| /* |
| * 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.inventory.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 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(); |
| |
| 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 = (ResourceBundle) 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; |
| } |
| } |