001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.portlet;
016    
017    import com.liferay.portal.kernel.language.UTF8Control;
018    import com.liferay.portal.kernel.util.LocaleUtil;
019    import com.liferay.portal.kernel.util.StringPool;
020    import com.liferay.portal.model.Portlet;
021    import com.liferay.registry.Filter;
022    import com.liferay.registry.Registry;
023    import com.liferay.registry.RegistryUtil;
024    import com.liferay.registry.ServiceReference;
025    import com.liferay.registry.ServiceRegistration;
026    import com.liferay.registry.ServiceTracker;
027    import com.liferay.registry.ServiceTrackerCustomizer;
028    import com.liferay.registry.collections.StringServiceRegistrationMap;
029    
030    import java.io.Closeable;
031    
032    import java.util.Iterator;
033    import java.util.Map;
034    import java.util.Map.Entry;
035    import java.util.ResourceBundle;
036    import java.util.Set;
037    import java.util.concurrent.ConcurrentHashMap;
038    
039    /**
040     * @author Raymond Aug??
041     */
042    public class ResourceBundleTracker implements Closeable {
043    
044            public ResourceBundleTracker(ClassLoader classLoader, Portlet portlet) {
045                    _classLoader = classLoader;
046                    _portlet = portlet;
047    
048                    Registry registry = RegistryUtil.getRegistry();
049    
050                    Filter filter = registry.getFilter(
051                            "(&(javax.portlet.name=" + portlet.getPortletId() +
052                                    ")(language.id=*)(objectClass=" +
053                                            ResourceBundle.class.getName() + "))");
054    
055                    _serviceTracker = registry.trackServices(
056                            filter, new ResourceBundleServiceTrackerCustomizer());
057    
058                    _serviceTracker.open();
059            }
060    
061            public void clear() {
062                    Set<Entry<String, ServiceRegistration<ResourceBundle>>> set =
063                            _serviceRegistrations.entrySet();
064    
065                    Iterator<Entry<String, ServiceRegistration<ResourceBundle>>> iterator =
066                            set.iterator();
067    
068                    while (iterator.hasNext()) {
069                            Entry<String, ServiceRegistration<ResourceBundle>> entry =
070                                    iterator.next();
071    
072                            ServiceRegistration<ResourceBundle> serviceRegistration =
073                                    entry.getValue();
074    
075                            serviceRegistration.unregister();
076    
077                            iterator.remove();
078                    }
079            }
080    
081            @Override
082            public void close() {
083                    clear();
084    
085                    _serviceTracker.close();
086            }
087    
088            public ResourceBundle getResourceBundle(String languageId) {
089                    if (languageId == null) {
090                            languageId = StringPool.BLANK;
091                    }
092    
093                    for (Entry<ServiceReference<ResourceBundle>, ResourceBundle> entry :
094                                    _resourceBundles.entrySet()) {
095    
096                            ServiceReference<ResourceBundle> serviceReference = entry.getKey();
097    
098                            Object serviceReferenceLanguageId = serviceReference.getProperty(
099                                    "language.id");
100    
101                            if (languageId.equals(serviceReferenceLanguageId)) {
102                                    return entry.getValue();
103                            }
104                    }
105    
106                    return ResourceBundle.getBundle(
107                            _portlet.getResourceBundle(), LocaleUtil.fromLanguageId(languageId),
108                            _classLoader, UTF8Control.INSTANCE);
109            }
110    
111            private final ClassLoader _classLoader;
112            private final Portlet _portlet;
113            private final Map<ServiceReference<ResourceBundle>, ResourceBundle>
114                    _resourceBundles = new ConcurrentHashMap<>();
115            private final StringServiceRegistrationMap<ResourceBundle>
116                    _serviceRegistrations = new StringServiceRegistrationMap<>();
117            private final ServiceTracker<ResourceBundle, ResourceBundle>
118                    _serviceTracker;
119    
120            private class ResourceBundleServiceTrackerCustomizer
121                    implements ServiceTrackerCustomizer<ResourceBundle, ResourceBundle> {
122    
123                    @Override
124                    public ResourceBundle addingService(
125                            ServiceReference<ResourceBundle> serviceReference) {
126    
127                            Registry registry = RegistryUtil.getRegistry();
128    
129                            ResourceBundle resourceBundle = registry.getService(
130                                    serviceReference);
131    
132                            _resourceBundles.put(serviceReference, resourceBundle);
133    
134                            return resourceBundle;
135                    }
136    
137                    @Override
138                    public void modifiedService(
139                            ServiceReference<ResourceBundle> serviceReference,
140                            ResourceBundle resourceBundle) {
141                    }
142    
143                    @Override
144                    public void removedService(
145                            ServiceReference<ResourceBundle> serviceReference,
146                            ResourceBundle resourceBundle) {
147    
148                            Registry registry = RegistryUtil.getRegistry();
149    
150                            registry.ungetService(serviceReference);
151    
152                            _resourceBundles.remove(serviceReference);
153                    }
154    
155            }
156    
157    }