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ResourceBundle.java (bundleCache): Renamed from resourceBundleCache.

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2004-07-09  Bryce McKinlay  <mckinlay@redhat.com>

	* java/util/ResourceBundle.java (bundleCache): Renamed from
	resourceBundleCache. Update comments.
	(getObject): Don't catch MissingResourceException.
	(getBundle(String)): Remove 'final'. Use system classloader if
	getCallingClassLoader returned null.
	(getBundle(String, Locale)): Likewise.
	(BundleKey): New private class. HashMap key for bundle cache lookup.
	(lookupKey): New. Singleton instance of BundleKey.
	(nullEntry): New. Cache entry to represent failed lookups.
	(getBundle(String, Locale, ClassLoader)): Re-written to use new
	caching strategy, no-allocation lookup, and new tryBundle methods.
	(tryBundle(String, ClassLoader)): New. Load a locale-qualified
	bundle name using given classloader.
	(tryBundle(String, Locale, ClassLoader, boolean): New. Qualify
	baseName for given Locale and attempt to load bundle.

From-SVN: r84434
This commit is contained in:
Bryce McKinlay 2004-07-10 02:14:30 +00:00 committed by Bryce McKinlay
parent 17a916d4e6
commit 21f56031ca
2 changed files with 203 additions and 168 deletions
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18
libjava/ChangeLog
View File

@ -1,3 +1,21 @@
2004-07-09 Bryce McKinlay <mckinlay@redhat.com>
* java/util/ResourceBundle.java (bundleCache): Renamed from
resourceBundleCache. Update comments.
(getObject): Don't catch MissingResourceException.
(getBundle(String)): Remove 'final'. Use system classloader if
getCallingClassLoader returned null.
(getBundle(String, Locale)): Likewise.
(BundleKey): New private class. HashMap key for bundle cache lookup.
(lookupKey): New. Singleton instance of BundleKey.
(nullEntry): New. Cache entry to represent failed lookups.
(getBundle(String, Locale, ClassLoader)): Re-written to use new
caching strategy, no-allocation lookup, and new tryBundle methods.
(tryBundle(String, ClassLoader)): New. Load a locale-qualified bundle
name using given classloader.
(tryBundle(String, Locale, ClassLoader, boolean): New. Qualify
baseName for given Locale and attempt to load bundle.
2004-07-09 Bryce McKinlay <mckinlay@redhat.com>
* javax/swing/plaf/basic/BasicMenuUI.java (mousePressed): Remove

