/* Copyright (c) 2009 Google Inc.
*
* 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 com.google.wave.api.event;
import com.google.wave.api.Wavelet;
import com.google.wave.api.impl.EventMessageBundle;
import java.util.ArrayList;
import java.util.List;
/**
* Event triggered when participants are added and/or removed from a wavelet.
*/
public class WaveletParticipantsChangedEvent extends AbstractEvent {
/** The newly added participants. */
private final List<String> participantsAdded;
/** The removed participants. */
private final List<String> participantsRemoved;
/**
* Constructor.
*
* @param wavelet the wavelet in which the participants were added or removed.
* @param bundle the message bundle this event belongs to.
* @param modifiedBy the id of the participant that triggered this event.
* @param timestamp the timestamp of this event.
* @param rootBlipId the root blip id of the wavelet where this event occurs.
* @param participantsAdded the added participants.
* @param participantsRemoved the removed participants.
*/
public WaveletParticipantsChangedEvent(Wavelet wavelet, EventMessageBundle bundle,
String modifiedBy, Long timestamp, String rootBlipId, List<String> participantsAdded,
List<String> participantsRemoved) {
super(EventType.WAVELET_PARTICIPANTS_CHANGED, wavelet, bundle, modifiedBy, timestamp,
rootBlipId);
this.participantsAdded = new ArrayList<String>(participantsAdded);
this.participantsRemoved = new ArrayList<String>(participantsRemoved);
}
/**
* Constructor for deserialization.
*/
WaveletParticipantsChangedEvent() {
this.participantsAdded = null;
this.participantsRemoved = null;
}
/**
* Returns a list of the new participants.
*
* @return the added participants.
*/
public List<String> getParticipantsAdded() {
return participantsAdded;
}
/**
* Returns a list of the removed participants.
*
* @return the removed participants.
*/
public List<String> getParticipantsRemoved() {
return participantsRemoved;
}
/**
* Helper method for type conversion.
*
* @return the concrete type of this event, or {@code null} if it is of a
* different event type.
*/
public static WaveletParticipantsChangedEvent as(Event event) {
if (!(event instanceof WaveletParticipantsChangedEvent)) {
return null;
}
return WaveletParticipantsChangedEvent.class.cast(event);
}
}