org.onemind.commons.java.datastructure
Class TrackedMap

java.lang.Object
  java.util.AbstractMap<K,V>
      java.util.HashMap
          org.onemind.commons.java.datastructure.TrackedMap

All Implemented Interfaces:

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

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

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

java.util.AbstractMap.SimpleEntry<K,V>, java.util.AbstractMap.SimpleImmutableEntry<K,V>

Field Summary

private java.util.Map

_tracked the track inner map *

Constructor Summary

TrackedMap()

TrackedMap(int initialCapacity)

TrackedMap(int initialCapacity, float loadFactor)

TrackedMap(java.util.Map map)

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

Field Detail

_tracked

private java.util.Map _tracked

the track inner map *

Constructor Detail

TrackedMap

public TrackedMap()

TrackedMap

public TrackedMap(int initialCapacity)

TrackedMap

public TrackedMap(int initialCapacity,
                  float loadFactor)

TrackedMap

public TrackedMap(java.util.Map map)

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)

Specified by:

get in interface java.util.Map

Overrides:

get in class java.util.HashMap

makeUpToDate

public void makeUpToDate()

Make this map as up-to-date.

clearChanges

public void clearChanges()

Clear all the changes

clear

public void clear()

Specified by:

clear in interface java.util.Map

Overrides:

clear in class java.util.HashMap

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map

Overrides:

containsKey in class java.util.HashMap

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map

Overrides:

containsValue in class java.util.HashMap

entrySet

public java.util.Set entrySet()

Specified by:

entrySet in interface java.util.Map

Overrides:

entrySet in class java.util.HashMap

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map

Overrides:

isEmpty in class java.util.HashMap

keySet

public java.util.Set keySet()

Specified by:

keySet in interface java.util.Map

Overrides:

keySet in class java.util.HashMap

remove

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

Specified by:

remove in interface java.util.Map

Overrides:

remove in class java.util.HashMap

size

public int size()

Specified by:

size in interface java.util.Map

Overrides:

size in class java.util.HashMap

values

public java.util.Collection values()

Specified by:

values in interface java.util.Map

Overrides:

values in class java.util.HashMap