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>
      implements ObservableList<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 inherited from 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
    --- | --- | ---
    `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.
    `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.
    `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 inherited from 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 inherited from class java.util.AbstractList

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

    - ### Methods inherited from class java.util.AbstractCollection

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

    - ### Methods inherited from class java.lang.Object

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

    - ### Methods inherited from interface java.util.Collection

      `parallelStream, removeIf, stream, toArray`

    - ### Methods inherited from interface java.lang.Iterable

      `forEach`

    - ### Methods inherited from 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 inherited from interface javafx.beans.Observable

      `addListener, removeListener`

    - ### Methods inherited from interface javafx.collections.ObservableList

      `addAll, addListener, filtered, remove, removeAll, removeListener, retainAll, setAll, setAll, sorted, sorted`

- - ### Constructor Detail

    - #### TransformationList

          protected TransformationList​(ObservableList<? extends F> source)

      Creates a new Transformation list wrapped around the source list.
      Parameters:
        `source` - the wrapped list

  - ### Method Detail

    - #### 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)`