Package org.eclipse.gef.common.collections

Class CollectionUtils

java.lang.Object
org.eclipse.gef.common.collections.CollectionUtils
public class CollectionUtils extends Object
The CollectionUtils contains a method to compute the old value of an ObservableList for a given ListChangeListener.Change event. For details, see getPreviousContents(javafx.collections.ListChangeListener.Change).

  • Constructor Details

    • CollectionUtils

      public CollectionUtils()

  • Method Details

    • emptyMultiset

      public static <E> ObservableMultiset<E> emptyMultiset()
      Returns an empty, unmodifiable ObservableMultiset.
      Type Parameters:
      E - The element type of the ObservableMultiset.
      Returns:
      An empty, unmodifiable ObservableMultiset.

    • emptySetMultimap

      public static <K, V> ObservableSetMultimap<K,V> emptySetMultimap()
      Returns an empty, unmodifiable ObservableSetMultimap.
      Type Parameters:
      K - The key type of the ObservableSetMultimap.
      V - The value type of the ObservableSetMultimap.
      Returns:
      An empty, unmodifiable ObservableSetMultimap.

    • getPermutation

      public static <E> int[] getPermutation(javafx.collections.ListChangeListener.Change<? extends E> change)
      Computes the permutation for the given ListChangeListener.Change.
      Type Parameters:
      E - The element type of the ObservableList that was changed.
      Parameters:
      change - The change, for which ListChangeListener.Change.wasPermutated() has to return true.
      Returns:
      An integer array mapping previous indexes to current ones.

    • getPreviousContents

      public static <E> List<E> getPreviousContents(javafx.collections.ListChangeListener.Change<E> change)
      Computes the previous contents of the source ObservableList before the given ListChangeListener.Change was applied.
      Type Parameters:
      E - The element type of the ObservableList.
      Parameters:
      change - The ListChangeListener.Change for which to compute the previous contents.
      Returns:
      A newly created List that resembles the state of the source ObservableList before the change.

    • observableArrayList

      public static <E> javafx.collections.ObservableList<E> observableArrayList()
      Returns a (modifiable) new ObservableList wrapping an ArrayList. Please note that in order to obtain proper change notifications when sorting the returned ObservableList, sort(ObservableList) or sort(ObservableList, Comparator) have to be used instead of FXCollections.sort(ObservableList) and FXCollections.sort(ObservableList, Comparator).
      Type Parameters:
      E - The element type of the ObservableList. The List to wrap.
      Returns:
      An ObservableList wrapping the given List.

    • observableArrayList

      public static <E> javafx.collections.ObservableList<E> observableArrayList(Collection<? extends E> collection)
      Create a new ObservableList that is backed by an ArrayList that contains the contents of the given Collection.
      Type Parameters:
      E - The element type of the ObservableList.
      Parameters:
      collection - The Collection that provides the initial contents of the to be created ObservableList.
      Returns:
      A new ObservableList containing the given contents.

    • observableArrayList

      public static <E> javafx.collections.ObservableList<E> observableArrayList(E... elements)
      Creates a new ObservableList that contains the given elements.
      Type Parameters:
      E - The element type of the ObservableList.
      Parameters:
      elements - The elements that will be added to the returned ObservableList
      Returns:
      a newly created observableArrayList

    • observableHashMultimap

      public static <K, V> ObservableSetMultimap<K,V> observableHashMultimap()
      Returns a (modifiable) new ObservableSetMultimap wrapping a HashMultimap.
      Type Parameters:
      K - The key type of the ObservableSetMultimap.
      V - The value type of the ObservableSetMultimap
      Returns:
      An ObservableSetMultimap wrapping a HashMultimap.

    • observableHashMultiset

      public static <E> ObservableMultiset<E> observableHashMultiset()
      Returns a (modifiable) new ObservableMultiset wrapping a HashMultiset.
      Type Parameters:
      E - The element type of the ObservableList.
      Returns:
      An ObservableMultiset wrapping a HashMultiset.

    • observableList

      public static <E> javafx.collections.ObservableList<E> observableList(List<E> list)
      Returns a (modifiable) new ObservableList wrapping the given List. Please note that in order to obtain proper change notifications when sorting the returned ObservableList, sort(ObservableList) or sort(ObservableList, Comparator) have to be used instead of FXCollections.sort(ObservableList) and FXCollections.sort(ObservableList, Comparator).
      Type Parameters:
      E - The element type of the ObservableList.
      Parameters:
      list - The List to wrap.
      Returns:
      An ObservableList wrapping the given List.

    • observableMultiset

      public static <E> ObservableMultiset<E> observableMultiset(Multiset<E> multiset)
      Returns a (modifiable) new ObservableMultiset wrapping the given List.
      Type Parameters:
      E - The element type of the ObservableList.
      Parameters:
      multiset - The Multiset to wrap.
      Returns:
      An ObservableMultiset wrapping the given List.

    • observableSetMultimap

      public static <K, V> ObservableSetMultimap<K,V> observableSetMultimap(SetMultimap<K,V> setMultimap)
      Returns a (modifiable) new ObservableSetMultimap wrapping the given SetMultimap.
      Type Parameters:
      K - The key type of the ObservableSetMultimap.
      V - The value type of the ObservableSetMultimap
      Parameters:
      setMultimap - The SetMultimap to wrap.
      Returns:
      An ObservableSetMultimap wrapping the given List.

    • sort

      public static <E extends Comparable<? super E>> void sort(javafx.collections.ObservableList<E> observableList)
      Sorts the given ObservableList using the default Comparator .
      Type Parameters:
      E - The value type of the ObservableList.
      Parameters:
      observableList - The ObservableList to sort.

    • sort

      public static <E> void sort(javafx.collections.ObservableList<E> observableList, Comparator<? super E> comparator)
      Sorts the given ObservableList using the given Comparator .
      Type Parameters:
      E - The value type of the ObservableList.
      Parameters:
      observableList - The ObservableList to sort.
      comparator - The Comparator to use.

    • unmodifiableObservableMultiset

      public static <E> ObservableMultiset<E> unmodifiableObservableMultiset(ObservableMultiset<E> multiset)
      Returns an unmodifiable ObservableMultiset wrapping the given ObservableMultiset.
      Type Parameters:
      E - The element type of the ObservableMultiset.
      Parameters:
      multiset - The ObservableMultiset to wrap.
      Returns:
      An unmodifiable wrapper around the given ObservableMultiset.

    • unmodifiableObservableSetMultimap

      public static <K, V> ObservableSetMultimap<K,V> unmodifiableObservableSetMultimap(ObservableSetMultimap<K,V> setMultimap)
      Returns an unmodifiable ObservableSetMultimap wrapping the given ObservableSetMultimap.
      Type Parameters:
      K - The key type of the ObservableSetMultimap.
      V - The value type of the ObservableSetMultimap.
      Parameters:
      setMultimap - The ObservableSetMultimap to wrap.
      Returns:
      An unmodifiable wrapper around the given ObservableSetMultimap.