Java InetAddress sortKey(InetAddress address, boolean prefer_v6)

Description

Sorts an address by preference.

License

Apache License

Declaration

static int sortKey(InetAddress address, boolean prefer_v6) 

Method Source Code

//package com.java2s;
/*/*w w  w.  ja va 2  s.  c  om*/
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

import java.net.InetAddress;

public class Main {
    /** Sorts an address by preference. This way code like publishing can just pick the first one */
    static int sortKey(InetAddress address, boolean prefer_v6) {
        int key = address.getAddress().length;
        if (prefer_v6) {
            key = -key;
        }

        if (address.isAnyLocalAddress()) {
            key += 5;
        }
        if (address.isMulticastAddress()) {
            key += 4;
        }
        if (address.isLoopbackAddress()) {
            key += 3;
        }
        if (address.isLinkLocalAddress()) {
            key += 2;
        }
        if (address.isSiteLocalAddress()) {
            key += 1;
        }

        return key;
    }
}

Related

1. readInetAddress(final DataInput in, final boolean fixedLength)
2. readInetAddress(final String stringInetAddress)
3. remove(InetAddress[] a_, InetAddress b)
4. removeNull(InetAddress addrs[])
5. serialize(InetAddress endpoint, DataOutput out)
6. toStringWithNoHostname(InetAddress address)
7. writeInetAddress(final InetAddress inetAddress, final DataOutput out, final boolean fixedLength)