org.springframework.amqp.support.postprocessor.MessagePostProcessorUtils Maven / Gradle / Ivy
/*
* Copyright 2014-2017 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.amqp.support.postprocessor;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.springframework.amqp.core.MessagePostProcessor;
import org.springframework.core.OrderComparator;
import org.springframework.core.Ordered;
import org.springframework.core.PriorityOrdered;
/**
* Utilities for message post processors.
*
* @author Gary Russell
* @since 1.4.2
*
*/
public final class MessagePostProcessorUtils {
public static Collection sort(Collection processors) {
List priorityOrdered = new ArrayList();
List ordered = new ArrayList();
List unOrdered = new ArrayList();
for (MessagePostProcessor processor : processors) {
if (processor instanceof PriorityOrdered) {
priorityOrdered.add(processor);
}
else if (processor instanceof Ordered) {
ordered.add(processor);
}
else {
unOrdered.add(processor);
}
}
List sorted = new ArrayList();
OrderComparator.sort(priorityOrdered);
sorted.addAll(priorityOrdered);
OrderComparator.sort(ordered);
sorted.addAll(ordered);
sorted.addAll(unOrdered);
return sorted;
}
private MessagePostProcessorUtils() { }
}