|
What this is
Other links
The source code/* * Copyright 1999-2004 The Apache Software Foundation * * 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 org.apache.tomcat.util.http; import java.util.Enumeration; import java.util.Hashtable; import java.util.Locale; import java.util.StringTokenizer; import java.util.Vector; /** * Util to process the "Accept-Language" header. Used by facade to implement * getLocale() and by StaticInterceptor. * * Not optimized - it's very slow. * * @author James Duncan Davidson [duncan@eng.sun.com] * @author James Todd [gonzo@eng.sun.com] * @author Jason Hunter [jch@eng.sun.com] * @author Harish Prabandham * @author costin@eng.sun.com */ public class AcceptLanguage { public static Locale getLocale(String acceptLanguage) { if( acceptLanguage == null ) return Locale.getDefault(); Hashtable languages = new Hashtable(); Vector quality=new Vector(); processAcceptLanguage(acceptLanguage, languages,quality); if (languages.size() == 0) return Locale.getDefault(); Vector l = new Vector(); extractLocales( languages,quality, l); return (Locale)l.elementAt(0); } public static Enumeration getLocales(String acceptLanguage) { // Short circuit with an empty enumeration if null header if (acceptLanguage == null) { Vector v = new Vector(); v.addElement(Locale.getDefault()); return v.elements(); } Hashtable languages = new Hashtable(); Vector quality=new Vector(); processAcceptLanguage(acceptLanguage, languages , quality); if (languages.size() == 0) { Vector v = new Vector(); v.addElement(Locale.getDefault()); return v.elements(); } Vector l = new Vector(); extractLocales( languages, quality , l); return l.elements(); } private static void processAcceptLanguage( String acceptLanguage, Hashtable languages, Vector q) { StringTokenizer languageTokenizer = new StringTokenizer(acceptLanguage, ","); while (languageTokenizer.hasMoreTokens()) { String language = languageTokenizer.nextToken().trim(); int qValueIndex = language.indexOf(';'); int qIndex = language.indexOf('q'); int equalIndex = language.indexOf('='); Double qValue = new Double(1); if (qValueIndex > -1 && qValueIndex < qIndex && qIndex < equalIndex) { String qValueStr = language.substring(qValueIndex + 1); language = language.substring(0, qValueIndex); qValueStr = qValueStr.trim().toLowerCase(); qValueIndex = qValueStr.indexOf('='); qValue = new Double(0); if (qValueStr.startsWith("q") && qValueIndex > -1) { qValueStr = qValueStr.substring(qValueIndex + 1); try { qValue = new Double(qValueStr.trim()); } catch (NumberFormatException nfe) { } } } // XXX // may need to handle "*" at some point in time if (! language.equals("*")) { String key = qValue.toString(); Vector v; if (languages.containsKey(key)) { v = (Vector)languages.get(key) ; } else { v= new Vector(); q.addElement(qValue); } v.addElement(language); languages.put(key, v); } } } private static void extractLocales(Hashtable languages, Vector q,Vector l) { // XXX We will need to order by q value Vector in the Future ? Enumeration e = q.elements(); while (e.hasMoreElements()) { Vector v = (Vector)languages.get(((Double)e.nextElement()).toString()); Enumeration le = v.elements(); while (le.hasMoreElements()) { String language = (String)le.nextElement(); String country = ""; int countryIndex = language.indexOf("-"); if (countryIndex > -1) { country = language.substring(countryIndex + 1).trim(); language = language.substring(0, countryIndex).trim(); } l.addElement(new Locale(language, country)); } } } } |
... this post is sponsored by my books ... | |
![]() #1 New Release! |
![]() FP Best Seller |
Copyright 1998-2024 Alvin Alexander, alvinalexander.com
All Rights Reserved.
A percentage of advertising revenue from
pages under the /java/jwarehouse
URI on this website is
paid back to open source projects.