jars/icu4j-4_4_2-src/main/classes/core/src/com/ibm/icu/impl/ResourceBundleWrapper.java

   1 /*\r
   2 ******************************************************************************\r
   3 * Copyright (C) 2004-2010, International Business Machines Corporation and   *\r
   4 * others. All Rights Reserved.                                               *\r
   5 ******************************************************************************\r
   6 */\r
   7 \r
   8 package com.ibm.icu.impl;\r
   9 \r
  10 import java.io.InputStream;\r
  11 import java.util.Enumeration;\r
  12 import java.util.MissingResourceException;\r
  13 import java.util.PropertyResourceBundle;\r
  14 import java.util.ResourceBundle;\r
  15 import java.util.Vector;\r
  16 \r
  17 import com.ibm.icu.util.ULocale;\r
  18 import com.ibm.icu.util.UResourceBundle;\r
  19 \r
  20 /**\r
  21  * just a wrapper for Java ListResourceBundles and \r
  22  * @author ram\r
  23  *\r
  24  */\r
  25 public class ResourceBundleWrapper extends UResourceBundle {\r
  26     private ResourceBundle bundle = null;\r
  27     private String localeID = null;\r
  28     private String baseName = null;\r
  29     private Vector<String> keys = null;\r
  30 //    private int loadingStatus = -1;    \r
  31     \r
  32     private ResourceBundleWrapper(ResourceBundle bundle){\r
  33         this.bundle=bundle;\r
  34     }\r
  35 \r
  36     protected void setLoadingStatus(int newStatus){\r
  37 //        loadingStatus = newStatus;\r
  38     }\r
  39     \r
  40     protected Object handleGetObject(String aKey){\r
  41         ResourceBundleWrapper current = this;\r
  42         Object obj = null;\r
  43         while(current!=null){\r
  44             try{\r
  45                 obj = current.bundle.getObject(aKey);\r
  46                 break;\r
  47             }catch(MissingResourceException ex){\r
  48                 current = (ResourceBundleWrapper)current.getParent();\r
  49             }\r
  50         }\r
  51         if (obj == null){\r
  52             throw new MissingResourceException("Can't find resource for bundle "\r
  53                                                +baseName\r
  54                                                +", key "+aKey,\r
  55                                                this.getClass().getName(),\r
  56                                                aKey);\r
  57         }\r
  58         return obj;\r
  59     }\r
  60     \r
  61     public Enumeration<String> getKeys(){\r
  62         return keys.elements();\r
  63     }\r
  64     \r
  65     private void initKeysVector(){\r
  66         ResourceBundleWrapper current = this;\r
  67         keys = new Vector<String>();\r
  68         while(current!=null){\r
  69             Enumeration<String> e = current.bundle.getKeys();\r
  70             while(e.hasMoreElements()){\r
  71                 String elem = e.nextElement();\r
  72                 if(!keys.contains(elem)){\r
  73                     keys.add(elem);\r
  74                 }\r
  75             }\r
  76             current = (ResourceBundleWrapper)current.getParent();\r
  77         }\r
  78     }\r
  79     protected String getLocaleID(){\r
  80         return localeID;   \r
  81     }\r
  82  \r
  83     protected String getBaseName(){\r
  84         return bundle.getClass().getName().replace('.','/');   \r
  85     }\r
  86     \r
  87     public ULocale getULocale(){\r
  88         return new ULocale(localeID);   \r
  89     }\r
  90     \r
  91     public UResourceBundle getParent(){\r
  92         return (UResourceBundle)parent;   \r
  93     }\r
  94 \r
  95     // Flag for enabling/disabling debugging code\r
  96     private static final boolean DEBUG = ICUDebug.enabled("resourceBundleWrapper");\r
  97     \r
  98     // This method is for super class's instantiateBundle method\r
  99     public static UResourceBundle getBundleInstance(String baseName, String localeID, \r
 100                                                     ClassLoader root, boolean disableFallback){\r
 101         UResourceBundle b = instantiateBundle(baseName, localeID, root, disableFallback);\r
 102         if(b==null){\r
 103             String separator ="_";\r
 104             if(baseName.indexOf('/')>=0){\r
 105                 separator = "/";\r
 106             }\r
 107             throw new MissingResourceException("Could not find the bundle "+ baseName+separator+ localeID,"","");\r
 108         }\r
 109         return b;\r
 110     }\r
 111     // recursively build bundle and override the super-class method\r
 112      protected static synchronized UResourceBundle instantiateBundle(String baseName, String localeID,\r
 113                                                                     ClassLoader root, boolean disableFallback) {\r
 114         if (root == null) {\r
 115             root = Utility.getFallbackClassLoader();\r
 116         }\r
 117         final ClassLoader cl = root;\r
 118         String name = baseName;\r
 119         ULocale defaultLocale = ULocale.getDefault();\r
 120         if (localeID.length() != 0) {\r
 121             name = name + "_" + localeID;\r
 122         }\r
 123 \r
 124         ResourceBundleWrapper b = (ResourceBundleWrapper)loadFromCache(cl, name, defaultLocale);\r
 125         if(b==null){\r
 126             ResourceBundleWrapper parent = null;\r
