, TimeZone timeZone, Timestamp timestamp)
      Get or create a timestamp value for the given timestamp.
      Parameters:
      provider - the cast information provider
      timeZone - time zone, or null for default
      timestamp - the timestamp
      Returns:
      the value

    • fromTimestamp

      public static ValueTimestamp fromTimestamp(CastDataProvider provider, long ms, int nanos)
      Get or create a timestamp value for the given date/time in millis.
      Parameters:
      provider - the cast information provider
      ms - the milliseconds
      nanos - the nanoseconds
      Returns:
      the value

    • dateValueFromLocalMillis

      public static long dateValueFromLocalMillis(long ms)
      Convert a local datetime in millis to an encoded date.
      Parameters:
      ms - the milliseconds
      Returns:
      the date value

    • nanosFromLocalMillis

      public static long nanosFromLocalMillis(long ms)
      Convert a time in milliseconds in local time to the nanoseconds since midnight.
      Parameters:
      ms - the milliseconds
      Returns:
      the nanoseconds

    • toDate

      public static Date toDate(CastDataProvider provider, TimeZone timeZone, Value value)
      Get the date value converted to the specified time zone.
      Parameters:
      provider - the cast information provider
      timeZone - the target time zone
      value - the value to convert
      Returns:
      the date

    • toTime

      public static Time toTime(CastDataProvider provider, TimeZone timeZone, Value value)
      Get the time value converted to the specified time zone.
      Parameters:
      provider - the cast information provider
      timeZone - the target time zone
      value - the value to convert
      Returns:
      the time

    • toTimestamp

      public static Timestamp toTimestamp(CastDataProvider provider, TimeZone timeZone, Value value)
      Get the timestamp value converted to the specified time zone.
      Parameters:
      provider - the cast information provider
      timeZone - the target time zone
      value - the value to convert
      Returns:
      the timestamp

    • getMillis

      public static long getMillis(CastDataProvider provider, TimeZone tz, long dateValue, long timeNanos)
      Calculate the milliseconds since 1970-01-01 (UTC) for the given date and time (in the specified timezone).
      Parameters:
      provider - the cast information provider
      tz - the timezone of the parameters, or null for the default timezone
      dateValue - date value
      timeNanos - nanoseconds since midnight
      Returns:
      the number of milliseconds (UTC)

    • getTimeZoneOffsetMillis

      public static int getTimeZoneOffsetMillis(CastDataProvider provider, long ms)
      Returns local time zone offset for a specified timestamp.
      Parameters:
      provider - the cast information provider
      ms - milliseconds since Epoch in UTC
      Returns:
      local time zone offset

    • legacyObjectToValue

      public static Value legacyObjectToValue(CastDataProvider session, Object x)
      Convert a legacy Java object to a value.
      Parameters:
      session - the session
      x - the value
      Returns:
      the value, or null if not supported

    • valueToLegacyType

      public static <T> T valueToLegacyType(Class<T> type, Value value, CastDataProvider provider)
      Converts the specified value to an object of the specified legacy type.
      Type Parameters:
      T - the type
      Parameters:
      type - the class
      value - the value
      provider - the cast information provider
      Returns:
      an instance of the specified class, or null if not supported

    • legacyClassToType

      public static TypeInfo legacyClassToType(Class<?> clazz)
      Get the type information for the given legacy Java class.
      Parameters:
      clazz - the Java class
      Returns:
      the value type, or null if not supported