DefaultEdge.java

/* ==========================================
 * JGraphT : a free Java graph-theory library
 * ==========================================
 *
 * Project Info:  http://jgrapht.sourceforge.net/
 * Project Creator:  Barak Naveh (http://sourceforge.net/users/barak_naveh)
 *
 * (C) Copyright 2003-2008, by Barak Naveh and Contributors.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or
 * (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
 * License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation,
 * Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
 */
/* ----------------
 * DefaultEdge.java
 * ----------------
 * (C) Copyright 2003-2008, by Barak Naveh and Contributors.
 *
 * Original Author:  Barak Naveh
 * Contributor(s):   Christian Hammer
 *
 * $Id: DefaultEdge.java 645 2008-09-30 19:44:48Z perfecthash $
 *
 * Changes
 * -------
 * 24-Jul-2003 : Initial revision (BN);
 * 10-Aug-2003 : General edge refactoring (BN);
 * 11-Mar-2004 : Made generic (CH);
 * 28-May-2006 : Moved connectivity info from edge to graph (JVS);
 *
 */
package edu.nd.nina.graph;

import edu.nd.nina.*;


/**
 * A default implementation for edges in a {@link Graph}.
 *
 * @author Barak Naveh
 * @since Jul 14, 2003
 */
public class DefaultEdge
    extends IntrusiveEdge
{
    //~ Static fields/initializers ---------------------------------------------

    private static final long serialVersionUID = 3258408452177932855L;

    //~ Methods ----------------------------------------------------------------

    /**
     * Retrieves the source of this edge. This is protected, for use by
     * subclasses only (e.g. for implementing toString).
     *
     * @return source of this edge
     */
    protected Object getSource()
    {
        return source;
    }

    /**
     * Retrieves the target of this edge. This is protected, for use by
     * subclasses only (e.g. for implementing toString).
     *
     * @return target of this edge
     */
    protected Object getTarget()
    {
        return target;
    }

    public String toString()
    {
        return "(" + source + " : " + target + ")";
    }
}

// End DefaultEdge.java