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.util;
016    
017    import aQute.bnd.annotation.ProviderType;
018    
019    import com.liferay.portal.kernel.util.ListUtil;
020    import com.liferay.registry.Registry;
021    import com.liferay.registry.RegistryUtil;
022    import com.liferay.registry.ServiceReference;
023    import com.liferay.registry.ServiceRegistration;
024    import com.liferay.registry.ServiceTracker;
025    import com.liferay.registry.ServiceTrackerCustomizer;
026    import com.liferay.registry.collections.ServiceRegistrationMap;
027    
028    import java.util.List;
029    import java.util.Map;
030    import java.util.Set;
031    import java.util.concurrent.ConcurrentHashMap;
032    
033    /**
034     * @author Eduardo Garcia
035     */
036    @ProviderType
037    public class TermsOfUseContentProviderRegistryUtil {
038    
039            public static String[] getClassNames() {
040                    return _instance._getClassNames();
041            }
042    
043            public static TermsOfUseContentProvider getTermsOfUseContentProvider() {
044                    return _instance._getTermsOfUseContentProvider();
045            }
046    
047            public static TermsOfUseContentProvider getTermsOfUseContentProvider(
048                    String className) {
049    
050                    return _instance._getTermsOfUseContentProvider(className);
051            }
052    
053            public static List<TermsOfUseContentProvider>
054                    getTermsOfUseContentProviders() {
055    
056                    return _instance._getTermsOfUseContentProviders();
057            }
058    
059            public static void register(
060                    TermsOfUseContentProvider termsOfUseContentProvider) {
061    
062                    _instance._register(termsOfUseContentProvider);
063            }
064    
065            public static void unregister(
066                    TermsOfUseContentProvider termsOfUseContentProvider) {
067    
068                    _instance._unregister(termsOfUseContentProvider);
069            }
070    
071            private TermsOfUseContentProviderRegistryUtil() {
072                    Registry registry = RegistryUtil.getRegistry();
073    
074                    _serviceTracker = registry.trackServices(
075                            TermsOfUseContentProvider.class,
076                            new TermsOfUseContentProviderServiceTrackerCustomizer());
077    
078                    _serviceTracker.open();
079            }
080    
081            private String[] _getClassNames() {
082                    Set<String> classNames = _termsOfUseContentProviders.keySet();
083    
084                    return classNames.toArray(new String[classNames.size()]);
085            }
086    
087            private TermsOfUseContentProvider _getTermsOfUseContentProvider() {
088                    List<TermsOfUseContentProvider> termsOfUseContentProviders =
089                            _getTermsOfUseContentProviders();
090    
091                    if (termsOfUseContentProviders.isEmpty()) {
092                            return null;
093                    }
094    
095                    return termsOfUseContentProviders.get(0);
096            }
097    
098            private TermsOfUseContentProvider _getTermsOfUseContentProvider(
099                    String className) {
100    
101                    return _termsOfUseContentProviders.get(className);
102            }
103    
104            private List<TermsOfUseContentProvider> _getTermsOfUseContentProviders() {
105                    return ListUtil.fromMapValues(_termsOfUseContentProviders);
106            }
107    
108            private void _register(
109                    TermsOfUseContentProvider termsOfUseContentProvider) {
110    
111                    Registry registry = RegistryUtil.getRegistry();
112    
113                    ServiceRegistration<TermsOfUseContentProvider> serviceRegistration =
114                            registry.registerService(
115                                    TermsOfUseContentProvider.class, termsOfUseContentProvider);
116    
117                    _serviceRegistrations.put(
118                            termsOfUseContentProvider, serviceRegistration);
119            }
120    
121            private void _unregister(
122                    TermsOfUseContentProvider termsOfUseContentProvider) {
123    
124                    ServiceRegistration<TermsOfUseContentProvider> serviceRegistration =
125                            _serviceRegistrations.remove(termsOfUseContentProvider);
126    
127                    if (serviceRegistration != null) {
128                            serviceRegistration.unregister();
129                    }
130            }
131    
132            private static final TermsOfUseContentProviderRegistryUtil _instance =
133                    new TermsOfUseContentProviderRegistryUtil();
134    
135            private final ServiceRegistrationMap<TermsOfUseContentProvider>
136                    _serviceRegistrations = new ServiceRegistrationMap<>();
137            private final ServiceTracker<TermsOfUseContentProvider,
138                    TermsOfUseContentProvider> _serviceTracker;
139            private final Map<String, TermsOfUseContentProvider>
140                    _termsOfUseContentProviders = new ConcurrentHashMap<>();
141    
142            private class TermsOfUseContentProviderServiceTrackerCustomizer
143                    implements ServiceTrackerCustomizer<TermsOfUseContentProvider,
144                            TermsOfUseContentProvider> {
145    
146                    @Override
147                    public TermsOfUseContentProvider addingService(
148                            ServiceReference<TermsOfUseContentProvider> serviceReference) {
149    
150                            Registry registry = RegistryUtil.getRegistry();
151    
152                            TermsOfUseContentProvider termsOfUseContentProvider =
153                                    registry.getService(serviceReference);
154    
155                            _termsOfUseContentProviders.put(
156                                    termsOfUseContentProvider.getClassName(),
157                                    termsOfUseContentProvider);
158    
159                            return termsOfUseContentProvider;
160                    }
161    
162                    @Override
163                    public void modifiedService(
164                            ServiceReference<TermsOfUseContentProvider> serviceReference,
165                            TermsOfUseContentProvider termsOfUseContentProvider) {
166                    }
167    
168                    @Override
169                    public void removedService(
170                            ServiceReference<TermsOfUseContentProvider> serviceReference,
171                            TermsOfUseContentProvider termsOfUseContentProvider) {
172    
173                            Registry registry = RegistryUtil.getRegistry();
174    
175                            registry.ungetService(serviceReference);
176    
177                            _termsOfUseContentProviders.remove(
178                                    termsOfUseContentProvider.getClassName());
179                    }
180    
181            }
182    
183    }