org.onemind.commons.java.datastructure
Class TrackedMap

java.lang.Object
  java.util.AbstractMap
      java.util.HashMap
          org.onemind.commons.java.datastructure.TrackedMap

All Implemented Interfaces:

java.lang.Cloneable, java.util.Map, java.io.Serializable

public class TrackedMap

extends java.util.HashMap

A map that has it's map values changes tracked. It uses an inner map to keep the unchanged value and itself to track the changes

Version:

$Id: TrackedMap.java,v 1.2 2004/08/26 12:33:16 thlee Exp $ $Name: $

Author:

TiongHiang Lee (thlee@onemindsoft.org)

See Also:

Serialized Form

Constructor Summary

TrackedMap()
{@inheritDoc}

TrackedMap(int initialCapacity)
{@inheritDoc}

TrackedMap(int initialCapacity, float loadFactor)
{@inheritDoc}

TrackedMap(java.util.Map map)
{@inheritDoc}

Method Summary

void	clear()
void	clearChanges() Clear all the changes
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set	entrySet()
java.lang.Object	get(java.lang.Object key)
java.util.Set	getChangedKeySet() Return the key set of changed values
boolean	hasChanges() Return whether this map has been changes
boolean	isEmpty()
java.util.Set	keySet()
void	makeUpToDate() Make this map as up-to-date.
java.lang.Object	remove(java.lang.Object key)
int	size()
java.util.Collection	values()

Methods inherited from class java.util.HashMap

clone, put, putAll

Methods inherited from class java.util.AbstractMap

equals, hashCode, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.util.Map

equals, hashCode

Constructor Detail

TrackedMap

public TrackedMap()

{@inheritDoc}

TrackedMap

public TrackedMap(int initialCapacity)

{@inheritDoc}

TrackedMap

public TrackedMap(int initialCapacity,
                  float loadFactor)

{@inheritDoc}

TrackedMap

public TrackedMap(java.util.Map map)

{@inheritDoc}

Method Detail

hasChanges

public boolean hasChanges()

Return whether this map has been changes

Returns:

true if it has been changed

getChangedKeySet

public java.util.Set getChangedKeySet()

Return the key set of changed values

Returns:

the key set

get

public java.lang.Object get(java.lang.Object key)

makeUpToDate

public void makeUpToDate()

Make this map as up-to-date.

clearChanges

public void clearChanges()

Clear all the changes

clear

public void clear()

containsKey

public boolean containsKey(java.lang.Object key)

containsValue

public boolean containsValue(java.lang.Object value)

entrySet

public java.util.Set entrySet()

isEmpty

public boolean isEmpty()

keySet

public java.util.Set keySet()

remove

public java.lang.Object remove(java.lang.Object key)

size

public int size()

values

public java.util.Collection values()