/**
* $RCSfile$
* $Revision: 4538 $
* $Date: 2006-07-18 09:14:33 +0400 (Tue, 18 Jul 2006) $
*
* Copyright 2003-2004 Jive Software.
*
* All rights reserved. Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jivesoftware.smack;
import org.jivesoftware.smack.filter.PacketIDFilter;
import org.jivesoftware.smack.packet.IQ;
import org.jivesoftware.smack.packet.RosterPacket;
import org.jivesoftware.smack.util.StringUtils;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/**
* A group of roster entries.
*
* @see Roster#getGroup(String)
* @author Matt Tucker
*/
public class RosterGroup {
private String name;
private XMPPConnection connection;
private final List<RosterEntry> entries;
/**
* Creates a new roster group instance.
*
* @param name the name of the group.
* @param connection the connection the group belongs to.
*/
RosterGroup(String name, XMPPConnection connection) {
this.name = name;
this.connection = connection;
entries = new ArrayList<RosterEntry>();
}
/**
* Returns the name of the group.
*
* @return the name of the group.
*/
public String getName() {
return name;
}
/**
* Sets the name of the group. Changing the group's name is like moving all the group entries
* of the group to a new group specified by the new name. Since this group won't have entries
* it will be removed from the roster. This means that all the references to this object will
* be invalid and will need to be updated to the new group specified by the new name.
*
* @param name the name of the group.
*/
public void setName(String name) {
synchronized (entries) {
for (RosterEntry entry : entries) {
RosterPacket packet = new RosterPacket();
packet.setType(IQ.Type.SET);
RosterPacket.Item item = RosterEntry.toRosterItem(entry);
item.removeGroupName(this.name);
item.addGroupName(name);
packet.addRosterItem(item);
connection.sendPacket(packet);
}
}
}
/**
* Returns the number of entries in the group.
*
* @return the number of entries in the group.
*/
public int getEntryCount() {
synchronized (entries) {
return entries.size();
}
}
/**
* Returns an unmodifiable collection of all entries in the group.
*
* @return all entries in the group.
*/
public Collection<RosterEntry> getEntries() {
synchronized (entries) {
return Collections.unmodifiableList(new ArrayList<RosterEntry>(entries));
}
}
/**
* Returns the roster entry associated with the given XMPP address or
* <tt>null</tt> if the user is not an entry in the group.
*
* @param user the XMPP address of the user (eg "jsmith@example.com").
* @return the roster entry or <tt>null</tt> if it does not exist in the group.
*/
public RosterEntry getEntry(String user) {
if (user == null) {
return null;
}
// Roster entries never include a resource so remove the resource
// if it's a part of the XMPP address.
user = StringUtils.parseBareAddress(user);
String userLowerCase = user.toLowerCase();
synchronized (entries) {
for (RosterEntry entry : entries) {
if (entry.getUser().equals(userLowerCase)) {
return entry;
}
}
}
return null;
}
/**
* Returns true if the specified entry is part of this group.
*
* @param entry a roster entry.
* @return true if the entry is part of this group.
*/
public boolean contains(RosterEntry entry) {
synchronized (entries) {
return entries.contains(entry);
}
}
/**
* Returns true if the specified XMPP address is an entry in this group.
*
* @param user the XMPP address of the user.
* @return true if the XMPP address is an entry in this group.
*/
public boolean contains(String user) {
return getEntry(user) != null;
}
/**
* Adds a roster entry to this group. If the entry was unfiled then it will be removed from
* the unfiled list and will be added to this group.
*
* @param entry a roster entry.
* @throws XMPPException if an error occured while trying to add the entry to the group.
*/
public void addEntry(RosterEntry entry) throws XMPPException {
PacketCollector collector = null;
// Only add the entry if it isn't already in the list.
synchronized (entries) {
if (!entries.contains(entry)) {
RosterPacket packet = new RosterPacket();
packet.setType(IQ.Type.SET);
RosterPacket.Item item = RosterEntry.toRosterItem(entry);
item.addGroupName(getName());
packet.addRosterItem(item);
// Wait up to a certain number of seconds for a reply from the server.
collector = connection
.createPacketCollector(new PacketIDFilter(packet.getPacketID()));
connection.sendPacket(packet);
}
}
if (collector != null) {
IQ response = (IQ) collector.nextResult(SmackConfiguration.getPacketReplyTimeout());
collector.cancel();
if (response == null) {
throw new XMPPException("No response from the server.");
}
// If the server replied with an error, throw an exception.
else if (response.getType() == IQ.Type.ERROR) {
throw new XMPPException(response.getError());
}
// Add the new entry to the group since the server processed the request successfully
addEntryLocal(entry);
}
}
/**
* Removes a roster entry from this group. If the entry does not belong to any other group
* then it will be considered as unfiled, therefore it will be added to the list of unfiled
* entries.
*
* @param entry a roster entry.
* @throws XMPPException if an error occured while trying to remove the entry from the group.
*/
public void removeEntry(RosterEntry entry) throws XMPPException {
PacketCollector collector = null;
// Only remove the entry if it's in the entry list.
// Remove the entry locally, if we wait for RosterPacketListenerprocess>>Packet(Packet)
// to take place the entry will exist in the group until a packet is received from the
// server.
synchronized (entries) {
if (entries.contains(entry)) {
RosterPacket packet = new RosterPacket();
packet.setType(IQ.Type.SET);
RosterPacket.Item item = RosterEntry.toRosterItem(entry);
item.removeGroupName(this.getName());
packet.addRosterItem(item);
// Wait up to a certain number of seconds for a reply from the server.
collector = connection
.createPacketCollector(new PacketIDFilter(packet.getPacketID()));
connection.sendPacket(packet);
}
}
if (collector != null) {
IQ response = (IQ) collector.nextResult(SmackConfiguration.getPacketReplyTimeout());
collector.cancel();
if (response == null) {
throw new XMPPException("No response from the server.");
}
// If the server replied with an error, throw an exception.
else if (response.getType() == IQ.Type.ERROR) {
throw new XMPPException(response.getError());
}
// Remove the entry locally since the server processed the request successfully
removeEntryLocal(entry);
}
}
void addEntryLocal(RosterEntry entry) {
// Only add the entry if it isn't already in the list.
synchronized (entries) {
entries.remove(entry);
entries.add(entry);
}
}
void removeEntryLocal(RosterEntry entry) {
// Only remove the entry if it's in the entry list.
synchronized (entries) {
if (entries.contains(entry)) {
entries.remove(entry);
}
}
}
}