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.servlet.PersistentHttpServletRequestWrapper;
018    import com.liferay.portal.kernel.util.AutoResetThreadLocal;
019    
020    import java.io.Closeable;
021    
022    import java.util.ArrayList;
023    import java.util.Collections;
024    import java.util.Enumeration;
025    import java.util.List;
026    import java.util.Locale;
027    
028    import javax.servlet.ServletRequest;
029    import javax.servlet.ServletRequestWrapper;
030    import javax.servlet.http.HttpServletRequest;
031    
032    /**
033     * @author Shuyang Zhou
034     */
035    public class ThreadLocalFacadeHttpServletRequestWrapper
036            extends PersistentHttpServletRequestWrapper implements Closeable {
037    
038            public ThreadLocalFacadeHttpServletRequestWrapper(
039                    ServletRequestWrapper servletRequestWrapper,
040                    HttpServletRequest httpServletRequest) {
041    
042                    super(httpServletRequest);
043    
044                    _servletRequestWrapper = servletRequestWrapper;
045    
046                    _nextHttpServletRequestThreadLocal.set(httpServletRequest);
047    
048                    _locales = new ArrayList<Locale>();
049    
050                    Enumeration<Locale> enumeration = httpServletRequest.getLocales();
051    
052                    while (enumeration.hasMoreElements()) {
053                            _locales.add(enumeration.nextElement());
054                    }
055            }
056    
057            @Override
058            public void close() {
059                    if (_servletRequestWrapper != null) {
060                            HttpServletRequest nextHttpServletRequest =
061                                    _nextHttpServletRequestThreadLocal.get();
062    
063                            _servletRequestWrapper.setRequest(nextHttpServletRequest);
064                    }
065            }
066    
067            @Override
068            public Object getAttribute(String name) {
069                    ServletRequest servletRequest = getRequest();
070    
071                    return servletRequest.getAttribute(name);
072            }
073    
074            @Override
075            public Enumeration<String> getAttributeNames() {
076                    ServletRequest servletRequest = getRequest();
077    
078                    return servletRequest.getAttributeNames();
079            }
080    
081            @Override
082            public Enumeration<Locale> getLocales() {
083                    return Collections.enumeration(_locales);
084            }
085    
086            @Override
087            public ServletRequest getRequest() {
088                    return _nextHttpServletRequestThreadLocal.get();
089            }
090    
091            @Override
092            public void removeAttribute(String name) {
093                    ServletRequest servletRequest = getRequest();
094    
095                    servletRequest.removeAttribute(name);
096            }
097    
098            @Override
099            public void setAttribute(String name, Object o) {
100                    ServletRequest servletRequest = getRequest();
101    
102                    servletRequest.setAttribute(name, o);
103            }
104    
105            @Override
106            public void setRequest(ServletRequest servletRequest) {
107                    _nextHttpServletRequestThreadLocal.set(
108                            (HttpServletRequest)servletRequest);
109            }
110    
111            private static ThreadLocal<HttpServletRequest>
112                    _nextHttpServletRequestThreadLocal =
113                            new AutoResetThreadLocal<HttpServletRequest>(
114                                    ThreadLocalFacadeHttpServletRequestWrapper.class +
115                                            "._nextHttpServletRequestThreadLocal") {
116    
117                                    @Override
118                                    protected HttpServletRequest copy(
119                                            HttpServletRequest httpServletRequest) {
120    
121                                            return httpServletRequest;
122                                    }
123    
124                            };
125    
126            private List<Locale> _locales;
127            private ServletRequestWrapper _servletRequestWrapper;
128    
129    }