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.portlet.dynamicdatamapping.render;
016    
017    import com.liferay.registry.Filter;
018    import com.liferay.registry.Registry;
019    import com.liferay.registry.RegistryUtil;
020    import com.liferay.registry.ServiceReference;
021    import com.liferay.registry.ServiceRegistration;
022    import com.liferay.registry.ServiceTracker;
023    import com.liferay.registry.ServiceTrackerCustomizer;
024    import com.liferay.registry.collections.ServiceRegistrationMap;
025    
026    import java.util.ArrayList;
027    import java.util.HashMap;
028    import java.util.List;
029    import java.util.Map;
030    
031    /**
032     * @author Pablo Carvalho
033     */
034    public class DDMFormFieldRendererRegistryImpl
035            implements DDMFormFieldRendererRegistry {
036    
037            public DDMFormFieldRendererRegistryImpl() {
038                    Registry registry = RegistryUtil.getRegistry();
039    
040                    Class<?> clazz = getClass();
041    
042                    Filter filter = registry.getFilter(
043                            "(&(objectClass=" + DDMFormFieldRenderer.class.getName() +
044                                    ")(!(objectClass=" + clazz.getName() + ")))");
045    
046                    _serviceTracker = registry.trackServices(
047                            filter, new DDMFormFieldRendererServiceTrackerCustomizer());
048    
049                    _serviceTracker.open();
050            }
051    
052            @Override
053            public DDMFormFieldRenderer getDDMFormFieldRenderer(
054                    String ddmFormFieldType) {
055    
056                    List<DDMFormFieldRenderer> ddmFormFieldRenders =
057                            _ddmFormFieldRenderersMap.get(ddmFormFieldType);
058    
059                    if ((ddmFormFieldRenders == null) || ddmFormFieldRenders.isEmpty()) {
060                            return null;
061                    }
062    
063                    return ddmFormFieldRenders.get(ddmFormFieldRenders.size() - 1);
064            }
065    
066            public void setDefaultDDMFormFieldRenderer(
067                    DDMFormFieldRenderer ddmFormFieldRenderer) {
068    
069                    Registry registry = RegistryUtil.getRegistry();
070    
071                    ServiceRegistration<DDMFormFieldRenderer> serviceRegistration =
072                            registry.registerService(
073                                    DDMFormFieldRenderer.class, ddmFormFieldRenderer);
074    
075                    _serviceRegistrations.put(ddmFormFieldRenderer, serviceRegistration);
076            }
077    
078            private final Map<String, List<DDMFormFieldRenderer>>
079                    _ddmFormFieldRenderersMap = new HashMap<>();
080            private final ServiceRegistrationMap<DDMFormFieldRenderer>
081                    _serviceRegistrations = new ServiceRegistrationMap<>();
082            private final ServiceTracker<DDMFormFieldRenderer, DDMFormFieldRenderer>
083                    _serviceTracker;
084    
085            private class DDMFormFieldRendererServiceTrackerCustomizer
086                    implements
087                            ServiceTrackerCustomizer
088                                    <DDMFormFieldRenderer, DDMFormFieldRenderer> {
089    
090                    @Override
091                    public DDMFormFieldRenderer addingService(
092                            ServiceReference<DDMFormFieldRenderer> serviceReference) {
093    
094                            Registry registry = RegistryUtil.getRegistry();
095    
096                            DDMFormFieldRenderer ddmFormFieldRenderer = registry.getService(
097                                    serviceReference);
098    
099                            for (String supportedDDMFormFieldType :
100                                            ddmFormFieldRenderer.getSupportedDDMFormFieldTypes()) {
101    
102                                    List<DDMFormFieldRenderer> ddmFormFieldRenderers =
103                                            _ddmFormFieldRenderersMap.get(supportedDDMFormFieldType);
104    
105                                    if (ddmFormFieldRenderers == null) {
106                                            ddmFormFieldRenderers = new ArrayList<>();
107    
108                                            _ddmFormFieldRenderersMap.put(
109                                                    supportedDDMFormFieldType, ddmFormFieldRenderers);
110                                    }
111    
112                                    ddmFormFieldRenderers.add(ddmFormFieldRenderer);
113                            }
114    
115                            return ddmFormFieldRenderer;
116                    }
117    
118                    @Override
119                    public void modifiedService(
120                            ServiceReference<DDMFormFieldRenderer> serviceReference,
121                            DDMFormFieldRenderer ddmFormFieldRenderer) {
122                    }
123    
124                    @Override
125                    public void removedService(
126                            ServiceReference<DDMFormFieldRenderer> serviceReference,
127                            DDMFormFieldRenderer ddmFormFieldRenderer) {
128    
129                            Registry registry = RegistryUtil.getRegistry();
130    
131                            registry.ungetService(serviceReference);
132    
133                            for (String supportedDDMFormFieldType :
134                                            ddmFormFieldRenderer.getSupportedDDMFormFieldTypes()) {
135    
136                                    List<DDMFormFieldRenderer> ddmFormFieldRenderers =
137                                            _ddmFormFieldRenderersMap.get(supportedDDMFormFieldType);
138    
139                                    if (ddmFormFieldRenderers == null) {
140                                            return;
141                                    }
142    
143                                    ddmFormFieldRenderers.remove(ddmFormFieldRenderer);
144                            }
145                    }
146    
147            }
148    
149    }