1 files changed, 151 insertions, 0 deletions
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
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--- /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<String,Vector<String>> languages =
+            new Hashtable<String,Vector<String>>();
+        Vector<Double> quality = new Vector<Double>();
+        processAcceptLanguage(acceptLanguage, languages, quality);
+
+        if (languages.size() == 0) return Locale.getDefault();
+
+        Vector<Locale> l = new Vector<Locale>();
+        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<Locale> v = new Vector<Locale>();
+            v.addElement(Locale.getDefault());
+            return v.elements();
+        }
+        
+        Hashtable<String,Vector<String>> languages =
+            new Hashtable<String,Vector<String>>();
+        Vector<Double> quality=new Vector<Double>();
+            processAcceptLanguage(acceptLanguage, languages , quality);
+
+        if (languages.size() == 0) {
+            Vector<Locale> v = new Vector<Locale>();
+            v.addElement(Locale.getDefault());
+            return v.elements();
+        }
+            Vector<Locale> l = new Vector<Locale>();
+            extractLocales( languages, quality , l);
+            return l.elements();
+    }
+
+    private static void processAcceptLanguage( String acceptLanguage,
+            Hashtable<String,Vector<String>> languages, Vector<Double> 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<String> v;
+                if (languages.containsKey(key)) {
+                    v = languages.get(key) ;
+                } else {
+                    v= new Vector<String>();
+                    q.addElement(qValue);
+                }
+                v.addElement(language);
+                languages.put(key, v);
+            }
+        }
+    }
+
+    private static void extractLocales(Hashtable languages, Vector q,
+            Vector<Locale> 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));
+            }
+        }
+    }
+
+
+}