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1   /**
2    * This file Copyright (c) 2010-2011 Magnolia International
3    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
4    *
5    *
6    * This file is dual-licensed under both the Magnolia
7    * Network Agreement and the GNU General Public License.
8    * You may elect to use one or the other of these licenses.
9    *
10   * This file is distributed in the hope that it will be
11   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12   * implied warranty of MERCHANTABILITY or FITNESS FOR A
13   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14   * Redistribution, except as permitted by whichever of the GPL
15   * or MNA you select, is prohibited.
16   *
17   * 1. For the GPL license (GPL), you can redistribute and/or
18   * modify this file under the terms of the GNU General
19   * Public License, Version 3, as published by the Free Software
20   * Foundation.  You should have received a copy of the GNU
21   * General Public License, Version 3 along with this program;
22   * if not, write to the Free Software Foundation, Inc., 51
23   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24   *
25   * 2. For the Magnolia Network Agreement (MNA), this file
26   * and the accompanying materials are made available under the
27   * terms of the MNA which accompanies this distribution, and
28   * is available at http://www.magnolia-cms.com/mna.html
29   *
30   * Any modifications to this file must keep this entire header
31   * intact.
32   *
33   */
34  package info.magnolia.module.blossom.support;
35  
36  import java.util.Enumeration;
37  import java.util.LinkedHashMap;
38  import javax.servlet.FilterConfig;
39  import javax.servlet.ServletConfig;
40  import javax.servlet.http.HttpServletRequest;
41  import javax.servlet.http.HttpServletRequestWrapper;
42  
43  /**
44   * Miscellaneous utility methods for the Servlet API.
45   *
46   * @since 1.2
47   */
48  public class ServletApiUtils {
49  
50      public static <T extends HttpServletRequestWrapper> T getWrappedRequest(HttpServletRequest request, Class<T> clazz) {
51          while (request != null) {
52              if (clazz.isAssignableFrom(request.getClass())) {
53                  return (T) request;
54              }
55              if (!(request instanceof HttpServletRequestWrapper)) {
56                  break;
57              }
58              request = (HttpServletRequest) ((HttpServletRequestWrapper) request).getRequest();
59          }
60          return null;
61      }
62  
63      public static LinkedHashMap<String, String> initParametersToMap(ServletConfig config) {
64          LinkedHashMap<String, String> initParameters = new LinkedHashMap<String, String>();
65          Enumeration parameterNames = config.getInitParameterNames();
66          while (parameterNames.hasMoreElements()) {
67              String parameterName = (String) parameterNames.nextElement();
68              initParameters.put(parameterName, config.getInitParameter(parameterName));
69          }
70          return initParameters;
71      }
72  
73      public static LinkedHashMap<String, String> initParametersToMap(FilterConfig config) {
74          LinkedHashMap<String, String> initParameters = new LinkedHashMap<String, String>();
75          Enumeration parameterNames = config.getInitParameterNames();
76          while (parameterNames.hasMoreElements()) {
77              String parameterName = (String) parameterNames.nextElement();
78              initParameters.put(parameterName, config.getInitParameter(parameterName));
79          }
80          return initParameters;
81      }
82  }