com.liferay.portal.kernel.util.StringComparator Maven / Gradle / Ivy
/**
* Copyright (c) 2000-present Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library 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 Lesser General Public License for more
* details.
*/
package com.liferay.portal.kernel.util;
import com.liferay.petra.string.StringPool;
import java.io.Serializable;
import java.util.Comparator;
/**
* @author Brian Wing Shun Chan
*/
public class StringComparator implements Comparator, Serializable {
public StringComparator() {
this(true, false);
}
public StringComparator(boolean ascending, boolean caseSensitive) {
_ascending = ascending;
_caseSensitive = caseSensitive;
}
@Override
public int compare(String s1, String s2) {
if (s1 == null) {
s1 = StringPool.BLANK;
}
if (s2 == null) {
s2 = StringPool.BLANK;
}
if (!_ascending) {
String temp = s1;
s1 = s2;
s2 = temp;
}
if (_caseSensitive) {
return s1.compareTo(s2);
}
return s1.compareToIgnoreCase(s2);
}
private final boolean _ascending;
private final boolean _caseSensitive;
}