Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
LocalizedWebContextResourceFinder |
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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.tapestry.web; | |
16 | ||
17 | import org.apache.hivemind.util.Defense; | |
18 | import org.apache.hivemind.util.LocalizedNameGenerator; | |
19 | import org.apache.hivemind.util.LocalizedResource; | |
20 | ||
21 | import java.util.Locale; | |
22 | ||
23 | /** | |
24 | * Finds localized resources within a {@link org.apache.tapestry.web.WebContext}.. | |
25 | * | |
26 | * @author Howard Lewis Ship | |
27 | * @since 4.0 | |
28 | */ | |
29 | ||
30 | public class LocalizedWebContextResourceFinder | |
31 | { | |
32 | ||
33 | private WebContext _context; | |
34 | ||
35 | public LocalizedWebContextResourceFinder(WebContext context) | |
36 | 0 | { |
37 | 0 | Defense.notNull(context, "context"); |
38 | ||
39 | 0 | _context = context; |
40 | 0 | } |
41 | ||
42 | /** | |
43 | * Resolves the resource, returning a path representing the closest match | |
44 | * (with respect to the provided locale). Returns null if no match. | |
45 | * <p> | |
46 | * The provided path is split into a base path and a suffix (at the last | |
47 | * period character). The locale will provide different suffixes to the base | |
48 | * path and the first match is returned. | |
49 | */ | |
50 | ||
51 | public LocalizedResource resolve(String contextPath, Locale locale) | |
52 | { | |
53 | 0 | int dotx = contextPath.lastIndexOf('.'); |
54 | String basePath; | |
55 | String suffix; | |
56 | 0 | if (dotx >= 0) |
57 | { | |
58 | 0 | basePath = contextPath.substring(0, dotx); |
59 | 0 | suffix = contextPath.substring(dotx); |
60 | } | |
61 | else | |
62 | { | |
63 | // Resource without extension | |
64 | 0 | basePath = contextPath; |
65 | 0 | suffix = ""; |
66 | } | |
67 | ||
68 | 0 | LocalizedNameGenerator generator = new LocalizedNameGenerator(basePath, |
69 | locale, suffix); | |
70 | ||
71 | 0 | while(generator.more()) |
72 | { | |
73 | 0 | String candidatePath = generator.next(); |
74 | ||
75 | 0 | if (isExistingResource(candidatePath)) |
76 | 0 | return new LocalizedResource(candidatePath, generator.getCurrentLocale()); |
77 | 0 | } |
78 | ||
79 | 0 | return null; |
80 | } | |
81 | ||
82 | private boolean isExistingResource(String path) | |
83 | { | |
84 | 0 | return _context.getResource(path) != null; |
85 | } | |
86 | } |