org.springframework.core.annotation.AnnotationAwareOrderComparator Maven / Gradle / Ivy
/*
* Copyright 2002-2006 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.core.annotation;
import org.springframework.core.OrderComparator;
import org.springframework.core.Ordered;
/**
* {@link java.util.Comparator} implementation that checks
* {@link org.springframework.core.Ordered} as well as the
* {@link Order} annotation, with an order value provided by an
* Ordered instance overriding a statically defined
* annotation value (if any).
*
* @author Juergen Hoeller
* @since 2.0.1
* @see org.springframework.core.Ordered
* @see Order
*/
public class AnnotationAwareOrderComparator extends OrderComparator {
protected int getOrder(Object obj) {
if (obj instanceof Ordered) {
return ((Ordered) obj).getOrder();
}
if (obj != null) {
Order order = obj.getClass().getAnnotation(Order.class);
if (order != null) {
return order.value();
}
}
return Ordered.LOWEST_PRECEDENCE;
}
}