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1   /*
2    * $Id$
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  package org.apache.struts.chain.commands.servlet;
22  
23  import org.apache.struts.Globals;
24  import org.apache.struts.chain.Constants;
25  import org.apache.struts.chain.commands.AbstractSelectModule;
26  import org.apache.struts.chain.contexts.ActionContext;
27  import org.apache.struts.chain.contexts.ServletActionContext;
28  
29  import jakarta.servlet.http.HttpServletRequest;
30  
31  /**
32   * <p>Cache the <code>ModuleConfig</code> and <code>MessageResources</code>
33   * instances for the sub-application module to be used for processing this
34   * request.</p>
35   *
36   * @version $Rev$ $Date: 2005-06-04 10:58:46 -0400 (Sat, 04 Jun 2005)
37   *          $
38   */
39  public class SelectModule extends AbstractSelectModule {
40      // ------------------------------------------------------- Protected Methods
41      protected String getPrefix(ActionContext context) {
42          // Identify the URI from which we will match a module prefix
43          ServletActionContext sacontext = (ServletActionContext) context;
44          HttpServletRequest request = sacontext.getRequest();
45          String uri =
46              (String) request.getAttribute(Constants.INCLUDE_SERVLET_PATH);
47  
48          if (uri == null) {
49              uri = request.getServletPath();
50          }
51  
52          if (uri == null) {
53              throw new IllegalArgumentException("No path information in request");
54          }
55  
56          // Identify the module prefix for the current module
57          String prefix = ""; // Initialize to default prefix
58          String[] prefixes =
59              (String[]) sacontext.getApplicationScope().get(Globals.MODULE_PREFIXES_KEY);
60          int lastSlash = 0;
61  
62          while (prefix.equals("") && ((lastSlash = uri.lastIndexOf("/")) > 0)) {
63              uri = uri.substring(0, lastSlash);
64  
65              for (int i = 0; i < prefixes.length; i++) {
66                  if (uri.equals(prefixes[i])) {
67                      prefix = prefixes[i];
68  
69                      break;
70                  }
71              }
72          }
73  
74          return (prefix);
75      }
76  }