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    import com.liferay.registry.collections.ServiceRegistrationMapImpl;
028    
029    import java.util.List;
030    import java.util.Map;
031    import java.util.Set;
032    import java.util.concurrent.ConcurrentHashMap;
033    
034    /**
035     * @author Eduardo Garcia
036     */
037    @ProviderType
038    public class TermsOfUseContentProviderRegistryUtil {
039    
040            public static String[] getClassNames() {
041                    return _instance._getClassNames();
042            }
043    
044            public static TermsOfUseContentProvider getTermsOfUseContentProvider() {
045                    return _instance._getTermsOfUseContentProvider();
046            }
047    
048            public static TermsOfUseContentProvider getTermsOfUseContentProvider(
049                    String className) {
050    
051                    return _instance._getTermsOfUseContentProvider(className);
052            }
053    
054            public static List<TermsOfUseContentProvider>
055                    getTermsOfUseContentProviders() {
056    
057                    return _instance._getTermsOfUseContentProviders();
058            }
059    
060            public static void register(
061                    TermsOfUseContentProvider termsOfUseContentProvider) {
062    
063                    _instance._register(termsOfUseContentProvider);
064            }
065    
066            public static void unregister(
067                    TermsOfUseContentProvider termsOfUseContentProvider) {
068    
069                    _instance._unregister(termsOfUseContentProvider);
070            }
071    
072            private TermsOfUseContentProviderRegistryUtil() {
073                    Registry registry = RegistryUtil.getRegistry();
074    
075                    _serviceTracker = registry.trackServices(
076                            TermsOfUseContentProvider.class,
077                            new TermsOfUseContentProviderServiceTrackerCustomizer());
078    
079                    _serviceTracker.open();
080            }
081    
082            private String[] _getClassNames() {
083                    Set<String> classNames = _termsOfUseContentProviders.keySet();
084    
085                    return classNames.toArray(new String[classNames.size()]);
086            }
087    
088            private TermsOfUseContentProvider _getTermsOfUseContentProvider() {
089                    List<TermsOfUseContentProvider> termsOfUseContentProviders =
090                            _getTermsOfUseContentProviders();
091    
092                    if (termsOfUseContentProviders.isEmpty()) {
093                            return null;
094                    }
095    
096                    return termsOfUseContentProviders.get(0);
097            }
098    
099            private TermsOfUseContentProvider _getTermsOfUseContentProvider(
100                    String className) {
101    
102                    return _termsOfUseContentProviders.get(className);
103            }
104    
105            private List<TermsOfUseContentProvider> _getTermsOfUseContentProviders() {
106                    return ListUtil.fromMapValues(_termsOfUseContentProviders);
107            }
108    
109            private void _register(
110                    TermsOfUseContentProvider termsOfUseContentProvider) {
111    
112                    Registry registry = RegistryUtil.getRegistry();
113    
114                    ServiceRegistration<TermsOfUseContentProvider> serviceRegistration =
115                            registry.registerService(
116                                    TermsOfUseContentProvider.class, termsOfUseContentProvider);
117    
118                    _serviceRegistrations.put(
119                            termsOfUseContentProvider, serviceRegistration);
120            }
121    
122            private void _unregister(
123                    TermsOfUseContentProvider termsOfUseContentProvider) {
124    
125                    ServiceRegistration<TermsOfUseContentProvider> serviceRegistration =
126                            _serviceRegistrations.remove(termsOfUseContentProvider);
127    
128                    if (serviceRegistration != null) {
129                            serviceRegistration.unregister();
130                    }
131            }
132    
133            private static final TermsOfUseContentProviderRegistryUtil _instance =
134                    new TermsOfUseContentProviderRegistryUtil();
135    
136            private final ServiceRegistrationMap<TermsOfUseContentProvider>
137                    _serviceRegistrations = new ServiceRegistrationMapImpl<>();
138            private final ServiceTracker
139                    <TermsOfUseContentProvider, TermsOfUseContentProvider> _serviceTracker;
140            private final Map<String, TermsOfUseContentProvider>
141                    _termsOfUseContentProviders = new ConcurrentHashMap<>();
142    
143            private class TermsOfUseContentProviderServiceTrackerCustomizer
144                    implements ServiceTrackerCustomizer
145                            <TermsOfUseContentProvider, TermsOfUseContentProvider> {
146    
147                    @Override
148                    public TermsOfUseContentProvider addingService(
149                            ServiceReference<TermsOfUseContentProvider> serviceReference) {
150    
151                            Registry registry = RegistryUtil.getRegistry();
152    
153                            TermsOfUseContentProvider termsOfUseContentProvider =
154                                    registry.getService(serviceReference);
155    
156                            _termsOfUseContentProviders.put(
157                                    termsOfUseContentProvider.getClassName(),
158                                    termsOfUseContentProvider);
159    
160                            return termsOfUseContentProvider;
161                    }
162    
163                    @Override
164                    public void modifiedService(
165                            ServiceReference<TermsOfUseContentProvider> serviceReference,
166                            TermsOfUseContentProvider termsOfUseContentProvider) {
167                    }
168    
169                    @Override
170                    public void removedService(
171                            ServiceReference<TermsOfUseContentProvider> serviceReference,
172                            TermsOfUseContentProvider termsOfUseContentProvider) {
173    
174                            Registry registry = RegistryUtil.getRegistry();
175    
176                            registry.ungetService(serviceReference);
177    
178                            _termsOfUseContentProviders.remove(
179                                    termsOfUseContentProvider.getClassName());
180                    }
181    
182            }
183    
184    }