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.security.permission;
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    import com.liferay.registry.util.StringPlus;
029    
030    import java.util.Collection;
031    import java.util.List;
032    import java.util.Map;
033    import java.util.concurrent.ConcurrentHashMap;
034    
035    /**
036     * @author Gergely Mathe
037     */
038    @ProviderType
039    public class PermissionUpdateHandlerRegistryUtil {
040    
041            public static PermissionUpdateHandler getPermissionUpdateHandler(
042                    String modelClassName) {
043    
044                    return _instance._getPermissionUpdateHandler(modelClassName);
045            }
046    
047            public static List<PermissionUpdateHandler> getPermissionUpdateHandlers() {
048                    return _instance._getPermissionUpdateHandlers();
049            }
050    
051            public static void register(
052                    PermissionUpdateHandler permissionUpdateHandler) {
053    
054                    _instance._register(permissionUpdateHandler);
055            }
056    
057            public static void unregister(
058                    List<PermissionUpdateHandler> permissionUpdateHandlers) {
059    
060                    for (PermissionUpdateHandler permissionUpdateHandler :
061                                    permissionUpdateHandlers) {
062    
063                            unregister(permissionUpdateHandler);
064                    }
065            }
066    
067            public static void unregister(
068                    PermissionUpdateHandler permissionUpdateHandler) {
069    
070                    _instance._unregister(permissionUpdateHandler);
071            }
072    
073            private PermissionUpdateHandlerRegistryUtil() {
074                    Registry registry = RegistryUtil.getRegistry();
075    
076                    _serviceTracker = registry.trackServices(
077                            (Class<PermissionUpdateHandler>)(Class<?>)
078                                    PermissionUpdateHandler.class,
079                            new PermissionUpdateHandlerServiceTrackerCustomizer());
080    
081                    _serviceTracker.open();
082            }
083    
084            private PermissionUpdateHandler _getPermissionUpdateHandler(
085                    String modelClassName) {
086    
087                    return _permissionUpdateHandlers.get(modelClassName);
088            }
089    
090            private List<PermissionUpdateHandler> _getPermissionUpdateHandlers() {
091                    Collection<PermissionUpdateHandler> values =
092                            _permissionUpdateHandlers.values();
093    
094                    return ListUtil.fromCollection(values);
095            }
096    
097            private void _register(PermissionUpdateHandler permissionUpdateHandler) {
098                    Registry registry = RegistryUtil.getRegistry();
099    
100                    ServiceRegistration<PermissionUpdateHandler>
101                            serviceRegistration = registry.registerService(
102                                    (Class<PermissionUpdateHandler>)(Class<?>)
103                                            PermissionUpdateHandler.class,
104                                    permissionUpdateHandler);
105    
106                    _serviceRegistrations.put(permissionUpdateHandler, serviceRegistration);
107            }
108    
109            private void _unregister(PermissionUpdateHandler permissionUpdateHandler) {
110                    ServiceRegistration<PermissionUpdateHandler> serviceRegistration =
111                            _serviceRegistrations.remove(permissionUpdateHandler);
112    
113                    if (serviceRegistration != null) {
114                            serviceRegistration.unregister();
115                    }
116            }
117    
118            private static final PermissionUpdateHandlerRegistryUtil _instance =
119                    new PermissionUpdateHandlerRegistryUtil();
120    
121            private final Map<String, PermissionUpdateHandler>
122                    _permissionUpdateHandlers = new ConcurrentHashMap<>();
123            private final ServiceRegistrationMap<PermissionUpdateHandler>
124                    _serviceRegistrations = new ServiceRegistrationMapImpl<>();
125            private final ServiceTracker
126                    <PermissionUpdateHandler, PermissionUpdateHandler> _serviceTracker;
127    
128            private class PermissionUpdateHandlerServiceTrackerCustomizer
129                    implements ServiceTrackerCustomizer
130                            <PermissionUpdateHandler, PermissionUpdateHandler> {
131    
132                    @Override
133                    public PermissionUpdateHandler addingService(
134                            ServiceReference<PermissionUpdateHandler> serviceReference) {
135    
136                            Registry registry = RegistryUtil.getRegistry();
137    
138                            PermissionUpdateHandler permissionUpdateHandler =
139                                    registry.getService(serviceReference);
140    
141                            List<String> modelClassNames = StringPlus.asList(
142                                    serviceReference.getProperty("model.class.name"));
143    
144                            for (String modelClassName : modelClassNames) {
145                                    _permissionUpdateHandlers.put(
146                                            modelClassName, permissionUpdateHandler);
147                            }
148    
149                            return permissionUpdateHandler;
150                    }
151    
152                    @Override
153                    public void modifiedService(
154                            ServiceReference<PermissionUpdateHandler> serviceReference,
155                            PermissionUpdateHandler permissionUpdateHandler) {
156                    }
157    
158                    @Override
159                    public void removedService(
160                            ServiceReference<PermissionUpdateHandler> serviceReference,
161                            PermissionUpdateHandler permissionUpdateHandler) {
162    
163                            Registry registry = RegistryUtil.getRegistry();
164    
165                            registry.ungetService(serviceReference);
166    
167                            List<String> modelClassNames = StringPlus.asList(
168                                    serviceReference.getProperty("model.class.name"));
169    
170                            for (String modelClassName : modelClassNames) {
171                                    _permissionUpdateHandlers.remove(modelClassName);
172                            }
173                    }
174    
175            }
176    
177    }