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/*
* (C) Copyright 2003-2023, by Barak Naveh and Contributors.
*
* JGraphT : a free Java graph-theory library
*
* See the CONTRIBUTORS.md file distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0, or the
* GNU Lesser General Public License v2.1 or later
* which is available at
* http://www.gnu.org/licenses/old-licenses/lgpl-2.1-standalone.html.
*
* SPDX-License-Identifier: EPL-2.0 OR LGPL-2.1-or-later
*/
package org.jgrapht.event;
import java.util.*;
/**
* A listener that is notified when the graph's vertex set changes. It should be used when
* only notifications on vertex-set changes are of interest. If all graph notifications are
* of interest better use
* GraphListener
.
*
* @param the graph vertex type
*
* @author Barak Naveh
* @see GraphListener
*/
public interface VertexSetListener
extends EventListener
{
/**
* Notifies that a vertex has been added to the graph.
*
* @param e the vertex event.
*/
void vertexAdded(GraphVertexChangeEvent e);
/**
* Notifies that a vertex has been removed from the graph.
*
* @param e the vertex event.
*/
void vertexRemoved(GraphVertexChangeEvent e);
}