jars/icu4j-4_2_1-src/src/com/ibm/icu/impl/ResourceBundleWrapper.java

   1 /*\r
   2 ******************************************************************************\r
   3 * Copyright (C) 2004-2008, 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 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 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();\r
  68         while(current!=null){\r
  69             Enumeration e = current.bundle.getKeys();\r
  70             while(e.hasMoreElements()){\r
  71                 String elem = (String)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             // we're on the bootstrap\r
 116             root = ClassLoader.getSystemClassLoader();\r
 117         }\r
 118         final ClassLoader cl = root;\r
 119         String name = baseName;\r
 120         ULocale defaultLocale = ULocale.getDefault();\r
 121         if (localeID.length() != 0) {\r
 122             name = name + "_" + localeID;\r
 123         }\r
 124 \r
 125         ResourceBundleWrapper b = (ResourceBundleWrapper)loadFromCache(cl, name, defaultLocale);\r
 126         if(b==null){\r
 127             ResourceBundleWrapper parent = null;\r
 128             int i = localeID.lastIndexOf('_');\r
 129     \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 cls = cl.loadClass(name);\r
 144                 ResourceBundle bx = (ResourceBundle) 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                 \r
 154                 final String resName = name.replace('.', '/') + ".properties";\r
 155                 InputStream stream = (InputStream)java.security.AccessController.doPrivileged(\r
 156                     new java.security.PrivilegedAction() {\r
 157                         public Object run() {\r
 158                             if (cl != null) {\r
 159                                 return cl.getResourceAsStream(resName);\r
 160                             } else {\r
 161                                 return ClassLoader.getSystemResourceAsStream(resName);\r
 162                             }\r
 163                         }\r
 164                     }\r
 165                 );\r
 166                 if (stream != null) {\r
 167                     // make sure it is buffered\r
 168                     stream = new java.io.BufferedInputStream(stream);\r
 169                     try {\r
 170                         b = new ResourceBundleWrapper(new PropertyResourceBundle(stream));\r
 171                         if (parent != null) {\r
 172                             b.setParent(parent);\r
 173                         }\r
 174                         b.baseName=baseName;\r
 175                         b.localeID=localeID;\r
 176                     } catch (Exception ex) {\r
 177                         // throw away exception\r
 178                     } finally {\r
 179                         try {\r
 180                             stream.close();\r
 181                         } catch (Exception ex) {\r
 182                             // throw away exception\r
 183                         }\r
 184                     }\r
 185                 }\r
 186     \r
 187                 // if a bogus locale is passed then the parent should be\r
 188                 // the default locale not the root locale!\r
 189                 if (b==null) {\r
 190                     String defaultName = defaultLocale.toString();\r
 191                     if (localeID.length()>0 && localeID.indexOf('_')< 0 && defaultName.indexOf(localeID) == -1) {\r
 192                         b = (ResourceBundleWrapper)loadFromCache(cl,baseName+"_"+defaultName, defaultLocale);\r
 193                         if(b==null){\r
 194                             b = (ResourceBundleWrapper)instantiateBundle(baseName , defaultName, cl, disableFallback);\r
 195                         }\r
 196                     }\r
 197                 }\r
 198                 // if still could not find the bundle then return the parent\r
 199                 if(b==null){\r
 200                     b=parent;\r
 201                 }\r
 202             } catch (Exception e) {\r
 203                 if (DEBUG)\r
 204                     System.out.println("failure");\r
 205                 if (DEBUG)\r
 206                     System.out.println(e);\r
 207             }\r
 208 \r
 209             addToCache(cl, name, defaultLocale, b);\r
 210         }\r
 211         if(b!=null){\r
 212             b.initKeysVector();\r
 213         }else{\r
 214             if(DEBUG)System.out.println("Returning null for "+baseName+"_"+localeID);\r
 215         }\r
 216         \r
 217         return b;\r
 218     }\r
 219 }\r