javafx.beans.binding

Class ObjectExpression<T>

java.lang.Object

javafx.beans.binding.ObjectExpression<T>

Direct Known Subclasses:

ObjectBinding

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

ObjectExpression is an javafx.beans.value.ObservableObjectValue plus additional convenience methods to generate bindings in a fluent style.

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

Since:

JavaFX 2.0

Constructor Summary

Constructors

Constructor and Description
ObjectExpression()

Method Summary

Modifier and Type	Method and Description
StringBinding	asString() Creates a StringBinding that holds the value of this ObjectExpression turned into a String.
StringBinding	asString(java.util.Locale locale, java.lang.String format) Creates a StringBinding that holds the value of the NumberExpression turned into a String.
StringBinding	asString(java.lang.String format) Creates a StringBinding that holds the value of the ObjectExpression turned into a String.
T	getValue()
BooleanBinding	isEqualTo(<any> other) Creates a new BooleanExpression that holds true if this and another javafx.beans.value.ObservableObjectValue are equal.
BooleanBinding	isNotEqualTo(<any> other) Creates a new BooleanExpression that holds true if this and another javafx.beans.value.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(<any> value) Returns an ObjectExpression that wraps an javafx.beans.value.ObservableObjectValue.

Methods inherited from class java.lang.Object

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

Constructor Detail

ObjectExpression

public ObjectExpression()

Method Detail

getValue

public T getValue()

objectExpression

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

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

Type Parameters:

T - the type of the wrapped Object

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(<any> other)

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

Parameters:

other - the other ObservableObjectValue

Returns:

the new BooleanExpression

Throws:

java.lang.NullPointerException - if other is null

isNotEqualTo

public BooleanBinding isNotEqualTo(<any> other)

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

Parameters:

other - the other ObservableObjectValue

Returns:

the new BooleanExpression

Throws:

java.lang.NullPointerException - if other is null

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

asString

public StringBinding asString()

Creates a StringBinding that holds the value of this ObjectExpression turned into a String. If the value of this ObjectExpression changes, the value of the StringBinding will be updated automatically.

Returns:

the new StringBinding

Since:

JavaFX 8.0

asString

public StringBinding asString(java.lang.String format)

Creates a StringBinding that holds the value of the ObjectExpression turned into a String. If the value of this ObjectExpression changes, the value of the StringBinding will be updated automatically.

The result is formatted according to the formatting String. See java.util.Formatter for formatting rules.

Parameters:

format - the formatting String

Returns:

the new StringBinding

Since:

JavaFX 8.0

asString

public StringBinding asString(java.util.Locale locale,
                              java.lang.String format)

Creates a StringBinding that holds the value of the NumberExpression turned into a String. If the value of this NumberExpression changes, the value of the StringBinding will be updated automatically.

The result is formatted according to the formatting String and the passed in Locale. See java.util.Formatter for formatting rules. See java.util.Locale for details on Locale.

Parameters:

locale - the Locale to be used

format - the formatting String

Returns:

the new StringBinding

Since:

JavaFX 8.0