net.time4j.range

Class Boundary<T>

java.lang.Object

net.time4j.range.Boundary<T>

Type Parameters:

T - generic temporal type

All Implemented Interfaces:

Serializable

public final class Boundary<T>
extends Object
implements Serializable

Represents an interval boundary, either the lower one or the upper one.

Since:

2.0

Author:

Meno Hochschild

See Also:

Serialized Form

Concurrency:

This class is immutable and can be used by multiple threads in parallel.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
T	getTemporal() Yields the time point of this interval boundary.
int	hashCode()
static <T> Boundary<T>	infiniteFuture() Defines a symbolic open boundary for the infinite future.
static <T> Boundary<T>	infinitePast() Defines a symbolic open boundary for the infinite past.
boolean	isClosed() Determines if this boundary is closed.
boolean	isInfinite() Determines if this boundary is infinite.
boolean	isOpen() Determines if this boundary is open.
static <T> Boundary<T>	ofClosed(T temporal) Defines a finite closed boundary for the specified time point.
static <T> Boundary<T>	ofOpen(T temporal) Defines a finite open boundary for the specified time point.
String	toString() Yields a descriptive string.

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Method Detail

infinitePast

public static <T> Boundary<T> infinitePast()

Defines a symbolic open boundary for the infinite past.

Type Parameters:

T - generic temporal type

Returns:

open boundary in infinite past without defined time

Since:

2.0

infiniteFuture

public static <T> Boundary<T> infiniteFuture()

Defines a symbolic open boundary for the infinite future.

Type Parameters:

T - generic temporal type

Returns:

open boundary in infinite future without defined time

Since:

2.0

ofOpen

public static <T> Boundary<T> ofOpen(T temporal)

Defines a finite open boundary for the specified time point.

Type Parameters:

T - generic temporal type

Parameters:

temporal - time of the boundary

Returns:

finite open boundary

Since:

2.0

See Also:

infinitePast(), infiniteFuture(), isOpen()

ofClosed

public static <T> Boundary<T> ofClosed(T temporal)

Defines a finite closed boundary for the specified time point.

Type Parameters:

T - generic temporal type

Parameters:

temporal - time of the boundary

Returns:

finite closed boundary

Since:

2.0

See Also:

infinitePast(), infiniteFuture(), isClosed()

getTemporal

public T getTemporal()

Yields the time point of this interval boundary.

Returns:

time point or null if infinite

Since:

2.0

See Also:

isInfinite()

isOpen

public boolean isOpen()

Determines if this boundary is open.

If open then the associated time point does not belong to a given interval with this boundary.

Returns:

true if open else false

Since:

2.0

See Also:

ofOpen(T)

isClosed

public boolean isClosed()

Determines if this boundary is closed.

If closed then the associated time point belongs to a given interval with this boundary.

Returns:

true if closed else false

Since:

2.0

See Also:

ofClosed(T)

isInfinite

public boolean isInfinite()

Determines if this boundary is infinite.

If infinite then the associated time point is not defined.

Returns:

true if infinite else false

Since:

2.0

See Also:

getTemporal()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Yields a descriptive string.

Overrides:

toString in class Object

Returns:

String (either "(-∞)", "(+∞)" or "(temporal)" for finite open boundary or "[temporal]" for finite closed boundary)