public abstract class AbstractBidiMapDecorator extends AbstractMapDecorator implements BidiMap
Methods are forwarded directly to the decorated map.
This implementation does not perform any special processing with the map views. Instead it simply returns the set/collection from the wrapped map. This may be undesirable, for example if you are trying to write a validating implementation it would provide a loophole around the validation. But, you might want that loophole, so this class is kept simple.
map| Modifier | Constructor and Description |
|---|---|
protected |
AbstractBidiMapDecorator(BidiMap map)
Constructor that wraps (not copies).
|
| Modifier and Type | Method and Description |
|---|---|
protected BidiMap |
getBidiMap()
Gets the map being decorated.
|
Object |
getKey(Object value)
Gets the key that is currently mapped to the specified value.
|
BidiMap |
inverseBidiMap()
Gets a view of this map where the keys and values are reversed.
|
MapIterator |
mapIterator()
Obtains a
MapIterator over the map. |
Object |
removeValue(Object value)
Removes the key-value pair that is currently mapped to the specified
value (optional operation).
|
clear, containsKey, containsValue, entrySet, equals, get, getMap, hashCode, isEmpty, keySet, put, putAll, remove, size, toString, valuesprotected AbstractBidiMapDecorator(BidiMap map)
map - the map to decorate, must not be nullIllegalArgumentException - if the collection is nullprotected BidiMap getBidiMap()
public MapIterator mapIterator()
BidiMapMapIterator over the map.
A map iterator is an efficient way of iterating over maps. It does not require that the map is stored using Map Entry objects which can increase performance.
BidiMap map = new DualHashBidiMap();
MapIterator it = map.mapIterator();
while (it.hasNext()) {
Object key = it.next();
Object value = it.getValue();
it.setValue("newValue");
}
mapIterator in interface BidiMapmapIterator in interface IterableMappublic Object getKey(Object value)
BidiMap
If the value is not contained in the map, null is returned.
Implementations should seek to make this method perform equally as well
as get(Object).
public Object removeValue(Object value)
BidiMap
If the value is not contained in the map, null is returned.
Implementations should seek to make this method perform equally as well
as remove(Object).
removeValue in interface BidiMapvalue - the value to find the key-value pair fornull if nothing removedpublic BidiMap inverseBidiMap()
BidiMap
Changes to one map will be visible in the other and vice versa.
This enables both directions of the map to be accessed as a Map.
Implementations should seek to avoid creating a new object every time this
method is called. See AbstractMap.values() etc. Calling this
method on the inverse map should return the original.
inverseBidiMap in interface BidiMapCopyright © 2001–2015 The Apache Software Foundation. All rights reserved.