1 /* 2 * Copyright 2002-2009 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 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.aop.aspectj.annotation; 18 19 import org.springframework.aop.aspectj.SingletonAspectInstanceFactory; 20 import org.springframework.core.Ordered; 21 import org.springframework.core.annotation.Order; 22 23 /** 24 * Implementation of {@link MetadataAwareAspectInstanceFactory} that is backed 25 * by a specified singleton object, returning the same instance for every 26 * {@link #getAspectInstance()} call. 27 * 28 * @author Rod Johnson 29 * @author Juergen Hoeller 30 * @since 2.0 31 * @see SimpleMetadataAwareAspectInstanceFactory 32 */ 33 public class SingletonMetadataAwareAspectInstanceFactory extends SingletonAspectInstanceFactory 34 implements MetadataAwareAspectInstanceFactory { 35 36 private final AspectMetadata metadata; 37 38 39 /** 40 * Create a new SingletonMetadataAwareAspectInstanceFactory for the given aspect. 41 * @param aspectInstance the singleton aspect instance 42 * @param aspectName the name of the aspect 43 */ SingletonMetadataAwareAspectInstanceFactory(Object aspectInstance, String aspectName)44 public SingletonMetadataAwareAspectInstanceFactory(Object aspectInstance, String aspectName) { 45 super(aspectInstance); 46 this.metadata = new AspectMetadata(aspectInstance.getClass(), aspectName); 47 } 48 49 getAspectMetadata()50 public final AspectMetadata getAspectMetadata() { 51 return this.metadata; 52 } 53 54 /** 55 * Check whether the aspect class carries an 56 * {@link org.springframework.core.annotation.Order} annotation, 57 * falling back to <code>Ordered.LOWEST_PRECEDENCE</code>. 58 * @see org.springframework.core.annotation.Order 59 */ 60 @Override getOrderForAspectClass(Class<?> aspectClass)61 protected int getOrderForAspectClass(Class<?> aspectClass) { 62 Order order = aspectClass.getAnnotation(Order.class); 63 if (order != null) { 64 return order.value(); 65 } 66 return Ordered.LOWEST_PRECEDENCE; 67 } 68 69 } 70