1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * ident        "%Z%%M% %I%     %E% SMI"
  24  *
  25  * Copyright 2002 Sun Microsystems, Inc.  All rights reserved.
  26  * Use is subject to license terms.
  27  */
  28 
  29 package com.sun.dhcpmgr.data.qualifier;
  30 
  31 import java.util.regex.*;
  32 
  33 /**
  34  * An implementation of the qualifier type that provides a string type
  35  * where values must be a valid IPv4 address.
  36  */
  37 public class QualifierIPv4 extends QualifierString {
  38 
  39     private static final String octetRegex =
  40                                     "0*(1?[0-9]{1,2}|2([0-4][0-9]|5[0-5]))";
  41 
  42     private static final String addressRegex =
  43                                     "(" + octetRegex + "[.]){3}" + octetRegex;
  44 
  45     private static Pattern pattern;
  46 
  47     public Object parseValue(String value) {
  48         if (value == null) {
  49             return null;
  50         }
  51 
  52         value = value.trim();
  53 
  54         Matcher matcher = pattern.matcher(value);
  55 
  56         return (matcher.matches() ? value : null);
  57     }
  58 
  59     static {
  60         pattern = Pattern.compile(addressRegex);
  61     }
  62 }