io.undertow.util.LocaleUtils Maven / Gradle / Ivy
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This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
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/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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 io.undertow.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Locale;
/**
* Utility methods for getting the locale from a request.
*
* @author Stuart Douglas
*/
public class LocaleUtils {
public static Locale getLocaleFromString(String localeString) {
if (localeString == null) {
return null;
}
return Locale.forLanguageTag(localeString);
}
/**
* Parse a header string and return the list of locales that were found.
*
* If the header is empty or null then an empty list will be returned.
*
* @param acceptLanguage The Accept-Language header
* @return The list of locales, in order of preference
*/
public static List getLocalesFromHeader(final String acceptLanguage) {
if(acceptLanguage == null) {
return Collections.emptyList();
}
return getLocalesFromHeader(Collections.singletonList(acceptLanguage));
}
/**
* Parse a header string and return the list of locales that were found.
*
* If the header is empty or null then an empty list will be returned.
*
* @param acceptLanguage The Accept-Language header
* @return The list of locales, in order of preference
*/
public static List getLocalesFromHeader(final List acceptLanguage) {
if (acceptLanguage == null || acceptLanguage.isEmpty()) {
return Collections.emptyList();
}
final List ret = new ArrayList<>();
final List> parsedResults = QValueParser.parse(acceptLanguage);
for (List qvalueResult : parsedResults) {
for (QValueParser.QValueResult res : qvalueResult) {
if (!res.isQValueZero()) {
Locale e = LocaleUtils.getLocaleFromString(res.getValue());
ret.add(e);
}
}
}
return ret;
}
}