/*
* Copyright 2002-2010 the original author or authors.
*
* 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.springframework.format.datetime.joda;
import java.util.Locale;
import org.joda.time.format.DateTimeFormatter;
import org.springframework.core.NamedThreadLocal;
/**
* A holder for a thread-local user {@link JodaTimeContext}.
*
* @author Keith Donald
* @author Juergen Hoeller
* @since 3.0
*/
public final class JodaTimeContextHolder {
private static final ThreadLocal<JodaTimeContext> jodaTimeContextHolder =
new NamedThreadLocal<JodaTimeContext>("JodaTime Context");
/**
* Reset the JodaTimeContext for the current thread.
*/
public static void resetJodaTimeContext() {
jodaTimeContextHolder.remove();
}
/**
* Associate the given JodaTimeContext with the current thread.
* @param jodaTimeContext the current JodaTimeContext,
* or <code>null</code> to reset the thread-bound context
*/
public static void setJodaTimeContext(JodaTimeContext jodaTimeContext) {
if (jodaTimeContext == null) {
resetJodaTimeContext();
}
else {
jodaTimeContextHolder.set(jodaTimeContext);
}
}
/**
* Return the JodaTimeContext associated with the current thread, if any.
* @return the current JodaTimeContext, or <code>null</code> if none
*/
public static JodaTimeContext getJodaTimeContext() {
return jodaTimeContextHolder.get();
}
/**
* Obtain a DateTimeFormatter with user-specific settings applied to the given base Formatter.
* @param formatter the base formatter that establishes default formatting rules
* (generally user independent)
* @param locale the current user locale (may be <code>null</code> if not known)
* @return the user-specific DateTimeFormatter
*/
public static DateTimeFormatter getFormatter(DateTimeFormatter formatter, Locale locale) {
DateTimeFormatter formatterToUse = (locale != null ? formatter.withLocale(locale) : formatter);
JodaTimeContext context = getJodaTimeContext();
return (context != null ? context.getFormatter(formatterToUse) : formatterToUse);
}
}