Initial revision

From-SVN: r26263

libjava/java/util/ResourceBundle.java

@@ -0,0 +1,188 @@
+/* Copyright (C) 1998, 1999  Cygnus Solutions
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package java.util;
+
+/**
+ * @author Anthony Green <green@cygnus.com>
+ * @date November 26, 1998.
+ */
+
+/* Written using "Java Class Libraries", 2nd edition, ISBN 0-201-31002-3,
+ * and "The Java Language Specification", ISBN 0-201-63451-1.  */
+
+public abstract class ResourceBundle
+{
+  protected ResourceBundle parent;
+
+  public ResourceBundle ()
+    {
+    }
+
+  public final String getString (String key) throws MissingResourceException
+    {
+      return (String) getObject(key);
+    }
+
+  public final String[] getStringArray (String key) 
+    throws MissingResourceException
+    {
+      return (String[]) getObject(key);
+    }
+
+  public final Object getObject(String key) throws MissingResourceException
+    {
+      Object result;
+
+      try 
+	{
+	  return handleGetObject (key);
+	}
+      catch (MissingResourceException ex)
+	{
+	  if (parent != null)
+	    return parent.getObject(key);
+	  else 
+	    throw ex;
+	}
+    }
+
+  public static final ResourceBundle getBundle(String baseName) 
+    throws MissingResourceException
+    {
+      return getBundle(baseName, Locale.getDefault());
+    }
+
+  // Start searching with the name bundleName.  Continue searching by
+  // stripping off the '_' delimited tails until the search name is
+  // the same as stopHere.
+  private static final ResourceBundle trySomeGetBundle (String bundleName,
+							String stopHere)
+    {
+      Class rbc;
+
+      while (true)
+	{
+	  try 
+	    {
+	      rbc = Class.forName(bundleName);
+	      try 
+		{
+		  return (ResourceBundle) rbc.newInstance();
+		}
+	      catch (IllegalAccessException ex)
+		{
+		  // Fall through
+		}
+	      catch (InstantiationException ex)
+		{
+		  // Fall through
+		}
+	      return null;
+	    }
+	  catch (ClassNotFoundException ex)
+	    {
+	      if (bundleName.compareTo(stopHere) == 0)
+		return null;
+	      else
+		{
+		  int last = bundleName.lastIndexOf('_');
+		  
+		  // No more underscores?
+		  if (last == -1)
+		    return null;
+		  
+		  // Loop around, testing this new shorter name.
+		  bundleName = bundleName.substring(0, last);
+		}
+	    }
+	}
+    }
+  
+  // Search for bundles, but stop at baseName_language.
+  private static final ResourceBundle partialGetBundle (String baseName,
+							Locale locale)
+    {
+      ResourceBundle rb;
+
+      String bundleName = (baseName 
+			   + "_" 
+			   + locale.getLanguage() + "_"
+			   + locale.getCountry() + "_"
+			   + locale.getVariant());
+
+      String stopHere = (baseName 
+			 + "_" 
+			 + locale.getLanguage());
+
+
+      rb = trySomeGetBundle(bundleName, stopHere);
+
+      return rb;
+    }
+
+  public static final ResourceBundle getBundle (String baseName, 
+						Locale locale)
+    throws MissingResourceException
+    {
+      ResourceBundle rb;
+      Class rbc;
+
+      // FIXME: We can't currently rely on NullPointerException being
+      // thrown when we invoke a method on a null object.
+      if (locale == null)
+	throw new NullPointerException ();
+
+      rb = partialGetBundle(baseName, locale);
+      if (rb != null)
+	return rb;
+
+      if (! locale.equals(Locale.getDefault()))
+	{
+	  rb = partialGetBundle(baseName, Locale.getDefault());
+	  if (rb != null)
+	    return rb;
+	}
+			   
+      // Try just the baseName.
+      try
+	{
+	  rbc = Class.forName (baseName);
+	  try 
+	    {
+	      return (ResourceBundle) rbc.newInstance();
+	    }
+	  catch (IllegalAccessException ex)
+	    {
+	      // Fall through.
+	    }
+	  catch (InstantiationException ex)
+	    {
+	      // Fall through.
+	    }
+	}
+      catch (ClassNotFoundException ex)
+	{
+	  // Fall through.
+	}
+
+      throw new MissingResourceException("can't load bundle", 
+					 baseName,
+					 "bundle");
+    }
+
+  protected void setParent(ResourceBundle parent)
+    {
+      this.parent = parent;
+    }
+
+  protected abstract Object handleGetObject(String key) 
+    throws MissingResourceException;
+
+  public abstract Enumeration getKeys();
+}