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.util.LocaleUtil;
018    import com.liferay.portal.kernel.util.ResourceBundleUtil;
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    import com.liferay.registry.collections.StringServiceRegistrationMapImpl;
030    
031    import java.io.Closeable;
032    
033    import java.util.Iterator;
034    import java.util.Map;
035    import java.util.Map.Entry;
036    import java.util.ResourceBundle;
037    import java.util.Set;
038    import java.util.concurrent.ConcurrentHashMap;
039    
040    /**
041     * @author Raymond Aug??
042     */
043    public class ResourceBundleTracker implements Closeable {
044    
045            public ResourceBundleTracker(ClassLoader classLoader, Portlet portlet) {
046                    _classLoader = classLoader;
047                    _portlet = portlet;
048    
049                    Registry registry = RegistryUtil.getRegistry();
050    
051                    Filter filter = registry.getFilter(
052                            "(&(javax.portlet.name=" + portlet.getPortletId() +
053                                    ")(language.id=*)(objectClass=" +
054                                            ResourceBundle.class.getName() + "))");
055    
056                    _serviceTracker = registry.trackServices(
057                            filter, new ResourceBundleServiceTrackerCustomizer());
058    
059                    _serviceTracker.open();
060            }
061    
062            public void clear() {
063                    Set<Entry<String, ServiceRegistration<ResourceBundle>>> set =
064                            _serviceRegistrations.entrySet();
065    
066                    Iterator<Entry<String, ServiceRegistration<ResourceBundle>>> iterator =
067                            set.iterator();
068    
069                    while (iterator.hasNext()) {
070                            Entry<String, ServiceRegistration<ResourceBundle>> entry =
071                                    iterator.next();
072    
073                            ServiceRegistration<ResourceBundle> serviceRegistration =
074                                    entry.getValue();
075    
076                            serviceRegistration.unregister();
077    
078                            iterator.remove();
079                    }
080            }
081    
082            @Override
083            public void close() {
084                    clear();
085    
086                    _serviceTracker.close();
087            }
088    
089            public ResourceBundle getResourceBundle(String languageId) {
090                    if (languageId == null) {
091                            languageId = StringPool.BLANK;
092                    }
093    
094                    ResourceBundle resourceBundle = _resourceBundles.get(languageId);
095    
096                    if (resourceBundle != null) {
097                            return resourceBundle;
098                    }
099    
100                    return ResourceBundleUtil.getBundle(
101                            _portlet.getResourceBundle(), LocaleUtil.fromLanguageId(languageId),
102                            _classLoader);
103            }
104    
105            private final ClassLoader _classLoader;
106            private final Portlet _portlet;
107            private final Map<String, ResourceBundle> _resourceBundles =
108                    new ConcurrentHashMap<>();
109            private final StringServiceRegistrationMap<ResourceBundle>
110                    _serviceRegistrations = new StringServiceRegistrationMapImpl<>();
111            private final ServiceTracker<ResourceBundle, ResourceBundle>
112                    _serviceTracker;
113    
114            private class ResourceBundleServiceTrackerCustomizer
115                    implements ServiceTrackerCustomizer<ResourceBundle, ResourceBundle> {
116    
117                    @Override
118                    public ResourceBundle addingService(
119                            ServiceReference<ResourceBundle> serviceReference) {
120    
121                            Registry registry = RegistryUtil.getRegistry();
122    
123                            ResourceBundle resourceBundle = registry.getService(
124                                    serviceReference);
125    
126                            _resourceBundles.put(
127                                    (String)serviceReference.getProperty("language.id"),
128                                    resourceBundle);
129    
130                            return resourceBundle;
131                    }
132    
133                    @Override
134                    public void modifiedService(
135                            ServiceReference<ResourceBundle> serviceReference,
136                            ResourceBundle resourceBundle) {
137                    }
138    
139                    @Override
140                    public void removedService(
141                            ServiceReference<ResourceBundle> serviceReference,
142                            ResourceBundle resourceBundle) {
143    
144                            Registry registry = RegistryUtil.getRegistry();
145    
146                            registry.ungetService(serviceReference);
147    
148                            _resourceBundles.remove(
149                                    serviceReference.getProperty("language.id"));
150                    }
151    
152            }
153    
154    }