com.liferay.project.templates.extensions.util.Validator Maven / Gradle / Ivy
/**
* SPDX-FileCopyrightText: (c) 2000 Liferay, Inc. https://liferay.com
* SPDX-License-Identifier: LGPL-2.1-or-later OR LicenseRef-Liferay-DXP-EULA-2.0.0-2023-06
*/
package com.liferay.project.templates.extensions.util;
/**
* @author Brian Wing Shun Chan
*/
public class Validator {
public static boolean isNotNull(String s) {
return !isNull(s);
}
public static boolean isNull(String s) {
if (s == null) {
return true;
}
int counter = 0;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (Character.isWhitespace(c)) {
continue;
}
else if (counter > 3) {
return false;
}
if (counter == 0) {
if (c != 'n') {
return false;
}
}
else if (counter == 1) {
if (c != 'u') {
return false;
}
}
else if ((counter == 2) || (counter == 3)) {
if (c != 'l') {
return false;
}
}
counter++;
}
if ((counter == 0) || (counter == 4)) {
return true;
}
return false;
}
}