Package org.jivesoftware.openfire.roster

Class DefaultRosterItemProvider

java.lang.Object

org.jivesoftware.openfire.roster.DefaultRosterItemProvider

All Implemented Interfaces:

RosterItemProvider

public class DefaultRosterItemProvider
extends Object
implements RosterItemProvider

Defines the provider methods required for creating, reading, updating and deleting roster items.

Rosters are another user resource accessed via the user or chatbot's long ID. A user/chatbot may have zero or more roster items and each roster item may have zero or more groups. Each roster item is additionaly keyed on a XMPP jid. In most cases, the entire roster will be read in from memory and manipulated or sent to the user. However some operations will need to retrive specific roster items rather than the entire roster.

Author:

Iain Shigeoka

Constructor Summary

Constructors

Constructor	Description
DefaultRosterItemProvider()

Method Summary

Modifier and Type	Method	Description
RosterItem	createItem(String username, RosterItem item)	Creates a new roster item for the given user (optional operation).
void	deleteItem(String username, long rosterItemID)	Delete the roster item with the given itemJID for the user (optional operation).
int	getItemCount(String username)	Obtain a count of the number of roster items available for the given user.
Iterator<RosterItem>	getItems(String username)	Retrieve an iterator of RosterItems for the given user.
Iterator<String>	getUsernames(String jid)	Returns an iterator on the usernames whose roster includes the specified JID.
void	updateItem(String username, RosterItem item)	Update the roster item in storage with the information contained in the given item (optional operation).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultRosterItemProvider

public DefaultRosterItemProvider()

Method Detail

createItem

public RosterItem createItem(String username,
                             RosterItem item)
                      throws UserAlreadyExistsException

Description copied from interface: RosterItemProvider

Creates a new roster item for the given user (optional operation).

Important! The item passed as a parameter to this method is strictly a convenience for passing all of the data needed for a new roster item. The roster item returned from the method will be cached by Openfire. In some cases, the roster item passed in will be passed back out. However, if an implementation may return RosterItems as a separate class (for example, a RosterItem that directly accesses the backend storage, or one that is an object in an object database).

Specified by:

createItem in interface RosterItemProvider

Parameters:

username - the username of the user/chatbot that owns the roster item.

item - the settings for the roster item to create.

Returns:

the new roster item.

Throws:

UserAlreadyExistsException - if a roster item with the username already exists.

updateItem

public void updateItem(String username,
                       RosterItem item)

Description copied from interface: RosterItemProvider

Update the roster item in storage with the information contained in the given item (optional operation).

If you don't want roster items edited through openfire, throw UnsupportedOperationException.

Specified by:

updateItem in interface RosterItemProvider

Parameters:

username - the username of the user/chatbot that owns the roster item

item - The roster item to update

deleteItem

public void deleteItem(String username,
                       long rosterItemID)

Description copied from interface: RosterItemProvider

Delete the roster item with the given itemJID for the user (optional operation).

If you don't want roster items deleted through openfire, throw UnsupportedOperationException.

Specified by:

deleteItem in interface RosterItemProvider

Parameters:

username - the long ID of the user/chatbot that owns the roster item

rosterItemID - The roster item to delete

getUsernames

public Iterator<String> getUsernames(String jid)

Description copied from interface: RosterItemProvider

Returns an iterator on the usernames whose roster includes the specified JID.

Specified by:

getUsernames in interface RosterItemProvider

Parameters:

jid - the jid that the rosters should include.

Returns:

an iterator on the usernames whose roster includes the specified JID.

getItemCount

public int getItemCount(String username)

Description copied from interface: RosterItemProvider

Obtain a count of the number of roster items available for the given user.

Specified by:

getItemCount in interface RosterItemProvider

Parameters:

username - the username of the user/chatbot that owns the roster items

Returns:

The number of roster items available for the user

getItems

public Iterator<RosterItem> getItems(String username)

Description copied from interface: RosterItemProvider

Retrieve an iterator of RosterItems for the given user.

This method will commonly be called when a user logs in. The data will be cached in memory when possible. However, some rosters may be very large so items may need to be retrieved from the provider more frequently than usual for provider data.

Specified by:

getItems in interface RosterItemProvider

Parameters:

username - the username of the user/chatbot that owns the roster items

Returns:

An iterator of all RosterItems owned by the user