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_orchestra.util;
20
21 import java.util.Locale;
22 import java.util.StringTokenizer;
23
24 import org.apache.commons.logging.Log;
25 import org.apache.commons.logging.LogFactory;
26
27
28 /**
29 * @author Anton Koinov (latest modification by $Author$)
30 * @version $Revision$ $Date$
31 */
32 public final class LocaleUtils
33 {
34 private static final Log log = LogFactory.getLog(LocaleUtils.class);
35
36 /** Utility class, do not instatiate */
37 private LocaleUtils()
38 {
39 // utility class, do not instantiate
40 }
41
42 /**
43 * Converts a locale string to <code>Locale</code> class. Accepts both
44 * '_' and '-' as separators for locale components.
45 *
46 * @param localeString string representation of a locale
47 * @return Locale instance, compatible with the string representation
48 */
49 public static Locale toLocale(String localeString)
50 {
51 if ((localeString == null) || (localeString.length() == 0))
52 {
53 Locale locale = Locale.getDefault();
54 if(log.isWarnEnabled())
55 log.warn("Locale name in faces-config.xml null or empty, setting locale to default locale : "+locale.toString());
56 return locale;
57 }
58
59 int separatorCountry = localeString.indexOf('_');
60 char separator;
61 if (separatorCountry >= 0) {
62 separator = '_';
63 }
64 else
65 {
66 separatorCountry = localeString.indexOf('-');
67 separator = '-';
68 }
69
70 String language, country, variant;
71 if (separatorCountry < 0)
72 {
73 language = localeString;
74 country = variant = "";
75 }
76 else
77 {
78 language = localeString.substring(0, separatorCountry);
79
80 int separatorVariant = localeString.indexOf(separator, separatorCountry + 1);
81 if (separatorVariant < 0)
82 {
83 country = localeString.substring(separatorCountry + 1);
84 variant = "";
85 }
86 else
87 {
88 country = localeString.substring(separatorCountry + 1, separatorVariant);
89 variant = localeString.substring(separatorVariant + 1);
90 }
91 }
92
93 return new Locale(language, country, variant);
94 }
95
96
97 /**
98 * Convert locale string used by converter tags to locale.
99 *
100 * @param name name of the locale
101 * @return locale specified by the given String
102 *
103 * @see org.apache.myfaces.taglib.core.ConvertDateTimeTag#setConverterLocale
104 * @see org.apache.myfaces.taglib.core.ConvertNumberTag#setConverterLocale
105 */
106 public static Locale converterTagLocaleFromString(String name)
107 {
108 try
109 {
110 Locale locale;
111 StringTokenizer st = new StringTokenizer(name, "_");
112 String language = st.nextToken();
113
114 if(st.hasMoreTokens())
115 {
116 String country = st.nextToken();
117
118 if(st.hasMoreTokens())
119 {
120 String variant = st.nextToken();
121 locale = new Locale(language, country, variant);
122 }
123 else
124 {
125 locale = new Locale(language, country);
126 }
127 }
128 else
129 {
130 locale = new Locale(language);
131 }
132
133
134 return locale;
135 }
136 catch(Exception e)
137 {
138 throw new IllegalArgumentException("Locale parsing exception - " +
139 "invalid string representation '" + name + "'");
140 }
141 }
142 }