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>

- All Implemented Interfaces:
    `Iterable<E>`, `Collection<E>`, `List<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
    --- | --- | ---
    `ObjectProperty<Predicate<? super E>>` | `predicate` | The predicate that will match the elements that will be in this FilteredList.

  - ### Field Summary

    - ### Fields inherited from 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.
    `Predicate<? super E>` | `getPredicate()` | Gets the value of the property predicate.
    `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.
    `ObjectProperty<Predicate<? super E>>` | `predicateProperty()` | The predicate that will match the elements that will be in this FilteredList.
    `void` | `setPredicate​(Predicate<? super E> predicate)` | Sets the value of the property predicate.
    `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 inherited from class javafx.collections.transformation.TransformationList

      `getSource, getSourceIndexFor, isInTransformationChain`

    - ### 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, hashCode, indexOf, iterator, lastIndexOf, listIterator, listIterator, remove, removeRange, set, subList`

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

      `addAll, contains, containsAll, isEmpty, remove, removeAll, retainAll, 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, hashCode, indexOf, isEmpty, iterator, lastIndexOf, listIterator, listIterator, remove, remove, removeAll, replaceAll, retainAll, set, 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`

- - ### Property Detail

    - #### 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)`

  - ### Constructor Detail

    - #### 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 Detail

    - #### 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.
      See Also:
        `getPredicate()`, `setPredicate(Predicate)`

    - #### getPredicate

          public final Predicate<? super E> getPredicate()

      Gets the value of the property predicate.
      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.

    - #### setPredicate

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

      Sets the value of the property predicate.
      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.

    - #### 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
      Throws:
        `IndexOutOfBoundsException`

    - #### 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)`