353
libjava/java/util/ResourceBundle.java
View File

@ -105,12 +105,9 @@ public abstract class ResourceBundle
private static native ClassLoader getCallingClassLoader();
/**
* The resource bundle cache. This is a two-level hash map: The key
* is the class loader, the value is a new HashMap. The key of this
* second hash map is the localized name, the value is a soft
* references to the resource bundle.
* The resource bundle cache.
*/
private static Map resourceBundleCache;
private static Map bundleCache;
/**
* The last default Locale we saw. If this ever changes then we have to
@ -172,15 +169,11 @@ public abstract class ResourceBundle
public final Object getObject(String key)
{
for (ResourceBundle bundle = this; bundle != null; bundle = bundle.parent)
try
{
Object o = bundle.handleGetObject(key);
if (o != null)
return o;
}
catch (MissingResourceException ex)
{
}
{
Object o = bundle.handleGetObject(key);
if (o != null)
return o;
}
throw new MissingResourceException("Key not found", getClass().getName(),
key);
@ -220,10 +213,12 @@ public abstract class ResourceBundle
* @throws MissingResourceException if the resource bundle can't be found
* @throws NullPointerException if baseName is null
*/
public static final ResourceBundle getBundle(String baseName)
public static ResourceBundle getBundle(String baseName)
{
return getBundle(baseName, Locale.getDefault(),
getCallingClassLoader());
ClassLoader cl = getCallingClassLoader();
if (cl == null)
cl = ClassLoader.getSystemClassLoader();
return getBundle(baseName, Locale.getDefault(), cl);
}
/**
@ -238,12 +233,75 @@ public abstract class ResourceBundle
* @throws MissingResourceException if the resource bundle can't be found
* @throws NullPointerException if baseName or locale is null
*/
public static final ResourceBundle getBundle(String baseName,
Locale locale)
public static ResourceBundle getBundle(String baseName, Locale locale)
{
return getBundle(baseName, locale, getCallingClassLoader());
ClassLoader cl = getCallingClassLoader();
if (cl == null)
cl = ClassLoader.getSystemClassLoader();
return getBundle(baseName, locale, cl);
}
/** Cache key for the ResourceBundle cache. Resource bundles are keyed
by the combination of bundle name, locale, and class loader. */
private static class BundleKey implements Cloneable
{
String baseName;
Locale locale;
ClassLoader classLoader;
int hashcode;
BundleKey() {}
BundleKey(String s, Locale l, ClassLoader cl)
{
set(s, l, cl);
}
void set(String s, Locale l, ClassLoader cl)
{
baseName = s;
locale = l;
classLoader = cl;
hashcode = baseName.hashCode() ^ locale.hashCode() ^
classLoader.hashCode();
}
public int hashCode()
{
return hashcode;
}
public boolean equals(Object o)
{
if (! (o instanceof BundleKey))
return false;
BundleKey key = (BundleKey) o;
return hashcode == key.hashcode &&
baseName.equals(key.baseName) &&
locale.equals(key.locale) &&
classLoader.equals(key.classLoader);
}
public Object clone()
{
Object clone = null;
try
{
clone = super.clone();
}
catch (CloneNotSupportedException x) {}
return clone;
}
}
/** A cache lookup key. This avoids having to a new one for every
* getBundle() call. */
private static BundleKey lookupKey = new BundleKey();
/** Singleton cache entry to represent previous failed lookups. */
private static Object nullEntry = new Object();
/**
* Get the appropriate ResourceBundle for the given locale. The following
* strategy is used:
@ -320,81 +378,59 @@ public abstract class ResourceBundle
*/
// This method is synchronized so that the cache is properly
// handled.
public static final synchronized ResourceBundle getBundle
public static synchronized ResourceBundle getBundle
(String baseName, Locale locale, ClassLoader classLoader)
{
// This implementation searches the bundle in the reverse direction
// and builds the parent chain on the fly.
// If the default locale changed since the last time we were called,
// all cache entries are invalidated.
Locale defaultLocale = Locale.getDefault();
if (defaultLocale != lastDefaultLocale)
{
resourceBundleCache = new HashMap();
bundleCache = new HashMap();
lastDefaultLocale = defaultLocale;
}
HashMap cache = (HashMap) resourceBundleCache.get(classLoader);
StringBuffer sb = new StringBuffer(60);
sb.append(baseName).append('_').append(locale);
String name = sb.toString();
if (cache == null)
// This will throw NullPointerException if any arguments are null.
lookupKey.set(baseName, locale, classLoader);
Object obj = bundleCache.get(lookupKey);
ResourceBundle rb = null;
if (obj instanceof ResourceBundle)
{
cache = new HashMap();
resourceBundleCache.put(classLoader, cache);
return (ResourceBundle) obj;
}
else if (cache.containsKey(name))
else if (obj == nullEntry)
{
Reference ref = (Reference) cache.get(name);
// If REF is null, that means that we added a `null' value to
// the hash map. That means we failed to find the bundle
// previously, and we cached that fact. The JDK does this, so
// it must be ok.
if (ref == null)
throw new MissingResourceException("Bundle " + baseName
+ " not found",
baseName, "");
// Lookup has failed previously. Fall through.
}
else
{
// First, look for a bundle for the specified locale. We don't want
// the base bundle this time.
boolean wantBase = locale.equals(defaultLocale);
ResourceBundle bundle = tryBundle(baseName, locale, classLoader,
wantBase);
// Try the default locale if neccessary.
if (bundle == null && !locale.equals(defaultLocale))
bundle = tryBundle(baseName, defaultLocale, classLoader, true);
BundleKey key = (BundleKey) lookupKey.clone();
if (bundle == null)
{
// Cache the fact that this lookup has previously failed.
bundleCache.put(key, nullEntry);
}
else
{
ResourceBundle rb = (ResourceBundle) ref.get();
if (rb != null)
{
// RB should already have the right parent, except if
// something very strange happened.
return rb;
}
// If RB is null, then we previously found it but it was
// collected. So we try again.
// Cache the result and return it.
bundleCache.put(key, bundle);
return bundle;
}
}
// It is ok if this returns null. We aren't required to have the
// base bundle.
ResourceBundle baseBundle = tryBundle(baseName, emptyLocale,
classLoader, null, cache);
// Now use our locale, followed by the default locale. We only
// need to try the default locale if our locale is different, and
