From 32d17447a258188b2d534bcb0bf65a659ba7b7d0 Mon Sep 17 00:00:00 2001 From: mcentner Date: Fri, 29 Aug 2008 12:11:34 +0000 Subject: Initial import. git-svn-id: https://joinup.ec.europa.eu/svn/mocca/trunk@1 8a26b1a7-26f0-462f-b9ef-d0e30c41f5a4 --- .../apache/tomcat/util/http/AcceptLanguage.java | 151 +++++++++++++++++++++ 1 file changed, 151 insertions(+) create mode 100644 utils/src/main/java/at/gv/egiz/org/apache/tomcat/util/http/AcceptLanguage.java (limited to 'utils/src/main/java/at/gv/egiz/org/apache/tomcat/util/http/AcceptLanguage.java') diff --git a/utils/src/main/java/at/gv/egiz/org/apache/tomcat/util/http/AcceptLanguage.java b/utils/src/main/java/at/gv/egiz/org/apache/tomcat/util/http/AcceptLanguage.java new file mode 100644 index 00000000..231966ac --- /dev/null +++ b/utils/src/main/java/at/gv/egiz/org/apache/tomcat/util/http/AcceptLanguage.java @@ -0,0 +1,151 @@ +/* + * 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 at.gv.egiz.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 = 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)); + } + } + } + + +} -- cgit v1.2.3