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.AutoResetThreadLocal;
018    
019    import java.io.Closeable;
020    
021    import java.util.ArrayList;
022    import java.util.Collections;
023    import java.util.Enumeration;
024    import java.util.List;
025    import java.util.Locale;
026    
027    import javax.servlet.ServletRequest;
028    import javax.servlet.ServletRequestWrapper;
029    
030    /**
031     * @author Shuyang Zhou
032     */
033    public class ThreadLocalFacadeServletRequestWrapper
034            extends ServletRequestWrapper implements Closeable {
035    
036            public ThreadLocalFacadeServletRequestWrapper(
037                    ServletRequestWrapper servletRequestWrapper,
038                    ServletRequest nextServletRequest) {
039    
040                    super(nextServletRequest);
041    
042                    _servletRequestWrapper = servletRequestWrapper;
043    
044                    _nextServletRequestThreadLocal.set(nextServletRequest);
045    
046                    _locales = new ArrayList<Locale>();
047    
048                    Enumeration<Locale> enumeration = nextServletRequest.getLocales();
049    
050                    while (enumeration.hasMoreElements()) {
051                            _locales.add(enumeration.nextElement());
052                    }
053            }
054    
055            @Override
056            public void close() {
057                    if (_servletRequestWrapper != null) {
058                            ServletRequest nextServletRequest =
059                                    _nextServletRequestThreadLocal.get();
060    
061                            _servletRequestWrapper.setRequest(nextServletRequest);
062                    }
063            }
064    
065            @Override
066            public Object getAttribute(String name) {
067                    ServletRequest servletRequest = getRequest();
068    
069                    return servletRequest.getAttribute(name);
070            }
071    
072            @Override
073            public Enumeration<String> getAttributeNames() {
074                    ServletRequest servletRequest = getRequest();
075    
076                    return servletRequest.getAttributeNames();
077            }
078    
079            @Override
080            public Enumeration<Locale> getLocales() {
081                    return Collections.enumeration(_locales);
082            }
083    
084            @Override
085            public ServletRequest getRequest() {
086                    return _nextServletRequestThreadLocal.get();
087            }
088    
089            @Override
090            public void removeAttribute(String name) {
091                    ServletRequest servletRequest = getRequest();
092    
093                    servletRequest.removeAttribute(name);
094            }
095    
096            @Override
097            public void setAttribute(String name, Object o) {
098                    ServletRequest servletRequest = getRequest();
099    
100                    servletRequest.setAttribute(name, o);
101            }
102    
103            @Override
104            public void setRequest(ServletRequest servletRequest) {
105                    _nextServletRequestThreadLocal.set(servletRequest);
106            }
107    
108            private static ThreadLocal<ServletRequest> _nextServletRequestThreadLocal =
109                    new AutoResetThreadLocal<ServletRequest>(
110                            ThreadLocalFacadeServletRequestWrapper.class +
111                                    "._nextServletRequestThreadLocal") {
112    
113                            @Override
114                            protected ServletRequest copy(ServletRequest servletRequest) {
115                                    return servletRequest;
116                            }
117    
118                    };
119    
120            private List<Locale> _locales;
121            private ServletRequestWrapper _servletRequestWrapper;
122    
123    }