Package org.eclipse.ui.dialogs

Class 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 Detail

      • SelectionHistory

        public SelectionHistory()
        Creates new instance of SelectionHistory.

    • Method Detail

      • 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