CookieSelector


1   /*
2    * Copyright 1999-2004 The Apache Software Foundation.
3    * 
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    * 
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    * 
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.apache.cocoon.selection;
17  
18  import org.apache.avalon.framework.configuration.Configurable;
19  import org.apache.avalon.framework.configuration.Configuration;
20  import org.apache.avalon.framework.configuration.ConfigurationException;
21  import org.apache.avalon.framework.logger.AbstractLogEnabled;
22  import org.apache.avalon.framework.parameters.Parameters;
23  import org.apache.avalon.framework.thread.ThreadSafe;
24  
25  import org.apache.cocoon.environment.Cookie;
26  import org.apache.cocoon.environment.ObjectModelHelper;
27  
28  import java.util.Map  ;
29  
30  /**
31   * A <code>Selector</code> that matches a string against a configurable cookie's value.
32   *
33   * <p><b>Global and local configuration</b></p>
34   * <table border="1">
35   * <tr>
36   *  <td><code>cookie-name</code></td>
37   *  <td>Name of the cookie whose value to match against</td>
38   *  </tr>
39   * </table>
40   *
41   * @author <a HREF="mailto:matteodg@infinito.it">Matteo Di Giovinazzo</a>
42   * @version CVS $Id: CookieSelector.java 30932 2004-07-29 17:35:38Z vgritsenko $
43   */
44  public class CookieSelector extends AbstractLogEnabled
45          implements Configurable, Selector, ThreadSafe {
46  
47      protected String   defaultName;
48  
49      public void configure(Configuration config) throws ConfigurationException {
50          this.defaultName = config.getChild("cookie-name").getValue(null);
51      }
52  
53      public boolean select(String   expression, Map   objectModel, Parameters parameters) {
54  
55          String   name = parameters.getParameter("cookie-name", this.defaultName);
56          if (name == null) {
57              getLogger().warn("No cookie name given -- failing.");
58              return false;
59          }
60  
61          Cookie[] cookies = ObjectModelHelper.getRequest(objectModel).getCookies();
62          if (cookies == null) {
63              getLogger().debug("Cookie '" + name + "' not set -- failing");
64              return false;
65          }
66  
67          // TODO: this is not optimized
68          String   value = null;
69          for (int i = 0; i < cookies.length; i++) {
70              if (cookies[i].getName().equals(name)) {
71                  value = cookies[i].getValue();
72                  break;
73              }
74          }
75  
76          if (value == null) {
77              getLogger().debug("Cookie '" + name + "' not set -- failing");
78              return false;
79          }
80  
81          return value.equals(expression);
82      }
83  }
84
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