Package org.eclipse.ui.dialogs
Class FilteredItemsSelectionDialog.SelectionHistory
- java.lang.Object
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- org.eclipse.ui.dialogs.FilteredItemsSelectionDialog.SelectionHistory
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- 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 toaccessed(Object)
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Constructor Summary
Constructors Constructor Description SelectionHistory()
Creates new instance ofSelectionHistory
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description void
accessed(Object object)
Adds object to history.boolean
contains(Object object)
Returnstrue
if history contains object.Object[]
getHistoryItems()
Gets array of history items.boolean
isEmpty()
Returnstrue
if history is empty.void
load(IMemento memento)
Load history elements from memento.boolean
remove(Object element)
Remove element from history.protected abstract Object
restoreItemFromMemento(IMemento memento)
Creates an object using given memento.void
save(IMemento memento)
Save history elements to memento.protected abstract void
storeItemToMemento(Object item, IMemento memento)
Store object inIMemento
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Method Detail
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accessed
public void accessed(Object object)
Adds object to history.- Parameters:
object
- the item to be added to the history
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contains
public boolean contains(Object object)
Returnstrue
if history contains object.- Parameters:
object
- the item for which check will be executed- Returns:
true
if history contains objectfalse
in other way
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isEmpty
public boolean isEmpty()
Returnstrue
if history is empty.- Returns:
true
if history is empty
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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
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load
public void load(IMemento memento)
Load history elements from memento.- Parameters:
memento
- memento from which the history will be retrieved
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save
public void save(IMemento memento)
Save history elements to memento.- Parameters:
memento
- memento to which the history will be added
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getHistoryItems
public Object[] getHistoryItems()
Gets array of history items.- Returns:
- array of history elements
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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
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