com.liferay.portal.kernel.search.DocumentComparator.java Source code

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Here is the source code for com.liferay.portal.kernel.search.DocumentComparator.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.search;

import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;

/**
 * @author Brian Wing Shun Chan
 */
public class DocumentComparator implements Comparator<Document> {

    public DocumentComparator() {
        this(true, false);
    }

    public DocumentComparator(boolean ascending, boolean caseSensitive) {
        _ascending = ascending;
        _caseSensitive = caseSensitive;
    }

    public void addOrderBy(String name) {
        addOrderBy(name, _ascending, _caseSensitive);
    }

    public void addOrderBy(String name, boolean ascending) {
        addOrderBy(name, ascending, _caseSensitive);
    }

    public void addOrderBy(String name, boolean ascending, boolean caseSensitive) {

        DocumentComparatorOrderBy orderBy = new DocumentComparatorOrderBy(name, ascending, caseSensitive);

        _columns.add(orderBy);
    }

    @Override
    public int compare(Document doc1, Document doc2) {
        for (DocumentComparatorOrderBy orderBy : _columns) {
            String value1 = doc1.get(orderBy.getName());
            String value2 = doc2.get(orderBy.getName());

            if (!orderBy.isAsc()) {
                String temp = value1;

                value1 = value2;
                value2 = temp;
            }

            int result = 0;

            if ((value1 != null) && (value2 != null)) {
                if (orderBy.isCaseSensitive()) {
                    result = value1.compareTo(value2);
                } else {
                    result = value1.compareToIgnoreCase(value2);
                }
            }

            if (result != 0) {
                return result;
            }
        }

        return 0;
    }

    private final boolean _ascending;
    private final boolean _caseSensitive;
    private final List<DocumentComparatorOrderBy> _columns = new ArrayList<>();

}