net.kwfgrid.gwes
Class ActivityTable

java.lang.Object
  java.util.Dictionary<K,V>
      java.util.Hashtable<String,Activity>
          net.kwfgrid.gwes.ActivityTable

All Implemented Interfaces:

Serializable, Cloneable, Map<String,Activity>

public final class ActivityTable
extends Hashtable<String,Activity>

An activity table is an extended Hashtable with Activities as values and their corresponding activity instance identifiers as keys.

Version:

$Id: ActivityTable.java 1419 2010-11-01 14:12:17Z hoheisel $

Author:

Andreas Hoheisel (www.andreas-hoheisel.de)

See Also:

Serialized Form

Constructor Summary

ActivityTable()

Method Summary

Activity	get(String activityID) Returns the activity to which the specified activityID is mapped in this hashtable.
Activity	put(String activityID, Activity activity) Maps the specified activityID to the specified activity in this table.
Activity	remove(String activityID) Removes the activityID (and its corresponding activity) from this hashtable.

Methods inherited from class java.util.Hashtable

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

Methods inherited from class java.lang.Object

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

Constructor Detail

ActivityTable

public ActivityTable()

Method Detail

put

public final Activity put(String activityID,
                          Activity activity)

Maps the specified activityID to the specified activity in this table. Neither the activityID nor the activity can be null.

Specified by:

put in interface Map<String,Activity>

Overrides:

put in class Hashtable<String,Activity>

Parameters:

activityID - The activity identifier

activity - The activity

Returns:

the previous activity of the specified activityID in this hashtable, or null if it did not have one.

get

public final Activity get(String activityID)

Returns the activity to which the specified activityID is mapped in this hashtable.

Parameters:

activityID - a activityID in the hashtable.

Returns:

the activity to which the activityID is mapped in this hashtable; null if the activityID is not mapped to any activity this hashtable.

Throws:

NullPointerException - if the activityID is null.

See Also:

put(String, Activity)

remove

public final Activity remove(String activityID)

Removes the activityID (and its corresponding activity) from this hashtable. This method does nothing if the activityID is not in the hashtable.

Parameters:

activityID - the activityID that needs to be removed.

Returns:

the activity to which the activityID had been mapped in this hashtable, or null if the activityID did not have a mapping.

Throws:

NullPointerException - if the activityID is null.