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.servlet;
016    
017    import com.liferay.portal.kernel.util.ObjectValuePair;
018    
019    import java.io.Closeable;
020    
021    import java.util.HashSet;
022    import java.util.Set;
023    
024    import javax.servlet.ServletRequest;
025    import javax.servlet.ServletRequestWrapper;
026    import javax.servlet.http.HttpServletRequest;
027    
028    /**
029     * @author Shuyang Zhou
030     */
031    public class ThreadLocalFacadeServletRequestWrapperUtil {
032    
033            public static <T extends ServletRequest> ObjectValuePair<T, Closeable>
034                    inject(T servletRequest) {
035    
036                    ServletRequestWrapper previousServletRequestWrapper = null;
037                    ServletRequest currentServletRequest = servletRequest;
038    
039                    while (currentServletRequest != null) {
040                            if (!(currentServletRequest instanceof ServletRequestWrapper)) {
041                                    break;
042                            }
043    
044                            Class<?> clazz = currentServletRequest.getClass();
045    
046                            if (_stopperClassNames.contains(clazz.getName())) {
047                                    break;
048                            }
049    
050                            previousServletRequestWrapper =
051                                    (ServletRequestWrapper)currentServletRequest;
052    
053                            ServletRequestWrapper servletRequestWrapper =
054                                    (ServletRequestWrapper)currentServletRequest;
055    
056                            currentServletRequest = servletRequestWrapper.getRequest();
057                    }
058    
059                    ServletRequestWrapper servletRequestWrapper = null;
060    
061                    if (currentServletRequest instanceof HttpServletRequest) {
062                            servletRequestWrapper =
063                                    new ThreadLocalFacadeHttpServletRequestWrapper(
064                                            previousServletRequestWrapper,
065                                            (HttpServletRequest)currentServletRequest);
066                    }
067                    else {
068                            servletRequestWrapper = new ThreadLocalFacadeServletRequestWrapper(
069                                    previousServletRequestWrapper, currentServletRequest);
070                    }
071    
072                    if (previousServletRequestWrapper != null) {
073                            previousServletRequestWrapper.setRequest(servletRequestWrapper);
074                    }
075                    else {
076                            servletRequest = (T)servletRequestWrapper;
077                    }
078    
079                    Closeable closeable = (Closeable)servletRequestWrapper;
080    
081                    return new ObjectValuePair<T, Closeable>(servletRequest, closeable);
082            }
083    
084            public void setStopperClassNames(Set<String> stopperClassNames) {
085                    _stopperClassNames.clear();
086    
087                    _stopperClassNames.addAll(stopperClassNames);
088            }
089    
090            private static Set<String> _stopperClassNames = new HashSet<String>();
091    
092    }