/*
 * Copyright (C) 2007-2012 Argeo GmbH
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.argeo.util;

import java.util.Locale;

import org.argeo.ArgeoException;

/** Utilities around internationalization. */
public class LocaleUtils {
	/**
	 * The locale of the current thread and its children. Allows to deal with
	 * internationalisation as a cross cutting aspect. Never null.
	 */
	public final static InheritableThreadLocal<Locale> threadLocale = new InheritableThreadLocal<Locale>() {
		@Override
		protected Locale initialValue() {
			return Locale.getDefault();
		}

		@Override
		public void set(Locale value) {
			if (value == null)
				throw new ArgeoException("Thread local cannot be null.");
			super.set(value);
		}

	};
}