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org.apache.turbine.services.localization.LocaleDetector |
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1 | package org.apache.turbine.services.localization; |
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2 | ||
3 | /* |
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4 | * Copyright 2001-2005 The Apache Software Foundation. |
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5 | * |
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6 | * Licensed under the Apache License, Version 2.0 (the "License") |
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7 | * you may not use this file except in compliance with the License. |
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8 | * You may obtain a copy of the License at |
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9 | * |
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10 | * http://www.apache.org/licenses/LICENSE-2.0 |
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11 | * |
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12 | * Unless required by applicable law or agreed to in writing, software |
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13 | * distributed under the License is distributed on an "AS IS" BASIS, |
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14 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 | * See the License for the specific language governing permissions and |
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16 | * limitations under the License. |
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17 | */ |
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18 | ||
19 | import java.util.Locale; |
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20 | import java.util.StringTokenizer; |
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21 | ||
22 | import org.apache.commons.configuration.Configuration; |
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23 | ||
24 | import org.apache.turbine.Turbine; |
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25 | import org.apache.turbine.util.RunData; |
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26 | ||
27 | /** |
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28 | * This class returns a Locale object based on the HTTP |
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29 | * Accept-Language header. |
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30 | * |
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31 | * This class is based on examples from Jason Hunter's book <i>Java |
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32 | * Servlet Programming</i>. |
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33 | * |
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34 | * @author <a href="mailto:frank.kim@clearink.com">Frank Y. Kim</a> |
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35 | * @author <a href="mailto:jon@collab.net">Jon S. Stevens</a> |
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36 | * @author <a href="mailto:hps@intermeta.de">Henning P. Schmiedehausen</a> |
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37 | * @version $Id: LocaleDetector.java 264148 2005-08-29 14:21:04Z henning $ |
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38 | * @deprecated Use LocaleTokenizer instead. |
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39 | */ |
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40 | 0 | public class LocaleDetector |
41 | { |
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42 | /** |
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43 | * Attempts to pull the "Accept-Language" header out of the |
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44 | * HttpServletRequest object and then parse it. If the header is |
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45 | * not present, it will return a null Locale. |
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46 | * |
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47 | * @param data Turbine information. |
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48 | * @return A Locale. |
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49 | */ |
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50 | public static Locale getLocale(RunData data) |
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51 | { |
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52 | 0 | String header = data.getRequest().getHeader("Accept-Language"); |
53 | 0 | if (header == null || header.length() == 0) |
54 | 0 | return null; |
55 | 0 | return getLocale(header); |
56 | } |
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57 | ||
58 | /** |
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59 | * This method parses the Accept-Language header and attempts to |
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60 | * create a Locale out of it. |
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61 | * |
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62 | * @param languageHeader A String with the language header. |
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63 | * @return A Locale. |
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64 | */ |
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65 | public static Locale getLocale(String languageHeader) |
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66 | { |
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67 | 0 | Configuration conf = Turbine.getConfiguration(); |
68 | ||
69 | ||
70 | // return a "default" locale |
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71 | 0 | if (languageHeader == null || |
72 | languageHeader.trim().equals("")) |
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73 | { |
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74 | 0 | return new Locale( |
75 | conf.getString("locale.default.language", "en"), |
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76 | conf.getString("locale.default.country", "US")); |
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77 | } |
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78 | ||
79 | // The HTTP Accept-Header is something like |
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80 | // |
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81 | // "en, es;q=0.8, zh-TW;q=0.1" |
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82 | 0 | StringTokenizer tokenizer = new StringTokenizer(languageHeader, ","); |
83 | ||
84 | // while ( tokenizer.hasMoreTokens() ) |
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85 | // { |
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86 | 0 | String language = tokenizer.nextToken(); |
87 | // This should never be true but just in case |
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88 | // if ( !language.trim().equals("") ) |
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89 | 0 | return getLocaleForLanguage(language.trim()); |
90 | // } |
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91 | } |
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92 | ||
93 | /** |
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94 | * This method creates a Locale from the language. |
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95 | * |
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96 | * @param language A String with the language. |
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97 | * @return A Locale. |
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98 | */ |
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99 | private static Locale getLocaleForLanguage(String language) |
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100 | { |
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101 | Locale locale; |
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102 | int semi, dash; |
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103 | ||
104 | // Cut off any q-value that comes after a semicolon. |
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105 | 0 | if ((semi = language.indexOf(';')) != -1) |
106 | { |
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107 | 0 | language = language.substring(0, semi); |
108 | } |
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109 | ||
110 | 0 | language = language.trim(); |
111 | ||
112 | // Create a Locale from the language. A dash may separate the |
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113 | // language from the country. |
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114 | 0 | if ((dash = language.indexOf('-')) == -1) |
115 | { |
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116 | // No dash means no country. |
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117 | 0 | locale = new Locale(language, ""); |
118 | } |
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119 | else |
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120 | { |
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121 | 0 | locale = new Locale(language.substring(0, dash), |
122 | language.substring(dash + 1)); |
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123 | } |
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124 | ||
125 | 0 | return locale; |
126 | } |
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127 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |