001/*
002 * (C) Copyright 2011 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     tdelprat
018 *
019 */
020
021package org.nuxeo.wizard.helpers;
022
023import java.util.regex.Matcher;
024import java.util.regex.Pattern;
025
026/**
027 * RegExp based helper to check IP address format
028 *
029 * @author Tiry (tdelprat@nuxeo.com)
030 * @since 5.4.2
031 */
032public class IPValidator {
033
034    private static Pattern pattern;
035
036    private static Matcher matcher;
037
038    private static final String IPADDRESS_PATTERN = "^([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."
039            + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\." + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])\\."
040            + "([01]?\\d\\d?|2[0-4]\\d|25[0-5])$";
041
042    public static synchronized boolean validate(String ip) {
043        if (pattern == null) {
044            pattern = Pattern.compile(IPADDRESS_PATTERN);
045        }
046        matcher = pattern.matcher(ip);
047        return matcher.matches();
048    }
049}