Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017-present Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | * |
| 16 | */ |
| 17 | |
| 18 | package org.onosproject.ui.lion; |
| 19 | |
Simon Hunt | b804203 | 2017-06-13 15:03:23 -0700 | [diff] [blame] | 20 | import org.slf4j.Logger; |
| 21 | import org.slf4j.LoggerFactory; |
| 22 | |
| 23 | import java.util.Locale; |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 24 | import java.util.ResourceBundle; |
Simon Hunt | b804203 | 2017-06-13 15:03:23 -0700 | [diff] [blame] | 25 | import java.util.Set; |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 26 | |
| 27 | /** |
| 28 | * Utility methods for dealing with Localization Bundles etc. |
| 29 | */ |
| 30 | public final class LionUtils { |
| 31 | |
Simon Hunt | b804203 | 2017-06-13 15:03:23 -0700 | [diff] [blame] | 32 | private static final Logger log = LoggerFactory.getLogger(LionUtils.class); |
| 33 | |
| 34 | private static final String USER_LANGUAGE = "user.language"; |
| 35 | private static final String USER_COUNTRY = "user.country"; |
| 36 | private static final String ONOS_LOCALE = "ONOS_LOCALE"; |
| 37 | private static final String EMPTY = ""; |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 38 | private static final String DOT = "."; |
Simon Hunt | b804203 | 2017-06-13 15:03:23 -0700 | [diff] [blame] | 39 | private static final String LOBAR = "_"; |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 40 | |
| 41 | // no instantiation |
| 42 | private LionUtils() { |
| 43 | } |
| 44 | |
| 45 | /** |
Simon Hunt | b804203 | 2017-06-13 15:03:23 -0700 | [diff] [blame] | 46 | * Parses the given string into language and country codes, and returns |
| 47 | * a {@link Locale} instance initialized with those parameters. |
| 48 | * For example: |
| 49 | * <pre> |
| 50 | * Locale locale = LionUtils.localeFromString("en_GB"); |
| 51 | * locale.getLanguage(); // "en" |
| 52 | * locale.getCountry(); // "GB" |
| 53 | * |
| 54 | * locale = LionUtils.localeFromString("ru"); |
| 55 | * locale.getLanguage(); // "ru" |
| 56 | * locale.getCountry(); // "" |
| 57 | * </pre> |
| 58 | * |
| 59 | * @param s the locale string |
| 60 | * @return a locale instance |
| 61 | */ |
| 62 | public static Locale localeFromString(String s) { |
| 63 | |
| 64 | if (!s.contains(LOBAR)) { |
| 65 | return new Locale(s); |
| 66 | } |
| 67 | String[] items = s.split(LOBAR); |
| 68 | return new Locale(items[0], items[1]); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Sets the default locale, based on the Java properties shown below. |
| 73 | * <pre> |
| 74 | * user.language |
| 75 | * user.country |
| 76 | * </pre> |
| 77 | * It is expected that the host system will have set these properties |
| 78 | * appropriately. Note, however, that the default values can be |
| 79 | * overridden by use of the environment variable {@code ONOS_LOCALE}. |
| 80 | * <p> |
| 81 | * For example, to set the Locale to French-Canadian one can invoke |
| 82 | * (from the shell)... |
| 83 | * <pre> |
| 84 | * $ ONOS_LOCALE=fr_CA {command-to-invoke-onos} ... |
| 85 | * </pre> |
| 86 | * |
| 87 | * @return the runtime locale |
| 88 | */ |
| 89 | public static Locale setupRuntimeLocale() { |
| 90 | Locale systemDefault = Locale.getDefault(); |
| 91 | log.info("System Default Locale: [{}]", systemDefault); |
| 92 | // TODO: Review- do we need to store the system default anywhere? |
| 93 | |
| 94 | // Useful to log the "user.*" properties for debugging... |
| 95 | Set<String> pn = System.getProperties().stringPropertyNames(); |
| 96 | pn.removeIf(f -> !(f.startsWith("user."))); |
| 97 | for (String ukey : pn) { |
| 98 | log.debug(" {}: {}", ukey, System.getProperty(ukey)); |
| 99 | } |
| 100 | |
| 101 | String language = System.getProperty(USER_LANGUAGE); |
| 102 | String country = System.getProperty(USER_COUNTRY); |
| 103 | log.info("Language: [{}], Country: [{}]", language, country); |
| 104 | Locale runtime = new Locale(language != null ? language : EMPTY, |
| 105 | country != null ? country : EMPTY); |
| 106 | |
| 107 | String override = System.getenv(ONOS_LOCALE); |
| 108 | if (override != null) { |
| 109 | log.warn("Override with ONOS_LOCALE: [{}]", override); |
| 110 | runtime = localeFromString(override); |
| 111 | } |
| 112 | |
| 113 | log.info("Setting runtime locale to: [{}]", runtime); |
| 114 | Locale.setDefault(runtime); |
| 115 | return runtime; |
| 116 | } |
| 117 | |
