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1   /*
2    * $Id: DispatcherServlet.java 757834 2009-03-24 15:14:07Z wesw $
3    *
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *  http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  package org.apache.struts2.portlet.dispatcher;
23  
24  import java.io.IOException;
25  
26  import javax.servlet.ServletException;
27  import javax.servlet.http.HttpServlet;
28  import javax.servlet.http.HttpServletRequest;
29  import javax.servlet.http.HttpServletResponse;
30  
31  import org.apache.struts2.dispatcher.StrutsRequestWrapper;
32  import org.apache.struts2.portlet.PortletActionConstants;
33  import org.apache.commons.lang.xwork.StringUtils;
34  
35  public class DispatcherServlet extends HttpServlet implements PortletActionConstants {
36  
37  	private static final long serialVersionUID = -266147033645951967L;
38  
39  	@Override
40  	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
41  		String dispatchTo = (String) request.getAttribute(DISPATCH_TO);
42  		HttpServletRequest wrapper = wrapRequestIfNecessary(request);
43  		if(StringUtils.isNotEmpty(dispatchTo)) {
44  			request.getRequestDispatcher(dispatchTo).include(wrapper, response);
45  		}
46  	}
47  
48  	private HttpServletRequest wrapRequestIfNecessary(HttpServletRequest request) {
49  		if(!(request instanceof StrutsRequestWrapper)) {
50  			return new StrutsRequestWrapper(request);
51  		}
52  		else {
53  			return request;
54  		}
55  	}
56  
57  }