org.springframework.beans.factory.annotation.AnnotationBeanWiringInfoResolver Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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
*
* https://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.lang.Nullable;
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 {
@Override
@Nullable
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 {@link BeanWiringInfo} for the given {@link 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())) {
// Autowiring by name or by type
return new BeanWiringInfo(annotation.autowire().value(), annotation.dependencyCheck());
}
else if (!annotation.value().isEmpty()) {
// Explicitly specified bean name for bean definition to take property values from
return new BeanWiringInfo(annotation.value(), false);
}
else {
// Default bean name for bean definition to take property values from
return new BeanWiringInfo(getDefaultBeanName(beanInstance), true);
}
}
/**
* Determine the default bean name for the specified bean instance.
* 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();
}
}