cdmlib-remote/src/main/java/eu/etaxonomy/cdm/remote/l10n/LocaleContext.java

   1 package eu.etaxonomy.cdm.remote.l10n;
   2
   3 import java.util.Enumeration;
   4 import java.util.Hashtable;
   5 import java.util.List;
   6 import java.util.Locale;
   7 import java.util.Vector;
   8
   9 import org.springframework.beans.factory.annotation.Autowired;
  10 import org.springframework.stereotype.Component;
  11
  12 import eu.etaxonomy.cdm.api.service.ITermService;
  13 import eu.etaxonomy.cdm.model.common.Language;
  14
  15 @Component
  16 public class LocaleContext {
  17
  18         protected static ThreadLocal<Vector<Locale>> localesHolder = new ThreadLocal<Vector<Locale>>(){
  19
  20                 @Override
  21                 protected Vector<Locale> initialValue() {
  22                         return new Vector<Locale>();
  23                 }
  24
  25         };
  26
  27         protected static Hashtable<String, List<Language>> languageMap = new Hashtable<String, List<Language>>();
  28
  29         private static ITermService termService;
  30
  31         @Autowired
  32         public void setTermService(ITermService termService) {
  33                 this.termService = termService;
  34         }
  35
  36         public static void setLocales(Enumeration<Locale> locales) {
  37                 Vector<Locale> l = new Vector<Locale>();
  38                 while(locales.hasMoreElements()){
  39                         l.add(locales.nextElement());
  40                 }
  41                 LocaleContext.localesHolder.set(l);
  42                 mapToLanguages(l);
  43         }
  44
  45         public static Enumeration<Locale> getLocales(){
  46                 return localesHolder.get().elements();
  47         }
  48
  49         /**
  50          *
  51          * @return
  52          */
  53         public static List<Language> getLanguages(){
  54                 String localesKey = composeLocalesKey(getLocales());
  55                 return languageMap.get(localesKey);
  56         }
  57
  58         private static void mapToLanguages(Vector<Locale> locales) {
  59
  60                 String localesKey = composeLocalesKey(locales.elements());
  61
  62                 if(!languageMap.containsKey(localesKey)){
  63                         List<Language> languages = termService.getLanguagesByLocale(locales.elements());
  64                         languageMap.put(localesKey, languages);
  65                 }
  66         }
  67
  68         private static String composeLocalesKey(Enumeration<Locale> locales) {
  69                 String localesKey = "";
  70                 while(locales.hasMoreElements()){
  71                         localesKey += locales.nextElement() + ",";
  72                 }
  73                 return localesKey;
  74         }
  75
  76
  77
  78 }