Package org.apache.commons.collections.bidimap
This package contains implementations of the
BidiMap,
OrderedBidiMap and
SortedBidiMap interfaces.
A BidiMap is an extension to Map that allows keys and values to be looked up with equal ease.
One example usage is a system communicating to a legacy datasource that must convert codes
from the new format to the old format and vice versa.
The following implementations are provided in the package:
- DualHashBidiMap - uses two HashMaps to implement BidiMap
- DualTreeBidiMap - uses two TreeMaps to implement SortedBidiMap
- TreeBidiMap - red-black tree implementation of OrderedBidiMap
The following decorators are provided in the package:
- Unmodifiable - ensures the map cannot be altered
-
Class Summary Class Description AbstractBidiMapDecorator Provides a base decorator that enables additional functionality to be added to a BidiMap via decoration.AbstractDualBidiMap AbstractBidiMapimplemented using two maps.AbstractDualBidiMap.BidiMapIterator Inner class MapIterator.AbstractDualBidiMap.EntrySet Inner class EntrySet.AbstractDualBidiMap.EntrySetIterator Inner class EntrySetIterator.AbstractDualBidiMap.KeySet Inner class KeySet.AbstractDualBidiMap.KeySetIterator Inner class KeySetIterator.AbstractDualBidiMap.MapEntry Inner class MapEntry.AbstractDualBidiMap.Values Inner class Values.AbstractDualBidiMap.ValuesIterator Inner class ValuesIterator.AbstractDualBidiMap.View Inner class View.AbstractOrderedBidiMapDecorator Provides a base decorator that enables additional functionality to be added to an OrderedBidiMap via decoration.AbstractSortedBidiMapDecorator Provides a base decorator that enables additional functionality to be added to a SortedBidiMap via decoration.DualHashBidiMap Implementation ofBidiMapthat uses twoHashMapinstances.DualTreeBidiMap Implementation ofBidiMapthat uses twoTreeMapinstances.DualTreeBidiMap.BidiOrderedMapIterator Inner class MapIterator.DualTreeBidiMap.ViewMap Internal sorted map view.TreeBidiMap Red-Black tree-based implementation of BidiMap where all objects added implement theComparableinterface.UnmodifiableBidiMap Decorates anotherBidiMapto ensure it can't be altered.UnmodifiableOrderedBidiMap Decorates anotherOrderedBidiMapto ensure it can't be altered.UnmodifiableSortedBidiMap Decorates anotherSortedBidiMapto ensure it can't be altered.