JspFactorySwapper.java |
1 /** 2 * Copyright (c) 2000-2010 Liferay, Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or modify it under 5 * the terms of the GNU Lesser General Public License as published by the Free 6 * Software Foundation; either version 2.1 of the License, or (at your option) 7 * any later version. 8 * 9 * This library is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 11 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more 12 * details. 13 */ 14 15 package com.liferay.portal.kernel.servlet; 16 17 import javax.servlet.jsp.JspFactory; 18 19 /** 20 * <a href="JspFactorySwapper.java.html"><b><i>View Source</i></b></a> 21 * 22 * @author Shuyang Zhou 23 */ 24 public class JspFactorySwapper { 25 26 public static void swap() { 27 JspFactory jspFactory = JspFactory.getDefaultFactory(); 28 29 if (jspFactory instanceof JspFactoryWrapper) { 30 return; 31 } 32 33 synchronized (JspFactorySwapper.class) { 34 if (_jspFactoryWrapper == null) { 35 _jspFactoryWrapper = new JspFactoryWrapper(jspFactory); 36 } 37 38 JspFactory.setDefaultFactory(_jspFactoryWrapper); 39 } 40 } 41 42 private static JspFactoryWrapper _jspFactoryWrapper; 43 44 }