Module javafx.base

Package javafx.collections.transformation

Class TransformationList<E,F>

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractList<E>

javafx.collections.ObservableListBase<E>

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

Type Parameters:

E - the type parameter of this list

F - the upper bound of the type of the source list

All Implemented Interfaces:

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

Direct Known Subclasses:

FilteredList, SortedList

public abstract class TransformationList<E,F>
extends ObservableListBase<E>

A base class for all lists that wrap another list in a way that changes (transforms) the wrapped list's elements, order, size, or structure. If the source list is observable, a listener is automatically added to it and the events are delegated to sourceChanged(javafx.collections.ListChangeListener.Change).

Since:

JavaFX 8.0

Field Summary

Fields declared in class java.util.AbstractList

modCount

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	TransformationList(ObservableList<? extends F> source)	Creates a new Transformation list wrapped around the source list.

Method Summary

Modifier and Type	Method	Description
final ObservableList<? extends F>	getSource()	The source list specified in the constructor of this transformation list.
abstract int	getSourceIndex(int index)	Maps the index of this list's element to an index in the direct source list.
final int	getSourceIndexFor(ObservableList<?> list, int index)	Maps the index of this list's element to an index of the provided list.
abstract int	getViewIndex(int index)	Maps the index of the direct source list's element to an index in this list.
final boolean	isInTransformationChain(ObservableList<?> list)	Checks whether the provided list is in the chain under this TransformationList.
protected abstract void	sourceChanged(ListChangeListener.Change<? extends F> c)	Called when a change from the source is triggered.

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, get, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList

Methods declared in class java.util.AbstractCollection

addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, size, 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, clear, contains, containsAll, equals, get, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, replaceAll, retainAll, set, size, sort, spliterator, subList, toArray, toArray

Methods declared in interface javafx.beans.Observable

subscribe

Methods declared in interface javafx.collections.ObservableList

filtered, sorted, sorted

Constructor Details

TransformationList

protected TransformationList(ObservableList<? extends F> source)

Creates a new Transformation list wrapped around the source list.

Parameters:

source - the wrapped list

Method Details

getSource

public final ObservableList<? extends F> getSource()

The source list specified in the constructor of this transformation list.

Returns:

The List that is directly wrapped by this TransformationList

isInTransformationChain

public final boolean isInTransformationChain(ObservableList<?> list)

Checks whether the provided list is in the chain under this TransformationList. This means the list is either the direct source as returned by getSource() or the direct source is a TransformationList, and the list is in it's transformation chain.

Parameters:

list - the list to check

Returns:

true if the list is in the transformation chain as specified above.

sourceChanged

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

Called when a change from the source is triggered.

Parameters:

c - the change

getSourceIndex

public abstract int getSourceIndex(int index)

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

Parameters:

index - the index in this list

Returns:

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

See Also:

• getSource()

getSourceIndexFor

public final int getSourceIndexFor(ObservableList<?> list,
 int index)

Maps the index of this list's element to an index of the provided list. The list must be in the transformation chain.

Parameters:

list - a list from the transformation chain

index - the index of an element in this list

Returns:

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

See Also:

• isInTransformationChain(javafx.collections.ObservableList)

getViewIndex

public abstract int getViewIndex(int index)

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

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

Since:

9

See Also:

• getSource()
• getSourceIndex(int)