org.hibernate.validator.resourceloading.CachingResourceBundleLocator Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source
* Copyright 2010, Red Hat, Inc. and/or its affiliates, and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* 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.hibernate.validator.resourceloading;
import java.util.Locale;
import java.util.ResourceBundle;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import org.hibernate.validator.spi.resourceloading.ResourceBundleLocator;
/**
* A {@link ResourceBundleLocator} implementation that wraps around another
* locator and caches values retrieved from that locator.
*
* @author Gunnar Morling
* @author Kevin Pollet (C) 2011 SERLI
*/
public class CachingResourceBundleLocator extends DelegatingResourceBundleLocator {
private final ConcurrentMap bundleCache = new ConcurrentHashMap();
/**
* Creates a new CachingResourceBundleLocator.
*
* @param delegate The locator from which the values actually will be retrieved.
*/
public CachingResourceBundleLocator(ResourceBundleLocator delegate) {
super( delegate );
}
public ResourceBundle getResourceBundle(Locale locale) {
ResourceBundle cachedResourceBundle = bundleCache.get( locale );
if ( cachedResourceBundle == null ) {
final ResourceBundle bundle = super.getResourceBundle( locale );
if ( bundle != null ) {
cachedResourceBundle = bundleCache.putIfAbsent( locale, bundle );
if ( cachedResourceBundle == null ) {
return bundle;
}
}
}
return cachedResourceBundle;
}
}