Package org.opencastproject.metadata.api.util

Class Interval

java.lang.Object

org.opencastproject.metadata.api.util.Interval

public abstract class Interval
extends Object

An interval in time, possibly unbounded on one end. The interval is described by its bounds which are absolutely placed instants in time with a precision defined by Date.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Interval.Match<A>

Method Summary

Modifier and Type	Method	Description
static Interval	boundedInterval(Date leftBound, Date rightBound)	Constructor function for a bounded interval.
abstract <A> A	fold(Interval.Match<A> visitor)	Safe decomposition.
static Interval	fromValues(Date leftBound, Date rightBound)	Create an interval from two dates.
boolean	isBounded()	Test if both endpoints are not infinite.
abstract boolean	isLeftInfinite()	Test if the right endpoint is infinite.
abstract boolean	isRightInfinite()	Test if the left endpoint is infinite.
static Interval	leftBoundedInterval(Date leftBound)	Constructor function for a left bounded interval, i.e. an interval with an infinite right endpoint.
static Interval	rightBoundedInterval(Date rightBound)	Constructor function for a right bounded interval, i.e. an interval with an infinite left endpoint.

Methods inherited from class java.lang.Object

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

Method Details

boundedInterval

public static Interval boundedInterval(Date leftBound,
 Date rightBound)

Constructor function for a bounded interval.

rightBoundedInterval

public static Interval rightBoundedInterval(Date rightBound)

Constructor function for a right bounded interval, i.e. an interval with an infinite left endpoint.

leftBoundedInterval

public static Interval leftBoundedInterval(Date leftBound)

Constructor function for a left bounded interval, i.e. an interval with an infinite right endpoint.

fromValues

public static Interval fromValues(Date leftBound,
 Date rightBound)

Create an interval from two dates. One of the dates may be null to indicate an infinite endpoint.

Throws:

IllegalArgumentException - if boths bounds are null

isBounded

public boolean isBounded()

Test if both endpoints are not infinite.

isLeftInfinite

public abstract boolean isLeftInfinite()

Test if the right endpoint is infinite.

isRightInfinite

public abstract boolean isRightInfinite()

Test if the left endpoint is infinite.

fold

public abstract <A> A fold(Interval.Match<A> visitor)

Safe decomposition.