1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.shared.util;
20
21 import java.util.Locale;
22 import java.util.StringTokenizer;
23 import java.util.logging.Level;
24 import java.util.logging.Logger;
25
26
27 public final class LocaleUtils
28 {
29 //private static final Log log = LogFactory.getLog(LocaleUtils.class);
30 private static final Logger log = Logger.getLogger(LocaleUtils.class.getName());
31
32 /** Utility class, do not instatiate */
33 private LocaleUtils()
34 {
35 // utility class, do not instantiate
36 }
37
38 /**
39 * Converts a locale string to <code>Locale</code> class. Accepts both
40 * '_' and '-' as separators for locale components.
41 *
42 * @param localeString string representation of a locale
43 * @return Locale instance, compatible with the string representation
44 */
45 public static Locale toLocale(String localeString)
46 {
47 if ((localeString == null) || (localeString.length() == 0))
48 {
49 Locale locale = Locale.getDefault();
50 if(log.isLoggable(Level.WARNING))
51 {
52 log.warning("Locale name in faces-config.xml null or empty, setting locale to default locale : "
53 + locale.toString());
54 }
55 return locale;
56 }
57
58 int separatorCountry = localeString.indexOf('_');
59 char separator;
60 if (separatorCountry >= 0)
61 {
62 separator = '_';
63 }
64 else
65 {
66 separatorCountry = localeString.indexOf('-');
67 separator = '-';
68 }
69
70 String language;
71 String country;
72 String variant;
73 if (separatorCountry < 0)
74 {
75 language = localeString;
76 country = "";
77 variant = "";
78 }
79 else
80 {
81 language = localeString.substring(0, separatorCountry);
82
83 int separatorVariant = localeString.indexOf(separator, separatorCountry + 1);
84 if (separatorVariant < 0)
85 {
86 country = localeString.substring(separatorCountry + 1);
87 variant = "";
88 }
89 else
90 {
91 country = localeString.substring(separatorCountry + 1, separatorVariant);
92 variant = localeString.substring(separatorVariant + 1);
93 }
94 }
95
96 return new Locale(language, country, variant);
97 }
98
99
100 /**
101 * Convert locale string used by converter tags to locale.
102 *
103 * @param name name of the locale
104 * @return locale specified by the given String
105 *
106 * @see org.apache.myfaces.taglib.core.ConvertDateTimeTag#setConverterLocale
107 * @see org.apache.myfaces.taglib.core.ConvertNumberTag#setConverterLocale
108 */
109 public static Locale converterTagLocaleFromString(String name)
110 {
111 try
112 {
113 Locale locale;
114 StringTokenizer st = new StringTokenizer(name, "_");
115 String language = st.nextToken();
116
117 if(st.hasMoreTokens())
118 {
119 String country = st.nextToken();
120
121 if(st.hasMoreTokens())
122 {
123 String variant = st.nextToken();
124 locale = new Locale(language, country, variant);
125 }
126 else
127 {
128 locale = new Locale(language, country);
129 }
130 }
131 else
132 {
133 locale = new Locale(language);
134 }
135
136
137 return locale;
138 }
139 catch(Exception e)
140 {
141 throw new IllegalArgumentException("Locale parsing exception - " +
142 "invalid string representation '" + name + "'");
143 }
144 }
145 }