01: /*
02: * Copyright 2002-2006 the original author or authors.
03: *
04: * Licensed under the Apache License, Version 2.0 (the "License");
05: * you may not use this file except in compliance with the License.
06: * You may obtain a copy of the License at
07: *
08: * http://www.apache.org/licenses/LICENSE-2.0
09: *
10: * Unless required by applicable law or agreed to in writing, software
11: * distributed under the License is distributed on an "AS IS" BASIS,
12: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13: * See the License for the specific language governing permissions and
14: * limitations under the License.
15: */
16:
17: package org.springframework.core.annotation;
18:
19: import org.springframework.core.OrderComparator;
20: import org.springframework.core.Ordered;
21:
22: /**
23: * {@link java.util.Comparator} implementation that checks
24: * {@link org.springframework.core.Ordered} as well as the
25: * {@link Order} annotation, with an order value provided by an
26: * <code>Ordered</code> instance overriding a statically defined
27: * annotation value (if any).
28: *
29: * @author Juergen Hoeller
30: * @since 2.0.1
31: * @see org.springframework.core.Ordered
32: * @see Order
33: */
34: public class AnnotationAwareOrderComparator extends OrderComparator {
35:
36: protected int getOrder(Object obj) {
37: if (obj instanceof Ordered) {
38: return ((Ordered) obj).getOrder();
39: }
40: if (obj != null) {
41: Order order = obj.getClass().getAnnotation(Order.class);
42: if (order != null) {
43: return order.value();
44: }
45: }
46: return Ordered.LOWEST_PRECEDENCE;
47: }
48:
49: }
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