 127             int i = localeID.lastIndexOf('_');\r
 128     \r
 129             boolean loadFromProperties = false;\r
 130             if (i != -1) {\r
 131                 String locName = localeID.substring(0, i);\r
 132                 parent = (ResourceBundleWrapper)loadFromCache(cl, baseName+"_"+locName,defaultLocale);\r
 133                 if(parent == null){\r
 134                     parent = (ResourceBundleWrapper)instantiateBundle(baseName, locName , cl, disableFallback);\r
 135                 }\r
 136             }else if(localeID.length()>0){\r
 137                 parent = (ResourceBundleWrapper)loadFromCache(cl, baseName,defaultLocale);\r
 138                 if(parent==null){\r
 139                     parent = (ResourceBundleWrapper)instantiateBundle(baseName, "", cl, disableFallback);\r
 140                 }\r
 141             }\r
 142             try {\r
 143                 Class<? extends ResourceBundle> cls = cl.loadClass(name).asSubclass(ResourceBundle.class);\r
 144                 ResourceBundle bx = cls.newInstance();\r
 145                 b = new ResourceBundleWrapper(bx);\r
 146                 if (parent != null) {\r
 147                     b.setParent(parent);\r
 148                 }\r
 149                 b.baseName=baseName;\r
 150                 b.localeID = localeID;            \r
 151     \r
 152             } catch (ClassNotFoundException e) {\r
 153                 loadFromProperties = true;\r
 154             } catch (NoClassDefFoundError e) {\r
 155                 loadFromProperties = true;\r
 156             } catch (Exception e) {\r
 157                 if (DEBUG)\r
 158                     System.out.println("failure");\r
 159                 if (DEBUG)\r
 160                     System.out.println(e);\r
 161             }\r
 162 \r
 163             if (loadFromProperties) {\r
 164                 try {\r
 165                     final String resName = name.replace('.', '/') + ".properties";\r
 166                     InputStream stream = java.security.AccessController.doPrivileged(\r
 167                         new java.security.PrivilegedAction<InputStream>() {\r
 168                             public InputStream run() {\r
 169                                 if (cl != null) {\r
 170                                     return cl.getResourceAsStream(resName);\r
 171                                 } else {\r
 172                                     return ClassLoader.getSystemResourceAsStream(resName);\r
 173                                 }\r
 174                             }\r
 175                         }\r
 176                     );\r
 177                     if (stream != null) {\r
 178                         // make sure it is buffered\r
 179                         stream = new java.io.BufferedInputStream(stream);\r
 180                         try {\r
 181                             b = new ResourceBundleWrapper(new PropertyResourceBundle(stream));\r
 182                             if (parent != null) {\r
 183                                 b.setParent(parent);\r
 184                             }\r
 185                             b.baseName=baseName;\r
 186                             b.localeID=localeID;\r
 187                         } catch (Exception ex) {\r
 188                             // throw away exception\r
 189                         } finally {\r
 190                             try {\r
 191                                 stream.close();\r
 192                             } catch (Exception ex) {\r
 193                                 // throw away exception\r
 194                             }\r
 195                         }\r
 196                     }\r
 197         \r
 198                     // if a bogus locale is passed then the parent should be\r
 199                     // the default locale not the root locale!\r
 200                     if (b==null) {\r
 201                         String defaultName = defaultLocale.toString();\r
 202                         if (localeID.length()>0 && localeID.indexOf('_')< 0 && defaultName.indexOf(localeID) == -1) {\r
 203                             b = (ResourceBundleWrapper)loadFromCache(cl,baseName+"_"+defaultName, defaultLocale);\r
 204                             if(b==null){\r
 205                                 b = (ResourceBundleWrapper)instantiateBundle(baseName , defaultName, cl, disableFallback);\r
 206                             }\r
 207                         }\r
 208                     }\r
 209                     // if still could not find the bundle then return the parent\r
 210                     if(b==null){\r
 211                         b=parent;\r
 212                     }                \r
 213                 } catch (Exception e) {\r
 214                     if (DEBUG)\r
 215                         System.out.println("failure");\r
 216                     if (DEBUG)\r
 217                         System.out.println(e);\r
 218                 }\r
 219             }\r
 220             b = (ResourceBundleWrapper)addToCache(cl, name, defaultLocale, b);\r
 221         }\r
 222 \r
 223         if(b!=null){\r
 224             b.initKeysVector();\r
 225         }else{\r
 226             if(DEBUG)System.out.println("Returning null for "+baseName+"_"+localeID);\r
 227         }\r
 228         \r
 229         return b;\r
 230     }\r
 231 }\r