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Translate NullBean result to null for lookup method with bean name

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Closes gh-25806
This commit is contained in:
Juergen Hoeller
2020-09-25 11:24:50 +02:00
parent c83f6adc24
commit 21cb9e8bff
2 changed files with 19 additions and 4 deletions
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6
spring-beans/src/main/java/org/springframework/beans/factory/support/CglibSubclassingInstantiationStrategy.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2019 the original author or authors.
* Copyright 2002-2020 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.
@@ -238,8 +238,10 @@ public class CglibSubclassingInstantiationStrategy extends SimpleInstantiationSt
Assert.state(lo != null, "LookupOverride not found");
Object[] argsToUse = (args.length > 0 ? args : null); // if no-arg, don't insist on args at all
if (StringUtils.hasText(lo.getBeanName())) {
return (argsToUse != null ? this.owner.getBean(lo.getBeanName(), argsToUse) :
Object bean = (argsToUse != null ? this.owner.getBean(lo.getBeanName(), argsToUse) :
this.owner.getBean(lo.getBeanName()));
// Detect package-protected NullBean instance through equals(null) check
return (bean.equals(null) ? null : bean);
}
else {
return (argsToUse != null ? this.owner.getBean(method.getReturnType(), argsToUse) :

17
spring-beans/src/test/java/org/springframework/beans/factory/annotation/LookupAnnotationTests.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2019 the original author or authors.
* Copyright 2002-2020 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.
@@ -108,10 +108,23 @@ public class LookupAnnotationTests {
assertThat(beanFactory.getBean(BeanConsumer.class).abstractBean).isSameAs(bean);
}
@Test // gh-25806
public void testWithNullBean() {
RootBeanDefinition tbd = new RootBeanDefinition(TestBean.class, () -> null);
tbd.setScope(BeanDefinition.SCOPE_PROTOTYPE);
beanFactory.registerBeanDefinition("testBean", tbd);
AbstractBean bean = beanFactory.getBean("beanConsumer", BeanConsumer.class).abstractBean;
assertThat(bean).isNotNull();
Object expected = bean.get();
assertThat(expected).isNull();
assertThat(beanFactory.getBean(BeanConsumer.class).abstractBean).isSameAs(bean);
}
public static abstract class AbstractBean {
@Lookup
@Lookup("testBean")
public abstract TestBean get();
@Lookup