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.taglib.servlet;
016    
017    import com.liferay.portal.kernel.servlet.DirectServletRegistryUtil;
018    import com.liferay.portal.kernel.util.ContextPathUtil;
019    import com.liferay.portal.kernel.util.GetterUtil;
020    import com.liferay.portal.kernel.util.PropsKeys;
021    import com.liferay.portal.kernel.util.PropsUtil;
022    import com.liferay.portal.kernel.util.WebKeys;
023    
024    import javax.servlet.Servlet;
025    import javax.servlet.ServletContext;
026    import javax.servlet.ServletRequest;
027    import javax.servlet.ServletResponse;
028    import javax.servlet.jsp.JspApplicationContext;
029    import javax.servlet.jsp.JspEngineInfo;
030    import javax.servlet.jsp.JspFactory;
031    import javax.servlet.jsp.PageContext;
032    
033    /**
034     * @author Shuyang Zhou
035     */
036    public class JspFactoryWrapper extends JspFactory {
037    
038            public JspFactoryWrapper(JspFactory jspFactory) {
039                    _jspFactory = jspFactory;
040            }
041    
042            @Override
043            public JspEngineInfo getEngineInfo() {
044                    return _jspFactory.getEngineInfo();
045            }
046    
047            @Override
048            public JspApplicationContext getJspApplicationContext(
049                    ServletContext servletContext) {
050    
051                    return _jspFactory.getJspApplicationContext(servletContext);
052            }
053    
054            @Override
055            public PageContext getPageContext(
056                    Servlet servlet, ServletRequest servletRequest,
057                    ServletResponse servletResponse, String errorPageURL,
058                    boolean needsSession, int buffer, boolean autoflush) {
059    
060                    if (autoflush) {
061                            buffer = _JSP_WRITER_BUFFER_SIZE;
062                    }
063    
064                    PageContext pageContext = _jspFactory.getPageContext(
065                            servlet, servletRequest, servletResponse, errorPageURL,
066                            needsSession, buffer, autoflush);
067    
068                    if (_DIRECT_SERVLET_CONTEXT_ENABLED) {
069                            String servletPath = (String)servletRequest.getAttribute(
070                                    WebKeys.SERVLET_PATH);
071    
072                            if (servletPath != null) {
073                                    servletRequest.removeAttribute(WebKeys.SERVLET_PATH);
074    
075                                    ServletContext servletContext = pageContext.getServletContext();
076    
077                                    String contextPath = ContextPathUtil.getContextPath(
078                                            servletContext);
079    
080                                    DirectServletRegistryUtil.putServlet(
081                                            contextPath.concat(servletPath), servlet);
082                            }
083                    }
084    
085                    return new PageContextWrapper(pageContext);
086            }
087    
088            @Override
089            public void releasePageContext(PageContext pageContext) {
090                    if (pageContext instanceof PageContextWrapper) {
091                            PageContextWrapper pageContextWrapper =
092                                    (PageContextWrapper)pageContext;
093    
094                            pageContext = pageContextWrapper.getWrappedPageContext();
095                    }
096    
097                    _jspFactory.releasePageContext(pageContext);
098            }
099    
100            private static final boolean _DIRECT_SERVLET_CONTEXT_ENABLED =
101                    GetterUtil.getBoolean(
102                            PropsUtil.get(PropsKeys.DIRECT_SERVLET_CONTEXT_ENABLED));
103    
104            private static final int _JSP_WRITER_BUFFER_SIZE = GetterUtil.getInteger(
105                    PropsUtil.get(PropsKeys.JSP_WRITER_BUFFER_SIZE));
106    
107            private final JspFactory _jspFactory;
108    
109    }