com.liferay.portal.kernel.util.StringComparator.java Source code

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Here is the source code for com.liferay.portal.kernel.util.StringComparator.java

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/**
 * 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<String>, 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;

}