Module javafx.base

Package javafx.beans.property

Class MapPropertyBase<K,V>

java.lang.Object

javafx.beans.binding.MapExpression<K,V>

javafx.beans.property.ReadOnlyMapProperty<K,V>

javafx.beans.property.MapProperty<K,V>

javafx.beans.property.MapPropertyBase<K,V>

Type Parameters:

K - the type of the key elements of the Map

V - the type of the value elements of the Map

All Implemented Interfaces:

Map<K,V>, Observable, Property<ObservableMap<K,V>>, ReadOnlyProperty<ObservableMap<K,V>>, ObservableMapValue<K,V>, ObservableObjectValue<ObservableMap<K,V>>, ObservableValue<ObservableMap<K,V>>, WritableMapValue<K,V>, WritableObjectValue<ObservableMap<K,V>>, WritableValue<ObservableMap<K,V>>, ObservableMap<K,V>

Direct Known Subclasses:

SimpleMapProperty

public abstract class MapPropertyBase<K,V>
extends MapProperty<K,V>

The class MapPropertyBase is the base class for a property wrapping an ObservableMap. 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:

• ObservableMap
• MapProperty

Nested Class Summary

Nested classes/interfaces declared in interface java.util.Map

Map.Entry<K,V>

Property Summary

Properties

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

Constructor Summary

Constructors

Constructor	Description
MapPropertyBase()	The Constructor of MapPropertyBase
MapPropertyBase(ObservableMap<K,V> initialValue)	The constructor of the MapPropertyBase.

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 ObservableMap<K,V>> listener)	Adds a ChangeListener which will be notified whenever the value of the ObservableValue changes.
void	addListener(MapChangeListener<? super K,? super V> listener)	Add a listener to this observable map.
void	bind(ObservableValue<? extends ObservableMap<K,V>> newObservable)	Create a unidirection binding for this Property.
ReadOnlyBooleanProperty	emptyProperty()	A boolean property that is true, if the map is empty.
protected void	fireValueChangedEvent()	Sends notifications to all attached InvalidationListeners, ChangeListeners, and MapChangeListener.
protected void	fireValueChangedEvent(MapChangeListener.Change<? extends K,? extends V> change)	Sends notifications to all attached InvalidationListeners, ChangeListeners, and MapChangeListener.
ObservableMap<K,V>	get()	Returns the current value of this ObservableObjectValue<T>.
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 ObservableMap<K,V>> listener)	Removes the given listener from the list of listeners that are notified whenever the value of the ObservableValue changes.
void	removeListener(MapChangeListener<? super K,? super V> listener)	Tries to removed a listener from this observable map.
void	set(ObservableMap<K,V> newValue)	Set the wrapped value.
ReadOnlyIntegerProperty	sizeProperty()	An integer property that represents the size of the map.
String	toString()	Returns a string representation of this MapPropertyBase object.
void	unbind()	Remove the unidirectional binding for this Property.

Methods declared in class javafx.beans.property.MapProperty

bindBidirectional, setValue, unbindBidirectional

Methods declared in class javafx.beans.property.ReadOnlyMapProperty

bindContent, bindContentBidirectional, equals, hashCode, unbindContent, unbindContentBidirectional

Methods declared in class javafx.beans.binding.MapExpression

asString, clear, containsKey, containsValue, entrySet, get, getSize, getValue, isEmpty, isEqualTo, isNotEqualTo, isNotNull, isNull, keySet, mapExpression, put, putAll, remove, size, valueAt, valueAt, values

Methods declared in class java.lang.Object

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

Methods declared in interface java.util.Map

clear, compute, computeIfAbsent, computeIfPresent, containsKey, containsValue, entrySet, equals, forEach, get, getOrDefault, hashCode, isEmpty, keySet, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, replaceAll, size, values

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 javafx.beans.value.WritableValue

getValue

Property Details

size

public ReadOnlyIntegerProperty sizeProperty

Specified by:

sizeProperty in class MapExpression<K,V>

Returns:

the property

See Also:

• sizeProperty()

empty

public ReadOnlyBooleanProperty emptyProperty

Specified by:

emptyProperty in class MapExpression<K,V>

Returns:

the ReadOnlyBooleanProperty

See Also:

• emptyProperty()

Constructor Details

MapPropertyBase

public MapPropertyBase()

The Constructor of MapPropertyBase

MapPropertyBase

public MapPropertyBase(ObservableMap<K,V> initialValue)

The constructor of the MapPropertyBase.

Parameters:

initialValue - the initial value of the wrapped value

Method Details

sizeProperty

public ReadOnlyIntegerProperty sizeProperty()

Description copied from class: MapExpression

An integer property that represents the size of the map.

Specified by:

sizeProperty in class MapExpression<K,V>

Returns:

the size property

See Also:

• MapExpression.getSize()

emptyProperty

public ReadOnlyBooleanProperty emptyProperty()

Description copied from class: MapExpression

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

Specified by:

emptyProperty in class MapExpression<K,V>

Returns:

the empty property

See Also:

• MapExpression.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 ObservableMap<K,V>> 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 ObservableMap<K,V>> 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.

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:

• ObservableValue.addListener(ChangeListener)

addListener

public void addListener(MapChangeListener<? super K,? super V> listener)

Description copied from interface: ObservableMap

Add a listener to this observable map.

Parameters:

listener - the listener for listening to the list changes

removeListener

public void removeListener(MapChangeListener<? super K,? super V> listener)

Description copied from interface: ObservableMap

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

Parameters:

listener - a listener to remove

fireValueChangedEvent

protected void fireValueChangedEvent()

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

fireValueChangedEvent

protected void fireValueChangedEvent(MapChangeListener.Change<? extends K,? extends V> change)

Sends notifications to all attached InvalidationListeners, ChangeListeners, and MapChangeListener. 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 ObservableMap<K,V> get()

Description copied from interface: ObservableObjectValue

Returns the current value of this ObservableObjectValue<T>.

Returns:

The current value

set

public void set(ObservableMap<K,V> 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 ObservableMap<K,V>> 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 MapPropertyBase object.

Overrides:

toString in class MapProperty<K,V>

Returns:

a string representation of this MapPropertyBase object.