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            public void close() {
058                    if (_servletRequestWrapper != null) {
059                            HttpServletRequest nextHttpServletRequest =
060                                    _nextHttpServletRequestThreadLocal.get();
061    
062                            _servletRequestWrapper.setRequest(nextHttpServletRequest);
063                    }
064            }
065    
066            @Override
067            public Object getAttribute(String name) {
068                    ServletRequest servletRequest = getRequest();
069    
070                    return servletRequest.getAttribute(name);
071            }
072    
073            @Override
074            public Enumeration<String> getAttributeNames() {
075                    ServletRequest servletRequest = getRequest();
076    
077                    return servletRequest.getAttributeNames();
078            }
079    
080            @Override
081            public Enumeration<Locale> getLocales() {
082                    return Collections.enumeration(_locales);
083            }
084    
085            @Override
086            public ServletRequest getRequest() {
087                    return _nextHttpServletRequestThreadLocal.get();
088            }
089    
090            @Override
091            public void removeAttribute(String name) {
092                    ServletRequest servletRequest = getRequest();
093    
094                    servletRequest.removeAttribute(name);
095            }
096    
097            @Override
098            public void setAttribute(String name, Object o) {
099                    ServletRequest servletRequest = getRequest();
100    
101                    servletRequest.setAttribute(name, o);
102            }
103    
104            @Override
105            public void setRequest(ServletRequest servletRequest) {
106                    _nextHttpServletRequestThreadLocal.set(
107                            (HttpServletRequest)servletRequest);
108            }
109    
110            private static ThreadLocal<HttpServletRequest>
111                    _nextHttpServletRequestThreadLocal =
112                            new AutoResetThreadLocal<HttpServletRequest>(
113                                    ThreadLocalFacadeHttpServletRequestWrapper.class +
114                                            "._nextHttpServletRequestThreadLocal") {
115    
116                                    @Override
117                                    protected HttpServletRequest copy(
118                                            HttpServletRequest httpServletRequest) {
119    
120                                            return httpServletRequest;
121                                    }
122    
123                            };
124    
125            private List<Locale> _locales;
126            private ServletRequestWrapper _servletRequestWrapper;
127    
128    }