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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;
/**
* A listener that is notified when the graph changes.
*
*
* If only notifications on vertex set changes are required it is more efficient to use the
* VertexSetListener.
*
*
* @param the graph vertex type
* @param the graph edge type
*
* @author Barak Naveh
* @see VertexSetListener
*/
public interface GraphListener
extends VertexSetListener
{
/**
* Notifies that an edge has been added to the graph.
*
* @param e the edge event.
*/
void edgeAdded(GraphEdgeChangeEvent e);
/**
* Notifies that an edge has been removed from the graph.
*
* @param e the edge event.
*/
void edgeRemoved(GraphEdgeChangeEvent e);
/**
* Notifies that an edge weight has been updated.
*
* @param e the edge event.
*/
default void edgeWeightUpdated(GraphEdgeChangeEvent e)
{
}
}