/**
* 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 java.util.Comparator;
/**
* @author Brian Wing Shun Chan
*/
public class KeyValuePairComparator implements Comparator<KeyValuePair> {
public KeyValuePairComparator() {
this(true);
}
public KeyValuePairComparator(boolean ascending) {
this(true, ascending);
}
public KeyValuePairComparator(boolean byKey, boolean ascending) {
_byKey = byKey;
_ascending = ascending;
}
@Override
public int compare(KeyValuePair kvp1, KeyValuePair kvp2) {
if (_byKey) {
String key1 = kvp1.getKey();
String key2 = kvp2.getKey();
if (_ascending) {
return key1.compareTo(key2);
}
else {
return -(key1.compareTo(key2));
}
}
else {
String value1 = kvp1.getValue();
String value2 = kvp2.getValue();
if (_ascending) {
return value1.compareTo(value2);
}
else {
return -(value1.compareTo(value2));
}
}
}
private final boolean _ascending;
private final boolean _byKey;
}