Class SetPropertyBase<E>

java.lang.Object

javafx.beans.binding.SetExpression<E>

javafx.beans.property.ReadOnlySetProperty<E>

javafx.beans.property.SetProperty<E>

javafx.beans.property.SetPropertyBase<E>

Type Parameters:: E - the type of the Set elements

All Implemented Interfaces:: Iterable<E>, Collection<E>, Set<E>, Observable, Property<ObservableSet<E>>, ReadOnlyProperty<ObservableSet<E>>, ObservableObjectValue<ObservableSet<E>>, ObservableSetValue<E>, ObservableValue<ObservableSet<E>>, WritableObjectValue<ObservableSet<E>>, WritableSetValue<E>, WritableValue<ObservableSet<E>>, ObservableSet<E>

Direct Known Subclasses:: SimpleSetProperty

public abstract class SetPropertyBase<E> extends SetProperty<E>

The class SetPropertyBase is the base class for a property wrapping an ObservableSet. It provides all the functionality required for a property except for the ReadOnlyProperty.getBean() and ReadOnlyProperty.getName() methods, which must be implemented by extending classes.

Since:

JavaFX 2.1

See Also:

Property Summary

Type	Property	Description
`ReadOnlyBooleanProperty`	`empty`	A boolean property that is `true`, if the set is empty.
`ReadOnlyIntegerProperty`	`size`	An integer property that represents the size of the set.

Constructor Summary

Constructor	Description
`SetPropertyBase()`	The Constructor of `SetPropertyBase`
`SetPropertyBase(ObservableSet<E> initialValue)`	The constructor of the `SetPropertyBase`.

Method Summary

Modifier and Type	Method	Description
`void`	`addListener(InvalidationListener listener)`	Adds an `InvalidationListener` which will be notified whenever the `Observable` becomes invalid.
`void`	`addListener(ChangeListener<? super ObservableSet<E>> listener)`	Adds a `ChangeListener` which will be notified whenever the value of the `ObservableValue` changes.
`void`	`addListener(SetChangeListener<? super E> listener)`	Add a listener to this observable set.
`void`	`bind(ObservableValue<? extends ObservableSet<E>> newObservable)`	Create a unidirection binding for this `Property`.
`ReadOnlyBooleanProperty`	`emptyProperty()`	A boolean property that is `true`, if the set is empty.
`protected void`	`fireValueChangedEvent()`	Sends notifications to all attached `InvalidationListeners`, `ChangeListeners`, and `SetChangeListener`.
`protected void`	`fireValueChangedEvent(SetChangeListener.Change<? extends E> change)`	Sends notifications to all attached `InvalidationListeners`, `ChangeListeners`, and `SetChangeListener`.
`ObservableSet<E>`	`get()`	Get the wrapped value.
`protected void`	`invalidated()`	The method `invalidated()` can be overridden to receive invalidation notifications.
`boolean`	`isBound()`	Can be used to check, if a `Property` is bound.
`void`	`removeListener(InvalidationListener listener)`	Removes the given listener from the list of listeners, that are notified whenever the value of the `Observable` becomes invalid.
`void`	`removeListener(ChangeListener<? super ObservableSet<E>> listener)`	Removes the given listener from the list of listeners that are notified whenever the value of the `ObservableValue` changes.
`void`	`removeListener(SetChangeListener<? super E> listener)`	Tries to removed a listener from this observable set.
`void`	`set(ObservableSet<E> newValue)`	Set the wrapped value.
`ReadOnlyIntegerProperty`	`sizeProperty()`	An integer property that represents the size of the set.
`String`	`toString()`	Returns a string representation of this `SetPropertyBase` object.
`void`	`unbind()`	Remove the unidirectional binding for this `Property`.

Methods declared in class javafx.beans.property.SetProperty

bindBidirectional, setValue, unbindBidirectional

Methods declared in class javafx.beans.property.ReadOnlySetProperty

bindContent, bindContentBidirectional, equals, hashCode, unbindContent, unbindContentBidirectional

Methods declared in class javafx.beans.binding.SetExpression

add, addAll, asString, clear, contains, containsAll, getSize, getValue, isEmpty, isEqualTo, isNotEqualTo, isNotNull, isNull, iterator, remove, removeAll, retainAll, setExpression, size, toArray, toArray

Methods declared in class java.lang.Object

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

Methods declared in interface java.util.Collection

parallelStream, removeIf, stream, toArray

Methods declared in interface java.lang.Iterable

forEach

Methods declared in interface javafx.beans.Observable

subscribe

Methods declared in interface javafx.beans.value.ObservableValue

flatMap, getValue, map, orElse, subscribe, subscribe, when

Methods declared in interface javafx.beans.property.ReadOnlyProperty

getBean, getName

Methods declared in interface java.util.Set

add, addAll, clear, contains, containsAll, equals, hashCode, isEmpty, iterator, remove, removeAll, retainAll, size, spliterator, toArray, toArray

Methods declared in interface javafx.beans.value.WritableValue

getValue

Property Details

size

public ReadOnlyIntegerProperty sizeProperty

Specified by:

sizeProperty in class SetExpression<E>

Returns:

the property

See Also:

sizeProperty()

empty

public ReadOnlyBooleanProperty emptyProperty

Specified by:

emptyProperty in class SetExpression<E>

Returns:

the ReadOnlyBooleanProperty

See Also:

emptyProperty()

Constructor Details

SetPropertyBase

public SetPropertyBase()

The Constructor of SetPropertyBase

SetPropertyBase

public SetPropertyBase(ObservableSet<E> initialValue)

The constructor of the SetPropertyBase.

