01: /*
02: * $Id: SelectModule.java 471754 2006-11-06 14:55:09Z husted $
03: *
04: * Licensed to the Apache Software Foundation (ASF) under one
05: * or more contributor license agreements. See the NOTICE file
06: * distributed with this work for additional information
07: * regarding copyright ownership. The ASF licenses this file
08: * to you under the Apache License, Version 2.0 (the
09: * "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 javax.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: 471754 $ $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 = (String) request
46: .getAttribute(Constants.INCLUDE_SERVLET_PATH);
47:
48: if (uri == null) {
49: uri = request.getServletPath();
50: }
51:
52: if (uri == null) {
53: throw new IllegalArgumentException(
54: "No path information in request");
55: }
56:
57: // Identify the module prefix for the current module
58: String prefix = ""; // Initialize to default prefix
59: String[] prefixes = (String[]) sacontext.getApplicationScope()
60: .get(Globals.MODULE_PREFIXES_KEY);
61: int lastSlash = 0;
62:
63: while (prefix.equals("")
64: && ((lastSlash = uri.lastIndexOf("/")) > 0)) {
65: uri = uri.substring(0, lastSlash);
66:
67: for (int i = 0; i < prefixes.length; i++) {
68: if (uri.equals(prefixes[i])) {
69: prefix = prefixes[i];
70:
71: break;
72: }
73: }
74: }
75:
76: return (prefix);
77: }
78: }
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