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Spring Framework example source code file (BeanFactoryAspectInstanceFactory.java)

This example Spring Framework source code file (BeanFactoryAspectInstanceFactory.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

aspectmetadata, aspectmetadata, beanfactory, beanfactoryaspectinstancefactory, beanfactoryaspectinstancefactory, class, classloader, configurablebeanfactory, object, order, order, ordered, string, string

The Spring Framework BeanFactoryAspectInstanceFactory.java source code

/*
 * Copyright 2002-2007 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.aop.aspectj.annotation;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.core.Ordered;
import org.springframework.core.annotation.Order;
import org.springframework.util.ClassUtils;

/**
 * AspectInstanceFactory backed by a Spring
 * {@link org.springframework.beans.factory.BeanFactory}.
 *
 * <p>Note that this may instantiate multiple times if using a prototype,
 * which probably won't give the semantics you expect. 
 * Use a {@link LazySingletonAspectInstanceFactoryDecorator}
 * to wrap this to ensure only one new aspect comes back.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @since 2.0
 * @see org.springframework.beans.factory.BeanFactory
 * @see LazySingletonAspectInstanceFactoryDecorator
 */
public class BeanFactoryAspectInstanceFactory implements MetadataAwareAspectInstanceFactory {

	private final BeanFactory beanFactory;

	private final String name;

	private final AspectMetadata aspectMetadata;


	/**
	 * Create a BeanFactoryAspectInstanceFactory. AspectJ will be called to
	 * introspect to create AJType metadata using the type returned for the
	 * given bean name from the BeanFactory.
	 * @param beanFactory BeanFactory to obtain instance(s) from
	 * @param name name of the bean
	 */
	public BeanFactoryAspectInstanceFactory(BeanFactory beanFactory, String name) {
		this(beanFactory, name, beanFactory.getType(name));
	}
	
	/**
	 * Create a BeanFactoryAspectInstanceFactory, providing a type that AspectJ should
	 * introspect to create AJType metadata. Use if the BeanFactory may consider the type
	 * to be a subclass (as when using CGLIB), and the information should relate to a superclass.
	 * @param beanFactory BeanFactory to obtain instance(s) from
	 * @param name the name of the bean
	 * @param type the type that should be introspected by AspectJ
	 */
	public BeanFactoryAspectInstanceFactory(BeanFactory beanFactory, String name, Class type) {
		this.beanFactory = beanFactory;
		this.name = name;
		this.aspectMetadata = new AspectMetadata(type, name);
	}


	public Object getAspectInstance() {
		return this.beanFactory.getBean(this.name);
	}

	public ClassLoader getAspectClassLoader() {
		if (this.beanFactory instanceof ConfigurableBeanFactory) {
			return ((ConfigurableBeanFactory) this.beanFactory).getBeanClassLoader();
		}
		else {
			return ClassUtils.getDefaultClassLoader();
		}
	}

	public AspectMetadata getAspectMetadata() {
		return this.aspectMetadata;
	}

	/**
	 * Determine the order for this factory's target aspect, either
	 * an instance-specific order expressed through implementing the
	 * {@link org.springframework.core.Ordered} interface (only
	 * checked for singleton beans), or an order expressed through the
	 * {@link org.springframework.core.annotation.Order} annotation
	 * at the class level.
	 * @see org.springframework.core.Ordered
	 * @see org.springframework.core.annotation.Order
	 */
	public int getOrder() {
		Class type = this.beanFactory.getType(this.name);
		if (type != null) {
			if (Ordered.class.isAssignableFrom(type) && this.beanFactory.isSingleton(this.name)) {
				return ((Ordered) this.beanFactory.getBean(this.name)).getOrder();
			}
			Order order = (Order) type.getAnnotation(Order.class);
			if (order != null) {
				return order.value();
			}
		}
		return Ordered.LOWEST_PRECEDENCE;
	}


	@Override
	public String toString() {
		return getClass().getSimpleName() + ": bean name '" + this.name + "'";
	}

}

Other Spring Framework examples (source code examples)

Here is a short list of links related to this Spring Framework BeanFactoryAspectInstanceFactory.java source code file:



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