001    /**
002     * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
003     *
004     * The contents of this file are subject to the terms of the Liferay Enterprise
005     * Subscription License ("License"). You may not use this file except in
006     * compliance with the License. You can obtain a copy of the License by
007     * contacting Liferay, Inc. See the License for the specific language governing
008     * permissions and limitations under the License, including but not limited to
009     * distribution rights of the Software.
010     *
011     *
012     *
013     */
014    
015    package com.liferay.portal.servlet;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.servlet.DirectRequestDispatcherFactory;
020    import com.liferay.portal.kernel.servlet.DirectServletRegistryUtil;
021    import com.liferay.portal.kernel.util.CharPool;
022    import com.liferay.portal.kernel.util.ContextPathUtil;
023    import com.liferay.portal.kernel.util.WebKeys;
024    import com.liferay.portal.util.PropsValues;
025    
026    import javax.servlet.RequestDispatcher;
027    import javax.servlet.Servlet;
028    import javax.servlet.ServletContext;
029    import javax.servlet.ServletRequest;
030    
031    /**
032     * @author Raymond Augé
033     */
034    public class DirectRequestDispatcherFactoryImpl
035            implements DirectRequestDispatcherFactory {
036    
037            public RequestDispatcher getRequestDispatcher(
038                    ServletContext servletContext, String path) {
039    
040                    return new PACLRequestDispatcherWrapper(
041                            servletContext, doGetRequestDispatcher(servletContext, path));
042            }
043    
044            public RequestDispatcher getRequestDispatcher(
045                    ServletRequest servletRequest, String path) {
046    
047                    if (!PropsValues.DIRECT_SERVLET_CONTEXT_ENABLED) {
048                            return servletRequest.getRequestDispatcher(path);
049                    }
050    
051                    ServletContext servletContext =
052                            (ServletContext)servletRequest.getAttribute(WebKeys.CTX);
053    
054                    if (servletContext == null) {
055                            throw new IllegalStateException(
056                                    "Cannot find servlet context in request attributes");
057                    }
058    
059                    return getRequestDispatcher(servletContext, path);
060            }
061    
062            protected RequestDispatcher doGetRequestDispatcher(
063                    ServletContext servletContext, String path) {
064    
065                    if (!PropsValues.DIRECT_SERVLET_CONTEXT_ENABLED) {
066                            return servletContext.getRequestDispatcher(path);
067                    }
068    
069                    if ((path == null) || (path.length() == 0)) {
070                            return null;
071                    }
072    
073                    if (path.charAt(0) != CharPool.SLASH) {
074                            throw new IllegalArgumentException(
075                                    "Path " + path + " is not relative to context root");
076                    }
077    
078                    String contextPath = ContextPathUtil.getContextPath(servletContext);
079    
080                    String fullPath = contextPath.concat(path);
081                    String queryString = null;
082    
083                    int pos = fullPath.indexOf(CharPool.QUESTION);
084    
085                    if (pos != -1) {
086                            queryString = fullPath.substring(pos + 1);
087    
088                            fullPath = fullPath.substring(0, pos);
089                    }
090    
091                    Servlet servlet = DirectServletRegistryUtil.getServlet(fullPath);
092    
093                    if (servlet == null) {
094                            if (_log.isDebugEnabled()) {
095                                    _log.debug("No servlet found for " + fullPath);
096                            }
097    
098                            RequestDispatcher requestDispatcher =
099                                    servletContext.getRequestDispatcher(path);
100    
101                            return new DirectServletPathRegisterDispatcher(
102                                    path, requestDispatcher);
103                    }
104                    else {
105                            if (_log.isDebugEnabled()) {
106                                    _log.debug("Servlet found for " + fullPath);
107                            }
108    
109                            return new DirectRequestDispatcher(servlet, queryString);
110                    }
111            }
112    
113            private static Log _log = LogFactoryUtil.getLog(
114                    DirectRequestDispatcherFactoryImpl.class);
115    
116    }