Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||||||
LocalizedWebContextResourceFinder |
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1 | // Copyright 2004, 2005 The Apache Software Foundation |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | ||
15 | package org.apache.tapestry.web; |
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16 | ||
17 | import org.apache.hivemind.util.Defense; |
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18 | import org.apache.hivemind.util.LocalizedNameGenerator; |
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19 | import org.apache.hivemind.util.LocalizedResource; |
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20 | ||
21 | import java.util.Locale; |
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22 | ||
23 | /** |
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24 | * Finds localized resources within a {@link org.apache.tapestry.web.WebContext}.. |
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25 | * |
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26 | * @author Howard Lewis Ship |
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27 | * @since 4.0 |
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28 | */ |
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29 | ||
30 | public class LocalizedWebContextResourceFinder |
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31 | { |
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32 | ||
33 | private WebContext _context; |
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34 | ||
35 | public LocalizedWebContextResourceFinder(WebContext context) |
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36 | 9 | { |
37 | 9 | Defense.notNull(context, "context"); |
38 | ||
39 | 9 | _context = context; |
40 | 9 | } |
41 | ||
42 | /** |
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43 | * Resolves the resource, returning a path representing the closest match |
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44 | * (with respect to the provided locale). Returns null if no match. |
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45 | * <p> |
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46 | * The provided path is split into a base path and a suffix (at the last |
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47 | * period character). The locale will provide different suffixes to the base |
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48 | * path and the first match is returned. |
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49 | */ |
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50 | ||
51 | public LocalizedResource resolve(String contextPath, Locale locale) |
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52 | { |
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53 | 9 | int dotx = contextPath.lastIndexOf('.'); |
54 | String basePath; |
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55 | String suffix; |
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56 | 9 | if (dotx >= 0) |
57 | { |
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58 | 8 | basePath = contextPath.substring(0, dotx); |
59 | 8 | suffix = contextPath.substring(dotx); |
60 | } |
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61 | else |
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62 | { |
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63 | // Resource without extension |
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64 | 1 | basePath = contextPath; |
65 | 1 | suffix = ""; |
66 | } |
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67 | ||
68 | 9 | LocalizedNameGenerator generator = new LocalizedNameGenerator(basePath, |
69 | locale, suffix); |
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70 | ||
71 | 17 | while(generator.more()) |
72 | { |
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73 | 14 | String candidatePath = generator.next(); |
74 | ||
75 | 14 | if (isExistingResource(candidatePath)) |
76 | 6 | return new LocalizedResource(candidatePath, generator.getCurrentLocale()); |
77 | 8 | } |
78 | ||
79 | 3 | return null; |
80 | } |
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81 | ||
82 | private boolean isExistingResource(String path) |
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83 | { |
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84 | 14 | return _context.getResource(path) != null; |
85 | } |
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86 | } |