org.apache.myfaces.shared_tomahawk.util.LocaleUtils Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.myfaces.shared_tomahawk.util;
import java.util.Locale;
import java.util.StringTokenizer;
import java.util.logging.Level;
import java.util.logging.Logger;
/**
* @author Anton Koinov (latest modification by $Author: lu4242 $)
* @version $Revision: 1305679 $ $Date: 2012-03-26 23:42:04 +0000 (Mon, 26 Mar 2012) $
*/
public final class LocaleUtils
{
//private static final Log log = LogFactory.getLog(LocaleUtils.class);
private static final Logger log = Logger.getLogger(LocaleUtils.class.getName());
/** Utility class, do not instatiate */
private LocaleUtils()
{
// utility class, do not instantiate
}
/**
* Converts a locale string to Locale class. Accepts both
* '_' and '-' as separators for locale components.
*
* @param localeString string representation of a locale
* @return Locale instance, compatible with the string representation
*/
public static Locale toLocale(String localeString)
{
if ((localeString == null) || (localeString.length() == 0))
{
Locale locale = Locale.getDefault();
if(log.isLoggable(Level.WARNING))
{
log.warning("Locale name in faces-config.xml null or empty, setting locale to default locale : "
+ locale.toString());
}
return locale;
}
int separatorCountry = localeString.indexOf('_');
char separator;
if (separatorCountry >= 0)
{
separator = '_';
}
else
{
separatorCountry = localeString.indexOf('-');
separator = '-';
}
String language;
String country;
String variant;
if (separatorCountry < 0)
{
language = localeString;
country = "";
variant = "";
}
else
{
language = localeString.substring(0, separatorCountry);
int separatorVariant = localeString.indexOf(separator, separatorCountry + 1);
if (separatorVariant < 0)
{
country = localeString.substring(separatorCountry + 1);
variant = "";
}
else
{
country = localeString.substring(separatorCountry + 1, separatorVariant);
variant = localeString.substring(separatorVariant + 1);
}
}
return new Locale(language, country, variant);
}
/**
* Convert locale string used by converter tags to locale.
*
* @param name name of the locale
* @return locale specified by the given String
*
* @see org.apache.myfaces.taglib.core.ConvertDateTimeTag#setConverterLocale
* @see org.apache.myfaces.taglib.core.ConvertNumberTag#setConverterLocale
*/
public static Locale converterTagLocaleFromString(String name)
{
try
{
Locale locale;
StringTokenizer st = new StringTokenizer(name, "_");
String language = st.nextToken();
if(st.hasMoreTokens())
{
String country = st.nextToken();
if(st.hasMoreTokens())
{
String variant = st.nextToken();
locale = new Locale(language, country, variant);
}
else
{
locale = new Locale(language, country);
}
}
else
{
locale = new Locale(language);
}
return locale;
}
catch(Exception e)
{
throw new IllegalArgumentException("Locale parsing exception - " +
"invalid string representation '" + name + "'");
}
}
}