org.apache.commons.collections.bidimap

Class DualHashBidiMap

java.lang.Object
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+--org.apache.commons.collections.bidimap.AbstractDualBidiMap
   |
   +--org.apache.commons.collections.bidimap.DualHashBidiMap

All Implemented Interfaces:
BidiMap, Serializable

public class DualHashBidiMap
extends AbstractDualBidiMap
implements Serializable

Implementation of BidiMap that uses two HashMap instances.

Since:

Commons Collections 3.0

Authors:

Matthew Hawthorne
Stephen Colebourne

Constructor Summary

DualHashBidiMap()

Creates an empty HashBidiMap

DualHashBidiMap(Map map)

Constructs a HashBidiMap and copies the mappings from specified Map.

DualHashBidiMap(Map normalMap, Map reverseMap, BidiMap inverseBidiMap)

Constructs a HashBidiMap that decorates the specified maps.

Method Summary

BidiMap

createBidiMap(Map normalMap, Map reverseMap, BidiMap inverseBidiMap)

Creates a new instance of this object.

Map

createMap()

Creates a new instance of the map used by the subclass to store data.

Constructor Details

DualHashBidiMap

public DualHashBidiMap()

Creates an empty HashBidiMap

DualHashBidiMap

protected DualHashBidiMap(Map normalMap, Map reverseMap, BidiMap inverseBidiMap)

Constructs a HashBidiMap that decorates the specified maps.

Parameters:

normalMap - the normal direction map
reverseMap - the reverse direction map
inverseBidiMap - the inverse BidiMap

DualHashBidiMap

public DualHashBidiMap(Map map)

Constructs a HashBidiMap and copies the mappings from specified Map.

Parameters:

map - the map whose mappings are to be placed in this map

Method Details

createBidiMap

protected BidiMap createBidiMap(Map normalMap, Map reverseMap, BidiMap inverseBidiMap)

Creates a new instance of this object.

Parameters:

normalMap - the normal direction map
reverseMap - the reverse direction map
inverseBidiMap - the inverse BidiMap

Returns:

new bidi map

createMap

protected Map createMap()

Creates a new instance of the map used by the subclass to store data.

Returns:

the map to be used for internal storage