/** * The MIT License (MIT) * * Copyright (c) 2011-2017, Yannis Gonianakis * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.github.jgonian.ipmath; import java.io.Serializable; import java.util.Collections; import java.util.Comparator; public final class StartAndSizeComparator<C extends Rangeable<C, R>, R extends Range<C, R>> implements Comparator<R>, Serializable { private static final long serialVersionUID = 1L; private static Comparator<?> instance; private static Comparator<?> reverse; @SuppressWarnings("unchecked") public static <C extends Rangeable<C, R>, R extends Range<C, R>> Comparator<R> get() { return (Comparator<R>) (instance == null ? instance = new StartAndSizeComparator<C, R>() : instance); } @SuppressWarnings("unchecked") public static <C extends Rangeable<C, R>, R extends Range<C, R>> Comparator<R> reverse() { return (Comparator<R>) (reverse == null ? reverse = Collections.reverseOrder(StartAndSizeComparator.<C, R>get()) : reverse); } private StartAndSizeComparator() { } @Override public int compare(R left, R right) { int result = left.start().compareTo(right.start()); if (result == 0) { result = left.end().compareTo(right.end()); } return result; } }