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BeanPostProcessors are allowed to return a null bean value in the middle of the chain (SPR-6926) 

git-svn-id: https://src.springframework.org/svn/spring-framework/trunk@3154 50f2f4bb-b051-0410-bef5-90022cba6387
This commit is contained in:
Juergen Hoeller 2010-03-24 10:34:21 +00:00
parent 8825909f04
commit e62e56a1a4
2 changed files with 36 additions and 1 deletions
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11
org.springframework.beans/src/main/java/org/springframework/beans/factory/support/AbstractAutowireCapableBeanFactory.java
View File

@ -392,6 +392,9 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
Object result = existingBean;
for (BeanPostProcessor beanProcessor : getBeanPostProcessors()) {
result = beanProcessor.postProcessBeforeInitialization(result, beanName);
if (result == null) {
return result;
}
}
return result;
}
@ -402,6 +405,9 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
Object result = existingBean;
for (BeanPostProcessor beanProcessor : getBeanPostProcessors()) {
result = beanProcessor.postProcessAfterInitialization(result, beanName);
if (result == null) {
return result;
}
}
return result;
}
@ -682,11 +688,14 @@ public abstract class AbstractAutowireCapableBeanFactory extends AbstractBeanFac
*/
protected Object getEarlyBeanReference(String beanName, RootBeanDefinition mbd, Object bean) {
Object exposedObject = bean;
if (!mbd.isSynthetic() && hasInstantiationAwareBeanPostProcessors()) {
if (bean != null && !mbd.isSynthetic() && hasInstantiationAwareBeanPostProcessors()) {
for (BeanPostProcessor bp : getBeanPostProcessors()) {
if (bp instanceof SmartInstantiationAwareBeanPostProcessor) {
SmartInstantiationAwareBeanPostProcessor ibp = (SmartInstantiationAwareBeanPostProcessor) bp;
exposedObject = ibp.getEarlyBeanReference(exposedObject, beanName);
if (exposedObject == null) {
return exposedObject;
}
}
}
}

26
org.springframework.context/src/test/java/org/springframework/context/annotation/AnnotationConfigApplicationContextTests.java
View File

@ -27,6 +27,7 @@ import static org.junit.matchers.JUnitMatchers.*;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.beans.factory.NoSuchBeanDefinitionException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanPostProcessor;
import org.springframework.context.annotation6.ComponentForScanning;
import org.springframework.context.annotation6.ConfigForScanning;
import org.springframework.context.annotation6.Jsr330NamedForScanning;
@ -154,6 +155,31 @@ public class AnnotationConfigApplicationContextTests {
assertThat(context.getBean(TestBean.class).name, equalTo("foo"));
}
@Test
public void nullReturningBeanPostProcessor() {
AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();
context.register(AutowiredConfig.class);
context.getBeanFactory().addBeanPostProcessor(new BeanPostProcessor() {
public Object postProcessBeforeInitialization(Object bean, String beanName) {
return (bean instanceof TestBean ? null : bean);
}
public Object postProcessAfterInitialization(Object bean, String beanName) {
return bean;
}
});
context.getBeanFactory().addBeanPostProcessor(new BeanPostProcessor() {
public Object postProcessBeforeInitialization(Object bean, String beanName) {
bean.getClass().getName();
return bean;
}
public Object postProcessAfterInitialization(Object bean, String beanName) {
bean.getClass().getName();
return bean;
}
});
context.refresh();
}
@Configuration
static class Config {