// if our locale failed to yield a result other than the base
// bundle.
ResourceBundle bundle = tryLocalBundle(baseName, locale,
classLoader, baseBundle, cache);
if (bundle == baseBundle && !locale.equals(defaultLocale))
{
bundle = tryLocalBundle(baseName, defaultLocale,
classLoader, baseBundle, cache);
// We need to record that the argument locale maps to the
// bundle we just found. If we didn't find a bundle, record
// that instead.
if (bundle == null)
cache.put(name, null);
else
cache.put(name, new SoftReference(bundle));
}
if (bundle == null)
throw new MissingResourceException("Bundle " + baseName + " not found",
baseName, "");
return bundle;
throw new MissingResourceException("Bundle " + baseName + " not found",
baseName, "");
}
/**
@ -423,44 +459,13 @@ public abstract class ResourceBundle
* Tries to load a class or a property file with the specified name.
*
* @param localizedName the name
* @param locale the locale, that must be used exactly
* @param classloader the classloader
* @param bundle the backup (parent) bundle
* @return the resource bundle if it was loaded, otherwise the backup
*/
private static final ResourceBundle tryBundle(String localizedName,
Locale locale,
ClassLoader classloader,
ResourceBundle bundle,
HashMap cache)
private static ResourceBundle tryBundle(String localizedName,
ClassLoader classloader)
{
// First look into the cache.
if (cache.containsKey(localizedName))
{
Reference ref = (Reference) cache.get(localizedName);
// If REF is null, that means that we added a `null' value to
// the hash map. That means we failed to find the bundle
// previously, and we cached that fact. The JDK does this, so
// it must be ok.
if (ref == null)
return null;
else
{
ResourceBundle rb = (ResourceBundle) ref.get();
if (rb != null)
{
// RB should already have the right parent, except if
// something very strange happened.
return rb;
}
// If RB is null, then we previously found it but it was
// collected. So we try again.
}
}
// foundBundle holds exact matches for the localizedName resource
// bundle, which may later be cached.
ResourceBundle foundBundle = null;
ResourceBundle bundle = null;
try
{
Class rbClass;
@ -468,48 +473,36 @@ public abstract class ResourceBundle
rbClass = Class.forName(localizedName);
else
rbClass = classloader.loadClass(localizedName);
foundBundle = (ResourceBundle) rbClass.newInstance();
foundBundle.parent = bundle;
foundBundle.locale = locale;
bundle = (ResourceBundle) rbClass.newInstance();
}
catch (Exception ex)
{
// ignore them all
foundBundle = null;
}
if (foundBundle == null)
catch (IllegalAccessException ex) {}
catch (InstantiationException ex) {}
catch (ClassNotFoundException ex) {}
if (bundle == null)
{
try
{
InputStream is;
final String resourceName
String resourceName
= localizedName.replace('.', '/') + ".properties";
if (classloader == null)
is = ClassLoader.getSystemResourceAsStream(resourceName);
else
is = classloader.getResourceAsStream(resourceName);
if (is != null)
{
foundBundle = new PropertyResourceBundle(is);
foundBundle.parent = bundle;
foundBundle.locale = locale;
}
bundle = new PropertyResourceBundle(is);
}
catch (IOException ex)
{
MissingResourceException mre = new MissingResourceException
("Failed to load bundle", localizedName, "");
mre.initCause(ex);
throw mre;
}
}
// Put the result into the hash table. If we didn't find anything
// here, we record our parent bundle. If we record `null' that means
// nothing, not even the base, was found.
if (foundBundle == null)
foundBundle = bundle;
if (foundBundle == null)
cache.put(localizedName, null);
else
cache.put(localizedName, new SoftReference(foundBundle));
return foundBundle;
return bundle;
}
/**
@ -520,47 +513,71 @@ public abstract class ResourceBundle
* @param locale the locale
* @param classloader the classloader
* @param bundle the backup (parent) bundle
* @param wantBase whether a resource bundle made only from the base name
* (with no locale information attached) should be returned.
* @return the resource bundle if it was loaded, otherwise the backup
*/
private static final ResourceBundle tryLocalBundle(String baseName,
Locale locale,
ClassLoader classloader,
ResourceBundle bundle,
HashMap cache)
private static ResourceBundle tryBundle(String baseName, Locale locale,
ClassLoader classLoader,
boolean wantBase)
{
final String language = locale.getLanguage();
final String country = locale.getCountry();
final String variant = locale.getVariant();
String language = locale.getLanguage();
String country = locale.getCountry();
String variant = locale.getVariant();
int baseLen = baseName.length();
// Build up a StringBuffer containing the complete bundle name, fully
// qualified by locale.
StringBuffer sb = new StringBuffer(baseLen + variant.length() + 7);
StringBuffer sb = new StringBuffer(60);
sb.append(baseName);
sb.append('_');
if (language.length() > 0)
{
sb.append('_');
sb.append(language);
bundle = tryBundle(sb.toString(), new Locale(language),
classloader, bundle, cache);
if (country.length() > 0)
{
sb.append('_');
sb.append(country);
if (variant.length() > 0)
{
sb.append('_');
sb.append(variant);
}
}
}
// If LANGUAGE was empty, we still need to try the other
// components, and the `_' is required.
sb.append('_');
if (country.length() > 0)
// Now try to load bundles, starting with the most specialized name.
// Build up the parent chain as we go.
String bundleName = sb.toString();
ResourceBundle first = null; // The most specialized bundle.
ResourceBundle last = null; // The least specialized bundle.
while (true)
{
sb.append(country);
bundle = tryBundle(sb.toString(), new Locale(language, country),
classloader, bundle, cache);
ResourceBundle foundBundle = tryBundle(bundleName, classLoader);
if (foundBundle != null)
{
if (first == null)
first = foundBundle;
if (last != null)
last.parent = foundBundle;
foundBundle.locale = locale;
last = foundBundle;
}
int idx = bundleName.lastIndexOf('_');
// Try the non-localized base name only if we already have a
// localized child bundle, or wantBase is true.
if (idx > baseLen || (idx == baseLen && (first != null || wantBase)))
bundleName = bundleName.substring(0, idx);
else
break;
}
sb.append('_');
if (variant.length() > 0)
{
sb.append(variant);
bundle = tryBundle(sb.toString(), locale,
classloader, bundle, cache);
}
return bundle;
return first;
}
}