001/* 002 * (C) Copyright 2011 Nuxeo SAS (http://nuxeo.com/) and contributors. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the GNU Lesser General Public License 006 * (LGPL) version 2.1 which accompanies this distribution, and is available at 007 * http://www.gnu.org/licenses/lgpl.html 008 * 009 * This library is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * Contributors: 015 * tdelprat 016 * 017 */ 018 019package org.nuxeo.wizard.helpers; 020 021import java.util.regex.Matcher; 022import java.util.regex.Pattern; 023 024/** 025 * RegExp based helper to check IP address format 026 * 027 * @author Tiry (tdelprat@nuxeo.com) 028 * @since 5.4.2 029 */ 030public class IPValidator { 031 032 private static Pattern pattern; 033 034 private static Matcher matcher; 035 036 private static final String IPADDRESS_PATTERN = "^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." 037 + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." 038 + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])$"; 039 040 public static synchronized boolean validate(String ip) { 041 if (pattern == null) { 042 pattern = Pattern.compile(IPADDRESS_PATTERN); 043 } 044 matcher = pattern.matcher(ip); 045 return matcher.matches(); 046 } 047}