org.jboss.jdocbook.util.LocaleUtils Maven / Gradle / Ivy

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/*
 * jDocBook, processing of DocBook sources as a Maven plugin
 *
 * Copyright (c) 2009, Red Hat Middleware LLC or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Middleware LLC.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * 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 Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package org.jboss.jdocbook.util;

import java.util.Comparator;
import java.util.Locale;
import java.util.StringTokenizer;

/**
 * Collection of utlities for dealing with {@link Locale locales}.
 *
 * @author Steve Ebersole
 */
public class LocaleUtils {

	public static final LocaleComparator LOCALE_COMPARATOR_INST = new LocaleComparator();

	public static class LocaleComparator implements Comparator {
		public int compare(Object o1, Object o2) {
			return render( ( Locale ) o1, '-' ).compareTo( render( ( Locale ) o2, '-' ) );
		}
	}

	public static Locale parse(String locale) {
		return parse( locale, '-' );
	}

	public static Locale parse(String locale, char sep) {
		StringTokenizer tokens = new StringTokenizer( locale, "" + sep );
		int tokencount = tokens.countTokens();
		switch ( tokencount ) {
			case 3 :
				return new Locale( tokens.nextToken(), tokens.nextToken(), tokens.nextToken() );
			case 2 :
				return new Locale( tokens.nextToken(), tokens.nextToken() );
			case 1 :
				return new Locale( tokens.nextToken() );
			default:
				return new Locale( "tbd" );
		}
	}

	public static String render(Locale locale, char sep) {
        boolean l = locale.getLanguage().length() != 0;
        boolean c = locale.getCountry().length() != 0;
        boolean v = locale.getVariant().length() != 0;
        StringBuffer result = new StringBuffer( locale.getLanguage() );
        if (c||(l&&v)) {
            result.append( sep ).append( locale.getCountry() );
        }
        if (v&&(l||c)) {
            result.append( sep ).append( locale.getVariant() );
        }
        return result.toString();
	}
}