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Spring Framework example source code file (AnnotationBeanWiringInfoResolver.java)

This example Spring Framework source code file (AnnotationBeanWiringInfoResolver.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

annotationbeanwiringinforesolver, annotationbeanwiringinforesolver, bean, bean, beanwiringinfo, beanwiringinfo, beanwiringinforesolver, configurable, configurable, string

The Spring Framework AnnotationBeanWiringInfoResolver.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.beans.factory.annotation;

import org.springframework.beans.factory.wiring.BeanWiringInfo;
import org.springframework.beans.factory.wiring.BeanWiringInfoResolver;
import org.springframework.util.Assert;
import org.springframework.util.ClassUtils;

/**
 * {@link org.springframework.beans.factory.wiring.BeanWiringInfoResolver} that
 * uses the Configurable annotation to identify which classes need autowiring.
 * The bean name to look up will be taken from the {@link Configurable} annotation
 * if specified; otherwise the default will be the fully-qualified name of the
 * class being configured.
 *
 * @author Rod Johnson
 * @author Juergen Hoeller
 * @since 2.0
 * @see Configurable
 * @see org.springframework.beans.factory.wiring.ClassNameBeanWiringInfoResolver
 */
public class AnnotationBeanWiringInfoResolver implements BeanWiringInfoResolver {

	public BeanWiringInfo resolveWiringInfo(Object beanInstance) {
		Assert.notNull(beanInstance, "Bean instance must not be null");
		Configurable annotation = beanInstance.getClass().getAnnotation(Configurable.class);
		return (annotation != null ? buildWiringInfo(beanInstance, annotation) : null);
	}

	/**
	 * Build the BeanWiringInfo for the given Configurable annotation.
	 * @param beanInstance the bean instance
	 * @param annotation the Configurable annotation found on the bean class
	 * @return the resolved BeanWiringInfo
	 */
	protected BeanWiringInfo buildWiringInfo(Object beanInstance, Configurable annotation) {
		if (!Autowire.NO.equals(annotation.autowire())) {
			return new BeanWiringInfo(annotation.autowire().value(), annotation.dependencyCheck());
		}
		else {
			if (!"".equals(annotation.value())) {
				// explicitly specified bean name
				return new BeanWiringInfo(annotation.value(), false);
			}
			else {
				// default bean name
				return new BeanWiringInfo(getDefaultBeanName(beanInstance), true);
			}
		}
	}

	/**
	 * Determine the default bean name for the specified bean instance.
	 * <p>The default implementation returns the superclass name for a CGLIB
	 * proxy and the name of the plain bean class else.
	 * @param beanInstance the bean instance to build a default name for
	 * @return the default bean name to use
	 * @see org.springframework.util.ClassUtils#getUserClass(Class)
	 */
	protected String getDefaultBeanName(Object beanInstance) {
		return ClassUtils.getUserClass(beanInstance).getName();
	}

}

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