/*
 * 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 peer (change) events. This class
 * exists only as a convenience for creating listener objects.
 * <p>
 * Extend this class to create a <tt>CallPeerChangeEvent</tt> listener and
 * override the methods for the events of interest. (If you implement the
 * <tt>CallPeerListener</tt> 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 CallPeerChangeEvent
 * @see CallPeerListener
 *
 * @author Lubomir Marinov
 */
public abstract class CallPeerAdapter
    implements CallPeerListener
{

    /**
     * Indicates that a change has occurred in the address of the source
     * <tt>CallPeer</tt>.
     *
     * @param evt the <tt>CallPeerChangeEvent</tt> instance containing the
     * source event as well as its previous and its new address
     */
    public void peerAddressChanged(CallPeerChangeEvent evt)
    {
    }

    /**
     * Indicates that a change has occurred in the display name of the source
     * <tt>CallPeer</tt>.
     *
     * @param evt the <tt>CallPeerChangeEvent</tt> instance containing the
     * source event as well as its previous and its new display names
     */
    public void peerDisplayNameChanged(CallPeerChangeEvent evt)
    {
    }

    /**
     * Indicates that a change has occurred in the image of the source
     * <tt>CallPeer</tt>.
     *
     * @param evt the <tt>CallPeerChangeEvent</tt> instance containing the
     * source event as well as its previous and its new image
     */
    public void peerImageChanged(CallPeerChangeEvent evt)
    {
    }

    /**
     * Indicates that a change has occurred in the status of the source
     * <tt>CallPeer</tt>.
     *
     * @param evt the <tt>CallPeerChangeEvent</tt> instance containing the
     * source event as well as its previous and its new status
     */
    public void peerStateChanged(CallPeerChangeEvent evt)
    {
    }

    /**
     * Indicates that a change has occurred in the transport address that we use
     * to communicate with the source <tt>CallPeer</tt>.
     *
     * @param evt the <tt>CallPeerChangeEvent</tt> instance containing the
     * source event as well as its previous and its new transport address
     */
    public void peerTransportAddressChanged(CallPeerChangeEvent evt)
    {
    }
}