/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2012, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This 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 software 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 software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

/**
 *
 */
package org.jboss.as.controller.interfaces;

import java.io.ObjectStreamException;
import java.net.InetAddress;
import java.net.NetworkInterface;
import java.net.SocketException;

/**
 * {@link InterfaceCriteria} that tests whether a given interface is a
 * {@link NetworkInterface#isPointToPoint() point-to-point interface}.
 *
 * @author Brian Stansberry
 */
public class PointToPointInterfaceCriteria extends AbstractInterfaceCriteria {

    private static final long serialVersionUID = -3434237413172720854L;

    public static final PointToPointInterfaceCriteria INSTANCE = new PointToPointInterfaceCriteria();

    private PointToPointInterfaceCriteria() {}

    /**
     * {@inheritDoc}
     *
     * @return <code>address</code> if <code>networkInterface</code> is a
     *         {@link NetworkInterface#isPointToPoint() point-to-point interface}.
     */
    @Override
    protected InetAddress isAcceptable(NetworkInterface networkInterface, InetAddress address) throws SocketException {

        if( networkInterface.isPointToPoint() )
            return address;
        return null;
    }

    private Object readResolve() throws ObjectStreamException {
        return INSTANCE;
    }
}