Class OffsetDateTimeField


public class OffsetDateTimeField extends DecoratedDateTimeField
Generic offset adjusting datetime field.

OffsetDateTimeField is thread-safe and immutable.

Since:
1.0
Author:
Brian S O'Neill
  • Constructor Details

    • OffsetDateTimeField

      public OffsetDateTimeField(DateTimeField field, int offset)
      Constructor.
      Parameters:
      field - the field to wrap, like "year()".
      offset - offset to add to field values
      Throws:
      IllegalArgumentException - if offset is zero
    • OffsetDateTimeField

      public OffsetDateTimeField(DateTimeField field, DateTimeFieldType type, int offset)
      Constructor.
      Parameters:
      field - the field to wrap, like "year()".
      type - the field type this field actually uses
      offset - offset to add to field values
      Throws:
      IllegalArgumentException - if offset is zero
    • OffsetDateTimeField

      public OffsetDateTimeField(DateTimeField field, DateTimeFieldType type, int offset, int minValue, int maxValue)
      Constructor.
      Parameters:
      field - the field to wrap, like "year()".
      type - the field type this field actually uses
      offset - offset to add to field values
      minValue - minimum allowed value
      maxValue - maximum allowed value
      Throws:
      IllegalArgumentException - if offset is zero
  • Method Details

    • get

      public int get(long instant)
      Get the amount of offset units from the specified time instant.
      Overrides:
      get in class DecoratedDateTimeField
      Parameters:
      instant - the time instant in millis to query.
      Returns:
      the amount of units extracted from the input.
    • add

      public long add(long instant, int amount)
      Add the specified amount of offset units to the specified time instant. The amount added may be negative.
      Overrides:
      add in class BaseDateTimeField
      Parameters:
      instant - the time instant in millis to update.
      amount - the amount of units to add (can be negative).
      Returns:
      the updated time instant.
    • add

      public long add(long instant, long amount)
      Add the specified amount of offset units to the specified time instant. The amount added may be negative.
      Overrides:
      add in class BaseDateTimeField
      Parameters:
      instant - the time instant in millis to update.
      amount - the amount of units to add (can be negative).
      Returns:
      the updated time instant.
      See Also:
    • addWrapField

      public long addWrapField(long instant, int amount)
      Add to the offset component of the specified time instant, wrapping around within that component if necessary.
      Overrides:
      addWrapField in class BaseDateTimeField
      Parameters:
      instant - the time instant in millis to update.
      amount - the amount of units to add (can be negative).
      Returns:
      the updated time instant.
    • set

      public long set(long instant, int value)
      Set the specified amount of offset units to the specified time instant.
      Overrides:
      set in class DecoratedDateTimeField
      Parameters:
      instant - the time instant in millis to update.
      value - value of units to set.
      Returns:
      the updated time instant.
      Throws:
      IllegalArgumentException - if value is too large or too small.
    • isLeap

      public boolean isLeap(long instant)
      Description copied from class: BaseDateTimeField
      Returns whether this field is 'leap' for the specified instant.

      For example, a leap year would return true, a non leap year would return false.

      This implementation returns false.

      Overrides:
      isLeap in class BaseDateTimeField
      Parameters:
      instant - the instant to check for leap status
      Returns:
      true if the field is 'leap'
    • getLeapAmount

      public int getLeapAmount(long instant)
      Description copied from class: BaseDateTimeField
      Gets the amount by which this field is 'leap' for the specified instant.

      For example, a leap year would return one, a non leap year would return zero.

      This implementation returns zero.

      Overrides:
      getLeapAmount in class BaseDateTimeField
      Parameters:
      instant - the instant to check for leap status
      Returns:
      the amount, in units of the leap duration field, that the field is leap
    • getLeapDurationField

      public DurationField getLeapDurationField()
      Description copied from class: BaseDateTimeField
      If this field were to leap, then it would be in units described by the returned duration. If this field doesn't ever leap, null is returned.

      This implementation returns null.