Parameters:: initialValue - the initial value of the wrapped value

Method Details

sizeProperty

public ReadOnlyIntegerProperty sizeProperty()

Description copied from class: SetExpression

An integer property that represents the size of the set.

Specified by:

sizeProperty in class SetExpression<E>

Returns:

the size property

See Also:

SetExpression.getSize()

emptyProperty

public ReadOnlyBooleanProperty emptyProperty()

Description copied from class: SetExpression

A boolean property that is true, if the set is empty.

Specified by:

emptyProperty in class SetExpression<E>

Returns:

the empty property

See Also:

SetExpression.isEmpty()

addListener

public void addListener(InvalidationListener listener)

Description copied from interface: Observable

Adds an InvalidationListener which will be notified whenever the Observable becomes invalid. If the same listener is added more than once, then it will be notified more than once. That is, no check is made to ensure uniqueness.

Note that the same actual InvalidationListener instance may be safely registered for different Observables.

The Observable stores a strong reference to the listener which will prevent the listener from being garbage collected and may result in a memory leak. It is recommended to either unregister a listener by calling removeListener after use or to use an instance of WeakInvalidationListener avoid this situation.

Parameters:

listener - The listener to register

See Also:

Observable.removeListener(InvalidationListener)

removeListener

public void removeListener(InvalidationListener listener)

Description copied from interface: Observable

Removes the given listener from the list of listeners, that are notified whenever the value of the Observable becomes invalid.

If the given listener has not been previously registered (i.e. it was never added) then this method call is a no-op. If it had been previously added then it will be removed. If it had been added more than once, then only the first occurrence will be removed.

Parameters:

listener - The listener to remove

See Also:

Observable.addListener(InvalidationListener)

addListener

public void addListener(ChangeListener<? super ObservableSet<E>> listener)

Description copied from interface: ObservableValue

Adds a ChangeListener which will be notified whenever the value of the ObservableValue changes. If the same listener is added more than once, then it will be notified more than once. That is, no check is made to ensure uniqueness.

Note that the same actual ChangeListener instance may be safely registered for different ObservableValues.

The ObservableValue stores a strong reference to the listener which will prevent the listener from being garbage collected and may result in a memory leak. It is recommended to either unregister a listener by calling removeListener after use or to use an instance of WeakChangeListener avoid this situation.

Parameters:

listener - The listener to register

See Also:

ObservableValue.removeListener(ChangeListener)

removeListener

public void removeListener(ChangeListener<? super ObservableSet<E>> listener)

Description copied from interface: ObservableValue

Removes the given listener from the list of listeners that are notified whenever the value of the ObservableValue changes.

Parameters:

listener - The listener to remove

See Also:

ObservableValue.addListener(ChangeListener)

addListener

public void addListener(SetChangeListener<? super E> listener)

Description copied from interface: ObservableSet

Add a listener to this observable set.

Parameters:: listener - the listener for listening to the set changes

removeListener

public void removeListener(SetChangeListener<? super E> listener)

Description copied from interface: ObservableSet

Tries to removed a listener from this observable set. If the listener is not attached to this list, nothing happens.

Parameters:: listener - a listener to remove

fireValueChangedEvent

protected void fireValueChangedEvent()

Sends notifications to all attached InvalidationListeners, ChangeListeners, and SetChangeListener. This method is called when the value is changed, either manually by calling set(javafx.collections.ObservableSet) or in case of a bound property, if the binding becomes invalid.

fireValueChangedEvent

protected void fireValueChangedEvent(SetChangeListener.Change<? extends E> change)

Sends notifications to all attached InvalidationListeners, ChangeListeners, and SetChangeListener. This method is called when the content of the list changes.

Parameters:: change - the change that needs to be propagated

invalidated

protected void invalidated()

The method invalidated() can be overridden to receive invalidation notifications. This is the preferred option in Objects defining the property, because it requires less memory. The default implementation is empty.

get

public ObservableSet<E> get()

Description copied from interface: WritableObjectValue

Get the wrapped value. This must be identical to the value returned from WritableValue.getValue().

This method exists only to align WritableObjectValue API with WritableBooleanValue and subclasses of WritableNumberValue

Returns:: The current value

set

public void set(ObservableSet<E> newValue)

Description copied from interface: WritableObjectValue

Set the wrapped value. Should be equivalent to WritableValue.setValue(java.lang.Object)

Parameters:

newValue - The new value

See Also:

WritableObjectValue.get()

isBound

public boolean isBound()

Description copied from interface: Property

Can be used to check, if a Property is bound.

Returns:

true if the Property is bound, false otherwise

See Also:

Property.bind(javafx.beans.value.ObservableValue)

bind

public void bind(ObservableValue<? extends ObservableSet<E>> newObservable)

Description copied from interface: Property

Create a unidirection binding for this Property.

Note that JavaFX has all the bind calls implemented through weak listeners. This means the bound property can be garbage collected and stopped from being updated.

Parameters:: newObservable - The observable this Property should be bound to.

unbind

public void unbind()

Description copied from interface: Property

Remove the unidirectional binding for this Property. If the Property is not bound, calling this method has no effect.

See Also:

Property.bind(javafx.beans.value.ObservableValue)

toString

public String toString()

Returns a string representation of this SetPropertyBase object.

Overrides:: toString in class SetProperty<E>
Returns:: a string representation of this SetPropertyBase object.

© 2008, 2025, Oracle and/or its affiliates. All rights reserved.
Documentation extracted from JavaFX API Documentation.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
Java, JavaFX and OpenJDK are trademarks or registered trademarks of Oracle and/or its affiliates.