javafx.collections

Class SetChangeListener.Change<E>

java.lang.Object

javafx.collections.SetChangeListener.Change<E>

Type Parameters:

E - element type

Direct Known Subclasses:

SetAdapterChange, SetExpressionHelper.SimpleChange

Enclosing interface:

SetChangeListener<E>

public abstract static class SetChangeListener.Change<E>
extends Object

An elementary change done to an ObservableSet. Change contains information about an add or remove operation. Note that adding element that is already in the set does not modify the set and hence no change will be generated.

Since:

JavaFX 2.1

Constructor Summary

Constructors

Constructor and Description
Change(ObservableSet<E> set) Constructs a change associated with a set.

Method Summary

Modifier and Type	Method and Description
abstract E	getElementAdded() Get the new element.
abstract E	getElementRemoved() Get the old element.
ObservableSet<E>	getSet() An observable set that is associated with the change.
abstract boolean	wasAdded() If this change is a result of add operation.
abstract boolean	wasRemoved() If this change is a result of removal operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

Change

public Change(ObservableSet<E> set)

Constructs a change associated with a set.

Parameters:

set - the source of the change

Method Detail

getSet

public ObservableSet<E> getSet()

An observable set that is associated with the change.

Returns:

the source set

wasAdded

public abstract boolean wasAdded()

If this change is a result of add operation.

Returns:

true if a new element was added to the set

wasRemoved

public abstract boolean wasRemoved()

If this change is a result of removal operation.

Returns:

true if an old element was removed from the set

getElementAdded

public abstract E getElementAdded()

Get the new element. Return null if this is a removal.

Returns:

the element that was just added

getElementRemoved

public abstract E getElementRemoved()

Get the old element. Return null if this is an addition.

Returns:

the element that was just removed