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/*
 * (C) Copyright 2006-2021, by John V Sichi 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.graph;

import java.io.*;

/**
 * IntrusiveEdge encapsulates the internals for the default edge implementation. It is not intended
 * to be referenced directly (which is why it's not public); use DefaultEdge for that.
 *
 * @author John V. Sichi
 */
class IntrusiveEdge
    implements
    Cloneable,
    Serializable
{
    private static final long serialVersionUID = 3258408452177932855L;

    Object source;

    Object target;

    /**
     * @see Object#clone()
     */
    @Override
    public Object clone()
    {
        try {
            return super.clone();
        } catch (CloneNotSupportedException e) {
            // shouldn't happen as we are Cloneable
            throw new InternalError();
        }
    }
}