Package org.eclipse.ui.dialogs

Class FilteredItemsSelectionDialog.SelectionHistory

java.lang.Object
org.eclipse.ui.dialogs.FilteredItemsSelectionDialog.SelectionHistory
Enclosing class:
FilteredItemsSelectionDialog
protected abstract static class FilteredItemsSelectionDialog.SelectionHistory extends Object
History stores a list of key, object pairs. The list is bounded at a certain size. If the list exceeds this size the oldest element is removed from the list. An element can be added/renewed with a call to accessed(Object).

The history can be stored to/loaded from an XML file.

  • Constructor Details

    • SelectionHistory

      public SelectionHistory()
      Creates new instance of SelectionHistory.

  • Method Details

    • accessed

      public void accessed(Object object)
      Adds object to history.
      Parameters:
      object - the item to be added to the history

    • contains

      public boolean contains(Object object)
      Returns true if history contains object.
      Parameters:
      object - the item for which check will be executed
      Returns:
      true if history contains object false in other way

    • isEmpty

      public boolean isEmpty()
      Returns true if history is empty.
      Returns:
      true if history is empty

    • remove

      public boolean remove(Object element)
      Remove element from history.
      Parameters:
      element - to remove form the history
      Returns:
      true if this list contained the specified element

    • load

      public void load(IMemento memento)
      Load history elements from memento.
      Parameters:
      memento - memento from which the history will be retrieved

    • save

      public void save(IMemento memento)
      Save history elements to memento.
      Parameters:
      memento - memento to which the history will be added

    • getHistoryItems

      public Object[] getHistoryItems()
      Gets array of history items.
      Returns:
      array of history elements

    • restoreItemFromMemento

      protected abstract Object restoreItemFromMemento(IMemento memento)
      Creates an object using given memento.
      Parameters:
      memento - memento used for creating new object
      Returns:
      the restored object

    • storeItemToMemento

      protected abstract void storeItemToMemento(Object item, IMemento memento)
      Store object in IMemento.
      Parameters:
      item - the item to store
      memento - the memento to store to