src/be/nikiroo/jvcard/resources/FixedResourceBundleControl.java

   1 package be.nikiroo.jvcard.resources;
   2
   3 import java.io.File;
   4 import java.io.FileInputStream;
   5 import java.io.IOException;
   6 import java.io.InputStream;
   7 import java.io.InputStreamReader;
   8 import java.net.URL;
   9 import java.net.URLConnection;
  10 import java.util.Locale;
  11 import java.util.PropertyResourceBundle;
  12 import java.util.ResourceBundle;
  13 import java.util.ResourceBundle.Control;
  14
  15 /**
  16  * Fixed ResourceBundle.Control class. It will use UTF-8 for the files to load.
  17  *
  18  * Also support an option to first check into the given path before looking into
  19  * the resources.
  20  *
  21  * @author niki
  22  *
  23  */
  24 class FixedResourceBundleControl extends Control {
  25         private String outsideWorld = null;
  26
  27         /**
  28          * Create a new {@link FixedResourceBundleControl}.
  29          *
  30          * @param outsideWorld
  31          *            NULL if you are only interested into the resources, a path to
  32          *            first check into it before looking at the actual resources
  33          */
  34         public FixedResourceBundleControl(String outsideWorld) {
  35                 this.outsideWorld = outsideWorld;
  36         }
  37
  38         @Override
  39         public ResourceBundle newBundle(String baseName, Locale locale,
  40                         String format, ClassLoader loader, boolean reload)
  41                         throws IllegalAccessException, InstantiationException, IOException {
  42                 // The below is a copy of the default implementation.
  43                 String bundleName = toBundleName(baseName, locale);
  44                 String resourceName = toResourceName(bundleName, "properties");
  45
  46                 ResourceBundle bundle = null;
  47                 InputStream stream = null;
  48                 if (reload) {
  49                         URL url = loader.getResource(resourceName);
  50                         if (url != null) {
  51                                 URLConnection connection = url.openConnection();
  52                                 if (connection != null) {
  53                                         connection.setUseCaches(false);
  54                                         stream = connection.getInputStream();
  55                                 }
  56                         }
  57                 } else {
  58                         // New code to support outside resources:
  59                         if (outsideWorld != null) {
  60                                 String pkg = this.getClass().getPackage().getName();
  61                                 pkg = pkg.replaceAll("\\.", File.separator) + File.separator;
  62
  63                                 if (resourceName.startsWith(pkg)) {
  64                                         try {
  65                                                 String file = outsideWorld + File.separator
  66                                                                 + resourceName.substring(pkg.length());
  67                                                 stream = new FileInputStream(file);
  68                                         } catch (Exception e) {
  69                                                 // file not in priority directory,
  70                                                 // fallback to default resource
  71                                         }
  72                                 }
  73                         }
  74
  75                         if (stream == null)
  76                                 stream = loader.getResourceAsStream(resourceName);
  77                         //
  78                 }
  79                 if (stream != null) {
  80                         try {
  81                                 // This line is changed to make it to read properties files
  82                                 // as UTF-8.
  83                                 // How can someone use an archaic encoding such as ISO 8859-1 by
  84                                 // *DEFAULT* is beyond me...
  85                                 bundle = new PropertyResourceBundle(new InputStreamReader(
  86                                                 stream, "UTF-8"));
  87                         } finally {
  88                                 stream.close();
  89                         }
  90                 }
  91                 return bundle;
  92         }
  93 }