      Overrides:
      getLeapDurationField in class BaseDateTimeField
      Returns:
      the leap duration field if field can be leap, null if it can't
    • getMinimumValue

      public int getMinimumValue()
      Get the minimum value for the field.
      Overrides:
      getMinimumValue in class DecoratedDateTimeField
      Returns:
      the minimum value
    • getMaximumValue

      public int getMaximumValue()
      Get the maximum value for the field.
      Overrides:
      getMaximumValue in class DecoratedDateTimeField
      Returns:
      the maximum value
    • roundFloor

      public long roundFloor(long instant)
      Description copied from class: BaseDateTimeField
      Round to the lowest whole unit of this field. After rounding, the value of this field and all fields of a higher magnitude are retained. The fractional millis that cannot be expressed in whole increments of this field are set to minimum.

      For example, a datetime of 2002-11-02T23:34:56.789, rounded to the lowest whole hour is 2002-11-02T23:00:00.000.

      Overrides:
      roundFloor in class DecoratedDateTimeField
      Parameters:
      instant - the milliseconds from 1970-01-01T00:00:00Z to round
      Returns:
      rounded milliseconds
    • roundCeiling

      public long roundCeiling(long instant)
      Description copied from class: BaseDateTimeField
      Round to the highest whole unit of this field. The value of this field and all fields of a higher magnitude may be incremented in order to achieve this result. The fractional millis that cannot be expressed in whole increments of this field are set to minimum.

      For example, a datetime of 2002-11-02T23:34:56.789, rounded to the highest whole hour is 2002-11-03T00:00:00.000.

      The default implementation calls roundFloor, and if the instant is modified as a result, adds one field unit. Subclasses are encouraged to provide a more efficient implementation.

      Overrides:
      roundCeiling in class BaseDateTimeField
      Parameters:
      instant - the milliseconds from 1970-01-01T00:00:00Z to round
      Returns:
      rounded milliseconds
    • roundHalfFloor

      public long roundHalfFloor(long instant)
      Description copied from class: BaseDateTimeField
      Round to the nearest whole unit of this field. If the given millisecond value is closer to the floor or is exactly halfway, this function behaves like roundFloor. If the millisecond value is closer to the ceiling, this function behaves like roundCeiling.
      Overrides:
      roundHalfFloor in class BaseDateTimeField
      Parameters:
      instant - the milliseconds from 1970-01-01T00:00:00Z to round
      Returns:
      rounded milliseconds
    • roundHalfCeiling

      public long roundHalfCeiling(long instant)
      Description copied from class: BaseDateTimeField
      Round to the nearest whole unit of this field. If the given millisecond value is closer to the floor, this function behaves like roundFloor. If the millisecond value is closer to the ceiling or is exactly halfway, this function behaves like roundCeiling.
      Overrides:
      roundHalfCeiling in class BaseDateTimeField
      Parameters:
      instant - the milliseconds from 1970-01-01T00:00:00Z to round
      Returns:
      rounded milliseconds
    • roundHalfEven

      public long roundHalfEven(long instant)
      Description copied from class: BaseDateTimeField
      Round to the nearest whole unit of this field. If the given millisecond value is closer to the floor, this function behaves like roundFloor. If the millisecond value is closer to the ceiling, this function behaves like roundCeiling.

      If the millisecond value is exactly halfway between the floor and ceiling, the ceiling is chosen over the floor only if it makes this field's value even.

      Overrides:
      roundHalfEven in class BaseDateTimeField
      Parameters:
      instant - the milliseconds from 1970-01-01T00:00:00Z to round
      Returns:
      rounded milliseconds
    • remainder

      public long remainder(long instant)
      Description copied from class: BaseDateTimeField
      Returns the fractional duration milliseconds of this field. In other words, calling remainder returns the duration that roundFloor would subtract.

      For example, on a datetime of 2002-11-02T23:34:56.789, the remainder by hour is 34 minutes and 56.789 seconds.

      The default implementation computes instant - roundFloor(instant). Subclasses are encouraged to provide a more efficient implementation.

      Overrides:
      remainder in class BaseDateTimeField
      Parameters:
      instant - the milliseconds from 1970-01-01T00:00:00Z to get the remainder
      Returns:
      remainder duration, in milliseconds
    • getOffset

      public int getOffset()
      Returns the offset added to the field values.
      Returns:
      the offset