com.prosyst.util.hash
Class TrackingHashtable

java.lang.Object
  java.util.Dictionary
      java.util.Hashtable
          com.prosyst.util.hash.TrackingHashtable

All Implemented Interfaces:

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

public class TrackingHashtable
extends java.util.Hashtable

An implementation of Hashtable which tracks all changes made in the table. This version is only 1.1 compatible and DOES NOT track changes made in the table from Set or Collection views, and from the JDK 1.2 method putAll.

Author:

Nikolay Kristev

See Also:

Serialized Form

Constructor Summary

TrackingHashtable(java.util.Hashtable source)
Create a TrackingHashtable which is populated with the elements in another Hashtable

Method Summary

java.util.Vector	getChanges()
java.lang.Object	put(java.lang.Object key, java.lang.Object value)
java.lang.Object	remove(java.lang.Object key)
void	startTracking(boolean deleteRecords) Start tracking changes in the Hashtable
void	stopTracking(boolean deleteRecords) Stop tracking changes in the Hashtable

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, putAll, rehash, size, toString, values

Methods inherited from class java.lang.Object

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

Constructor Detail

TrackingHashtable

public TrackingHashtable(java.util.Hashtable source)

Create a TrackingHashtable which is populated with the elements in another Hashtable

Parameters:

source - the Hashtable to use for starting elements. If it is null or empty Hashtable, just do not use any starting elements.

Method Detail

startTracking

public void startTracking(boolean deleteRecords)

Start tracking changes in the Hashtable

Parameters:

deleteRecords - if true, delete all records of changes

stopTracking

public void stopTracking(boolean deleteRecords)

Stop tracking changes in the Hashtable

Parameters:

deleteRecords - if true, delete all records of changes

getChanges

public java.util.Vector getChanges()

put

public java.lang.Object put(java.lang.Object key,
                            java.lang.Object value)

Specified by:

put in interface java.util.Map

Overrides:

put in class java.util.Hashtable

remove

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

Specified by:

remove in interface java.util.Map

Overrides:

remove in class java.util.Hashtable