/*
* NOTE: This copyright does *not* cover user programs that use HQ
* program services by normal system calls through the application
* program interfaces provided as part of the Hyperic Plug-in Development
* Kit or the Hyperic Client Development Kit - this is merely considered
* normal use of the program, and does *not* fall under the heading of
* "derived work".
*
* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
* This file is part of HQ.
*
* HQ is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. This program is distributed
* in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
* even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
package org.hyperic.util.validator;
import org.hyperic.util.DNS_TLD;
public class DomainValidation {
public static boolean isValidDomainName (String domain) {
boolean onDot = true;
for (int i=0; i<domain.length(); i++) {
char c = domain.charAt(i);
if (c == '.') {
// no double dots or starting/ending with dot
if (onDot
|| i == 0
|| i == domain.length() - 1) return false;
onDot = true;
continue;
}
onDot = false;
if (Character.isLetterOrDigit(c)) continue;
if (c == '-') {
// no starting or ending with hyphen
if (i == 0 || i == domain.length() - 1) return false;
else continue;
}
return false;
}
int lastDotIndex = domain.lastIndexOf('.');
if (lastDotIndex == -1) return false;
// Get text after the last dot
String suffix = domain.substring(lastDotIndex + 1);
// Make sure suffix is one of the TLDs
if (!DNS_TLD.isTLD(suffix)) return false;
return true;
}
}