de.unkrig.commons.util.time
Class TimeInterval

java.lang.Object
  de.unkrig.commons.util.time.TimeInterval

public final class TimeInterval
extends java.lang.Object

A time interval has an optional beginning, an optional duration and an optional ending.

An 'undefined time interval' has neither a beginning, duration nor ending.

A 'defined time interval' has a beginning, a duration and an ending, which are consistent with each other, i.e. beginning + duration = ending.

A 'half-defined' time interval has

• A beginning, but no duration and ending, or
• A duration, but no beginning and ending, or
• An ending, but no beginning and duration

Constructor Summary

TimeInterval()
Constructs an uninitialized TimeInterval.

TimeInterval(TimeInterval other)

Method Summary

PointOfTime	getBeginning() The beginning of this time interval
Duration	getDuration() The duration of this time interval
PointOfTime	getEnding() The ending of this time interval
TimeInterval	setBeginning(PointOfTime beginning) Changes the beginning of this interval.
TimeInterval	setDuration(Duration duration) Changes the duration of this interval.
TimeInterval	setEnding(PointOfTime ending) Changes the ending of this interval.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimeInterval

public TimeInterval(TimeInterval other)

TimeInterval

public TimeInterval()

Constructs an uninitialized TimeInterval.

Method Detail

setBeginning

public TimeInterval setBeginning(@Nullable
                                 PointOfTime beginning)

Changes the beginning of this interval.

Returns:

This object

Throws:

java.lang.IllegalStateException - The beginning is inconsistent with this object's duration and ending, i.e. all three are non-null, and beginning + duration != ending

setDuration

public TimeInterval setDuration(@Nullable
                                Duration duration)

Changes the duration of this interval.

Returns:

This object

Throws:

java.lang.IllegalStateException - The duration is inconsistent with this object's beginning and ending, i.e. all three are non-null, and beginning + duration != ending

setEnding

public TimeInterval setEnding(@Nullable
                              PointOfTime ending)

Changes the ending of this interval.

Returns:

This object

Throws:

java.lang.IllegalStateException - The ending is inconsistent with this object's beginning and duration, i.e. all three are non-null, and beginning + duration != ending

getBeginning

@Nullable
public PointOfTime getBeginning()

The beginning of this time interval

getDuration

@Nullable
public Duration getDuration()

The duration of this time interval

getEnding

@Nullable
public PointOfTime getEnding()

The ending of this time interval