1 /**
2 * Licensed under the Artistic License; you may not use this file
3 * except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://displaytag.sourceforge.net/license.html
7 *
8 * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
9 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
10 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
11 */
12 package org.displaytag.util;
13
14 import java.io.UnsupportedEncodingException;
15 import java.net.URLEncoder;
16 import java.util.Enumeration;
17 import java.util.HashMap;
18 import java.util.Map;
19
20 import javax.servlet.http.HttpServletRequest;
21 import javax.servlet.http.HttpServletResponse;
22
23 import org.apache.commons.lang.ObjectUtils;
24 import org.apache.commons.lang.StringUtils;
25 import org.apache.commons.lang.UnhandledException;
26 import org.apache.commons.logging.Log;
27 import org.apache.commons.logging.LogFactory;
28 import org.displaytag.Messages;
29
30
31 /**
32 * Default RequestHelper implementation.
33 * @author Fabrizio Giustina
34 * @version $Revision: 1104 $ ($Author: fgiust $)
35 * @see org.displaytag.util.Href
36 * @see org.displaytag.util.RequestHelper
37 */
38 public class DefaultRequestHelper implements RequestHelper
39 {
40
41 /**
42 * logger.
43 */
44 private static Log log = LogFactory.getLog(DefaultRequestHelper.class);
45
46 /**
47 * original HttpServletRequest.
48 */
49 private HttpServletRequest request;
50
51 /**
52 * original HttpServletResponse.
53 */
54 private HttpServletResponse response;
55
56 /**
57 * Construct a new RequestHelper for the given request.
58 * @param servletRequest HttpServletRequest needed to generate the base href
59 * @param servletResponse HttpServletResponse needed to encode generated urls
60 */
61 public DefaultRequestHelper(HttpServletRequest servletRequest, HttpServletResponse servletResponse)
62 {
63 this.request = servletRequest;
64 this.response = servletResponse;
65 }
66
67 /**
68 * @see org.displaytag.util.RequestHelper#getHref()
69 */
70 public Href getHref()
71 {
72 String requestURI = this.request.getRequestURI();
73 // call encodeURL to preserve session id when cookies are disabled
74 Href href = new DefaultHref(this.response.encodeURL(requestURI));
75 href.setParameterMap(getParameterMap());
76 return href;
77 }
78
79 /**
80 * @see org.displaytag.util.RequestHelper#getParameter(java.lang.String)
81 */
82 public String getParameter(String key)
83 {
84 // actually simply return the parameter, this behaviour could be changed
85 return this.request.getParameter(key);
86 }
87
88 /**
89 * @see org.displaytag.util.RequestHelper#getIntParameter(java.lang.String)
90 */
91 public Integer getIntParameter(String key)
92 {
93 String value = this.request.getParameter(key);
94
95 if (value != null)
96 {
97 try
98 {
99 return new Integer(value);
100 }
101 catch (NumberFormatException e)
102 {
103 // It's ok to ignore, simply return null
104 log.debug(Messages.getString("RequestHelper.invalidparameter", //$NON-NLS-1$
105 new Object[]{key, value}));
106 }
107 }
108
109 return null;
110 }
111
112 /**
113 * @see org.displaytag.util.RequestHelper#getParameterMap()
114 */
115 public Map getParameterMap()
116 {
117
118 Map map = new HashMap();
119
120 // get the parameters names
121 Enumeration parametersName = this.request.getParameterNames();
122
123 while (parametersName.hasMoreElements())
124 {
125 // ... get the value
126 String paramName = (String) parametersName.nextElement();
127
128 request.getParameter(paramName);
129 // put key/value in the map
130 String[] originalValues = (String[]) ObjectUtils.defaultIfNull(
131 this.request.getParameterValues(paramName),
132 new String[0]);
133 String[] values = new String[originalValues.length];
134
135 for (int i = 0; i < values.length; i++)
136 {
137 try
138 {
139 values[i] = URLEncoder.encode(StringUtils.defaultString(originalValues[i]), StringUtils
140 .defaultString(response.getCharacterEncoding(), "UTF8")); //$NON-NLS-1$
141 }
142 catch (UnsupportedEncodingException e)
143 {
144 throw new UnhandledException(e);
145 }
146 }
147 map.put(paramName, values);
148
149 }
150
151 // return the Map
152 return map;
153 }
154
155 }
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