| 118 | /** |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 119 | * This method takes a fully qualified name and returns a |
| 120 | * {@link ResourceBundle} which is loaded from a properties file with |
| 121 | * that base name. |
| 122 | * <p> |
| 123 | * For example, supposing the jar file contains: |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 124 | * <pre> |
| 125 | * org/onosproject/util/example/SomeBundle.properties |
| 126 | * </pre> |
| 127 | * <p> |
| 128 | * Then, to correctly load the resource bundle associated with |
| 129 | * <code>SomeBundle</code>, call: |
| 130 | * <pre> |
| 131 | * String fqname = "org.onosproject.util.example.SomeBundle"; |
| 132 | * ResourceBundle res = ResourceUtils.getBundledResource(fqname); |
| 133 | * </pre> |
| 134 | * <p> |
| 135 | * Note that no error is thrown if the properties file does not exist. |
| 136 | * This condition will not become apparent until you try and access |
| 137 | * a property from the bundle, at which time a |
| 138 | * {@link java.util.MissingResourceException} will be thrown. |
| 139 | * |
| 140 | * @param basename the (fully qualified) basename of the bundle properties |
| 141 | * file |
| 142 | * @return the associated resource bundle |
| 143 | */ |
| 144 | public static ResourceBundle getBundledResource(String basename) { |
| 145 | return ResourceBundle.getBundle(basename); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * This method takes a class and returns a {@link ResourceBundle} which is |
| 150 | * loaded from a properties file with the same base name as the class. |
| 151 | * Note that both the class and the properties file(s) need to be in |
| 152 | * the same jar file. |
| 153 | * <p> |
| 154 | * For example, supposing the jar file contains: |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 155 | * <pre> |
| 156 | * org/onosproject/util/example/SomeObject.class |
| 157 | * org/onosproject/util/example/SomeObject.properties |
| 158 | * </pre> |
| 159 | * <p> |
| 160 | * Then, to correctly load the resource bundle associated with |
| 161 | * <code>SomeObject</code>, call: |
| 162 | * <pre> |
| 163 | * ResourceBundle res = ResourceUtils.getBundledResource(SomeObject.class); |
| 164 | * </pre> |
| 165 | * <p> |
| 166 | * Note that no error is thrown if the properties file does not exist. |
| 167 | * This condition will not become apparent until you try and access |
| 168 | * a property from the bundle, at which time a |
| 169 | * {@link java.util.MissingResourceException} will be thrown. |
| 170 | * |
| 171 | * @param c the class |
| 172 | * @return the associated resource bundle |
| 173 | */ |
| 174 | public static ResourceBundle getBundledResource(Class<?> c) { |
| 175 | return ResourceBundle.getBundle(c.getName()); |
| 176 | } |
| 177 | |
| 178 | /** |
| 179 | * This method returns a {@link ResourceBundle} which is loaded from |
| 180 | * a properties file with the specified base name from the same package |
| 181 | * as the specified class. |
| 182 | * Note that both the class and the properties file(s) need to be in |
| 183 | * the same jar file. |
| 184 | * <p> |
| 185 | * For example, supposing the jar file contains: |
Simon Hunt | 0c85f11 | 2017-06-12 21:02:17 -0700 | [diff] [blame] | 186 | * <pre> |
| 187 | * org/onosproject/util/example/SomeObject.class |
| 188 | * org/onosproject/util/example/DisplayStrings.properties |
| 189 | * </pre> |
| 190 | * <p> |
| 191 | * Then, to correctly load the resource bundle call: |
| 192 | * <pre> |
| 193 | * ResourceBundle res = ResourceUtils.getBundledResource(SomeObject.class, |
| 194 | * "DisplayStrings"); |
| 195 | * </pre> |
| 196 | * <p> |
| 197 | * Note that no error is thrown if the properties file does not exist. |
| 198 | * This condition will not become apparent until you try and access |
| 199 | * a property from the bundle, at which time a |
| 200 | * {@link java.util.MissingResourceException} will be thrown. |
| 201 | * |
| 202 | * @param c the class requesting the bundle |
| 203 | * @param baseName the base name of the resource bundle |
| 204 | * @return the associated resource bundle |
| 205 | */ |
| 206 | public static ResourceBundle getBundledResource(Class<?> c, String baseName) { |
| 207 | String className = c.getName(); |
| 208 | StringBuilder sb = new StringBuilder(); |
| 209 | int dot = className.lastIndexOf(DOT); |
| 210 | sb.append(className.substring(0, dot)); |
| 211 | sb.append(DOT).append(baseName); |
| 212 | return ResourceBundle.getBundle(sb.toString()); |
| 213 | } |
| 214 | } |