javafx.beans.binding

Class ObjectExpression<T>

java.lang.Object

javafx.beans.binding.ObjectExpression<T>

All Implemented Interfaces:

Observable, ObservableObjectValue<T>, ObservableValue<T>

Direct Known Subclasses:

ObjectBinding, ReadOnlyObjectProperty

public abstract class ObjectExpression<T>
extends java.lang.Object
implements ObservableObjectValue<T>

A ObjectExpression is a ObservableObjectValue plus additional convenience methods to generate bindings in a fluent style.

A concrete sub-class of ObjectExpression has to implement the method ObservableObjectValue.get(), which provides the actual value of this expression.

Constructor Summary

Constructors

Constructor and Description
ObjectExpression()

Method Summary

Methods

Modifier and Type	Method and Description
T	getValue() Returns the current value of this ObservableValue
BooleanBinding	isEqualTo(java.lang.Object other) Creates a new BooleanExpression that holds true if this ObjectExpression is equal to a constant value.
BooleanBinding	isEqualTo(ObservableObjectValue<?> other) Creates a new BooleanExpression that holds true if this and another ObservableObjectValue are equal.
BooleanBinding	isNotEqualTo(java.lang.Object other) Creates a new BooleanExpression that holds true if this ObjectExpression is not equal to a constant value.
BooleanBinding	isNotEqualTo(ObservableObjectValue<?> other) Creates a new BooleanExpression that holds true if this and another ObservableObjectValue are not equal.
BooleanBinding	isNotNull() Creates a new BooleanBinding that holds true if this ObjectExpression is not null.
BooleanBinding	isNull() Creates a new BooleanBinding that holds true if this ObjectExpression is null.
static <T> ObjectExpression<T>	objectExpression(ObservableObjectValue<T> value) Returns an ObjectExpression that wraps an ObservableObjectValue.

Methods inherited from class java.lang.Object

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

Methods inherited from interface javafx.beans.value.ObservableObjectValue

get

Methods inherited from interface javafx.beans.value.ObservableValue

addListener, removeListener

Methods inherited from interface javafx.beans.Observable

addListener, removeListener

Constructor Detail

ObjectExpression

public ObjectExpression()

Method Detail

getValue

public T getValue()

Description copied from interface: ObservableValue

Returns the current value of this ObservableValue

Specified by:

getValue in interface ObservableValue<T>

Returns:

The current value

objectExpression

public static <T> ObjectExpression<T> objectExpression(ObservableObjectValue<T> value)

Returns an ObjectExpression that wraps an ObservableObjectValue. If the ObservableObjectValue is already an ObjectExpression, it will be returned. Otherwise a new ObjectBinding is created that is bound to the ObservableObjectValue.

Parameters:

value - The source ObservableObjectValue

Returns:

A ObjectExpression that wraps the ObservableObjectValue if necessary

Throws:

java.lang.NullPointerException - if value is null

isEqualTo

public BooleanBinding isEqualTo(ObservableObjectValue<?> other)

Creates a new BooleanExpression that holds true if this and another ObservableObjectValue are equal.

Parameters:

other - the other ObservableObjectValue

Returns:

the new BooleanExpression

Throws:

java.lang.NullPointerException - if other is null

isEqualTo

public BooleanBinding isEqualTo(java.lang.Object other)

Creates a new BooleanExpression that holds true if this ObjectExpression is equal to a constant value.

Parameters:

other - the constant value

Returns:

the new BooleanExpression

isNotEqualTo

public BooleanBinding isNotEqualTo(ObservableObjectValue<?> other)

Creates a new BooleanExpression that holds true if this and another ObservableObjectValue are not equal.

Parameters:

other - the other ObservableObjectValue

Returns:

the new BooleanExpression

Throws:

java.lang.NullPointerException - if other is null

isNotEqualTo

public BooleanBinding isNotEqualTo(java.lang.Object other)

Creates a new BooleanExpression that holds true if this ObjectExpression is not equal to a constant value.

Parameters:

other - the constant value

Returns:

the new BooleanExpression

isNull

public BooleanBinding isNull()

Creates a new BooleanBinding that holds true if this ObjectExpression is null.

Returns:

the new BooleanBinding

isNotNull

public BooleanBinding isNotNull()

Creates a new BooleanBinding that holds true if this ObjectExpression is not null.

Returns:

the new BooleanBinding