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.registry;
016    
017    import com.liferay.portal.kernel.util.ListUtil;
018    import com.liferay.registry.Registry;
019    import com.liferay.registry.RegistryUtil;
020    import com.liferay.registry.ServiceReference;
021    import com.liferay.registry.ServiceTracker;
022    import com.liferay.registry.ServiceTrackerCustomizer;
023    
024    import java.util.Collections;
025    import java.util.List;
026    import java.util.Map;
027    import java.util.Set;
028    import java.util.concurrent.ConcurrentHashMap;
029    
030    /**
031     * @author Marcellus Tavares
032     */
033    public class DDMFormFieldTypeRegistryImpl implements DDMFormFieldTypeRegistry {
034    
035            public DDMFormFieldTypeRegistryImpl() {
036                    Registry registry = RegistryUtil.getRegistry();
037    
038                    _serviceTracker = registry.trackServices(
039                            DDMFormFieldType.class,
040                            new DDMFormFieldTypeServiceTrackerCustomizer());
041    
042                    _serviceTracker.open();
043            }
044    
045            @Override
046            public DDMFormFieldType getDDMFormFieldType(String name) {
047                    return _ddmFormFieldTypesMap.get(name);
048            }
049    
050            @Override
051            public Set<String> getDDMFormFieldTypeNames() {
052                    return Collections.unmodifiableSet(_ddmFormFieldTypesMap.keySet());
053            }
054    
055            @Override
056            public List<DDMFormFieldType> getDDMFormFieldTypes() {
057                    List<DDMFormFieldType> ddmFormFieldTypes = ListUtil.fromCollection(
058                            _ddmFormFieldTypesMap.values());
059    
060                    return Collections.unmodifiableList(ddmFormFieldTypes);
061            }
062    
063            private final Map<String, DDMFormFieldType> _ddmFormFieldTypesMap =
064                    new ConcurrentHashMap<>();
065            private final ServiceTracker<DDMFormFieldType, DDMFormFieldType>
066                    _serviceTracker;
067    
068            private class DDMFormFieldTypeServiceTrackerCustomizer
069                    implements
070                            ServiceTrackerCustomizer<DDMFormFieldType, DDMFormFieldType> {
071    
072                    @Override
073                    public DDMFormFieldType addingService(
074                            ServiceReference<DDMFormFieldType> serviceReference) {
075    
076                            Registry registry = RegistryUtil.getRegistry();
077    
078                            DDMFormFieldType ddmFormFieldType = registry.getService(
079                                    serviceReference);
080    
081                            _ddmFormFieldTypesMap.put(
082                                    ddmFormFieldType.getName(), ddmFormFieldType);
083    
084                            return ddmFormFieldType;
085                    }
086    
087                    @Override
088                    public void modifiedService(
089                            ServiceReference<DDMFormFieldType> serviceReference,
090                            DDMFormFieldType ddmFormFieldType) {
091                    }
092    
093                    @Override
094                    public void removedService(
095                            ServiceReference<DDMFormFieldType> serviceReference,
096                            DDMFormFieldType ddmFormFieldType) {
097    
098                            Registry registry = RegistryUtil.getRegistry();
099    
100                            registry.ungetService(serviceReference);
101    
102                            _ddmFormFieldTypesMap.remove(ddmFormFieldType.getName());
103                    }
104    
105            }
106    
107    }