org.exolab.castor.util

Class OrderedHashMap

public class OrderedHashMap extends HashMap

A very simple extended HashMap, which maintains order via an ArrayList. This class provides similar, though not identical, functionality as the JDK's LinkedHashMap, but works under JDK 1.2 and JDK 1.3. This class is not synchronized, if more than one thread accesses an instance of this class and at least one thread modifies the map, the OrderedHashMap instance must be synchronized via a call to Collections.synchronizedMap method. The #entrySet() and #keySet() methods return unmodifiable sets. The #values() method returns an unmodifiable collection.

Version: $Revision: 6230 $ $Date: 2005-12-13 14:58:48 -0700 (Tue, 13 Dec 2005) $

Author: Keith Visco

Constructor Summary
	OrderedHashMap() Creates a new OrderedHashMap
	OrderedHashMap(int initialCapacity) Creates a new OrderedHashMap with the given initial capacity
	OrderedHashMap(Map m) Creates a new OrderedHashMap with the same entries as the given map.

Method Summary
void	clear()
Object	clone()
Set	entrySet() Returns the Map.Entry set for this Map.
Set	keySet() Returns the key set for this Map.
Object	put(Object key, Object value)
void	putAll(Map m)
Object	remove(Object key)
Collection	values() Returns the set of values for this Map.

Parameters: initialCapacity

OrderedHashMap

public OrderedHashMap(Map m)

Creates a new OrderedHashMap with the same entries as the given map.

Parameters: m the Map to initialize this Map with

Class OrderedHashMap

Constructor Detail

OrderedHashMap

OrderedHashMap

OrderedHashMap

Method Detail

clear

clone

entrySet

keySet

put

putAll

remove

values