base/runtime/org.argeo.util/src/main/java/org/argeo/util/LocaleUtils.java

   1 /*
   2  * Copyright (C) 2007-2012 Argeo GmbH
   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 package org.argeo.util;
  17
  18 import java.util.Locale;
  19
  20 import org.argeo.ArgeoException;
  21
  22 /** Utilities around internationalization. */
  23 public class LocaleUtils {
  24         /**
  25          * The locale of the current thread and its children. Allows to deal with
  26          * internationalisation as a cross cutting aspect. Never null.
  27          */
  28         public final static InheritableThreadLocal<Locale> threadLocale = new InheritableThreadLocal<Locale>() {
  29                 @Override
  30                 protected Locale initialValue() {
  31                         return Locale.getDefault();
  32                 }
  33
  34                 @Override
  35                 public void set(Locale value) {
  36                         if (value == null)
  37                                 throw new ArgeoException("Thread local cannot be null.");
  38                         super.set(value);
  39                 }
  40
  41         };
  42 }