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.settings;
016    
017    import com.liferay.portal.kernel.util.StringPool;
018    
019    import java.util.HashMap;
020    import java.util.Map;
021    
022    /**
023     * @author Iv??n Zaera
024     */
025    public class FallbackKeys {
026    
027            public void add(String key, String... fallbackKeysArray) {
028                    if (_fallbackKeysMap.containsKey(key)) {
029                            throw new IllegalArgumentException("Duplicate key " + key);
030                    }
031    
032                    _fallbackKeysMap.put(key, fallbackKeysArray);
033            }
034    
035            public String[] get(String key) {
036                    String[] fallbackKeysArray = _fallbackKeysMap.get(key);
037    
038                    if (fallbackKeysArray == null) {
039                            return StringPool.EMPTY_ARRAY;
040                    }
041    
042                    return fallbackKeysArray;
043            }
044    
045            private final Map<String, String[]> _fallbackKeysMap = new HashMap<>();
046    
047    }