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Java > Open Source Codes > org > apache > hivemind > util > LocalizedResourceFinder


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.hivemind.util;
16
17 import java.util.Locale JavaDoc;
18
19 import org.apache.hivemind.ClassResolver;
20
21 /**
22  * Searches for a localization of a
23  * particular resource in the classpath (using
24  * a {@link org.apache.hivemind.ClassResolver}.
25  *
26  *
27  * @author Howard Lewis Ship
28  */
29 public class LocalizedResourceFinder
30 {
31     private ClassResolver _resolver;
32
33     public LocalizedResourceFinder(ClassResolver resolver)
34     {
35         _resolver = resolver;
36     }
37
38     /**
39      * Resolves the resource, returning a path representing
40      * the closest match (with respect to the provided locale).
41      * Returns null if no match.
42      *
43      * <p>The provided path is split into a base path
44      * and a suffix (at the last period character). The locale
45      * will provide different suffixes to the base path
46      * and the first match is returned.
47      */
48     
49     public LocalizedResource resolve(String JavaDoc resourcePath, Locale JavaDoc locale)
50     {
51         int dotx = resourcePath.lastIndexOf('.');
52         String JavaDoc basePath;
53         String JavaDoc suffix;
54         if (dotx >= 0) {
55             basePath = resourcePath.substring(0, dotx);
56             suffix = resourcePath.substring(dotx);
57         }
58         else
59         {
60             // Resource without extension
61 basePath = resourcePath;
62             suffix = "";
63         }
64
65         LocalizedNameGenerator generator = new LocalizedNameGenerator(basePath, locale, suffix);
66
67         while (generator.more())
68         {
69             String JavaDoc candidatePath = generator.next();
70
71             if (_resolver.getResource(candidatePath) != null)
72                 return new LocalizedResource(candidatePath, generator.getCurrentLocale());
73         }
74
75         return null;
76     }
77 }
78
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