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.kernel.servlet;
016    
017    import javax.servlet.ServletContext;
018    
019    /**
020     * @author Shuyang Zhou
021     * @author Brian Wing Shun Chan
022     */
023    public class ServletVersionDetector {
024    
025            public static boolean is2_5() {
026                    if (_2_5 != null) {
027                            return _2_5.booleanValue();
028                    }
029    
030                    try {
031                            ServletContext.class.getMethod("getContextPath");
032    
033                            _2_5 = Boolean.TRUE;
034                    }
035                    catch (Exception e) {
036                            _2_5 = Boolean.FALSE;
037                    }
038    
039                    return _2_5.booleanValue();
040            }
041    
042            private static Boolean _2_5;
043    
044    }