Class SetExpression<E>

java.lang.Object

javafx.beans.binding.SetExpression<E>

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

All Implemented Interfaces:: Iterable<E>, Collection<E>, Set<E>, Observable, ObservableObjectValue<ObservableSet<E>>, ObservableSetValue<E>, ObservableValue<ObservableSet<E>>, ObservableSet<E>

Direct Known Subclasses:: ReadOnlySetProperty, SetBinding

public abstract class SetExpression<E>
extends Object
implements ObservableSetValue<E>

SetExpression is an ObservableSetValue plus additional convenience methods to generate bindings in a fluent style.

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

If the wrapped list of a SetExpression is null, all methods implementing the Set interface will behave as if they were applied to an immutable empty set.

Since:: JavaFX 2.1

Property Summary

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

Constructor Summary

Constructors
Constructor	Description
`SetExpression()`	Creates a default `SetExpression`.

Method Summary

Modifier and Type	Method	Description
`StringBinding`	`asString()`	Creates a `StringBinding` that holds the value of the `SetExpression` turned into a `String`.
`abstract ReadOnlyBooleanProperty`	`emptyProperty()`	A boolean property that is `true`, if the set is empty.
`int`	`getSize()`	The size of the set
`BooleanBinding`	`isEqualTo(ObservableSet<?> other)`	Creates a new `BooleanBinding` that holds `true` if this set is equal to another `ObservableSet`.
`BooleanBinding`	`isNotEqualTo(ObservableSet<?> other)`	Creates a new `BooleanBinding` that holds `true` if this set is not equal to another `ObservableSet`.
`BooleanBinding`	`isNotNull()`	Creates a new `BooleanBinding` that holds `true` if the wrapped set is not `null`.
`BooleanBinding`	`isNull()`	Creates a new `BooleanBinding` that holds `true` if the wrapped set is `null`.
`static <E> SetExpression<E>`	`setExpression(ObservableSetValue<E> value)`	Returns a `SetExpression` that wraps a `ObservableSetValue`.
`abstract ReadOnlyIntegerProperty`	`sizeProperty()`	An integer property that represents the size of the set.

Methods declared in class java.lang.Object

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

addListener, removeListener

Methods declared in interface javafx.beans.value.ObservableObjectValue

get

Methods declared in interface javafx.collections.ObservableSet

addListener, removeListener

Methods declared in interface javafx.beans.value.ObservableValue

addListener, getValue, removeListener

Methods declared in interface java.util.Set

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

Property Details

size

public abstract ReadOnlyIntegerProperty sizeProperty

An integer property that represents the size of the set.

See Also:: getSize()

empty

public abstract ReadOnlyBooleanProperty emptyProperty

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

See Also:: Set.isEmpty()

Constructor Details

SetExpression

public SetExpression()

Creates a default SetExpression.

Method Details

setExpression

public static <E> SetExpression<E> setExpression(ObservableSetValue<E> value)

Returns a SetExpression that wraps a ObservableSetValue. If the ObservableSetValue is already a SetExpression, it will be returned. Otherwise a new SetBinding is created that is bound to the ObservableSetValue.

Type Parameters:: E - the type of the Set elements
Parameters:: value - The source ObservableSetValue
Returns:: A SetExpression that wraps the ObservableSetValue if necessary
Throws:: NullPointerException - if value is null

getSize

public int getSize()

The size of the set

Returns:: the size

sizeProperty

public abstract ReadOnlyIntegerProperty sizeProperty()

An integer property that represents the size of the set.

See Also:: getSize()

emptyProperty

public abstract ReadOnlyBooleanProperty emptyProperty()

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

See Also:: Set.isEmpty()

isEqualTo

public BooleanBinding isEqualTo(ObservableSet<?> other)

Creates a new BooleanBinding that holds true if this set is equal to another ObservableSet.

Parameters:: other - the other ObservableSet
Returns:: the new BooleanBinding
Throws:: NullPointerException - if other is null

isNotEqualTo

public BooleanBinding isNotEqualTo(ObservableSet<?> other)

Creates a new BooleanBinding that holds true if this set is not equal to another ObservableSet.

Parameters:: other - the other ObservableSet
Returns:: the new BooleanBinding
Throws:: NullPointerException - if other is null

isNull

public BooleanBinding isNull()

Creates a new BooleanBinding that holds true if the wrapped set is null.

Returns:: the new BooleanBinding

isNotNull

public BooleanBinding isNotNull()

Creates a new BooleanBinding that holds true if the wrapped set is not null.

Returns:: the new BooleanBinding

asString

public StringBinding asString()

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

Returns:: the new StringBinding

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Documentation extracted from JavaFX API Documentation.
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