com.liferay.portlet.documentlibrary.util.comparator.FileVersionVersionComparator.java Source code

Introduction

Here is the source code for com.liferay.portlet.documentlibrary.util.comparator.FileVersionVersionComparator.java

Source

/* ./liferay-liferay-portal-b66e4b4/portal-service/src/com/liferay/portlet/documentlibrary/util/comparator/FileVersionVersionComparator.java */
/**
 * 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.portlet.documentlibrary.util.comparator;

import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portlet.documentlibrary.model.DLFileEntryConstants;
import com.liferay.portlet.documentlibrary.model.DLFileVersion;

import java.util.Comparator;

/**
 * @author Bruno Farache
 */
public class FileVersionVersionComparator implements Comparator<DLFileVersion> {

    public FileVersionVersionComparator() {
        this(false);
    }

    public FileVersionVersionComparator(boolean ascending) {
        _ascending = ascending;
    }

    @Override
    public int compare(DLFileVersion dlFileVersion1, DLFileVersion dlFileVersion2) {

        int value = 0;

        String version1 = dlFileVersion1.getVersion();

        if (version1.equals(DLFileEntryConstants.PRIVATE_WORKING_COPY_VERSION)) {

            return -1;
        }

        String version2 = dlFileVersion2.getVersion();

        if (version2.equals(DLFileEntryConstants.PRIVATE_WORKING_COPY_VERSION)) {

            return 1;
        }

        int[] versionParts1 = StringUtil.split(version1, StringPool.PERIOD, 0);
        int[] versionParts2 = StringUtil.split(version2, StringPool.PERIOD, 0);

        if ((versionParts1.length != 2) && (versionParts2.length != 2)) {
            value = 0;
        } else if (versionParts1.length != 2) {
            value = -1;
        } else if (versionParts2.length != 2) {
            value = 1;
        } else if (versionParts1[0] > versionParts2[0]) {
            value = 1;
        } else if (versionParts1[0] < versionParts2[0]) {
            value = -1;
        } else if (versionParts1[1] > versionParts2[1]) {
            value = 1;
        } else if (versionParts1[1] < versionParts2[1]) {
            value = -1;
        }

        if (_ascending) {
            return value;
        } else {
            return -value;
        }
    }

    public boolean isAscending() {
        return _ascending;
    }

    private final boolean _ascending;

}