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/*******************************************************************************
* Copyright (c) 2011, 2012 Wind River Systems, Inc. and others. All rights reserved.
* This program and the accompanying materials are made available under the terms
* of the Eclipse Public License v1.0 which accompanies this distribution, and is
* available at http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Wind River Systems - initial API and implementation
*******************************************************************************/
package org.eclipse.tcf.te.ui.controls.validator;
/**
* Netmask validator.
*/
public class NetMaskValidator extends NameOrIPValidator {
/**
* Constructor.
*
* @param attributes Attributes for the validator.
*/
public NetMaskValidator(int attributes) {
super(ATTR_IP);
if (isAttribute(ATTR_MANDATORY, attributes)) {
addAttribute(ATTR_MANDATORY);
}
}
/* (non-Javadoc)
* @see org.eclipse.tcf.te.ui.controls.validator.NameOrIPValidator#isValid(java.lang.String)
*/
@Override
public boolean isValid(String netMask) {
if (super.isValid(netMask)) {
// check the netmask
String[] bytes = netMask.split("\\."); //$NON-NLS-1$
int oldByte = 255;
int actByte;
for (int i=0; i<bytes.length; i++) {
actByte = Integer.parseInt(bytes[i]);
if ((oldByte < 255 && actByte > 0) ||
(oldByte == 255 && !isValidNetMaskByte(actByte))) {
return false;
}
oldByte = actByte;
}
return true;
}
return false;
}
/**
* Check one byte of a netmask if valid.
* A valid netmask byte should match the regular expression 1*0* and
* so can only be a value in the set {0,128,192,224,240,248,252,254,255}.
*/
private boolean isValidNetMaskByte(int netMaskByte) {
switch (netMaskByte) {
case 0:
case 128:
case 192:
case 224:
case 240:
case 248:
case 252:
case 254:
case 255:
return true;
default:
return false;
}
}
}
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