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Java > Open Source Codes > org > apache > forrest > locationmap > RegexpLocationMapMatcher


1 /*
2  * Copyright 1999-2004 The Apache Software Foundation or its licensors,
3  * as applicable.
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 package org.apache.forrest.locationmap;
18
19 import java.util.Map JavaDoc;
20
21 import org.apache.avalon.framework.parameters.Parameters;
22 import org.apache.avalon.framework.thread.ThreadSafe;
23 import org.apache.forrest.locationmap.lm.LocationMap;
24 import org.apache.cocoon.environment.ObjectModelHelper;
25 import org.apache.cocoon.matching.AbstractRegexpMatcher;
26
27
28 /**
29  * Match a LocationMap URI against a regular expression pattern.
30  *
31  * <p>
32  * The LocationMap URI is a string that is composed of
33  * the input module hint the LocationMap was called with
34  * concatenated with the request URI of the current Request.
35  * </p>
36  *
37  * <a HREF="mailto:unico@hippo.nl">Unico Hommes</a>
38  */
39 public class RegexpLocationMapMatcher extends AbstractRegexpMatcher implements ThreadSafe {
40
41     /**
42      * Return the LocationMap hint concatenated with the request URI.
43      */
44     protected String JavaDoc getMatchString(Map JavaDoc objectModel, Parameters parameters) {
45         
46         String JavaDoc hint = parameters.getParameter(LocationMap.HINT_PARAM,"");
47         String JavaDoc uri = ObjectModelHelper.getRequest(objectModel).getSitemapURI();
48         
49         if (uri.charAt(0) != '/') {
50             uri = "/" + uri;
51         }
52         if (hint.charAt(hint.length()-1) == '/') {
53             hint = hint.substring(0,hint.length()-1);
54         }
55         if (hint.charAt(0) == '/') {
56             hint = hint.substring(1);
57         }
58         
59         return hint + uri;
60     }
61
62 }
63
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