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.kernel.util;
016    
017    import java.util.ArrayList;
018    import java.util.List;
019    import java.util.MissingResourceException;
020    import java.util.ResourceBundle;
021    
022    /**
023     * @author Carlos Sierra Andr??s
024     */
025    public class AggregateResourceBundleLoader implements ResourceBundleLoader {
026    
027            public AggregateResourceBundleLoader(
028                    ResourceBundleLoader... resourceBundleLoaders) {
029    
030                    _resourceBundleLoaders = resourceBundleLoaders;
031            }
032    
033            @Override
034            public ResourceBundle loadResourceBundle(String languageId) {
035                    List<ResourceBundle> resourceBundles = new ArrayList<>();
036    
037                    for (ResourceBundleLoader resourceBundleLoader :
038                                    _resourceBundleLoaders) {
039    
040                            try {
041                                    ResourceBundle resourceBundle =
042                                            resourceBundleLoader.loadResourceBundle(languageId);
043    
044                                    if (resourceBundle != null) {
045                                            resourceBundles.add(resourceBundle);
046                                    }
047                            }
048                            catch (Exception e) {
049                            }
050                    }
051    
052                    if (resourceBundles.isEmpty()) {
053                            throw new MissingResourceException(
054                                    "Resource bundle loader " + this + " was unable to load " +
055                                            "resource bundle for " + languageId,
056                                    StringPool.BLANK, languageId);
057                    }
058    
059                    if (resourceBundles.size() == 1) {
060                            return resourceBundles.get(0);
061                    }
062    
063                    return new AggregateResourceBundle(
064                            resourceBundles.toArray(
065                                    new ResourceBundle[resourceBundles.size()]));
066            }
067    
068            private final ResourceBundleLoader[] _resourceBundleLoaders;
069    
070    }