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Java > Open Source Codes > com > sslexplorer > input > validators > HostnameOrIPAddressValidator


1 /*
2  * SSL-Explorer
3  *
4  * Copyright (C) 2003-2006 3SP LTD. All Rights Reserved
5  *
6  * This program is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public License
8  * as published by the Free Software Foundation; either version 2 of
9  * the License, or (at your option) any later version.
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public
16  * License along with this program; if not, write to the Free Software
17  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18  */
19             
20 package com.sslexplorer.input.validators;
21
22 import java.util.regex.Pattern JavaDoc;
23  
24 /**
25  * A validator for hostname / ipaddress and port strings in the format
26  * <i>hostname</i> or <i>ipAddress</i>.
27  *
28  * @author James Robinson <a HREF="mailto: james@3sp.com">&lt;james@3sp.com&gt;</a>
29  */
30 public class HostnameOrIPAddressValidator extends StringValidator {
31     
32     private static final int MAX_HOST_OR_IP_CHARS = 255;
33     /**
34      * Regular expression for a string in the format <i>hostname</i> or
35      * <i>ipAddress</i>.
36      */
37     final static String JavaDoc HOST_PATTERN = "^[a-zA-Z0-9\\.\\-\\_]*";
38
39     /**
40      * Constructor.
41      */
42     public HostnameOrIPAddressValidator() {
43         super(1, MAX_HOST_OR_IP_CHARS, HOST_PATTERN, null, true);
44         this.regExpErrCode = ErrorConstants.ERR_STRING_ISNT_HOSTNAME_OR_IPADDRESS;
45     }
46
47     /**
48      * Static method which validates a host or IP.
49      *
50      * @param value
51      * @return boolean
52      */
53     public static boolean isValidAsHostOrIp(String JavaDoc value){
54         if (value.length() > MAX_HOST_OR_IP_CHARS)
55             return false;
56         else
57             return Pattern.compile(HOST_PATTERN).matcher(value).matches();
58     }
59
60 }
61
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