com.dautelle.physics
Class Duration

java.lang.Object
  java.lang.Number
      com.dautelle.math.numbers.RealtimeNumber
          com.dautelle.physics.Quantity
              com.dautelle.physics.Duration

All Implemented Interfaces:

java.lang.Comparable, Operable, Realtime, Representable, java.io.Serializable

public class Duration

extends Quantity

This class represents a period of existence or persistence. The system unit for this quantity is "s" (Système International d'Unités).

Version:

4.1, February 10, 2003

Author:

Jean-Marie Dautelle

See Also:

Serialized Form

Nested Class Summary

Nested classes inherited from class com.dautelle.physics.Quantity

Quantity.Factory, Quantity.Value

Field Summary

static Duration

ZERO Represents a Duration amounting to nothing.

Constructor Summary

protected

Duration() Default constructor (allows for derivation).

Method Summary

java.util.Date	addTo(java.util.Date date) Returns the date after the specified date.
static Duration	between(java.util.Date from, java.util.Date to) Returns the Duration from the ellapsed time between two dates.
static Duration	durationOf(Quantity quantity) Returns the Duration corresponding to the specified quantity.
static void	showAs(Unit unit) Shows Duration instances in the specified unit.
java.util.Date	subtractFrom(java.util.Date date) Returns the date before the specified date.

Methods inherited from class com.dautelle.physics.Quantity

abs, add, appendTo, approxEquals, approxEquals, compareTo, divide, divide, doubleValue, doubleValue, equals, floatValue, floatValue, getAbsoluteError, getMaximum, getMinimum, getOutputUnit, getRelativeError, getSystemUnit, hashCode, intValue, intValue, inverse, isPossiblyZero, longValue, longValue, multiply, multiply, negate, opposite, plus, pow, random, reciprocal, root, subtract, times, toString, toString, toXml, valueOf, valueOf, valueOf, valueOf

Methods inherited from class com.dautelle.math.numbers.RealtimeNumber

clone, export, isLocalObject, isPoolObject, pow, recycle, toHeap

Methods inherited from class java.lang.Number

byteValue, shortValue

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Field Detail

ZERO

public static final Duration ZERO

Represents a Duration amounting to nothing.

Constructor Detail

Duration

protected Duration()

Default constructor (allows for derivation).

Method Detail

durationOf

public static Duration durationOf(Quantity quantity)

Returns the Duration corresponding to the specified quantity.

Parameters:

quantity - a quantity compatible with Duration.

Returns:

the specified quantity or a new Duration instance.

Throws:

ConversionException - if the current model does not allow the specified quantity to be converted to Duration.

showAs

public static void showAs(Unit unit)

Shows Duration instances in the specified unit.

Parameters:

unit - the output unit for Duration instances.

See Also:

Quantity.getOutputUnit()

between

public static Duration between(java.util.Date from,
                               java.util.Date to)

Returns the Duration from the ellapsed time between two dates.

Parameters:

from - the departure date.

to - the arrival date.

Returns:

the ellapsed time between the specified dates.

addTo

public java.util.Date addTo(java.util.Date date)

Returns the date after the specified date. How long after being specified by this Duration.

Parameters:

date - the date of origin.

Returns:

date + this.

subtractFrom

public java.util.Date subtractFrom(java.util.Date date)

Returns the date before the specified date. How long before being specified by this Duration.

Parameters:

date - the date of origin.

Returns:

date - this