/*
* Copyright (C) 2011 Red Hat, Inc. and/or its affiliates.
*
* 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.jboss.errai.bus.client.api.laundry;
/**
* A factory to create instances of {@link LaundryListProvider}.
*
* @author Mike Brock
* @author Jonathan Fuerth <jfuerth@redhat.com>
* @author Christian Sadilek <csadilek@redhat.com>
*/
public class LaundryListProviderFactory {
private static final Object lock = new Object();
private static volatile LaundryListProvider provider;
/**
* The client and server require different laundry list implementations; this method provides the correct
* implementation from wherever is called.
*
* @return the laundry list provider
*/
public static LaundryListProvider get() {
synchronized (lock) {
if (provider == null) {
_initForClient();
}
return provider;
}
}
private static void _initForClient() {
provider = new LaundryListProvider() {
public LaundryList getLaundryList(Object ref) {
return ClientLaundryList.INSTANCE;
}
};
}
/**
* For internal use only. Do not call.
* <p>
* The first provider given wins. Subsequent calls have no effect.
*/
public static void setLaundryListProvider(LaundryListProvider p) {
synchronized (lock) {
if (provider == null) {
provider = p;
}
}
}
}