KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > apache > cocoon > matching > WildcardSessionAttributeMatcher


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.matching;
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.parameters.Parameters;
22
23 import org.apache.cocoon.environment.ObjectModelHelper;
24
25 import java.util.Map JavaDoc;
26
27 /**
28  * Matches a session attribute against a wildcard expression.
29  *
30  * <p><b>Global and local configuration</b></p>
31  * <tableborder="1">
32  * <tr><td><code>attribute-name</code></td><td>String identifying the session attribute</td></tr>
33  * </table>
34  *
35  * @author <a HREF="mailto:haul@apache.org">Christian Haul</a>
36  * @author <a HREF="mailto:sylvain@apache.org">Sylvain Wallez</a>
37  * @version CVS $Id: WildcardSessionAttributeMatcher.java 30932 2004-07-29 17:35:38Z vgritsenko $
38  */
39 public class WildcardSessionAttributeMatcher extends AbstractWildcardMatcher
40     implements Configurable
41 {
42     private String JavaDoc defaultParam;
43
44     public void configure(Configuration config) throws ConfigurationException {
45         this.defaultParam = config.getChild("attribute-name").getValue(null);
46         if (getLogger().isDebugEnabled()) {
47             getLogger().debug("Default attribute-name is = '" + this.defaultParam + "'");
48         }
49     }
50
51     protected String JavaDoc getMatchString(Map JavaDoc objectModel, Parameters parameters) {
52
53         String JavaDoc paramName = parameters.getParameter("attribute-name", this.defaultParam);
54         if (paramName == null) {
55             getLogger().warn("No attribute name given. FAILING");
56             return null;
57         }
58
59         Object JavaDoc result = ObjectModelHelper.getRequest(objectModel).getSession().getAttribute(paramName);
60         if (result == null) {
61             getLogger().debug("Session attribute '" + paramName + "' not set.");
62             return null;
63         }
64
65         return result.toString();
66     }
67 }
68
Popular Tags