001package voyeur; 002/*- 003 * ########################################################################## 004 * Local Area Network Voyeur 005 * %% 006 * Copyright (C) 2019 - 2022 Allen D. Ball 007 * %% 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 * ########################################################################## 020 */ 021import java.math.BigInteger; 022import java.net.InetAddress; 023import java.util.Comparator; 024import java.util.concurrent.ConcurrentSkipListMap; 025 026/** 027 * {@link InetAddress} {@link java.util.Map} abstract base class. 028 * 029 * @author {@link.uri mailto:ball@hcf.dev Allen D. Ball} 030 */ 031public abstract class InetAddressMap<V> extends ConcurrentSkipListMap<InetAddress,V> { 032 private static final long serialVersionUID = 4096581096396052201L; 033 034 private static final Comparator<InetAddress> COMPARATOR = 035 Comparator 036 .<InetAddress>comparingInt(t -> t.isLoopbackAddress() ? -1 : 1) 037 .thenComparingInt(t -> t.getAddress().length) 038 .thenComparing(t -> new BigInteger(1, t.getAddress())); 039 040 /** 041 * Sole constructor. 042 */ 043 protected InetAddressMap() { super(COMPARATOR); } 044}