/*
* Jitsi, the OpenSource Java VoIP and Instant Messaging client.
*
* Copyright @ 2015 Atlassian Pty Ltd
*
* 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 net.java.sip.communicator.service.protocol.event;
/**
* An abstract adapter class for receiving call-state (change) events. This
* class exists only as a convenience for creating listener objects.
* <p>
* Extend this class to create a <code>CallChangeEvent</code> listener and
* override the methods for the events of interest. (If you implement the
* <code>CallChangeListener</code> interface, you have to define all of the
* methods in it. This abstract class defines null methods for them all, so you
* only have to define methods for events you care about.)
* </p>
*
* @see CallChangeEvent
* @see CallChangeListener
*
* @author Lubomir Marinov
*/
public abstract class CallChangeAdapter
implements CallChangeListener
{
/**
* A dummy implementation of this listener's callPeerAdded() method.
*
* @param evt the <tt>CallPeerEvent</tt> containing the source call
* and call peer.
*/
public void callPeerAdded(CallPeerEvent evt)
{
}
/**
* A dummy implementation of this listener's callPeerRemoved() method.
*
* @param evt the <tt>CallPeerEvent</tt> containing the source call
* and call peer.
*/
public void callPeerRemoved(CallPeerEvent evt)
{
}
/**
* A dummy implementation of this listener's callStateChanged() method.
*
* @param evt the <tt>CallChangeEvent</tt> instance containing the source
* calls and its old and new state.
*/
public void callStateChanged(CallChangeEvent evt)
{
}
}