org.mycore.datamodel.language.MCRLanguageXML.java Source code

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Here is the source code for org.mycore.datamodel.language.MCRLanguageXML.java

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/*
 * $Revision$ $Date$
 *
 * This file is part of ***  M y C o R e  ***
 * See http://www.mycore.de/ for details.
 *
 * This program is free software; you can use it, redistribute it
 * and / or modify it under the terms of the GNU General Public License
 * (GPL) as published by the Free Software Foundation; either version 2
 * of the License or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program, in a file called gpl.txt or license.txt.
 * If not, write to the Free Software Foundation Inc.,
 * 59 Temple Place - Suite 330, Boston, MA  02111-1307 USA
 */

package org.mycore.datamodel.language;

import org.jdom2.Element;
import org.jdom2.Namespace;

/**
 * Helper class to map xml:lang and lang attributes in XML to MCRLanguage 
 * 
 * @author Frank L\u00FCtzenkirchen
 */
public class MCRLanguageXML {

    /**
     * Sets the lang attribute to the ISO 639-2 bibliographic code of the given language 
     */
    public static void setLangAttribute(MCRLanguage lang, Element element) {
        String code = lang.getCode(MCRLanguageCodeType.biblCode);
        if (code != null)
            element.setAttribute("lang", code);
    }

    /**
     * Sets the xml:lang attribute to the ISO 639-1 code of the given language 
     */
    public static void setXMLLangAttribute(MCRLanguage lang, Element element) {
        element.setAttribute("lang", lang.getCode(MCRLanguageCodeType.xmlCode), Namespace.XML_NAMESPACE);
    }

    /**
     * Returns the language of the given XML element, by inspecting the xml:lang or lang attribute.
     * If neither exists, the default language is returned. 
     */
    public static MCRLanguage getLanguage(Element element) {
        String code = element.getAttributeValue("lang", Namespace.XML_NAMESPACE);
        if ((code == null) || code.isEmpty())
            code = element.getAttributeValue("lang");

        if ((code == null) || code.isEmpty())
            return MCRLanguageFactory.instance().getDefaultLanguage();
        else
            return MCRLanguageFactory.instance().getLanguage(code);

    }
}