001    /**
002     * Copyright (c) 2000-2013 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.tools;
016    
017    import com.liferay.portal.kernel.util.Validator;
018    
019    import java.util.HashMap;
020    
021    /**
022     * @author Raymond Aug??
023     */
024    public class ArgumentsMap extends HashMap<String, String> {
025    
026            @Override
027            public String get(Object key) {
028                    String value = super.get(key);
029    
030                    if (Validator.isNull(value)) {
031                            value = System.getProperty((String)key);
032                    }
033    
034                    return value;
035            }
036    
037    }