/*

 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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 General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package jdk.dns.client;

import java.net.Inet4Address;

import java.net.Inet6Address;

import java.net.InetAddress;

import java.net.ProtocolFamily;

import java.net.StandardProtocolFamily;

public enum AddressFamily {

    IPv4,

    IPv6,

    ANY;

    public static AddressFamily fromProtocolFamily(ProtocolFamily protocolFamily) {

        if (protocolFamily == StandardProtocolFamily.INET) {

            return IPv4;

        } else if (protocolFamily == StandardProtocolFamily.INET6) {

            return IPv6;

        } else {

            return ANY;

        }

    }

    public boolean sameFamily(InetAddress inetAddress) {

        switch (this) {

            case IPv4:

                return inetAddress instanceof Inet4Address;

            case IPv6:

                return inetAddress instanceof Inet6Address;

            case ANY:

                return true;

            default:

                return false;

        }

    }

    public static AddressFamily fromInetAddress(InetAddress addr) {

        return addr instanceof Inet4Address ? IPv4 : addr instanceof Inet6Address ? IPv6 : ANY;

    }

}