org.apache.commons.collections.bidimap
Class DualHashBidiMap
java.lang.Object
org.apache.commons.collections.bidimap.AbstractDualBidiMap
org.apache.commons.collections.bidimap.DualHashBidiMap
- All Implemented Interfaces:
- BidiMap, IterableMap, Map, Serializable
- public class DualHashBidiMap
- extends AbstractDualBidiMap
- implements Serializable
Implementation of BidiMap that uses two HashMap instances.
Two HashMap instances are used in this class.
This provides fast lookups at the expense of storing two sets of map entries.
Commons Collections would welcome the addition of a direct hash-based
implementation of the BidiMap interface.
NOTE: From Commons Collections 3.1, all subclasses will use HashMap
and the flawed createMap method is ignored.
- Since:
- Commons Collections 3.0
- Version:
- $Id: DualHashBidiMap.java,v 1.7 2004/06/11 23:27:37 scolebourne Exp $
- Author:
- Matthew Hawthorne, Stephen Colebourne
- See Also:
- Serialized Form
| Methods inherited from class org.apache.commons.collections.bidimap.AbstractDualBidiMap |
clear, containsKey, containsValue, createEntrySetIterator, createKeySetIterator, createMap, createValuesIterator, entrySet, equals, get, getKey, hashCode, inverseBidiMap, isEmpty, keySet, mapIterator, put, putAll, remove, removeValue, size, toString, values |
DualHashBidiMap
public DualHashBidiMap()
- Creates an empty
HashBidiMap.
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
DualHashBidiMap
protected DualHashBidiMap(Map normalMap,
Map reverseMap,
BidiMap inverseBidiMap)
- Constructs a
HashBidiMap that decorates the specified maps.
- Parameters:
normalMap - the normal direction mapreverseMap - the reverse direction mapinverseBidiMap - the inverse BidiMap
createBidiMap
protected BidiMap createBidiMap(Map normalMap,
Map reverseMap,
BidiMap inverseBidiMap)
- Creates a new instance of this object.
- Specified by:
createBidiMap in class AbstractDualBidiMap
- Parameters:
normalMap - the normal direction mapreverseMap - the reverse direction mapinverseBidiMap - the inverse BidiMap
- Returns:
- new bidi map
Copyright © 2001-2005 Apache Software Foundation. All Rights Reserved.