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/* 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();
}
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