001    /**
002     * Copyright (c) 2000-2011 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.upload;
016    
017    import java.io.IOException;
018    
019    import javax.servlet.ServletInputStream;
020    import javax.servlet.http.HttpServletRequest;
021    import javax.servlet.http.HttpServletRequestWrapper;
022    
023    /**
024     * @author Brian Myunghun Kim
025     * @author Brian Wing Shun Chan
026     */
027    public class LiferayServletRequest extends HttpServletRequestWrapper {
028    
029            public LiferayServletRequest(HttpServletRequest request) {
030                    super(request);
031    
032                    _request = request;
033            }
034    
035            public ServletInputStream getInputStream() throws IOException {
036                    if (_lis == null) {
037                            _lis = new LiferayInputStream(_request);
038    
039                            return _lis;
040                    }
041                    else {
042    
043                            // Return the cached input stream the second time the user requests
044                            // the input stream, otherwise, it will return an empty input stream
045                            // because it has already been parsed
046    
047                            return _lis.getCachedInputStream();
048                    }
049            }
050    
051            private HttpServletRequest _request;
052            private LiferayInputStream _lis = null;
053    
054    }