org.betaconceptframework.astroboa.commons.comparator.TopicLocalizedLabelComparator.java Source code

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Here is the source code for org.betaconceptframework.astroboa.commons.comparator.TopicLocalizedLabelComparator.java

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/*
 * Copyright (C) 2005-2012 BetaCONCEPT Limited
 *
 * This file is part of Astroboa.
 *
 * Astroboa 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 3 of the License, or
 * (at your option) any later version.
 *
 * Astroboa 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.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with Astroboa.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.betaconceptframework.astroboa.commons.comparator;

import java.io.Serializable;
import java.util.Comparator;
import java.util.Locale;

import org.apache.commons.lang.StringUtils;
import org.betaconceptframework.astroboa.api.model.Topic;
import org.betaconceptframework.astroboa.util.CmsUtils;

/**
 * @author Gregory Chomatas (gchomatas@betaconcept.com)
 * @author Savvas Triantafyllou (striantafyllou@betaconcept.com)
 * 
 */
public class TopicLocalizedLabelComparator implements Comparator<Topic>, Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = -7774647142944190896L;
    private String locale;

    public void setLocale(String locale) {
        if (StringUtils.isBlank(locale))
            this.locale = Locale.ENGLISH.toString();
        else
            this.locale = locale;
    }

    public TopicLocalizedLabelComparator(String locale) {
        this.locale = locale;
    }

    public int compare(Topic topic1, Topic topic2) {
        if (locale == null)
            setLocale(null);

        if (topic1 == null)
            return -1;

        if (topic2 == null)
            return 1;

        return compareLocalizedNames(retrieveLabelForLocale(topic1), retrieveLabelForLocale(topic2));

    }

    private String retrieveLabelForLocale(Topic topic) {
        String localizedLabelForLocale = topic.getLocalizedLabelForLocale(locale);

        if (localizedLabelForLocale == null && locale != null && !Locale.ENGLISH.toString().equals(locale)) {
            localizedLabelForLocale = topic.getLocalizedLabelForLocale(Locale.ENGLISH.toString());
        }

        return localizedLabelForLocale;
    }

    private int compareLocalizedNames(String localizedLabel0, String localizedLabel1) {

        if (localizedLabel0 == null && localizedLabel1 == null)
            return 0;

        if (localizedLabel0 != null && localizedLabel1 == null)
            return 1;

        if (localizedLabel0 == null && localizedLabel1 != null)
            return -1;

        //We need ascending order
        if ("el".equalsIgnoreCase(locale)) {
            //Filter string to lower case and transforming accented characters to simple ones
            String lowerCaseGreekFilteredLocalizedLabel0 = CmsUtils.filterGreekCharacters(localizedLabel0);
            String lowerCaseGreekFilteredLocalizedLabel1 = CmsUtils.filterGreekCharacters(localizedLabel1);

            return lowerCaseGreekFilteredLocalizedLabel0.compareTo(lowerCaseGreekFilteredLocalizedLabel1);
        } else
            return localizedLabel0.compareTo(localizedLabel1);
    }
}