| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.felix.status.impl.webconsole; |
| |
| |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.Enumeration; |
| import java.util.HashMap; |
| import java.util.Locale; |
| import java.util.Map; |
| import java.util.PropertyResourceBundle; |
| import java.util.ResourceBundle; |
| |
| import org.osgi.framework.Bundle; |
| import org.osgi.framework.BundleContext; |
| import org.osgi.framework.BundleEvent; |
| import org.osgi.framework.BundleListener; |
| import org.osgi.framework.Constants; |
| |
| |
| /** |
| * The ResourceBundleManager manages resource bundle instance per OSGi Bundle. |
| * It contains a local cache, for bundles, but when a bundle is being unistalled, |
| * its resources stored in the cache are cleaned up. |
| */ |
| public class ResourceBundleManager implements BundleListener |
| { |
| |
| private final BundleContext bundleContext; |
| |
| private final Map<Long, ResourceBundle> resourceBundleCaches; |
| |
| |
| /** |
| * Creates a new object and adds self as a bundle listener |
| * |
| * @param bundleContext the bundle context of the Web Console. |
| */ |
| public ResourceBundleManager( final BundleContext bundleContext ) |
| { |
| this.bundleContext = bundleContext; |
| this.resourceBundleCaches = new HashMap<Long, ResourceBundle>(); |
| |
| bundleContext.addBundleListener( this ); |
| } |
| |
| |
| /** |
| * Removes the bundle lister. |
| */ |
| public void dispose() |
| { |
| bundleContext.removeBundleListener( this ); |
| } |
| |
| |
| /** |
| * This method is used to retrieve a /cached/ instance of the i18n resource associated |
| * with a given bundle. |
| * |
| * @param provider the bundle, provider of the resources |
| * @param locale the requested locale. |
| */ |
| public ResourceBundle getResourceBundle( final Bundle provider ) { |
| ResourceBundle cache; |
| final Long key = new Long( provider.getBundleId() ); |
| synchronized ( resourceBundleCaches ) { |
| cache = resourceBundleCaches.get( key ); |
| if ( cache == null && !resourceBundleCaches.containsKey(key)) { |
| cache = this.loadResourceBundle(provider); |
| resourceBundleCaches.put( key, cache ); |
| } |
| } |
| |
| return cache; |
| } |
| |
| |
| // ---------- BundleListener |
| |
| /** |
| * @see org.osgi.framework.BundleListener#bundleChanged(org.osgi.framework.BundleEvent) |
| */ |
| public final void bundleChanged( BundleEvent event ) |
| { |
| if ( event.getType() == BundleEvent.STOPPED ) |
| { |
| final Long key = new Long( event.getBundle().getBundleId() ); |
| synchronized ( resourceBundleCaches ) |
| { |
| resourceBundleCaches.remove( key ); |
| } |
| } |
| } |
| |
| private static final Locale DEFAULT_LOCALE = Locale.ENGLISH; |
| |
| private ResourceBundle loadResourceBundle(final Bundle bundle) { |
| final String path = "_" + DEFAULT_LOCALE.toString(); //$NON-NLS-1$ |
| final URL source = ( URL ) getResourceBundleEntries(bundle).get( path ); |
| if ( source != null ) { |
| try { |
| return new PropertyResourceBundle( source.openStream() ); |
| } catch ( final IOException ignore ) { |
| // ignore |
| } |
| } |
| return null; |
| } |
| |
| // TODO : Instead of getting all property files, we could just get the one for the default locale |
| private synchronized Map getResourceBundleEntries(final Bundle bundle) |
| { |
| String file = ( String ) bundle.getHeaders().get( Constants.BUNDLE_LOCALIZATION ); |
| if ( file == null ) |
| { |
| file = Constants.BUNDLE_LOCALIZATION_DEFAULT_BASENAME; |
| } |
| |
| // remove leading slash |
| if ( file.startsWith( "/" ) ) //$NON-NLS-1$ |
| { |
| file = file.substring( 1 ); |
| } |
| |
| // split path and base name |
| int slash = file.lastIndexOf( '/' ); |
| String fileName = file.substring( slash + 1 ); |
| String path = ( slash <= 0 ) ? "/" : file.substring( 0, slash ); //$NON-NLS-1$ |
| |
| HashMap resourceBundleEntries = new HashMap(); |
| |
| Enumeration locales = bundle.findEntries( path, fileName + "*.properties", false ); //$NON-NLS-1$ |
| if ( locales != null ) |
| { |
| while ( locales.hasMoreElements() ) |
| { |
| URL entry = ( URL ) locales.nextElement(); |
| |
| // calculate the key |
| String entryPath = entry.getPath(); |
| final int start = entryPath.lastIndexOf( '/' ) + 1 + fileName.length(); // path, slash and base name |
| final int end = entryPath.length() - 11; // .properties suffix |
| entryPath = entryPath.substring( start, end ); |
| |
| // the default language is "name.properties" thus the entry |
| // path is empty and must default to "_"+DEFAULT_LOCALE |
| if (entryPath.length() == 0) { |
| entryPath = "_" + DEFAULT_LOCALE; //$NON-NLS-1$ |
| } |
| |
| // only add this entry, if the "language" is not provided |
| // by the main bundle or an earlier bound fragment |
| if (!resourceBundleEntries.containsKey( entryPath )) { |
| resourceBundleEntries.put( entryPath, entry ); |
| } |
| } |
| } |
| |
| return resourceBundleEntries; |
| } |
| } |