001/* 002 * Copyright 2015-2020 the original author or authors 003 * 004 * This software is licensed under the Apache License, Version 2.0, 005 * the GNU Lesser General Public License version 2 or later ("LGPL") 006 * and the WTFPL. 007 * You may choose either license to govern your use of this software only 008 * upon the condition that you accept all of the terms of either 009 * the Apache License 2.0, the LGPL 2.1+ or the WTFPL. 010 */ 011package org.minidns.dnslabel; 012 013/** 014 * A DNS label with a leading or trailing hyphen ('-'). 015 */ 016public final class LeadingOrTrailingHyphenLabel extends NonLdhLabel { 017 018 protected LeadingOrTrailingHyphenLabel(String label) { 019 super(label); 020 } 021 022 protected static boolean isLeadingOrTrailingHypenLabelInternal(String label) { 023 if (label.isEmpty()) { 024 return false; 025 } 026 027 if (label.charAt(0) == '-') { 028 return true; 029 } 030 031 if (label.charAt(label.length() - 1) == '-') { 032 return true; 033 } 034 035 return false; 036 } 037}