Module javafx.base

Package javafx.collections.transformation

Class FilteredList<E>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList<E>

javafx.collections.ObservableListBase<E>

javafx.collections.transformation.TransformationList<E,E>

javafx.collections.transformation.FilteredList<E>

Type Parameters:

E - the list element type

All Implemented Interfaces:

Iterable<E>, Collection<E>, List<E>, SequencedCollection<E>, Observable, ObservableList<E>

public final class FilteredList<E>
extends TransformationList<E,E>

Wraps an ObservableList and filters its content using the provided Predicate. All changes in the ObservableList are propagated immediately to the FilteredList.

Since:

JavaFX 8.0

See Also:

• TransformationList

Property Summary

Properties

Type	Property	Description
final ObjectProperty<Predicate<? super E>>	predicate	The predicate that will match the elements that will be in this FilteredList.

Field Summary

Fields declared in class java.util.AbstractList

modCount

Constructor Summary

Constructors

Constructor	Description
FilteredList(ObservableList<E> source)	Constructs a new FilteredList wrapper around the source list.
FilteredList(ObservableList<E> source, Predicate<? super E> predicate)	Constructs a new FilteredList wrapper around the source list.

Method Summary

Modifier and Type	Method	Description
E	get(int index)	Returns the element at the specified position in this list.
final Predicate<? super E>	getPredicate()	Gets the value of the predicate property.
int	getSourceIndex(int index)	Maps the index of this list's element to an index in the direct source list.
int	getViewIndex(int index)	Maps the index of the direct source list's element to an index in this list.
final ObjectProperty<Predicate<? super E>>	predicateProperty()	The predicate that will match the elements that will be in this FilteredList.
final void	setPredicate(Predicate<? super E> predicate)	Sets the value of the predicate property.
int	size()	Returns the number of elements in this list.
protected void	sourceChanged(ListChangeListener.Change<? extends E> c)	Called when a change from the source is triggered.

Methods declared in class javafx.collections.transformation.TransformationList

getSource, getSourceIndexFor, isInTransformationChain

Methods declared in class javafx.collections.ObservableListBase

addAll, addListener, addListener, beginChange, endChange, fireChange, hasListeners, nextAdd, nextPermutation, nextRemove, nextRemove, nextReplace, nextSet, nextUpdate, remove, removeAll, removeListener, removeListener, retainAll, setAll, setAll

Methods declared in class java.util.AbstractList

add, add, addAll, clear, equals, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList

Methods declared in class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, toArray, toArray, toString

Methods declared in class java.lang.Object

clone, finalize, getClass, notify, notifyAll, 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 java.util.List

add, add, addAll, addAll, addFirst, addLast, clear, contains, containsAll, equals, getFirst, getLast, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, removeFirst, removeLast, replaceAll, retainAll, reversed, set, sort, spliterator, subList, toArray, toArray

Methods declared in interface javafx.beans.Observable

subscribe

Methods declared in interface javafx.collections.ObservableList

filtered, sorted, sorted

Property Details

predicate

public final ObjectProperty<Predicate<? super E>> predicateProperty

The predicate that will match the elements that will be in this FilteredList. Elements not matching the predicate will be filtered-out. Null predicate means "always true" predicate, all elements will be matched.

See Also:

• getPredicate()
• setPredicate(Predicate)
• predicateProperty()

Constructor Details

FilteredList

public FilteredList(ObservableList<E> source,
 Predicate<? super E> predicate)

Constructs a new FilteredList wrapper around the source list. The provided predicate will match the elements in the source list that will be visible. If the predicate is null, all elements will be matched and the list is equal to the source list.

Parameters:

source - the source list

predicate - the predicate to match the elements or null to match all elements.

FilteredList

public FilteredList(ObservableList<E> source)

Constructs a new FilteredList wrapper around the source list. This list has an "always true" predicate, containing all the elements of the source list.

This constructor might be useful if you want to bind predicateProperty() of this list.

Parameters:

source - the source list

Method Details

predicateProperty

public final ObjectProperty<Predicate<? super E>> predicateProperty()

The predicate that will match the elements that will be in this FilteredList. Elements not matching the predicate will be filtered-out. Null predicate means "always true" predicate, all elements will be matched.

Returns:

the predicate property

See Also:

• getPredicate()
• setPredicate(Predicate)

getPredicate

public final Predicate<? super E> getPredicate()

Gets the value of the predicate property.

Property description:

The predicate that will match the elements that will be in this FilteredList. Elements not matching the predicate will be filtered-out. Null predicate means "always true" predicate, all elements will be matched.

Returns:

the value of the predicate property

See Also:

• setPredicate(Predicate)
• predicateProperty()

setPredicate

public final void setPredicate(Predicate<? super E> predicate)

Sets the value of the predicate property.

Property description:

The predicate that will match the elements that will be in this FilteredList. Elements not matching the predicate will be filtered-out. Null predicate means "always true" predicate, all elements will be matched.

Parameters:

predicate - the value for the predicate property

See Also:

• getPredicate()
• predicateProperty()

sourceChanged

protected void sourceChanged(ListChangeListener.Change<? extends E> c)

Description copied from class: TransformationList

Called when a change from the source is triggered.

Specified by:

sourceChanged in class TransformationList<E,E>

Parameters:

c - the change

size

public int size()

Returns the number of elements in this list.

Specified by:

size in interface Collection<E>

Specified by:

size in interface List<E>

Specified by:

size in class AbstractCollection<E>

Returns:

the number of elements in this list

get

public E get(int index)

Returns the element at the specified position in this list.

Specified by:

get in interface List<E>

Specified by:

get in class AbstractList<E>

Parameters:

index - index of the element to return

Returns:

the element at the specified position in this list

getSourceIndex

public int getSourceIndex(int index)

Description copied from class: TransformationList

Maps the index of this list's element to an index in the direct source list.

Specified by:

getSourceIndex in class TransformationList<E,E>

Parameters:

index - the index in this list

Returns:

the index of the element's origin in the source list

See Also:

• TransformationList.getSource()

getViewIndex

public int getViewIndex(int index)

Description copied from class: TransformationList

Maps the index of the direct source list's element to an index in this list.

Specified by:

getViewIndex in class TransformationList<E,E>

Parameters:

index - the index in the source list

Returns:

the index of the element in this list if it is contained in this list or negative value otherwise

See Also:

• TransformationList.getSource()
• TransformationList.getSourceIndex(int)