Class JavaBeanObjectProperty<T>

java.lang.Object

javafx.beans.binding.ObjectExpression<T>

javafx.beans.property.ReadOnlyObjectProperty<T>

javafx.beans.property.ObjectProperty<T>

javafx.beans.property.adapter.JavaBeanObjectProperty<T>

Type Parameters:: T - type of the wrapped Object

All Implemented Interfaces:: Observable, JavaBeanProperty<T>, ReadOnlyJavaBeanProperty<T>, Property<T>, ReadOnlyProperty<T>, ObservableObjectValue<T>, ObservableValue<T>, WritableObjectValue<T>, WritableValue<T>

public final class JavaBeanObjectProperty<T> extends ObjectProperty<T> implements JavaBeanProperty<T>

A JavaBeanObjectProperty provides an adapter between a regular Java Bean property of type T and a JavaFX ObjectProperty<T>. It cannot be created directly, but a JavaBeanObjectPropertyBuilder has to be used.

As a minimum, the Java Bean class must implement a getter and a setter for the property. The class, as well as the getter and a setter methods, must be declared public. If the getter of an instance of this class is called, the property of the Java Bean is returned. If the setter is called, the value will be passed to the Java Bean property. If the Java Bean property is bound (i.e. it supports PropertyChangeListeners), this JavaBeanObjectProperty will be aware of changes in the Java Bean. Otherwise it can be notified about changes by calling fireValueChangedEvent(). If the Java Bean property is also constrained (i.e. it supports VetoableChangeListeners), this JavaBeanObjectProperty will reject changes, if it is bound to an ObservableValue<Object>.

Deploying an Application as a Module

If the Java Bean class is in a named module, then it must be reflectively accessible to the javafx.base module. A class is reflectively accessible if the module opens the containing package to at least the javafx.base module.

For example, if com.foo.MyBeanClass is in the foo.app module, the module-info.java might look like this:

module foo.app {
    opens com.foo to javafx.base;
}

Alternatively, a class is reflectively accessible if the module exports the containing package unconditionally.

Since:

JavaFX 2.1

See Also:

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 T> listener)`	Adds a `ChangeListener` which will be notified whenever the value of the `ObservableValue` changes.
`void`	`bind(ObservableValue<? extends T> observable)`	Create a unidirection binding for this `Property`.
`void`	`dispose()`	Signals to the JavaFX property that it will not be used anymore and any references can be removed.
`void`	`fireValueChangedEvent()`	This method can be called to notify the adapter of a change of the Java Bean value, if the Java Bean property is not bound (i.e.
`T`	`get()`	Get the wrapped value.
`Object`	`getBean()`	Returns the `Object` that contains this property.
`String`	`getName()`	Returns the name of this property.
`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 T> listener)`	Removes the given listener from the list of listeners that are notified whenever the value of the `ObservableValue` changes.
`void`	`set(T value)`	Set the wrapped value.
`String`	`toString()`	Returns a string representation of this `JavaBeanObjectProperty` object.
`void`	`unbind()`	Remove the unidirectional binding for this `Property`.

Methods declared in class javafx.beans.property.ObjectProperty

bindBidirectional, setValue, unbindBidirectional

Methods declared in class javafx.beans.binding.ObjectExpression

asString, asString, asString, getValue, isEqualTo, isEqualTo, isNotEqualTo, isNotEqualTo, isNotNull, isNull, objectExpression

Methods declared in class java.lang.Object

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

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.Property

bindBidirectional, unbindBidirectional

Methods declared in interface javafx.beans.value.WritableValue

getValue, setValue

Method Details

get

public T get()

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

Specified by:: get in interface ObservableObjectValue<T>
Specified by:: get in interface WritableObjectValue<T>
Returns:: The current value
Throws:: UndeclaredThrowableException - if calling the getter of the Java Bean property throws an IllegalAccessException or an InvocationTargetException.

set

public void set(T value)

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

Specified by:

set in interface WritableObjectValue<T>

Parameters:

value - The new value

Throws:

UndeclaredThrowableException - if calling the getter of the Java Bean property throws an IllegalAccessException or an InvocationTargetException.

See Also:

WritableObjectValue.get()

bind

public void bind(ObservableValue<? extends T> observable)

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.

Specified by:: bind in interface Property<T>
Parameters:: observable - The observable this Property should be bound to.

unbind

public void unbind()

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

Specified by:

unbind in interface Property<T>

See Also:

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

isBound

public boolean isBound()

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

Specified by:

isBound in interface Property<T>

Returns:

true if the Property is bound, false otherwise

See Also:

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

getBean

public Object getBean()

Returns the Object that contains this property. If this property is not contained in an Object, null is returned.

Specified by:: getBean in interface ReadOnlyProperty<T>
Returns:: the containing Object or null

getName

public String getName()

Returns the name of this property. If the property does not have a name, this method returns an empty String.

Specified by:: getName in interface ReadOnlyProperty<T>
Returns:: the name or an empty String

addListener

public void addListener(ChangeListener<? super T> listener)

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.

Specified by:

addListener in interface ObservableValue<T>

Parameters:

listener - The listener to register

See Also:

ObservableValue.removeListener(ChangeListener)

removeListener

public void removeListener(ChangeListener<? super T> listener)

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.

Specified by:

removeListener in interface ObservableValue<T>

Parameters:

listener - The listener to remove

See Also:

ObservableValue.addListener(ChangeListener)

addListener

public void addListener(InvalidationListener listener)

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.

Specified by:

addListener in interface Observable

Parameters:

listener - The listener to register

See Also:

Observable.removeListener(InvalidationListener)

removeListener

public void removeListener(InvalidationListener listener)

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

Specified by:

removeListener in interface Observable

Parameters:

listener - The listener to remove

See Also:

Observable.addListener(InvalidationListener)

fireValueChangedEvent

public void fireValueChangedEvent()

This method can be called to notify the adapter of a change of the Java Bean value, if the Java Bean property is not bound (i.e. it does not support PropertyChangeListeners).

Specified by:: fireValueChangedEvent in interface ReadOnlyJavaBeanProperty<T>

dispose

public void dispose()

Signals to the JavaFX property that it will not be used anymore and any references can be removed. A call of this method usually results in the property stopping to observe the Java Bean property by unregistering its listener(s).

Specified by:: dispose in interface ReadOnlyJavaBeanProperty<T>

toString

public String toString()

Returns a string representation of this JavaBeanObjectProperty object.

Overrides:: toString in class ObjectProperty<T>
Returns:: a string representation of this JavaBeanObjectProperty object.

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Documentation extracted from JavaFX API Documentation.
Licensed under the GNU General Public License, version 2, with the Classpath Exception.
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